Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionClearbridge Investments, LLC
Latest Disclosed Ownership474,705 shares
Latest Disclosed Value $ 38,792,893
Clearbridge Investments, LLC reports 33.01% decrease in ownership of FTNT / Fortinet, Inc.

On May 13, 2026 - Clearbridge Investments, LLC filed a 13F-HR form disclosing ownership of 474,705 shares of Fortinet, Inc. (MX:FTNT) valued at $38,792,893 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 708,668 shares of Fortinet, Inc.. This represents a change in shares of -33.01% 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)
2026-05-13 2026-03-31 13F Fortinet COM 34959E109 474,705 -233,963 -33.01 38,793 -31.07 0.0338
2026-02-11 2025-12-31 13F Fortinet COM 34959E109 708,668 -265,667 -27.27 56,275 -31.31 0.0451
2025-11-13 2025-09-30 13F Fortinet COM 34959E109 974,335 7,166 0.74 81,922 -19.88 0.0617
2025-08-12 2025-06-30 13F Fortinet COM 34959E109 967,169 -48,875 -4.81 102,249 4.54 0.0830
2025-05-13 2025-03-31 13F Fortinet COM 34959E109 1,016,044 -16,888 -1.63 97,804 0.22 0.0854
2025-02-12 2024-12-31 13F Fortinet COM 34959E109 1,032,932 -165,728 -13.83 97,591 4.99 0.0791
2024-11-12 2024-09-30 13F Fortinet COM 34959E109 1,198,660 -127,280 -9.60 92,956 16.32 0.0731
2024-08-27 2024-06-30 13F/A-1 Fortinet COM 34959E109 1,325,940 -57,229 -4.14 79,914 -15.42 0.0649
2024-08-14 2024-06-30 13F Fortinet COM 34959E109 1,325,940 -57,229 79,914 0.0654
2024-05-13 2024-03-31 13F Fortinet COM 34959E109 1,383,169 -1,956 -0.14 94,484 16.54 0.0749
2024-02-09 2023-12-31 13F Fortinet COM 34959E109 1,385,125 4,423 0.32 81,071 0.06 0.0697
2023-11-13 2023-09-30 13F Fortinet COM 34959E109 1,380,702 20,435 1.50 81,020 -21.20 0.0779
2023-08-11 2023-06-30 13F Fortinet COM 34959E109 1,360,267 136,630 11.17 102,823 26.44 0.0928
2023-05-12 2023-03-31 13F Fortinet COM 34959E109 1,223,637 -279,298 -18.58 81,323 10.68 0.0777
2023-02-10 2022-12-31 13F Fortinet COM 34959E109 1,502,935 9,642 0.65 73,478 0.15 0.0726
2022-11-14 2022-09-30 13F Fortinet COM 34959E109 1,493,293 77,489 5.47 73,365 -8.42 0.0740
2022-08-11 2022-06-30 13F Fortinet COM 34959E109 1,415,804 1,132,686 400.08 80,106 -17.21 0.0747
2022-05-13 2022-03-31 13F Fortinet COM 34959E109 283,118 -64,146 -18.47 96,753 -22.48 0.0727
2022-02-11 2021-12-31 13F Fortinet COM 34959E109 347,264 -8,472 -2.38 124,807 20.13 0.0850
2021-11-12 2021-09-30 13F Fortinet COM 34959E109 355,736 -167,986 -32.08 103,889 -16.72 0.0741
2021-08-13 2021-06-30 13F Fortinet COM 34959E109 523,722 -258,126 -33.01 124,745 -13.48 0.0868
2021-05-13 2021-03-31 13F Fortinet COM 34959E109 781,848 -88,459 -10.16 144,188 11.54 0.1075
2021-02-10 2020-12-31 13F Fortinet COM 34959E109 870,307 -26,473 -2.95 129,267 22.35 0.0998
2020-11-12 2020-09-30 13F Fortinet COM 34959E109 896,780 19,604 2.23 105,650 -12.26 0.0908
2020-08-14 2020-06-30 13F FORTINET COM 34959E109 877,176 -365,885 -29.43 120,410 -4.25 0.1087
2020-05-22 2020-03-31 13F/A-1 FORTINET COM 34959E109 1,243,061 -184,266 -12.91 125,760 -19.67 0.1363
2020-05-15 2020-03-31 13F FORTINET COM 34959E109 1,243,061 -184,266 125,760 136,327.3682
2020-02-14 2019-12-31 13F FORTINET COM 34959E109 1,427,327 30,510 2.18 156,549 46.01 0.1297
2019-11-14 2019-09-30 13F FORTINET COM 34959E109 1,396,817 -1,052,403 -42.97 107,220 -43.02 0.0936
2019-08-14 2019-06-30 13F FORTINET COM 34959E109 2,449,220 -107,201 -4.19 188,174 -12.34 0.1631
2019-05-15 2019-03-31 13F FORTINET COM 34959E109 2,556,421 -262,989 -9.33 214,663 8.10 0.1897
2019-02-14 2018-12-31 13F FORTINET COM 34959E109 2,819,410 -220,136 -7.24 198,571 -29.20 0.2009
2018-11-28 2018-09-30 13F/A-1 FORTINET COM 34959E109 3,039,546 -24,321 -0.79 280,459 46.62 0.2414
2018-11-14 2018-09-30 13F FORTINET COM 34959E109 3,039,546 -24,321 280,459
2018-08-14 2018-06-30 13F FORTINET COM 34959E109 3,063,867 -741,135 -19.48 191,277 -6.18 0.1566
2018-05-15 2018-03-31 13F FORTINET COM 34959E109 3,805,002 19,369 0.51 203,872 23.26 0.1924
2018-02-14 2017-12-31 13F FORTINET COM 34959E109 3,785,633 24,088 0.64 165,394 22.68 0.1528
2017-11-14 2017-09-30 13F FORTINET COM 34959E109 3,761,545 -96,870 -2.51 134,814 -6.68 0.1297
2017-08-14 2017-06-30 13F FORTINET COM 34959E109 3,858,415 -4,583,368 -54.29 144,459 -55.38 0.1420
2017-06-07 2017-03-31 13F/A-1 FORTINET COM 34959E109 8,441,783 1,831,096 27.70 323,742 62.59 0.3257
2017-05-15 2017-03-31 13F FORTINET COM 34959E109 8,441,783 323,742
2017-02-14 2016-12-31 13F FORTINET COM 34959E109 6,610,687 1,182,513 21.78 199,114 -0.67 0.2189
2016-11-14 2016-09-30 13F FORTINET COM 34959E109 5,428,174 243,431 4.70 200,462 22.39 0.2257
2016-08-15 2016-06-30 13F FORTINET COM 34959E109 5,184,743 2,440,185 88.91 163,786 94.83 0.1935
2016-05-16 2016-03-31 13F FORTINET COM 34959E109 2,744,558 115,199 4.38 84,066 2.57 0.1004
2016-02-16 2015-12-31 13F FORTINET COM 34959E109 2,629,359 126,393 5.05 81,957 -22.92 0.0949
2015-11-16 2015-09-30 13F FORTINET COM 34959E109 2,502,966 -642,815 -20.43 106,326 -18.22 0.1273
2015-08-17 2015-06-30 13F/A-1 FORTINET COM 34959E109 3,145,781 -536,815 -14.58 130,015 1.02 0.1375
2015-08-14 2015-06-30 13F FORTINET COM 34959E109 3,145,781 130,015
2015-05-15 2015-03-31 13F FORTINET COM 34959E109 3,682,596 -494,412 -11.84 128,707 0.50 0.1336
2015-02-17 2014-12-31 13F FORTINET COM 34959E109 4,177,008 -304,860 -6.80 128,067 13.10 0.1347
2014-11-14 2014-09-30 13F FORTINET COM 34959E109 4,481,868 -9,244 -0.21 113,234 0.33 0.1247
2014-08-14 2014-06-30 13F FORTINET COM 34959E109 4,491,112 -52,033 -1.15 112,862 12.77 0.1269
2014-05-15 2014-03-31 13F FORTINET COM 34959E109 4,543,145 244,865 5.70 100,085 21.72 0.1188
2014-02-14 2013-12-31 13F FORTINET COM 34959E109 4,298,280 1,350,929 45.84 82,226 37.70 0.1025
2013-11-14 2013-09-30 13F FORTINET COM 34959E109 2,947,351 1,126,635 61.88 59,713 87.41 0.0834
2013-08-14 2013-06-30 13F FORTINET COM 34959E109 1,820,716 1,820,716 31,863 0.0486
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.