Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership6,221,836 shares
Latest Disclosed Value $ 508,448,438
Northern Trust Corp reports 2.27% decrease in ownership of FTNT / Fortinet, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 6,221,836 shares of Fortinet, Inc. (MX:FTNT) valued at $508,448,438 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,366,265 shares of Fortinet, Inc.. This represents a change in shares of -2.27% 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)
2026-05-14 2026-03-31 13F FORTINET COM 34959E109 6,221,836 -144,429 -2.27 508,448 0.57 0.0138
2026-02-17 2025-12-31 13F FORTINET COM 34959E109 6,366,265 -447,980 -6.57 505,545 -11.76 0.0645
2025-11-14 2025-09-30 13F FORTINET COM 34959E109 6,814,245 -102,267 -1.48 572,942 -21.65 0.0733
2025-08-13 2025-06-30 13F FORTINET COM 34959E109 6,916,512 396,954 6.09 731,214 16.51 0.1006
2025-05-13 2025-03-31 13F FORTINET COM 34959E109 6,519,558 49,238 0.76 627,573 2.66 0.0932
2025-02-14 2024-12-31 13F FORTINET COM 34959E109 6,470,320 951,233 17.24 611,316 42.83 0.0866
2024-11-13 2024-09-30 13F FORTINET COM 34959E109 5,519,087 -242,184 -4.20 428,005 23.26 0.0701
2024-08-14 2024-06-30 13F FORTINET COM 34959E109 5,761,271 -261,401 -4.34 347,232 -15.60 0.0585
2024-05-14 2024-03-31 13F FORTINET COM 34959E109 6,022,672 -283,533 -4.50 411,409 11.46 0.0711
2024-02-13 2023-12-31 13F FORTINET COM 34959E109 6,306,205 -203,673 -3.13 369,102 -3.38 0.0668
2023-11-13 2023-09-30 13F FORTINET COM 34959E109 6,509,878 10,018 0.15 382,000 -22.25 0.0740
2023-08-11 2023-06-30 13F FORTINET COM 34959E109 6,499,860 -211,060 -3.15 491,324 10.16 0.0944
2023-05-15 2023-03-31 13F FORTINET COM 34959E109 6,710,920 103,150 1.56 446,008 38.06 0.0884
2023-02-13 2022-12-31 13F FORTINET COM 34959E109 6,607,770 -155,650 -2.30 323,054 -2.78 0.0678
2022-11-14 2022-09-30 13F FORTINET COM 34959E109 6,763,420 -47,769 -0.70 332,288 -13.78 0.0759
2022-08-12 2022-06-30 13F FORTINET COM 34959E109 6,811,189 5,343,055 363.94 385,377 -23.19 0.0825
2022-05-13 2022-03-31 13F FORTINET COM 34959E109 1,468,134 -18,132 -1.22 501,720 -6.07 0.0883
2022-02-08 2021-12-31 13F FORTINET COM 34959E109 1,486,266 -8,840 -0.59 534,164 22.34 0.0875
2021-11-15 2021-09-30 13F FORTINET COM 34959E109 1,495,106 32,494 2.22 436,630 25.33 0.0773
2021-08-13 2021-06-30 13F FORTINET COM 34959E109 1,462,612 -21,170 -1.43 348,380 27.31 0.0614
2021-05-12 2021-03-31 13F FORTINET COM 34959E109 1,483,782 -19,548 -1.30 273,640 22.55 0.0509
2021-02-11 2020-12-31 13F FORTINET COM 34959E109 1,503,330 -47,011 -3.03 223,289 22.25 0.0435
2020-11-16 2020-09-30 13F FORTINET COM 34959E109 1,550,341 -33,674 -2.13 182,646 -16.00 0.0401
2020-08-14 2020-06-30 13F FORTINET COM 34959E109 1,584,015 -87,314 -5.22 217,438 28.59 0.0515
2020-05-14 2020-03-31 13F FORTINET COM 34959E109 1,671,329 10,207 0.61 169,088 -4.65 0.0485
2020-02-14 2019-12-31 13F FORTINET COM 34959E109 1,661,122 -40,188 -2.36 177,341 35.80 0.0397
2019-11-13 2019-09-30 13F FORTINET COM 34959E109 1,701,310 -28,398 -1.64 130,592 -1.73 0.0313
2019-08-13 2019-06-30 13F FORTINET COM 34959E109 1,729,708 117,736 7.30 132,893 -1.82 0.0315
2019-05-13 2019-03-31 13F FORTINET COM 34959E109 1,611,972 45,720 2.92 135,358 22.71 0.0334
2019-02-12 2018-12-31 13F FORTINET COM 34959E109 1,566,252 193,805 14.12 110,311 -12.89 0.0309
2018-11-14 2018-09-30 13F FORTINET COM 34959E109 1,372,447 105,270 8.31 126,636 60.08 0.0310
2018-09-18 2018-06-30 13F/A-1 FORTINET COM 34959E109 1,267,177 6,078 0.48 79,110 17.08 0.0201
2018-08-14 2018-06-30 13F FORTINET COM 34959E109 1,278,141 17,042 79,794
2018-05-09 2018-03-31 13F FORTINET COM 34959E109 1,261,099 -5,126 -0.40 67,569 22.14 0.0176
2018-02-14 2017-12-31 13F FORTINET COM 34959E109 1,266,225 -77,150 -5.74 55,322 14.90 0.0140
2017-11-13 2017-09-30 13F FORTINET COM 34959E109 1,343,375 -16,089 -1.18 48,146 -5.41 0.0125
2017-08-11 2017-06-30 13F FORTINET COM 34959E109 1,359,464 11,971 0.89 50,899 -1.51 0.0142
2017-05-12 2017-03-31 13F FORTINET COM 34959E109 1,347,493 -13,329 -0.98 51,677 26.08 0.0149
2017-02-13 2016-12-31 13F FORTINET COM 34959E109 1,360,822 -81,657 -5.66 40,987 -23.06 0.0126
2016-11-09 2016-09-30 13F FORTINET COM 34959E109 1,442,479 30,355 2.15 53,270 19.42 0.0166
2016-08-12 2016-06-30 13F FORTINET COM 34959E109 1,412,124 62,191 4.61 44,607 3.99 0.0145
2016-08-19 2016-03-31 13F/A-1 FORTINET COM 34959E109 1,349,933 43,443 3.33 42,897 5.34 0.0142
2016-05-13 2016-03-31 13F Fortinet COMM 34959E109 1,349,924 41,348
2016-02-12 2015-12-31 13F Fortinet COMM 34959E109 1,306,490 -27,494 -2.06 40,724 -28.14 0.0135
2015-11-12 2015-09-30 13F Fortinet COMM 34959E109 1,333,984 192,448 16.86 56,668 20.11 0.0189
2015-08-13 2015-06-30 13F FORTINET COM 34959E109 1,141,536 -182,613 -13.79 47,180 1.95 0.0320
2015-08-13 2015-06-30 13F Fortinet COMM 034959E10 218,944 -1,105,205 9,049 0.0061
2015-05-14 2015-03-31 13F Fortinet COMM 34959E109 1,324,149 99,990 8.17 46,278 23.30 0.0139
2015-02-12 2014-12-31 13F Fortinet COM 34959E109 1,224,159 127,677 11.64 37,533 35.49 0.0113
2014-11-13 2014-09-30 13F Fortinet COMM 34959E109 1,096,482 -20,091 -1.80 27,702 -1.27 0.0087
2014-08-14 2014-06-30 13F FORTINET com 34959E109 1,116,573 87,713 8.53 28,059 23.79 0.0087
2014-05-14 2014-03-31 13F FORTINET COMM 34959E109 1,028,860 451,593 78.23 22,666 105.25 0.0071
2014-02-21 2013-12-31 13F/A-1 FORTINET COM 34959E109 577,267 -97,862 -14.50 11,043 -19.26 0.0035
2014-02-12 2013-12-31 13F FORTINET COM 34959E109 577,267 11,043
2013-11-13 2013-09-30 13F FORTINET COM 34959E109 675,129 10,049 1.51 13,678 17.52 0.0048
2013-08-09 2013-06-30 13F FORTINET COM 34959E109 665,080 665,080 11,639 0.0042
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.