Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionKing Luther Capital Management Corp
Latest Disclosed Ownership751,418 shares
Latest Disclosed Value $ 61,405,879
King Luther Capital Management Corp reports 13.10% increase in ownership of FTNT / Fortinet, Inc.

On May 8, 2026 - King Luther Capital Management Corp filed a 13F-HR form disclosing ownership of 751,418 shares of Fortinet, Inc. (MX:FTNT) valued at $61,405,879 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 664,371 shares of Fortinet, Inc.. This represents a change in shares of 13.10% 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)
2026-05-08 2026-03-31 13F FORTINET COM 34959E109 751,418 87,047 13.10 61,406 16.39 0.2653
2026-02-09 2025-12-31 13F FORTINET COM 34959E109 664,371 -7,273 -1.08 52,758 -6.58 0.2146
2025-11-07 2025-09-30 13F FORTINET COM 34959E109 671,644 344,335 105.20 56,472 63.20 0.2326
2025-08-07 2025-06-30 13F FORTINET COM 34959E109 327,309 8,207 2.57 34,603 12.65 0.1502
2025-05-12 2025-03-31 13F FORTINET COM 34959E109 319,102 -4,173 -1.29 30,717 0.57 0.1418
2025-02-07 2024-12-31 13F FORTINET COM 34959E109 323,275 -4,883 -1.49 30,543 20.02 0.1322
2024-11-08 2024-09-30 13F FORTINET COM 34959E109 328,158 -102,961 -23.88 25,449 -2.06 0.1092
2024-08-12 2024-06-30 13F FORTINET COM 34959E109 431,119 32,273 8.09 25,984 -4.63 0.1171
2024-05-14 2024-03-31 13F FORTINET COM 34959E109 398,846 32,686 8.93 27,245 27.13 0.1229
2024-02-09 2023-12-31 13F FORTINET COM 34959E109 366,160 -93,146 -20.28 21,431 -20.48 0.1030
2023-11-13 2023-09-30 13F FORTINET COM 34959E109 459,306 62,717 15.81 26,952 -10.09 0.1399
2023-08-10 2023-06-30 13F FORTINET COM 34959E109 396,589 102,883 35.03 29,978 53.58 0.1490
2023-05-11 2023-03-31 13F FORTINET COM 34959E109 293,706 1,600 0.55 19,520 36.68 0.1031
2023-02-13 2022-12-31 13F FORTINET COM 34959E109 292,106 -9,399 -3.12 14,281 -3.59 0.0783
2022-11-10 2022-09-30 13F FORTINET COM 34959E109 301,505 4,945 1.67 14,813 -11.72 0.0884
2022-08-11 2022-06-30 13F FORTINET COM 34959E109 296,560 239,350 418.37 16,779 -14.18 0.0939
2022-05-11 2022-03-31 13F FORTINET COM 34959E109 57,210 -4,058 -6.62 19,551 -11.21 0.0954
2022-02-14 2021-12-31 13F FORTINET COM 34959E109 61,268 -850 -1.37 22,020 21.38 0.0996
2021-11-10 2021-09-30 13F FORTINET COM 34959E109 62,118 -24,465 -28.26 18,141 -12.04 0.0892
2021-08-13 2021-06-30 13F FORTINET COM 34959E109 86,583 706 0.82 20,623 30.22 0.1008
2021-05-12 2021-03-31 13F FORTINET COM 34959E109 85,877 6,195 7.77 15,837 33.81 0.0850
2021-02-10 2020-12-31 13F FORTINET COM 34959E109 79,682 33,453 72.36 11,835 117.32 0.0666
2020-11-12 2020-09-30 13F FORTINET COM 34959E109 46,229 933 2.06 5,446 -12.42 0.0344
2020-08-12 2020-06-30 13F FORTINET COM 34959E109 45,296 55 0.12 6,218 35.85 0.0431
2020-05-13 2020-03-31 13F FORTINET COM 34959E109 45,241 8,058 21.67 4,577 15.29 0.0396
2020-02-12 2019-12-31 13F FORTINET COM 34959E109 37,183 -1,525 -3.94 3,970 33.63 0.0265
2019-11-12 2019-09-30 13F FORTINET COM 34959E109 38,708 -3,559 -8.42 2,971 -8.50 0.0216
2019-08-12 2019-06-30 13F FORTINET COM 34959E109 42,267 -2,715 -6.04 3,247 -14.03 0.0237
2019-05-10 2019-03-31 13F FORTINET COM 34959E109 44,982 1,030 2.34 3,777 22.00 0.0289
2019-02-12 2018-12-31 13F FORTINET COM 34959E109 43,952 31,445 251.42 3,096 168.28 0.0275
2018-11-13 2018-09-30 13F FORTINET COM 34959E109 12,507 -475 -3.66 1,154 42.47 0.0087
2018-08-13 2018-06-30 13F FORTINET COM 34959E109 12,982 -310 -2.33 810 13.76 0.0066
2018-05-08 2018-03-31 13F FORTINET COM 34959E109 13,292 -3,120 -19.01 712 -0.70 0.0060
2018-02-12 2017-12-31 13F FORTINET COM 34959E109 16,412 -12,515 -43.26 717 -30.86 0.0059
2017-11-13 2017-09-30 13F FORTINET COM 34959E109 28,927 -2,640 -8.36 1,037 -12.27 0.0091
2017-08-10 2017-06-30 13F FORTINET COM 34959E109 31,567 -2,560 -7.50 1,182 -9.70 0.0107
2017-05-12 2017-03-31 13F FORTINET COM 34959E109 34,127 -17,475 -33.86 1,309 -15.77 0.0120
2017-02-10 2016-12-31 13F FORTINET COM 34959E109 51,602 -60,200 -53.85 1,554 -62.36 0.0148
2016-11-10 2016-09-30 13F FORTINET COM 34959E109 111,802 -30,785 -21.59 4,129 -8.33 0.0403
2016-08-11 2016-06-30 13F FORTINET COM 34959E109 142,587 -35,163 -19.78 4,504 -17.27 0.0441
2016-05-12 2016-03-31 13F FORTINET COM 34959E109 177,750 -208,110 -53.93 5,444 -54.74 0.0541
2016-02-12 2015-12-31 13F/A-1 FORTINET COM 34959E109 385,860 36,435 10.43 12,027 -18.98 0.1128
2016-02-11 2015-12-31 13F FORTINET COM 34959E109 385,860 36,435 12,027 0.1128
2015-11-13 2015-09-30 13F FORTINET COM 34959E109 349,425 -13,995 -3.85 14,844 -1.17 0.1440
2015-08-11 2015-06-30 13F FORTINET COM 34959E109 363,420 -878,390 -70.73 15,020 -65.39 0.1296
2015-05-14 2015-03-31 13F FORTINET COM 34959E109 1,241,810 -377,725 -23.32 43,401 -12.59 0.3637
2015-02-11 2014-12-31 13F FORTINET COM 34959E109 1,619,535 1,598,055 7,439.73 49,655 10,397.89 0.4004
2014-05-14 2014-03-31 13F FORTINET COM 34959E109 21,480 0 0.00 473 15.09 0.0039
2014-02-12 2013-12-31 13F FORTINET COM 34959E109 21,480 -400 -1.83 411 -7.22 0.0033
2013-11-13 2013-09-30 13F FORTINET COM 34959E109 21,880 -5,900 -21.24 443 -8.85 0.0038
2013-08-13 2013-06-30 13F FORTINET COM 34959E109 27,780 27,780 486 0.0045
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.