Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership26,987 shares
Latest Disclosed Value $ 2,205,379
Flagship Harbor Advisors, Llc reports 2.71% decrease in ownership of FTNT / Fortinet, Inc.

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 26,987 shares of Fortinet, Inc. (MX:FTNT) valued at $2,205,379 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 27,740 shares of Fortinet, Inc.. This represents a change in shares of -2.71% 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)
2026-04-28 2026-03-31 13F FORTINET COM 34959E109 26,987 -753 -2.71 2,205 0.14 0.0970
2026-01-21 2025-12-31 13F FORTINET Common Stock 34959E109 27,740 -8,895 -24.28 2,203 -28.51 0.1040
2025-11-05 2025-09-30 13F FORTINET COM 34959E109 36,635 2,828 8.37 3,080 -13.82 0.1340
2025-08-04 2025-06-30 13F FORTINET COM 34959E109 33,807 282 0.84 3,574 10.75 0.1693
2025-04-22 2025-03-31 13F FORTINET COM 34959E109 33,525 -216 -0.64 3,227 1.26 0.1697
2025-01-21 2024-12-31 13F FORTINET COM 34959E109 33,741 1,386 4.28 3,188 27.02 0.1674
2024-10-21 2024-09-30 13F FORTINET COM 34959E109 32,355 307 0.96 2,509 29.93 0.1378
2025-12-02 2024-06-30 13F FORTINET COM 34959E109 32,048 -358 -1.10 1,932 -12.74 0.1161
2024-04-16 2024-03-31 13F FORTINET COM 34959E109 32,406 -81 -0.25 2,214 16.41 0.1423
2024-01-10 2023-12-31 13F FORTINET COM 34959E109 32,487 -530 -1.61 1,901 -1.86 0.1383
2023-10-17 2023-09-30 13F FORTINET COM 34959E109 33,017 -230 -0.69 1,937 -22.92 0.1611
2023-07-11 2023-06-30 13F FORTINET COM 34959E109 33,247 -1,064 -3.10 2,513 10.22 0.2076
2023-04-12 2023-03-31 13F FORTINET COM 34959E109 34,311 -138 -0.40 2,280 35.39 0.2148
2023-01-13 2022-12-31 13F FORTINET COM 34959E109 34,449 -225 -0.65 1,684 -1.17 0.1727
2022-10-13 2022-09-30 13F FORTINET COM 34959E109 34,674 -191 -0.55 1,704 -13.63 0.1976
2022-07-13 2022-06-30 13F FORTINET COM 34959E109 34,865 27,688 385.79 1,973 -19.57 0.2216
2022-04-13 2022-03-31 13F FORTINET COM 34959E109 7,177 -475 -6.21 2,453 -10.80 0.2364
2022-02-17 2021-12-31 13F/A-1 FORTINET COM 34959E109 7,652 5 0.07 2,750 51.02 0.2602
2022-02-10 2021-12-31 13F FORTINET COM 34959E109 7,652 5 2,750 0.2602
2021-11-01 2021-09-30 13F FORTINET COM 34959E109 7,647 0 0.00 1,821 0.00 0.1956
2021-07-26 2021-06-30 13F FORTINET COM 34959E109 7,647 -206 -2.62 1,821 25.76 0.1953
2021-05-03 2021-03-31 13F FORTINET COM 34959E109 7,853 95 1.22 1,448 25.69 0.1644
2021-02-08 2020-12-31 13F FORTINET COM 34959E109 7,758 164 2.16 1,152 28.86 0.1428
2020-10-13 2020-09-30 13F FORTINET Common Stock 34959E109 7,594 349 4.82 894 -10.06 0.1207
2020-07-31 2020-06-30 13F FORTINET Common Stock 34959E109 7,245 123 1.73 994 37.86 0.1459
2020-05-12 2020-03-31 13F FORTINET Common Stock 34959E109 7,122 81 1.15 721 -4.12 0.1442
2020-02-14 2019-12-31 13F FORTINET Common Stock 34959E109 7,041 0 0.00 752 39.26 0.1317
2019-10-22 2019-09-30 13F FORTINET Common Stock 34959E109 7,041 76 1.09 540 0.93 0.1058
2019-07-22 2019-06-30 13F FORTINET Common Stock 34959E109 6,965 358 5.42 535 -3.43 0.1110
2019-04-15 2019-03-31 13F FORTINET Common Stock 34959E109 6,607 593 9.86 554 30.97 0.1138
2019-01-26 2018-12-31 13F FORTINET COM 34959E109 6,014 282 4.92 423 -20.04 0.1028
2018-11-05 2018-09-30 13F FORTINET Common Stock 34959E109 5,732 -47 -0.81 529 46.94 0.0981
2018-08-14 2018-06-30 13F FORTINET Common Stock 34959E109 5,779 312 5.71 360 25.44 0.0721
2018-04-23 2018-03-31 13F FORTINET COM 34959E109 5,467 -150 -2.67 287 12.11 0.0853
2018-01-24 2017-12-31 13F FORTINET COM 34959E109 5,617 -1,550 -21.63 256 -8.57 0.0736
2017-10-23 2017-09-30 13F FORTINET COM 34959E109 7,167 -325 -4.34 280 -2.78 0.0908
2017-08-09 2017-06-30 13F FORTINET COM 34959E109 7,492 200 2.74 288 5.11 0.1000
2017-05-16 2017-03-31 13F FORTINET COM 34959E109 7,292 -800 -9.89 274 5.79 0.1047
2017-05-15 2016-12-31 13F FORTINET COM 34959E109 8,092 8,092 259 0.1118
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.