F5, Inc.
US ˙ NasdaqGS ˙ US3156161024

SecurityFFIV / F5, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership196,205 shares
Latest Disclosed Value $ 50,086,482
Sei Investments Co ownership in FFIV / F5, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 196,205 shares of F5, Inc. (US:FFIV) valued at $50,083,288 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 147,920 shares of F5, Inc.. This represents a change in shares of 32.64% during the quarter. The current value of the position is $79,592,520 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (FFIV) in the form of stock options.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

FFIV / F5, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F F5 COM 315616102 196,205 48,285 32.64 50,086 4.76 0.0494
2025-11-13 2025-09-30 13F F5 COM 315616102 147,920 5,651 3.97 47,808 14.18 0.0514
2025-08-14 2025-06-30 13F F5 COM 315616102 142,269 -5,949 -4.01 41,872 6.09 0.0485
2025-05-14 2025-03-31 13F/A-1 F5 COM 315616102 148,218 -35,133 -19.16 39,467 -14.40 0.0508
2025-05-13 2025-03-31 13F F5 COM 315616102 162,583 -20,768 42,223 0.0459
2025-02-11 2024-12-31 13F F5 COM 315616102 183,351 894 0.49 46,106 14.77 0.0592
2024-11-12 2024-09-30 13F F5 COM 315616102 182,457 47,009 34.71 40,175 72.21 0.0522
2024-08-13 2024-06-30 13F F5 COM 315616102 135,448 5,422 4.17 23,328 -5.37 0.0331
2024-05-07 2024-03-31 13F F5 COM 315616102 130,026 25,524 24.42 24,653 31.81 0.0361
2024-02-14 2023-12-31 13F F5 COM 315616102 104,502 9,683 10.21 18,703 22.41 0.0300
2023-11-14 2023-09-30 13F F5 COM 315616102 94,819 -11,247 -10.60 15,279 -1.51 0.0275
2023-08-11 2023-06-30 13F F5 COM 315616102 106,066 1,689 1.62 15,513 2.02 0.0271
2023-05-12 2023-03-31 13F F5 COM 315616102 104,377 13,044 14.28 15,207 16.01 0.0282
2023-02-10 2022-12-31 13F F5 COM 315616102 91,333 10,892 13.54 13,107 12.59 0.0291
2022-11-14 2022-09-30 13F F5 COM 315616102 80,441 10,974 15.80 11,641 10.04 0.0260
2022-08-15 2022-06-30 13F F5 COM 315616102 69,467 1,750 2.58 10,579 -24.80 0.0228
2022-05-13 2022-03-31 13F F5 COM 315616102 67,717 9,454 16.23 14,067 -1.26 0.0283
2022-02-14 2021-12-31 13F F5 COM 315616102 58,263 -18,362 -23.96 14,246 -6.59 0.0267
2021-11-12 2021-09-30 13F F5 NETWORKS COM 315616102 76,625 17,769 30.19 15,251 38.87 0.0320
2021-08-06 2021-06-30 13F F5 NETWORKS COM 315616102 58,856 7,453 14.50 10,982 10.59 0.0244
2021-05-12 2021-03-31 13F F5 NETWORKS COM 315616102 51,403 -21,217 -29.22 9,930 -22.22 0.0250
2021-02-08 2020-12-31 13F F5 NETWORKS COM 315616102 72,620 3,570 5.17 12,767 51.09 0.0330
2020-12-04 2020-09-30 13F/A-1 F5 NETWORKS COM 315616102 69,050 12,781 22.71 8,450 6.40 0.0245
2020-11-06 2020-09-30 13F F5 NETWORKS COM 315616102 76,626 20,357 9,380 22,584.9545
2020-08-17 2020-06-30 13F/A-1 F5 NETWORKS COM 315616102 56,269 28,026 99.23 7,942 162.46 0.0246
2020-08-11 2020-06-30 13F F5 NETWORKS COM 315616102 26,791 -1,452 3,831 10,391.7914
2020-05-14 2020-03-31 13F F5 NETWORKS COM 315616102 28,243 23,018 440.54 3,026 301.33 0.0111
2020-02-06 2019-12-31 13F F5 NETWORKS COM 315616102 5,225 -13,394 -71.94 754 -70.99 0.0022
2019-11-12 2019-09-30 13F F5 NETWORKS COM 315616102 18,619 -5,454 -22.66 2,599 -25.59 0.0066
2019-08-14 2019-06-30 13F F5 NETWORKS COM 315616102 24,073 -4,612 -16.08 3,493 -22.12 0.0114
2019-05-15 2019-03-31 13F F5 NETWORKS COM 315616102 28,685 12,287 74.93 4,485 49.30 0.0151
2019-02-13 2018-12-31 13F F5 NETWORKS COM 315616102 16,398 5,013 44.03 3,004 31.52 0.0107
2018-11-08 2018-09-30 13F F5 NETWORKS COM 315616102 11,385 8,018 238.13 2,284 293.12 0.0083
2018-08-03 2018-06-30 13F F5 NETWORKS COM 315616102 3,367 -207 -5.79 581 12.60 0.0020
2018-05-11 2018-03-31 13F F5 NETWORKS COM 315616102 3,574 -11,460 -76.23 516 -73.85 0.0020
2018-02-08 2017-12-31 13F F5 NETWORKS COM 315616102 15,034 2,669 21.59 1,973 32.33 0.0069
2017-11-06 2017-09-30 13F F5 NETWORKS COM 315616102 12,365 3,280 36.10 1,491 29.20 0.0053
2017-07-31 2017-06-30 13F F5 NETWORKS COM 315616102 9,085 230 2.60 1,154 -8.56 0.0046
2017-05-05 2017-03-31 13F F5 NETWORKS COM 315616102 8,855 2,858 47.66 1,262 45.39 0.0055
2017-02-02 2016-12-31 13F F5 NETWORKS COM 315616102 5,997 4,566 319.08 868 387.64 0.0042
2016-11-04 2016-09-30 13F F5 NETWORKS COM 315616102 1,431 308 27.43 178 40.16 0.0009
2016-08-11 2016-06-30 13F F5 NETWORKS COM 315616102 1,123 -5,460 -82.94 127 -81.78 0.0008
2016-05-10 2016-03-31 13F/A-1 F5 NETWORKS COM 315616102 6,583 -11,598 -63.79 697 -60.44 0.0043
2016-02-03 2015-12-31 13F F5 NETWORKS COM 315616102 18,181 -6,611 -26.67 1,762 -38.63 0.0107
2015-11-02 2015-09-30 13F/A-1 F5 NETWORKS COM 315616102 24,792 4,400 21.58 2,871 16.99 0.0264
2015-10-30 2015-09-30 13F F5 NETWORKS COM 315616102 24,792 2,872
2015-08-07 2015-06-30 13F/A-1 F5 NETWORKS COM 315616102 20,392 -12,959 -38.86 2,454 -35.94 0.0222
2015-08-04 2015-06-30 13F F5 NETWORKS COM 315616102 20,392 -12,959 2,454 0.0222
2015-05-14 2015-03-31 13F/A-1 F5 NETWORKS COM 315616102 33,351 11,065 49.65 3,831 31.69 0.0333
2015-05-01 2015-03-31 13F FELCOR LODGING TR PUT 315616102 33,351 33,351 3,831 0.0333
2015-02-10 2014-12-31 13F F5 NETWORKS COM 315616102 22,286 22,286 2,909 0.0257
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-05-01 2015-03-31 13F FELCOR LODGING TR PUT 33,351 3,831 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.