Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership842,825 shares
Latest Disclosed Value $ 66,928,733
Alliancebernstein L.p. reports 20.12% increase in ownership of FTNT / Fortinet, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 842,825 shares of Fortinet, Inc. (MX:FTNT) valued at $66,928,733 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 701,654 shares of Fortinet, Inc.. This represents a change in shares of 20.12% during the quarter.

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)
2026-05-15 2026-03-31 13F FORTINET COM 34959E109 842,825 141,171 20.12 66,929 20.12 0.0217
2026-02-17 2025-12-31 13F FORTINET COM 34959E109 701,654 -3,294 -0.47 55,718 -6.00 0.0176
2025-11-14 2025-09-30 13F FORTINET COM 34959E109 704,948 -87,716 -11.07 59,272 -29.27 0.0187
2025-08-14 2025-06-30 13F FORTINET COM 34959E109 792,664 -231,255 -22.59 83,800 -14.98 0.0273
2025-05-15 2025-03-31 13F FORTINET COM 34959E109 1,023,919 34,202 3.46 98,562 5.40 0.0357
2025-02-12 2024-12-31 13F FORTINET COM 34959E109 989,717 -72,200 -6.80 93,508 13.55 0.0317
2024-11-14 2024-09-30 13F FORTINET COM 34959E109 1,061,917 129,858 13.93 82,352 46.60 0.0277
2024-08-14 2024-06-30 13F FORTINET COM 34959E109 932,059 -12,695,954 -93.16 56,175 -93.97 0.0196
2024-05-14 2024-03-31 13F FORTINET COM 34959E109 13,628,013 -12,285,291 -47.41 930,930 -38.62 0.3294
2024-02-14 2023-12-31 13F FORTINET COM 34959E109 25,913,304 -3,221,587 -11.06 1,516,706 -11.28 0.5836
2023-11-14 2023-09-30 13F FORTINET COM 34959E109 29,134,891 275,834 0.96 1,709,635 -21.63 0.7272
2023-08-15 2023-06-30 13F FORTINET COM 34959E109 28,859,057 595,952 2.11 2,181,456 16.14 0.8903
2023-05-15 2023-03-31 13F FORTINET COM 34959E109 28,263,105 1,655,428 6.22 1,878,366 44.40 0.8048
2023-02-15 2022-12-31 13F FORTINET COM 34959E109 26,607,677 3,467,035 14.98 1,300,849 14.42 0.5854
2022-11-15 2022-09-30 13F FORTINET COM 34959E109 23,140,642 3,403,145 17.24 1,136,900 1.80 0.5504
2022-08-15 2022-06-30 13F FORTINET COM 34959E109 19,737,497 16,821,257 576.81 1,116,748 12.06 0.5101
2022-05-13 2022-03-31 13F FORTINET COM 34959E109 2,916,240 378,096 14.90 996,596 9.25 0.3846
2022-02-14 2021-12-31 13F FORTINET COM 34959E109 2,538,144 -405,445 -13.77 912,209 6.11 0.3225
2021-11-10 2021-09-30 13F FORTINET COM 34959E109 2,943,589 -746,177 -20.22 859,646 -2.19 0.3391
2021-07-30 2021-06-30 13F FORTINET COM 34959E109 3,689,766 -265,942 -6.72 878,865 20.47 0.3528
2021-05-06 2021-03-31 13F FORTINET COM 34959E109 3,955,708 -671,104 -14.50 729,512 6.15 0.3199
2021-02-08 2020-12-31 13F FORTINET COM 34959E109 4,626,812 727,949 18.67 687,220 49.62 0.3243
2020-11-12 2020-09-30 13F FORTINET COM 34959E109 3,898,863 3,318,018 571.24 459,325 476.08 0.2472
2020-08-13 2020-06-30 13F FORTINET COM 34959E109 580,845 344,219 145.47 79,733 233.07 0.0469
2020-05-14 2020-03-31 13F FORTINET COM 34959E109 236,626 5,420 2.34 23,939 -3.02 0.0172
2020-02-18 2019-12-31 13F FORTINET COM 34959E109 231,206 -17,017 -6.86 24,684 29.55 0.0140
2019-11-14 2019-09-30 13F FORTINET COM 34959E109 248,223 -7,074 -2.77 19,054 -2.86 0.0119
2019-08-14 2019-06-30 13F FORTINET COM 34959E109 255,297 -42,858 -14.37 19,614 -21.66 0.0122
2019-05-14 2019-03-31 13F FORTINET COM 34959E109 298,155 9,906 3.44 25,036 23.32 0.0163
2019-02-13 2018-12-31 13F FORTINET COM 34959E109 288,249 143,846 99.61 20,301 52.36 0.0151
2018-11-08 2018-09-30 13F FORTINET COM 34959E109 144,403 49,515 52.18 13,324 124.92 0.0087
2018-08-13 2018-06-30 13F FORTINET COM 34959E109 94,888 -23,726 -20.00 5,924 -6.78 0.0041
2018-05-14 2018-03-31 13F FORTINET COM 34959E109 118,614 21,832 22.56 6,355 50.31 0.0046
2018-02-13 2017-12-31 13F FORTINET COM 34959E109 96,782 -399,930 -80.52 4,228 -76.25 0.0030
2017-11-13 2017-09-30 13F FORTINET COM 34959E109 496,712 6,563 1.34 17,802 -2.99 0.0133
2017-08-10 2017-06-30 13F FORTINET COM 34959E109 490,149 -92,336 -15.85 18,351 -17.85 0.0142
2017-05-11 2017-03-31 13F FORTINET COM 34959E109 582,485 -21,493 -3.56 22,338 22.79 0.0178
2017-02-13 2016-12-31 13F FORTINET COM 34959E109 603,978 -2,882,988 -82.68 18,192 -85.87 0.0152
2016-11-10 2016-09-30 13F FORTINET COM 34959E109 3,486,966 -225,456 -6.07 128,774 9.81 0.1087
2016-08-11 2016-06-30 13F FORTINET COM 34959E109 3,712,422 -353,028 -8.68 117,275 -5.82 0.1010
2016-05-13 2016-03-31 13F FORTINET COM 34959E109 4,065,450 2,714,042 200.83 124,525 195.62 0.1058
2016-02-16 2015-12-31 13F/A-1 FORTINET COM 34959E109 1,351,408 -606,946 -30.99 42,123 -49.37 0.0358
2016-02-12 2015-12-31 13F FORTINET COM 34959E109 1,351,408 57,408
2015-11-13 2015-09-30 13F FORTINET COM 34959E109 1,958,354 -26,118 -1.32 83,191 1.43 0.0714
2015-08-14 2015-06-30 13F FORTINET COM 34959E109 1,984,472 -59,556 -2.91 82,018 14.81 0.0678
2015-05-13 2015-03-31 13F FORTINET COM 34959E109 2,044,028 -214,625 -9.50 71,439 3.16 0.0579
2015-02-13 2014-12-31 13F FORTINET COM 34959E109 2,258,653 -397,176 -14.95 69,250 3.20 0.0575
2014-11-13 2014-09-30 13F FORTINET COM 34959E109 2,655,829 -42,277 -1.57 67,100 -1.04 0.0565
2014-08-13 2014-06-30 13F FORTINET COM 34959E109 2,698,106 2,424,531 886.24 67,803 1,024.99 0.0571
2014-05-13 2014-03-31 13F FORTINET COM 34959E109 273,575 46,052 20.24 6,027 38.46 0.0052
2014-02-13 2013-12-31 13F FORTINET COM 34959E109 227,523 -13,297 -5.52 4,353 -10.78 0.0039
2013-11-14 2013-09-30 13F FORTINET COM 34959E109 240,820 -22,410 -8.51 4,879 5.90 0.0048
2013-08-13 2013-06-30 13F FORTINET COM 34959E109 263,230 263,230 4,607 0.0049
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.