Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionTower Research Capital LLC (TRC)
Latest Disclosed Ownership58,290 shares
Latest Disclosed Value $ 4,763,459
Tower Research Capital LLC (TRC) reports 10.94% increase in ownership of FTNT / Fortinet, Inc.

On May 15, 2026 - Tower Research Capital LLC (TRC) filed a 13F-HR form disclosing ownership of 58,290 shares of Fortinet, Inc. (MX:FTNT) valued at $4,763,459 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 52,544 shares of Fortinet, Inc.. This represents a change in shares of 10.94% 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 58,290 5,746 10.94 4,763 14.17 0.0817
2026-02-17 2025-12-31 13F FORTINET COM 34959E109 52,544 40,704 343.78 4,173 319.30 0.1010
2025-11-14 2025-09-30 13F FORTINET COM 34959E109 11,840 -876 -6.89 996 -25.97 0.0275
2025-08-15 2025-06-30 13F FORTINET COM 34959E109 12,716 -6,394 -33.46 1,344 -26.92 0.0363
2025-05-15 2025-03-31 13F FORTINET COM 34959E109 19,110 -44,042 -69.74 1,840 -69.18 0.0548
2025-02-13 2024-12-31 13F FORTINET COM 34959E109 63,152 34,763 122.45 5,967 171.06 0.1184
2024-11-14 2024-09-30 13F FORTINET COM 34959E109 28,389 -60,680 -68.13 2,202 -59.00 0.0583
2024-08-13 2024-06-30 13F FORTINET COM 34959E109 89,069 25,648 40.44 5,368 23.92 0.0906
2024-05-15 2024-03-31 13F FORTINET COM 34959E109 63,421 -52,246 -45.17 4,332 -36.00 0.1043
2024-02-13 2023-12-31 13F FORTINET COM 34959E109 115,667 50,139 76.52 6,770 76.05 0.0836
2023-11-14 2023-09-30 13F FORTINET COM 34959E109 65,528 28,504 76.99 3,845 37.42 0.1203
2023-08-14 2023-06-30 13F FORTINET COM 34959E109 37,024 21,284 135.22 2,799 279,700.00 0.0932
2023-05-09 2023-03-31 13F FORTINET COM 34959E109 15,740 -5,037 -24.24 1 0.00 0.0333
2023-02-10 2022-12-31 13F FORTINET COM 34959E109 20,777 -152,569 -88.01 1 -99.99 0.0421
2022-11-10 2022-09-30 13F FORTINET COM 34959E109 173,346 74,957 76.18 8,516 52.97 0.1382
2022-08-15 2022-06-30 13F FORTINET COM 34959E109 98,389 41,449 72.79 5,567 -71.39 0.1248
2022-05-12 2022-03-31 13F FORTINET COM 34959E109 56,940 33,973 147.92 19,458 135.71 0.1860
2022-02-14 2021-12-31 13F FORTINET COM 34959E109 22,967 20,247 744.38 8,255 938.36 0.1428
2021-11-15 2021-09-30 13F FORTINET COM 34959E109 2,720 -6,754 -71.29 795 -64.76 0.0203
2021-08-16 2021-06-30 13F FORTINET COM 34959E109 9,474 -12,657 -57.19 2,256 -44.72 0.0587
2021-05-17 2021-03-31 13F FORTINET COM 34959E109 22,131 18,575 522.36 4,081 672.92 0.0687
2021-02-16 2020-12-31 13F FORTINET COM 34959E109 3,556 1,036 41.11 528 77.78 0.0161
2020-11-16 2020-09-30 13F FORTINET COM 34959E109 2,520 1,303 107.07 297 77.84 0.0033
2020-08-13 2020-06-30 13F FORTINET COM 34959E109 1,217 1,217 167 0.0069
2020-05-15 2020-03-31 13F FORTINET COM 34959E109 0 -6 -100.00 0 -100.00
2020-02-07 2019-12-31 13F FORTINET COM 34959E109 6 -3,997 -99.85 1 -99.68 0.0001
2019-11-05 2019-09-30 13F FORTINET COM 34959E109 4,003 3,919 4,665.48 308 5,033.33 0.0211
2019-08-13 2019-06-30 13F FORTINET COM 34959E109 84 -4,404 -98.13 6 -98.41 0.0004
2019-05-14 2019-03-31 13F FORTINET COM 34959E109 4,488 -2,561 -36.33 377 -23.99 0.0229
2019-02-14 2018-12-31 13F FORTINET COM 34959E109 7,049 -300 -4.08 496 -26.84 0.0358
2018-11-13 2018-09-30 13F FORTINET COM 34959E109 7,349 5,736 355.61 678 571.29 0.0497
2018-08-14 2018-06-30 13F FORTINET COM 34959E109 1,613 -12,820 -88.82 101 -86.95 0.0057
2018-05-15 2018-03-31 13F FORTINET COM 34959E109 14,433 12,586 681.43 774 867.50 0.0663
2018-02-09 2017-12-31 13F FORTINET COM 34959E109 1,847 1,847 80 0.0103
2017-11-14 2017-09-30 13F FORTINET COM 34959E109 0 -108 -100.00 0 -100.00
2017-08-14 2017-06-30 13F FORTINET COM 34959E109 108 108 4 0.0005
2017-05-19 2017-03-31 13F FORTINET COM 34959E109 0 -1,717 -100.00 0 -100.00
2017-02-03 2016-12-31 13F FORTINET COM 34959E109 1,717 -2,526 -59.53 52 -66.88 0.0056
2016-11-08 2016-09-30 13F FORTINET COM 34959E109 4,243 -2,221 -34.36 157 -23.04 0.0156
2016-08-10 2016-06-30 13F FORTINET COM 34959E109 6,464 4,153 179.71 204 187.32 0.0195
2016-05-16 2016-03-31 13F FORTINET COM 34959E109 2,311 1,494 182.86 71 184.00 0.0106
2016-02-10 2015-12-31 13F FORTINET COM 34959E109 817 -8,949 -91.63 25 -93.98 0.0041
2015-11-13 2015-09-30 13F FORTINET COM 34959E109 9,766 9,766 0.00 415 0.0403
2015-07-30 2015-06-30 13F FORTINET COM 34959E109 0 -250 -100.00 0 -100.00
2015-05-12 2015-03-31 13F FORTINET COM 34959E109 250 250 0.00 9 0.0011
2015-02-05 2014-12-31 13F FORTINET COM 34959E109 0 -5,200 -100.00 0 -100.00
2014-10-31 2014-09-30 13F FORTINET COM 34959E109 5,200 -1,704 -24.68 131 -24.28 0.0147
2014-08-14 2014-06-30 13F FORTINET COM 34959E109 6,904 -11,363 -62.21 173 -56.97 0.0222
2014-05-02 2014-03-31 13F FORTINET COM 34959E109 18,267 15,513 563.29 402 658.49 0.0515
2014-01-31 2013-12-31 13F FORTINET COM 34959E109 2,754 -273 -9.02 53 -13.11 0.0088
2013-11-06 2013-09-30 13F FORTINET COM 34959E109 3,027 3,027 61 0.0066
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.