F5 (FFIV)

Company ID: 199 | CIK: 0001048695
10-Q view:
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Segments are charted by their disclosed metrics (revenue, segment profit, etc.). Each line is a single segment. Reconciliation/corporate items are excluded. Major customers are shown as a percentage of revenue. Operational KPIs are grouped by metric concept; sub-metrics appear as separate lines.

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DevCentral registered members (users)

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Human capital disclosures. Workforce totals and demographics are point-in-time. Flow metrics use the year-to-date period for 10-Q and full year for 10-K. Workforce actions (RIFs, restructurings, acquisition-related changes) are listed in the table at the bottom.

Workforce Totals

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Workforce Actions

Period EndTypeStatusAffected% WorkforceAnnouncedExpected CompletionGeographySegment / FunctionChargeSourceNote
2026-06-30acquisition_additioncompleted2026-06-15business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Closed 2026-06-15 for $50.1 million cash; acquired assets and assumed liabilities deemed immaterial, no headcount disclosed. Technologies to integrate into F5 AI Security Platform.
2026-06-30restructuringcompleted2025-01-01USD 0 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Adjustments for in-period relief of unused benefits and foreign currency fluctuations related to FY2025 restructuring plans. No significant subsequent charges recorded.
2026-06-30acquisition_additioncompleted2026-06-15business_combinations_footnote
f5-10q / Qwen3.6-27B-Q8_0		Acquisition of SurePath AI, Inc. for $50.1 million. Headcount not disclosed.
2026-06-30acquisition_additioncompleted2025-09-26business_combinations_footnote
f5-10q / Qwen3.6-27B-Q8_0		Acquisition of CalypsoAI Corp for $145.2 million. Headcount not disclosed.
2026-03-31restructuringcompleted2025-01-01USD -358 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Adjustments for in-period relief of unused benefits and foreign currency fluctuations related to FY2025 restructuring plans. No significant subsequent charges recorded.
2025-12-31restructuringin_progressUSD 14 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Program initiated in fiscal 2025 fourth quarter (quarter ended 2025-09-30), covering reduction-in-force and resource optimization; no employee count or announcement date disclosed. Current-quarter activity: $(43)K net adjustment to restructuring charges and $8,175K of severance cash payments, leaving $628K accrued at 2025-12-31.
2025-12-31restructuringcompletedUSD 11 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Fiscal 2025 first-quarter restructuring plan (reduction in force), described as completed with no significant subsequent charges; disclosed for roll-forward context. No employee count or announcement date disclosed.
2025-12-31restructuringin_progress2025-07-01USD -43 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Adjustments for in-period relief of unused benefits and foreign currency fluctuations related to Q4 FY2025 restructuring plan.
2025-12-31acquisition_additioncompleted2025-09-26business_combinations_footnote
f5-10q / Qwen3.6-27B-Q8_0		Acquisition of CalypsoAI Corp. Headcount not explicitly disclosed.
2025-09-30reduction_in_forcecompletedNot specifiedNot specifiedUSD 11 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		First quarter of fiscal 2025 restructuring plan (reduction in workforce), charge net of adjustments; completed during fiscal 2025. Employees affected not disclosed; remaining accrued expenses not material at fiscal year-end
2025-09-30reduction_in_forcecompletedNot specifiedNot specifiedUSD 14 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Fourth quarter of fiscal 2025 restructuring plan (reduction in workforce); $5.5M cash paid for severance and related payroll taxes during fiscal 2025; $8.8M accrued at fiscal year-end. Employees affected not disclosed
2025-09-30acquisition_additioncompleted2025-09-262025-09-26Not specifiedAI security (to be integrated into F5 ADSP)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition closed September 26, 2025 for $145.2 million cash; acquired headcount not disclosed. Three additional immaterial fiscal 2025 acquisitions also completed with headcount not disclosed
2025-09-30restructuringcompleted2025-01-012025-03-31GlobalVariousUSD 11 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		First quarter fiscal 2025 restructuring plan; charge of $11.3 million net of adjustments related to reductions in workforce.
2025-09-30restructuringcompleted2025-07-012025-09-30GlobalVariousUSD 14 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Fourth quarter fiscal 2025 restructuring plan; charge of $14.3 million net of adjustments related to reductions in workforce.
2025-09-30restructuringin_progressUSD 25,484,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2025-06-30restructuringcompletedUSD 11 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Restructuring plan initiated in the first quarter of fiscal 2025 (reduction in force); charge shown is for the nine months ended June 30, 2025. No employees-affected count, announcement date, or completion date disclosed; no significant subsequent charges recorded. Prior-year (FY2024) plan excluded.
2025-06-30acquisition_additioncompletedUSD 12 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Two acquisitions completed in fiscal 2025 Q2 and Q3; $12.0 million of goodwill recorded. Acquired assets and assumed liabilities described as not material; no headcount added disclosed. Charge value shown is goodwill, not a severance charge.
2025-06-30restructuringcompleted2024-10-01GlobalVariousUSD 11 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2025 to match strategic objectives. Includes reduction in force. No significant subsequent charges recorded in Q3.
2025-06-30restructuringcompleted6209%2023-04-19GlobalVariousUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Affected approx 9% of global workforce as of April 19, 2023. Includes severance and facility reduction charges. No significant subsequent charges recorded in current period.
2025-06-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2025-03-31restructuringin_progressNot specifiedNot specifiedUSD 11 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated in first quarter of fiscal 2025 (quarter ended 2024-12-31), including reduction-in-force programs; charges recorded in the three months ended December 31, 2024. No employees-affected count disclosed; no significant subsequent charges in the current quarter. Severance accrual was $165 thousand at 2025-03-31.
2025-03-31acquisition_additioncompletedNot specifiedNot specifiedbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		One acquisition completed during the second quarter of fiscal 2025; $7.5 million of goodwill recorded. Acquired assets and assumed liabilities described as not material; no headcount added disclosed.
2025-03-31restructuringcompleted2024-10-01GlobalVariousUSD 11 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2025 to match strategic objectives and optimize resources, including reduction in force. No significant subsequent charges recorded in Q2.
2025-03-31restructuringcompleted6209%2023-07-01GlobalVariousUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Affected approx 9% of global workforce as of April 19, 2023. No significant subsequent charges recorded in current period.
2025-03-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2024-12-31restructuringcompletedNot specifiedNot specifiedUSD 11 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		First-quarter fiscal 2025 restructuring plan, including reduction-in-force programs, initiated to match strategic and financial objectives. Company does not expect significant future charges related to this plan. No employee count or announcement date disclosed; charge of $11.3M recorded for the three months ended December 31, 2024 (severance accrual roll-forward: $0 beginning, $11.3M charge, $9.2M cash payments, $2.1M ending balance).
2024-12-31restructuringin_progress2024-10-01GlobalVariousUSD 11 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2025 to match strategic objectives. Includes reduction in force. No significant subsequent charges expected.
2024-12-31restructuringin_progressUSD 11,321,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2024-09-30restructuringcompleted2024-09-30GlobalNot specifiedUSD 10 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		First quarter of fiscal 2024 restructuring plan including a reduction in force; charge of $9.8M recorded ($8.7M net of adjustments per MD&A). Remaining accrued expenses not material at fiscal year-end; employee count not disclosed.
2024-09-30acquisition_additioncompletedNot specifiedNot specifiedbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Two acquisitions completed in the second quarter of fiscal 2024; $23.6M of goodwill recorded. Acquired assets and assumed liabilities described as not material; headcount added not disclosed.
2024-09-30restructuringcompleted2024-01-01GlobalGlobalUSD 9 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		First quarter fiscal 2024 restructuring plan. Charge of $9.8 million recorded, net adjustments resulted in $8.7 million charge. Reduction in force program. Employee count not explicitly disclosed in footnote, but MD&A notes decrease in personnel costs.
2024-09-30restructuringcompleted2023-01-01GlobalGlobalUSD 9 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		First quarter fiscal 2023 restructuring plan. Charge of $8.7 million recorded. Reduction in force program.
2024-09-30restructuringcompleted6209%2023-07-01GlobalGlobalUSD 57 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Third quarter fiscal 2023 restructuring plan. Reduction in force affecting approximately 620 employees (9% of global workforce as of April 19, 2023). Includes $53.2 million severance and $3.5 million facility exit charges.
2024-09-30restructuringin_progressUSD 8,655,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2024-06-30restructuringcompletedNot specifiedCompany-wide (reduction in force program)USD 10 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Fiscal 2024 first-quarter plan to align strategy and optimize resources, including a reduction in force; no employee count disclosed. Charge of $9.8M recorded in Q1 FY2024; nine-month net charge was $8.7M after adjustments. Filer reports no significant subsequent charges under this plan.
2024-06-30restructuringcompleted2023-10-01GlobalVariousUSD 9 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2024. Charge of $9.8M recorded, with $8.7M net of adjustments reflected in 9-month results. No significant subsequent charges.
2024-06-30restructuringcompleted6209%2023-04-19GlobalVariousUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Affected approx 620 employees (9% of global workforce as of April 19, 2023). Includes $53.2M severance and $3.5M lease reduction charges.
2024-06-30restructuringcompleted2022-10-01GlobalVariousUSD 9 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2023. Charge of $8.7M recorded. No significant subsequent charges.
2024-06-30restructuringin_progressUSD 93,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2024-03-31restructuringin_progress2023-10-01GlobalCompany-wideUSD 10 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Q1 FY2024 restructuring plan including a reduction in force; employee count not disclosed. A residual $0.1M charge was recorded in Q2 FY2024.
2024-03-31acquisition_additioncompletedUSD 24 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Two acquisitions completed in Q2 FY2024; $23.6M goodwill recorded. Acquired assets and assumed liabilities described as not material; no headcount added disclosed.
2024-03-31restructuringcompleted2024-01-01GlobalVariousUSD 10 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2024 to match strategic objectives and optimize resources, including a reduction in force. Charge of $9.8 million recorded; no significant subsequent charges.
2024-03-31restructuringcompleted6209%2023-04-19GlobalVariousUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Affected approx 620 employees (9% of global workforce as of April 19, 2023). Includes $53.2M severance and $3.5M facility reduction charges. Total costs incurred $56.7M.
2024-03-31restructuringin_progressUSD 90,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2023-12-31restructuringcompletedUSD 10 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		First-quarter fiscal 2024 restructuring plan including a reduction in force; no employee count or announcement date disclosed. Company does not expect significant future charges from this plan. Income statement restructuring line for the quarter was $8.5M net of adjustments; severance roll-forward (beginning $3.5M accrual, $8.5M charges, $9.5M payments, ending $2.5M) combines this plan with residual accruals from prior-year plans.
2023-12-31restructuringcompleted2024-01-01GlobalVariousUSD 10 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2024 to match strategic objectives and optimize resources, including a reduction in force. Company does not expect significant future charges.
2023-12-31restructuringcompleted6209%2023-07-01GlobalVariousUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Affected approx 620 employees (9% of global workforce as of April 19, 2023). Includes severance and facility reduction charges. No significant subsequent charges recorded.
2023-12-31restructuringin_progressUSD 8,472,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2023-09-30restructuringcompletedNot specifiedNot specifiedUSD 9 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		First quarter of fiscal 2023 restructuring plan; reduction in force program. Employees affected not disclosed. Filer states no significant future charges related to this plan
2023-09-30reduction_in_forcecompleted6209%2023-04-19GlobalNot specifiedUSD 57 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Third quarter fiscal 2023 plan: ~620 employees, ~9% of global workforce as of April 19, 2023; charge comprises $53.2M severance and payroll taxes plus $3.5M leased facility reduction. Cash paid for severance in FY2023 was $49.7M; $3.5M accrued at year-end. MD&A estimates annualized savings of ~$130M. Implied workforce base (~6,900) reflects the April 19, 2023 snapshot, higher than the 6,524 at fiscal year-end
2023-09-30acquisition_additioncompleted2023-02-012023-02-01Not specifiedContent Delivery Network technologiesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Lilac Cloud closed February 1, 2023; acquired assets and assumed liabilities described as not material. Headcount added not disclosed
2023-09-30restructuringcompleted6209%2023-04-19GlobalUSD 57 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Reduction in force affecting approx 620 employees (9% of global workforce as of April 19, 2023). Includes $53.2M severance and $3.5M facility exit charges.
2023-09-30restructuringcompleted2023-01-01USD 9 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2023. Reduction in force program. Employee count not explicitly disclosed in footnote.
2023-09-30restructuringin_progressUSD 65,388,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2023-09-30restructuringin_progress620Q3 2023 Restructuring Plan [Member]USD 56,700,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2023-09-30restructuringin_progressQ1 2023 Restructuring Plan [Member]USD 8,700,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2023-06-30restructuringin_progress6209%2023-04-19GlobalCompany-wideUSD 57 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Third quarter fiscal 2023 plan: reduction in force of ~620 employees (~9% of global workforce as of April 19, 2023), comprising $53.2M severance and payroll taxes plus $3.5M for reduction of leased facility space. Severance accrual of $8.4M remained at period end; no significant further charges expected.
2023-06-30restructuringcompletedGlobalCompany-wideUSD 9 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		First quarter fiscal 2023 reduction in force program; employee count not disclosed. Charge fully paid during the nine months ended June 30, 2023 and no significant future charges expected.
2023-06-30acquisition_additioncompleted2023-01-222023-02-01Content Delivery Network technologiesbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed January 22, 2023; closed February 1, 2023. Headcount added not disclosed; acquisition described as not material to operating results.
2023-06-30restructuringin_progress6209%2023-04-19GlobalUSD 57 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q3 FY2023. Includes $53.2M severance and $3.5M lease reduction charges. Affects approx 9% of global workforce as of April 19, 2023.
2023-06-30restructuringcompleted2023-01-01USD 9 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2023. Reduction in force program. No significant future charges expected.
2023-06-30restructuringin_progressUSD 56,648,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2023-06-30restructuringin_progress620Q3 2023 Restructuring Plan [Member]USD 56,700,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2023-06-30restructuringin_progressQ1 2023 Restructuring Plan [Member]USD 8,700,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2023-03-31reduction_in_forcecompleted2022-12-312023-03-31Not specifiedNot specifiedUSD 9 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Reduction-in-force program initiated in the first quarter of fiscal 2023; exact announcement date not disclosed, quarter-end date used as proxy. No employee count disclosed. Company does not expect significant future charges for this plan; $8.1M of the $8.7M charge was paid out by March 31, 2023, leaving $0.6M accrued.
2023-03-31reduction_in_forceannounced6209%2023-04-192023-09-30GlobalNot specifiedUSD 45 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Post-quarter restructuring announced April 19, 2023 affecting approximately 620 employees, about 9% of global workforce as of that date; ~$45.0M severance and related charges expected in fiscal 2023. Plan also includes reductions to leased facilities space (lease termination and other facility costs), which the company cannot yet estimate.
2023-03-31restructuringcompleted2023-01-01GlobalVariousUSD 9 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2023 to match strategic objectives. Charge of $8.7M recorded. No employee count disclosed for this specific action in the footnote, though cash payments of $8.1M were made.
2023-03-31reduction_in_forceannounced6209%2023-04-19GlobalVariousUSD 45 (millions)subsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Announced April 19, 2023. Affects approx 620 employees (9% of global workforce). Expected severance costs of $45.0M in FY2023.
2023-03-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2022-12-31reduction_in_forcecompletedNot specifiedNot specifiedUSD 9 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Q1 FY2023 restructuring plan included a reduction in force; no employee count or completion date disclosed. Company does not expect significant future charges from this plan. Severance accrual roll-forward: $8.7M charged, $6.4M paid, $2.4M accrued at quarter-end.
2022-12-31acquisition_additionannounced2023-01-222023-02-01Not specifiedNot specifiedsubsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement with Lilac Cloud signed 2023-01-22, closed 2023-02-01; acquired headcount not disclosed and acquisition not expected to materially affect operating results.
2022-12-31restructuringin_progress2022-10-01USD 9 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2023 to match strategic objectives; includes reduction in force. Charge of $8.7M recorded. No employee count disclosed.
2022-12-31restructuringin_progressUSD 8,740,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2022-09-30reduction_in_forcecompleted702021-12-31Not specifiedNot specifiedUSD 8 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Restructuring plan initiated in the first quarter of fiscal 2022 to align strategic and financial objectives, affecting approximately 70 positions; completed in Q1 FY2022 per Item 1A risk factors. Filer does not expect significant future charges related to this plan. Announcement date not disclosed; completion date inferred from stated Q1 FY2022 completion.
2022-09-30acquisition_additioncompleted2021-092021-10-01United StatesSecurity / cloud workload protection (R&D)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Threat Stack, Inc. closed October 1, 2021 for approximately $68.9 million cash; headcount added not disclosed (pro forma and Threat Stack results described as not material). MD&A notes R&D headcount growth in fiscal 2022 included employees from this acquisition.
2022-09-30restructuringcompleted702022-10-012022-12-31GlobalVariousUSD 8 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in first fiscal quarter of 2022 to match strategic and financial objectives. Affected approximately 70 positions.
2022-09-30restructuringin_progressUSD 7,909,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2022-06-30reduction_in_forcecompleted70USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated in first quarter of fiscal 2022; approximately 70 positions affected; company states no significant future charges expected. Announcement date not disclosed.
2022-06-30acquisition_additioncompletedbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement entered September 2021, closed 2021-10-01; headcount added not disclosed, revenue and earnings stated as immaterial.
2022-06-30restructuringcompleted702022-01-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in Q1 FY2022; reduction in force affecting approx 70 positions. Charge of $7.9M recorded in Q1.
2022-06-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2022-03-31reduction_in_forcecompleted702021-12-31USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated in Q1 FY2022 (quarter ended 2021-12-31); exact announcement date not disclosed. Affects approximately 70 positions; no significant further charges expected. Severance accrual roll-forward: $7.9M charged, $6.6M paid, $1.3M remaining at 2022-03-31.
2022-03-31acquisition_additioncompleted2021-09-302021-10-01Cloud security / workload protection (Threat Stack)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquisition closed 2021-10-01 for approximately $68.9M cash; headcount added not disclosed. Revenue and earnings of Threat Stack described as not material.
2022-03-31restructuringcompleted702022-01-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Reduction in force program affecting approximately 70 positions initiated in the first quarter of fiscal 2022.
2022-03-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2021-12-31reduction_in_forcein_progress70USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated during Q1 FY2022 covering approximately 70 positions; exact announcement date, geography, and completion date not disclosed. $4.0M paid in the quarter, $3.9M accrued at 2021-12-31; no significant further charges expected.
2021-12-31acquisition_additioncompleted2021-10-012021-10-01United StatesCloud security and workload protectionbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Threat Stack acquisition closed 2021-10-01; headcount added not quantified in the filing. $1.5M of transaction costs recorded in G&A.
2021-12-31restructuringin_progress702021-10-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Reduction in force program affecting approximately 70 positions to match strategic and financial objectives.
2021-12-31restructuringin_progressUSD 7,909,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2021-09-30reduction_in_forceannouncedother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Risk factor references a recently announced workforce re-alignment including a reduction in force program; no count, date, charge or completion timeline disclosed. May relate to the December 2019 restructuring program reported in prior filings (75 employees, $7.8M charge, completed Q1 fiscal 2020, no fiscal 2021 charge recorded)
2021-09-30acquisition_additioncompleted2021-01-052021-01-22Edge platform (Volterra)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Headcount added through the acquisition not disclosed; cash consideration of $427.2 million; $9.5 million transaction costs expensed in fiscal 2021
2021-09-30acquisition_additioncompleted2021-10-01Cloud security (Threat Stack)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Merger agreement entered September 2021 (day not disclosed); transaction closed October 1, 2021, after fiscal year-end. Headcount added not disclosed; approximately $68 million cash consideration; $1.7 million acquisition/integration costs recorded in fiscal 2021 G&A
2021-09-30restructuringcompleted2020-01-012020-03-31GlobalVariousUSD 8 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Completed in the first fiscal quarter of 2020. Recorded a restructuring charge of $7.8 million related to a reduction in workforce. No specific employee count disclosed for this action in the current filing.
2021-09-30acquisition_additioncompleted2021-01-222021-01-22GlobalVariousMD&A
f5-10k / Qwen3.6-27B-Q8_0		Acquisition of Volterra completed January 22, 2021. MD&A notes increases in sales and marketing, R&D, and G&A headcount driven by employees from the acquisition, but does not disclose a specific total headcount added.
2021-09-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2021-06-30acquisition_additioncompleted2021-01-052021-01-22business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Volterra, Inc. (edge-as-a-service platform) became a wholly-owned subsidiary on 2021-01-22; no headcount added disclosed. Unvested Volterra equity held by continuing employees was assumed by F5. Purchase consideration was approximately $427.2 million in cash; $9.5 million of transaction costs recorded in G&A (not a workforce charge).
2021-06-30restructuringcompleted752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Plan initiated in Dec 2019 affecting approx 75 employees. Charge recorded in Q1 FY2020. No significant future charges expected.
2021-06-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2021-03-31acquisition_additioncompleted2021-01-052021-01-22United StatesEdge-as-a-service platform solutionsbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Volterra, Inc. acquisition closed 2021-01-22 for approximately $427.2 million in cash; no employee headcount added disclosed. Unvested equity awards held by continuing Volterra employees were assumed by F5.
2021-03-31restructuringcompleted752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Plan initiated in Dec 2019; charge recorded in Q1 FY2020. No significant future charges expected.
2021-03-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2020-12-31acquisition_additioncompleted2021-01-052021-01-22USD 3 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed 2021-01-05, closed 2021-01-22; approximately $440 million cash plus $60 million deferred consideration. No employee count disclosed; $2.7 million of acquisition-related expenses recorded in G&A during the quarter. Unvested Volterra equity held by continuing employees assumed by F5.
2020-12-31restructuringcompleted752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Plan initiated in Dec 2019; charge recorded in Q1 FY2020. No significant future charges expected.
2020-12-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2020-09-30reduction_in_forcecompleted752019-122019-12-31Not specifiedNot specifiedUSD 8 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Restructuring plan initiated December 2019 to align strategic and financial objectives, including a reduction in force affecting approximately 75 employees; charge recorded in Q1 fiscal 2020 and program substantially complete (accrued balance of $0.2 million at year-end).
2020-09-30acquisition_additioncompleted2019-12-192020-01-24United StatesApplication security / fraud preventionbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Shape Security acquired January 24, 2020 for approximately $1.0 billion; headcount added through the acquisition is not quantified in the filing. Shape employees are reflected in fiscal 2020 function-level headcount increases disclosed in MD&A.
2020-09-30restructuringcompleted752019-12-012020-03-31GlobalVariousUSD 8 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in December 2019 to match strategic and financial objectives. Completed in the first quarter of fiscal 2020.
2020-09-30restructuringin_progressUSD 7,800,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2020-06-30reduction_in_forcecompleted752019-12USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated December 2019 to align strategic and financial objectives; charge recorded in Q1 FY2020 and program completed in that quarter. Approximately 75 employees affected; $7.6M paid in cash by June 30, 2020 with $0.2M accrued remaining. Filer states no significant future charges expected.
2020-06-30acquisition_additioncompleted2019-12-192020-01-24Shape Security, Inc.business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed 2019-12-19, closed 2020-01-24 for approximately $1.0 billion in cash. Headcount added through the acquisition is not disclosed; unvested options and RSUs held by continuing Shape employees were assumed by F5.
2020-06-30restructuringcompleted752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in December 2019; charge recorded in Q1 FY2020. Company does not expect significant future charges.
2020-06-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2020-03-31reduction_in_forcecompleted752019-122019-12-31USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated December 2019 to align strategic and financial objectives; reduction in force affected approximately 75 employees. Charge recorded in fiscal Q1 2020; $6.956M paid and $0.844M accrued at 2020-03-31. MD&A states the plan was completed in fiscal Q1 2020 with no significant future charges expected.
2020-03-31acquisition_additioncompleted2019-12-192020-01-24Shape Security, Inc.business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed 2019-12-19; acquisition of Shape Security closed 2020-01-24 for approximately $1.0 billion cash. Headcount added through the acquisition is not disclosed; filing states Shape revenue and earnings were not material and pro forma information was not considered material.
2020-03-31restructuringcompleted752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Reduction in force program affecting approximately 75 employees initiated in December 2019. Charge recorded in Q1 FY2020.
2020-03-31restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2019-12-31reduction_in_forcecompleted752019-122019-12-31USD 8 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Reduction in force of approximately 75 employees initiated December 2019 to align strategic and financial objectives; $7.8M charge recorded in Q1 FY2020, of which $5.3M paid in cash and $2.5M accrued at quarter-end. MD&A states the plan was completed during the quarter; no significant future charges expected.
2019-12-31acquisition_additioncompleted2019-12-192020-01-24Shape Security, Inc.subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed 2019-12-19; acquisition closed 2020-01-24 for approximately $1.0 billion in cash. No employee count for Shape disclosed; initial purchase price accounting incomplete at filing. Approximately $4.0M of acquisition and integration expenses incurred in Q1 2020.
2019-12-31restructuringin_progress752019-12-01USD 8 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Reduction in force program affecting approximately 75 employees. Charge recorded in Q1 FY2020.
2019-12-31restructuringin_progressUSD 7,800,000 (absolute)restructuring_footnote
f5-10q / no-ai-xblr
2019-09-30restructuringcompleted2152018-072019-09-30GlobalCompany-wideUSD 18 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Cumulative program figures as presented: announced July 2018 with the $18.4M charge recorded in Q4 fiscal 2018; the filing states all severance costs had been incurred and the plan was complete as of September 30, 2019. No restructuring charge was recorded in fiscal 2019.
2019-09-30acquisition_additioncompleted2019-05-082019-05-08GlobalCompany-wideUSD 643 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Nginx, Inc. closed May 8, 2019 for $643.2M; acquired headcount is not disclosed (pro forma and NGINX standalone results deemed immaterial). NGINX employees are reflected in the fiscal 2019 increases in sales & marketing, R&D, and G&A headcount.
2019-09-30restructuringcompleted2152018-07-012019-09-30GlobalVariousUSD 18 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated July 2018 to match strategic objectives. Charge recorded in FY2018 Q4. Plan complete as of FY2019 year-end.
2019-09-30restructuringin_progressUSD 0 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2019-06-30acquisition_additioncompleted2019-03-092019-05-08GlobalCompany-wide (Nginx, Inc.)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger agreement signed 2019-03-09; transaction closed 2019-05-08 with Nginx becoming a wholly-owned subsidiary. Unvested options and RSUs held by continuing Nginx employees were assumed by F5. No employee count for the acquired workforce is disclosed in the filing.
2019-03-31acquisition_additionannounced2019-03-092019-06-30United States (San Francisco, California)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Definitive agreement announced March 9, 2019 to acquire Nginx, Inc. for total enterprise value of approximately $670 million; expected to close in the second calendar quarter of 2019. No headcount added disclosed. Company also suspended its share repurchase program in connection with this acquisition.
2018-09-30restructuringcompleted2152018-07Not specifiedCompany-wide reduction in forceUSD 18 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Program announced July 2018 to align workforce with strategic and financial objectives; charge recorded in Q4 FY2018. Filer states no significant future charges expected. Accrued balance of $8.3M remained at fiscal year-end.
2018-09-30restructuringcompleted2152018-07-01GlobalVariousUSD 18 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Announced in July 2018 to match strategic and financial objectives. Charge recorded in Q4 FY2018.
2018-09-30restructuringin_progress215USD 18,426,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2018-06-30reduction_in_forceannounced2302018-07-202018-09-30USD 20 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Announced July 20, 2018, after the June 30, 2018 quarter close; described as a reduction in force affecting approximately 230 employees. Severance charge estimated in the range of $20.0 million to $21.5 million (value field shows low end of disclosed range). Company expects most charges to be recognized in fiscal Q4 2018. Also referenced in Part II Risk Factors; extracted once here.
2018-06-30plant_closureannounced2018-07-202018-09-30Lowell, Massachusetts, United StatesUSD 3 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Component of the same July 20, 2018 restructuring program: closure of the Lowell, Massachusetts office plus reduction of leased office space. Lease termination and facility costs estimated at $3.0 million to $3.5 million (value field shows low end of disclosed range). No separate employee count disclosed for this component; no headcount impact quantified beyond the ~230 RIF.
2018-06-30restructuringannounced2302018-07-20GlobalVariousUSD 23 (millions)subsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Reduction in force affecting approx. 230 employees. Includes Lowell, MA office closure. Total estimated expenses $23.0M-$25.0M ($20.0M-$21.5M severance, $3.0M-$3.5M lease costs). Charges expected in Q4 FY2018.
2017-09-30restructuringin_progress2017-09Not specifiedCompany-wide workforce reductionUSD 13 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Restructuring plan initiated September 2017 to reduce operating expenses and align workforce with market opportunities; $12.7M charge recorded in Q4 FY2017 for severance and employee-related costs. $4.98M paid during the year with $7.74M accrued at year-end; filer does not expect significant future charges. Number of employees affected is not disclosed. Headcount reductions are also reflected in year-end function counts (sales and marketing 1,711 vs. 1,741; R&D 1,192 vs. 1,211; professional services 895 vs. 903).
2017-09-30restructuringcompleted2017-09-01GlobalSales and Marketing, Research and Development, Professional ServicesUSD 13 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in September 2017 to reduce operating expenses. Charge of $12.7 million recorded in Q4 FY2017 for severance and employee-related costs. Specific headcount reduction numbers not disclosed in the filing, though MD&A notes decreases in headcount for Sales/Marketing, R&D, and Professional Services due to this reduction.
2017-09-30restructuringin_progressUSD 12,718,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2014-09-30acquisition_additioncompleted2014-05-222014-05-22United States (Belmont, California)Security / cloud-based DDoS servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired for $49.7 million; filer notes acquisition of engineering talent but does not disclose employee count added.
2014-06-30acquisition_additioncompleted2014-05-22United StatesSecurity (cloud-based DDoS services)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquired all shares of Defense.Net for $49.7 million on 2014-05-22; acquired headcount not disclosed in the filing
2013-09-30acquisition_additioncompleted2013-02-112013-02-11United States (Louisville, Colorado)Product developmentUSD 125 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Purchase price $125.3 million ($124.9 million cash net per MD&A); acquired headcount not disclosed.
2013-09-30acquisition_additioncompleted2013-09-172013-09-17Israel (Rishon LeZion)Security (web anti-fraud, anti-phishing, anti-malware)USD 92 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Purchase price $91.7 million ($87.7 million cash net per MD&A); acquired headcount not disclosed.
2013-06-30acquisition_additioncompleted2013-02-11United States (Louisville, Colorado)Software defined network services (R&D)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquired all outstanding shares for $125.3 million; headcount added not disclosed in the filing.
2013-03-31acquisition_additioncompleted2013-02-11United States (Louisville, Colorado)Software defined network services (R&D)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquired all outstanding shares of LineRate Systems, Inc. for $125.3 million; no employee headcount for the acquired workforce is disclosed. Results consolidated from acquisition date.
2012-09-30acquisition_additioncompleted2012-02-222012-02-22IsraelProduct development (Diameter signaling products)USD 134 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Cash purchase price of $133.7 million; headcount added through the acquisition not disclosed
2012-09-30acquisition_additioncompleted2012-02-222012-02-22IsraelTelecommunications / Application Delivery NetworkingUSD 134 (millions)business_combinations_footnote
f5-10k / Qwen3.6-27B-Q8_0		Acquisition of Traffix Communication Systems Ltd. for $133.7 million in cash. Specific headcount added not disclosed in the filing.
2012-03-31acquisition_additioncompleted2012-02-222012-02-22IsraelDiameter signaling products (telecommunications)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquired all issued and outstanding shares of Traffix Communication Systems Ltd. for $133.7 million cash; acquired headcount not disclosed.
2011-09-30restructuringcompleted2009-04-012011-09-30WorldwideUSD 4 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Program initiated in Q2 FY2009. All accrued costs incurred as of FY2011 year-end. Specific headcount reduction not disclosed in current filing.
2010-09-30restructuringcompleted2009-04-012010-09-30WorldwideVariousUSD 4 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in Q2 FY2009. Included consolidation of facilities, accelerated depreciation, and workforce reduction. All accrued costs incurred by FY2010 end.
2010-06-30restructuringin_progressrestructuring_footnote
f5-10q / no-ai-xblr
2009-09-30restructuringcompleted2009-01-01WorldwideCompany-wide; included facility exits and workforce reductionUSD 4 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Program initiated January 2009 (Q2 FY2009): $2.1M severance and related costs plus $2.2M facility exit/consolidation. $0.6M accrued at 2009-09-30 to offset future rent through September 2012. Employees affected not disclosed; headcount reductions noted in MD&A across sales & marketing, R&D, and G&A functions.
2009-09-30restructuringcompleted2009-04-012012-09-30WorldwideSales and Marketing, Research and Development, General and AdministrativeUSD 4 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Initiated in Q2 FY2009. Includes consolidation of facilities, accelerated depreciation, and workforce reduction. Accrued expenses of $0.6 million remain to offset future lease payments through Sept 2012. Specific headcount reduction not disclosed.
2009-06-30restructuringin_progress2009-01WorldwideCompany-wideUSD 4 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Plan initiated January 2009: facility consolidation, accelerated depreciation on tenant improvements and workforce reduction; $4.3M charge recorded in fiscal Q2 2009 ($2.1M severance, $2.2M facility exits). Employees affected not disclosed. $0.8M accrual at 2009-06-30 offsets lease payments through September 2012.
2009-06-30restructuringin_progress2009-01-012012-09-30WorldwideVariousUSD 4 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in January 2009. Includes consolidation of facilities, accelerated depreciation, and reduction in workforce. $4.3M charge recorded in Q2 FY2009 ($2.1M severance, $2.2M facility exit). $0.8M accrued to offset lease payments through Sept 2012. Employee count not explicitly disclosed.
2009-03-31layoffcompleted2009-012009-03-31WorldwideNot specifiedUSD 2 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Restructuring plan initiated January 2009 included a reduction in workforce; the full $2.1M severance and benefits accrual was paid out during the quarter ended March 31, 2009. Number of employees affected is not disclosed.
2009-03-31restructuringin_progress2009-012012-09-30WorldwideFacilitiesUSD 2 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Facility consolidation and office exits component of the January 2009 restructuring plan; $2.2M accrued at March 31, 2009 to offset future lease payments through September 2012. Also included accelerated depreciation on tenant improvements.
2009-03-31restructuringin_progress2009-01-012012-09-30WorldwideAll functionsUSD 4 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Initiated in January 2009. Includes consolidation of facilities, accelerated depreciation, and workforce reduction. $2.1M paid for severance, $2.2M accrued to offset future lease payments through Sept 2012. Employee count not explicitly disclosed.
2008-12-31restructuringannounced2009-01-21USD 5 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Announced pre-tax restructuring and other charge of $4.5 to $5.5 million expected in the second quarter of fiscal 2009, covering a facility exit, workforce reduction and accelerated depreciation on tenant improvements; no employee count disclosed
2008-12-31restructuringannounced2009-01-21USD 6 (millions)subsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Company announced expected pre-tax charge of $4.5 to $5.5 million in Q2 FY2009 related to loss on facility exit, workforce reduction, and accelerated depreciation.
2008-09-30plant_closurecompletedUnited States (Bellevue and Seattle, Washington)Research and development; corporate headquartersUSD 5 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2008 exit of Bellevue, WA R&D facility (lease through 2014) and HQ consolidation via partial sublease of 333 Elliott Ave West (lease through 2018); charge recorded in Q4 FY2008. No employee-reduction count disclosed.
2008-06-30plant_closureannounced2008-06-302008-09-30Bellevue, Washington, USA; Seattle, Washington, USAUSD 3 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Post-quarter closure of Bellevue office and sublease of part of Seattle office space; anticipated loss of approximately $3.3 million net of tax in Q4 fiscal 2008. No employee count disclosed.
2007-12-31acquisition_additioncompleted2007-09Product development, sales and marketing (ARX product line)MD&A
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acopia Networks acquisition closed September 2007; filing references added Acopia personnel in R&D and sales and marketing headcount growth but discloses no headcount figure for the acquisition
2007-09-30acquisition_additioncompleted2007-09-122007-09-12United States (Lowell, Massachusetts)File virtualization (ARX product line)USD 210 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Total purchase price approximately $210.0 million; headcount added not disclosed. Acopia sales team referenced in Item 1; Acopia excluded from ICFR assessment with total assets of $5.3 million and revenues of $1.6 million post-acquisition
2007-09-30acquisition_additioncompleted2007-09-122007-09-12United StatesAll FunctionsUSD 210 (millions)business_combinations_footnote
f5-10k / Qwen3.6-27B-Q8_0		Acquired Acopia Networks for $210.0 million. Specific headcount added not disclosed in filing, but sales team acquired noted in Item 1.
2007-06-30acquisition_additionannounced2007-08-062007-09-14United States (Lowell, Massachusetts)File virtualization solutions (Acopia Networks, Inc.)USD 210 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Post-quarter announcement of a $210 million all-cash acquisition of Acopia Networks; no employee count disclosed for the acquired workforce. Charge value reflects purchase price, not a workforce-related charge.
2006-09-30acquisition_additioncompleted2005-10-042005-10-04United States (San Jose, California)WAN optimization and application accelerationUSD 46 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Purchase price of $43.0M cash plus $3.2M direct transaction costs; acquired headcount not disclosed. Cash outflow net of cash acquired was $42.8M per the cash flow statement.
2006-09-30restructuringin_progress2007-09-30United States (Washington D.C. support facility)Support operationsrestructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Excess facility lease liability from the fiscal 2002 decision to exit the cache appliance business and Washington D.C. support facility; roll-forward shows $0.5M cash payments during fiscal 2006 and a $59K balance at year-end. No employee count or severance disclosed; no new restructuring charges in fiscal 2006.
2006-06-30acquisition_additioncompleted2005-10-04United States (San Jose, California)WAN optimization and application acceleration (Swan Labs)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Swan Labs for $43.0 million cash plus $3.2 million transaction costs; no headcount added disclosed. Acquisition closed in fiscal Q1 2006, before the quarter covered by this filing
2006-03-31acquisition_additioncompleted2005-10-04United States (San Jose, California)WAN optimization and application accelerationbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Swan Labs for $43.0 million cash plus $3.2 million transaction costs; acquired headcount not disclosed in the filing
2005-12-31acquisition_additioncompleted2005-10-042005-10-04United StatesWAN optimization and application acceleration (Swan Labs)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquisition of Swan Labs, Inc. for $43.0 million cash plus $3.2 million transaction costs; results included from acquisition date. Number of employees added not disclosed
2005-09-30acquisition_additioncompleted2005-10-042005-10-04United States (San Jose, California; also Belfast, Northern Ireland development facility)WAN optimization and web acceleration (WANJet, WebAccelerator)USD 43 (millions)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Cash purchase price of $43.0 million plus $3.2 million direct transaction costs (total ~$46.2 million); acquired October 4, 2005, after fiscal year-end. Employee count added not disclosed.
2005-09-30acquisition_additioncompleted2005-10-042005-10-04United States (San Jose, California)WAN optimization and application accelerationUSD 46 (millions)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of all capital stock of Swan Labs, Inc. for $43.0 million cash plus $3.2 million direct transaction costs; headcount added through the acquisition is not disclosed.
2005-09-30acquisition_additioncompleted2005-10-042005-10-04United States (San Jose, California; Belfast, Northern Ireland)WAN optimization and web acceleration (WANJet, WebAccelerator)USD 43 (millions)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Swan Labs acquisition closed 2005-10-04 for $43.0M cash plus $3.2M transaction costs; acquired headcount not disclosed.
2005-09-30acquisition_additioncompleted2005-10-042005-10-04United States (San Jose, California)WAN optimization and application acceleration businessUSD 46 (millions)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of all capital stock of Swan Labs, Inc. for $43.0 million cash plus $3.2 million transaction costs; no headcount disclosed.
2005-09-30restructuringin_progress2007Washington, D.C. / United StatesExcess facility (originally related to cache appliance business exit)other
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Excess facility lease liability of $559 thousand at September 30, 2005 after $66 thousand payments; charge originally recognized in fiscal 2002, no employee-affected count disclosed.
2004-09-30acquisition_additioncompleted2004-05-312004-05-31IsraelSecurity business unit (TrafficShield product development)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of MagniFire completed 2004-05-31 for $30.5 million purchase price; acquired employees were not relocated to Seattle and a new security business unit was formed. Headcount added not quantified in the filing.
2004-09-30restructuringcompleted472002-07-012002-07-01GlobalAll divisionsUSD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Fiscal 2002 restructuring charge of $3.3 million related to exiting cache appliance business. 47 employees terminated in July 2002. Liability balance decreased from $844k to $625k in FY2004 due to payments/write-offs.
2004-06-30acquisition_additioncompleted2004-05-312004-05-31United StatesWeb application security (TrafficShield product line)USD 31 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		MagniFire acquisition completed May 31, 2004; $30.5M purchase price including $1.5M transaction costs. Employee count added not disclosed; R&D headcount growth partly attributed to this deal in MD&A
2004-06-30restructuringin_progress2002-09-302007-04-30Washington DCSupport facilityUSD 1 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Remaining liability for excess facilities from fiscal 2002 restructuring. Lease ends April 2007. No new charges in current period.
2003-12-31restructuringin_progressWashington DCSupport facilityUSD 1 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Remaining liability for excess facilities from fiscal 2002 restructuring. Sublease income collectibility in question; no payments applied to liability in Q1 2004.
2003-12-31acquisition_additioncompleted2003-07-01Research and developmentMD&A
f5-10q / Qwen3.6-27B-Q8_0		Headcount increase in R&D driven by acquisition of uRoam, Inc. in July 2003. Specific employee count not disclosed.
2003-09-30acquisition_additioncompleted202003-07-232003-07-23United States (San Jose, California)Product development, sales and serviceUSD 27 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		F5 acquired substantially all assets of uRoam for $25.0M cash plus $2.4M transaction costs; hired substantially all of uRoam's 20 employees. Charge shown is total purchase price, not severance.
2003-09-30restructuringcompleted472002-07-012002-07-31GlobalAll divisionsUSD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Charge recorded in Q3 FY2002 to exit cache appliance business. 47 employees terminated by July 2002. Total charge $3.3 million ($2.8m initial + $0.5m additional).
2003-09-30acquisition_additioncompleted202003-07-012003-07-31United StatesProduct development, sales and serviceItem_1_Business
f5-10k / Qwen3.6-27B-Q8_0		Acquisition of uRoam, Inc. assets. Hired substantially all of uRoam's 20 employees.
2003-06-30acquisition_additionannounced202003-07-23United States (Sunnyvale, California)Product development, sales and service supportUSD 27 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Post-quarter asset acquisition of uRoam, Inc. for $25.0M cash plus $2.3M transaction costs; substantially all of uRoam's 20 employees were hired. Charge shown is total purchase price, not a workforce charge.
2003-06-30restructuringcompleted472002-07-01GlobalAll divisionsUSD 3 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Terminated 47 employees in Q3 FY2002 to exit cache appliance business. Total charges $3.3M including $0.5M recorded in July 2002.
2003-06-30acquisition_additioncompleted202003-07-23Sunnyvale, CaliforniaProduct development, sales and service supportsubsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Acquired uRoam, Inc. and hired substantially all of its 20 employees.
2002-12-31restructuringin_progress472002-09-30GlobalAll divisionsUSD 3 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Charges recorded in Q3 FY2002 for exiting cache appliance business; 47 employees terminated.
2002-09-30restructuringcompleted472002-06-302002-07-31All divisions (global)Cache appliance business and all divisionsUSD 3 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Charge of approximately $2.8M recorded in Q3 FY2002 on the decision to exit the cache appliance business, including asset write-downs, facility consolidation and termination of 47 employees; an additional $503K separation charge arose in July 2002 when all identified employees were terminated. Total FY2002 restructuring charge of $3,274K per the income statement. Announcement date reflects the quarter (ended 2002-06-30) in which the charge was recorded; exact announcement day not disclosed.
2002-09-30restructuringcompleted472002-06-302002-07-31GlobalAll divisionsUSD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Charge recorded in Q3 FY2002 to exit cache appliance business. Includes asset write-downs and employee separations. Terminations completed in July 2002.
2002-06-30restructuringin_progress472002-06-30All divisions, company-wideCache appliance business exit; all divisionsUSD 3 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Q3 FY2002 charge to exit cache appliance business: $1.0M excess facilities, $1.56M asset impairments, $0.211M other; 47 employees terminated across all divisions. Exact announcement date not disclosed.
2002-06-30restructuringcompleted2002-072002-07All divisions, company-wideCache appliance business exit; all divisionsUSD 1 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Subsequent event: in July 2002 all identified employees were notified and terminated, adding roughly $500,000 of employee separation costs. Count not separately disclosed; relates to the same program as the 47 terminations.
2002-06-30restructuringin_progress472002-06-30GlobalAll divisionsUSD 3 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Exit of cache appliance business; terminated 47 employees. Additional $500k charge in July 2002 for separation costs.
2001-09-30restructuringcompleted962001-01-31United StatesAll divisionsUSD 975 (thousands)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Program initiated in Q1 FY2001 (Oct–Dec 2000); exact announcement date not disclosed. Original accrual of $1.1 million reduced by a $96,000 reversal in the quarter ended 2001-03-31, yielding $975 thousand net charge for FY2001. All identified employees terminated by January 2001 and substantially all accrual paid by year-end.
2001-09-30restructuringcompleted962000-10-012001-01-31GlobalAll divisionsUSD 1 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Charge recorded in first fiscal quarter of 2001 to bring operating expenses in line with business revenue growth model. Terminations completed in January 2001. Substantially all accrued charges paid by September 30, 2001.
2001-06-30restructuringcompleted962001-01-012001-01-31GlobalAll divisionsUSD 1 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Charge recorded in Q1 FY2001. All employees terminated in Jan 2001. $96k reversal in Q1 due to estimate revision. Substantially all accrued charges paid by Mar 31, 2001.
2001-03-31restructuringcompleted962000-10-012001-01-31All divisions (global)All divisionsUSD 1 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Exact announcement date not disclosed; charge recorded during first fiscal quarter of 2001 (Oct-Dec 2000) to align operating expenses with the business revenue growth model. All 96 identified employees terminated by January 2001; $96,000 of accrual reversed in the quarter ended March 31, 2001, and substantially all of the charge had been paid by March 31, 2001.
2001-03-31restructuringcompleted962001-01-012001-01-31GlobalAll divisionsUSD 1 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Charge recorded in first fiscal quarter 2001 to align operating expenses with revenue growth model. All identified employees terminated in January 2001. $96,000 of original accrual reversed in Q2 due to estimate revision.
2000-12-31restructuringcompleted9617%2001-01-31GlobalAll divisionsUSD 1 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Charge recorded in Q1 FY2001 to align operating expenses with revised revenue growth model; ~$1.1M accrued in accrued liabilities at 2000-12-31; all identified employees terminated by January 2001. MD&A describes it as a 17% workforce reduction; implied workforce total (~565) is not otherwise disclosed in the filing
2000-12-31restructuringcompleted9617%2000-12-312001-01-31GlobalAll divisionsUSD 1 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Termination of 96 employees (17% of workforce) to align expenses with revenue growth model. All terminations completed in January 2001.