Fortinet, Inc.
US ˙ NasdaqGS ˙ US34959E1091

SecurityFTNT / Fortinet, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership713,447 shares
Latest Disclosed Value $ 58,302,886
Stifel Financial Corp reports 12.39% decrease in ownership of FTNT / Fortinet, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 713,447 shares of Fortinet, Inc. (US:FTNT) valued at $58,302,889 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 814,317 shares of Fortinet, Inc.. This represents a change in shares of -12.39% during the quarter. The current value of the position is $106,781,612 USD.

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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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)
2026-05-12 2026-03-31 13F FORTINET COM 34959E109 713,447 -100,870 -12.39 58,303 -9.84 0.0536
2026-02-13 2025-12-31 13F FORTINET COM 34959E109 814,317 -36,820 -4.33 64,665 -9.64 0.0582
2025-11-12 2025-09-30 13F FORTINET COM 34959E109 851,137 -1,581 -0.19 71,564 -20.62 0.0653
2025-08-14 2025-06-30 13F FORTINET COM 34959E109 852,718 -7,583 -0.88 90,149 8.86 0.0877
2025-05-14 2025-03-31 13F FORTINET COM 34959E109 860,301 -19,887 -2.26 82,813 -0.42 0.0880
2025-02-13 2024-12-31 13F FORTINET COM 34959E109 880,188 9,573 1.10 83,160 23.17 0.0866
2024-11-14 2024-09-30 13F FORTINET COM 34959E109 870,615 -35,009 -3.87 67,516 23.70 0.0708
2024-08-13 2024-06-30 13F FORTINET COM 34959E109 905,624 -40,271 -4.26 54,582 -15.53 0.0614
2024-05-14 2024-03-31 13F FORTINET COM 34959E109 945,895 2,998 0.32 64,614 17.08 0.0736
2024-02-12 2023-12-31 13F FORTINET COM 34959E109 942,897 -109,897 -10.44 55,188 -10.67 0.0694
2023-11-13 2023-09-30 13F FORTINET COM 34959E109 1,052,794 -120,367 -10.26 61,778 -30.34 0.0868
2023-08-14 2023-06-30 13F FORTINET COM 34959E109 1,173,161 116,812 11.06 88,679 26.32 0.1213
2023-05-12 2023-03-31 13F FORTINET COM 34959E109 1,056,349 -27,130 -2.50 70,205 32.53 0.1006
2023-02-13 2022-12-31 13F FORTINET COM 34959E109 1,083,479 -39,383 -3.51 52,971 -3.98 0.0795
2022-11-14 2022-09-30 13F FORTINET COM 34959E109 1,122,862 -77,200 -6.43 55,165 -18.76 0.0903
2022-08-15 2022-06-30 13F FORTINET COM 34959E109 1,200,062 957,597 394.94 67,900 -18.05 0.1063
2022-05-13 2022-03-31 13F FORTINET COM 34959E109 242,465 -6,831 -2.74 82,860 -7.52 0.1131
2022-02-14 2021-12-31 13F FORTINET COM 34959E109 249,296 433 0.17 89,598 23.28 0.1184
2021-11-15 2021-09-30 13F FORTINET COM 34959E109 248,863 -22,979 -8.45 72,677 12.24 0.1066
2021-08-13 2021-06-30 13F FORTINET COM 34959E109 271,842 -150,068 -35.57 64,750 -16.78 0.0969
2021-05-14 2021-03-31 13F FORTINET COM 34959E109 421,910 11,523 2.81 77,809 27.65 0.1283
2021-02-12 2020-12-31 13F FORTINET COM 34959E109 410,387 23,688 6.13 60,954 33.80 0.1088
2020-11-16 2020-09-30 13F FORTINET COM 34959E109 386,699 77,011 24.87 45,557 7.17 0.0937
2020-08-14 2020-06-30 13F FORTINET COM 34959E109 309,688 204,858 195.42 42,511 300.93 0.0978
2020-05-14 2020-03-31 13F FORTINET COM 34959E109 104,830 79,481 313.55 10,603 292.85 0.0293
2020-02-13 2019-12-31 13F FORTINET COM 34959E109 25,349 2,598 11.42 2,699 53.79 0.0056
2019-11-19 2019-09-30 13F/A-1 FORTINET COM 34959E109 22,751 -12,297 -35.09 1,755 -34.83 0.0045
2019-11-13 2019-09-30 13F FORTINET COM 34959E109 22,801 -12,247 1,759 986.0077
2019-08-14 2019-06-30 13F FORTINET COM 34959E109 35,048 5,814 19.89 2,693 9.65 0.0069
2019-05-14 2019-03-31 13F FORTINET COM 34959E109 29,234 3,224 12.40 2,456 34.28 0.0069
2019-02-13 2018-12-31 13F FORTINET COM 34959E109 26,010 -3,221 -11.02 1,829 -32.26 0.0059
2018-11-13 2018-09-30 13F FORTINET COM 34959E109 29,231 2,061 7.59 2,700 60.05 0.0077
2018-08-14 2018-06-30 13F FORTINET COM 34959E109 27,170 609 2.29 1,687 18.39 0.0052
2018-05-11 2018-03-31 13F FORTINET COM 34959E109 26,561 395 1.51 1,425 24.67 0.0045
2018-02-14 2017-12-31 13F FORTINET COM 34959E109 26,166 -316 -1.19 1,143 20.82 0.0036
2017-11-13 2017-09-30 13F FORTINET COM 34959E109 26,482 -114 -0.43 946 -4.64 0.0033
2017-08-14 2017-06-30 13F FORTINET COM 34959E109 26,596 -23,283 -46.68 992 -48.57 0.0037
2017-05-10 2017-03-31 13F FORTINET COM 34959E109 49,879 5,214 11.67 1,929 42.57 0.0075
2017-02-16 2016-12-31 13F FORTINET COM 34959E109 44,665 6,110 15.85 1,353 -5.32 0.0057
2016-11-15 2016-09-30 13F FORTINET COM 34959E109 38,555 12,951 50.58 1,429 76.42 0.0064
2016-08-17 2016-06-30 13F FORTINET COM 34959E109 25,604 969 3.93 810 7.43 0.0037
2016-05-16 2016-03-31 13F FORTINET COM 34959E109 24,635 -1,441 -5.53 754 -7.14 0.0040
2016-03-21 2015-12-31 13F/A-2 FORTINET COM 34959E109 26,076 -7,675 -22.74 812 -43.34 0.0042
2016-02-26 2015-12-31 13F/A-1 FORTINET COM 34959E109 26,056 -20 812 0.0042
2016-02-16 2015-12-31 13F FORTINET COM 34959E109 25,729 802
2015-11-16 2015-09-30 13F FORTINET COM 34959E109 33,751 -11,727 -25.79 1,433 -23.74 0.0081
2015-08-17 2015-06-30 13F/A-1 FORTINET COM 34959E109 45,478 16,908 59.18 1,879 88.28 0.0097
2015-08-17 2015-06-30 13F FORTINET COM 34959E109 45,380 1,876
2015-05-14 2015-03-31 13F FORTINET COM 34959E109 28,570 12,043 72.87 998 97.23 0.0055
2015-02-13 2014-12-31 13F FORTINET COM 34959E109 16,527 -3,943 -19.26 506 -1.94 0.0028
2014-11-13 2014-09-30 13F FORTINET COM 34959E109 20,470 -24,654 -54.64 516 -54.50 0.0045
2014-08-14 2014-06-30 13F FORTINET COM 34959E109 45,124 -1,887 -4.01 1,134 9.46 0.0102
2014-05-15 2014-03-31 13F FORTINET COM 34959E109 47,011 47,011 1,036 0.0099
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.