Fortinet, Inc.
US ˙ NasdaqGS ˙ US34959E1091

SecurityFTNT / Fortinet, Inc.
InstitutionWoodstock Corp
Latest Disclosed Ownership234,494 shares
Latest Disclosed Value $ 19,162,850
Woodstock Corp reports 7.45% decrease in ownership of FTNT / Fortinet, Inc.

On April 8, 2026 - Woodstock Corp filed a 13F-HR form disclosing ownership of 234,494 shares of Fortinet, Inc. (US:FTNT) valued at $19,162,850 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 253,367 shares of Fortinet, Inc.. This represents a change in shares of -7.45% during the quarter. The current value of the position is $34,348,681 USD.

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)
2026-04-08 2026-03-31 13F Fortinet COMMON STOCK 34959E109 234,494 -18,873 -7.45 19,163 -4.76 1.7056
2026-01-14 2025-12-31 13F Fortinet COMMON STOCK 34959E109 253,367 -4,729 -1.83 20,120 -7.29 1.7266
2025-10-07 2025-09-30 13F Fortinet COMMON STOCK 34959E109 258,096 -9,373 -3.50 21,701 -23.26 1.8805
2025-07-09 2025-06-30 13F Fortinet COMMON STOCK 34959E109 267,469 -17,136 -6.02 28,277 3.21 2.5988
2025-04-09 2025-03-31 13F Fortinet COMMON STOCK 34959E109 284,605 -5,576 -1.92 27,396 -0.07 2.7063
2025-01-15 2024-12-31 13F Fortinet COMMON STOCK 34959E109 290,181 -6,406 -2.16 27,416 19.20 2.6412
2024-10-11 2024-09-30 13F Fortinet COMMON STOCK 34959E109 296,587 -8,487 -2.78 23,000 25.10 2.2131
2024-07-08 2024-06-30 13F Fortinet COMMON STOCK 34959E109 305,074 525 0.17 18,387 -11.62 1.8697
2024-04-09 2024-03-31 13F Fortinet COMMON STOCK 34959E109 304,549 -4,850 -1.57 20,804 14.88 2.1535
2024-01-08 2023-12-31 13F Fortinet COMMON STOCK 34959E109 309,399 9,604 3.20 18,109 2.94 2.0970
2023-10-10 2023-09-30 13F Fortinet COMMON STOCK 34959E109 299,795 1,675 0.56 17,592 -21.94 2.2060
2023-07-07 2023-06-30 13F Fortinet COMMON STOCK 34959E109 298,120 -3,620 -1.20 22,535 12.37 2.6591
2023-04-06 2023-03-31 13F Fortinet COMMON STOCK 34959E109 301,740 -2,110 -0.69 20,054 34.99 2.5574
2023-01-10 2022-12-31 13F Fortinet COMMON STOCK 34959E109 303,850 -2,210 -0.72 14,855 -1.21 1.9744
2022-10-11 2022-09-30 13F Fortinet COMMON STOCK 34959E109 306,060 -360 -0.12 15,037 -13.27 2.2371
2022-07-11 2022-06-30 13F Fortinet COMMON STOCK 34959E109 306,420 243,062 383.63 17,337 -19.93 2.4063
2022-04-07 2022-03-31 13F Fortinet COMMON STOCK 34959E109 63,358 -4,635 -6.82 21,652 -11.40 2.5355
2022-01-07 2021-12-31 13F Fortinet COMMON STOCK 34959E109 67,993 -3,376 -4.73 24,437 17.24 2.5587
2021-10-05 2021-09-30 13F Fortinet COMMON STOCK 34959E109 71,369 -4,239 -5.61 20,843 15.74 2.4307
2021-07-06 2021-06-30 13F Fortinet COMMON STOCK 34959E109 75,608 -3,223 -4.09 18,009 23.88 2.1191
2021-04-05 2021-03-31 13F Fortinet COMMON STOCK 34959E109 78,831 14 0.02 14,538 24.18 1.8482
2021-01-06 2020-12-31 13F Fortinet COMMON STOCK 34959E109 78,817 1,633 2.12 11,707 28.75 1.5670
2020-10-02 2020-09-30 13F Fortinet COMMON STOCK 34959E109 77,184 -4,765 -5.81 9,093 -19.17 1.4684
2020-07-07 2020-06-30 13F Fortinet COMMON STOCK 34959E109 81,949 140 0.17 11,249 35.91 1.9176
2020-04-03 2020-03-31 13F Fortinet COMMON STOCK 34959E109 81,809 -600 -0.73 8,277 -5.92 1.6866
2020-01-13 2019-12-31 13F Fortinet COMMON STOCK 34959E109 82,409 -412 -0.50 8,798 38.40 1.4330
2019-10-02 2019-09-30 13F Fortinet COMMON STOCK 34959E109 82,821 -90 -0.11 6,357 -0.20 1.1076
2019-07-03 2019-06-30 13F Fortinet COMMON STOCK 34959E109 82,911 280 0.34 6,370 -8.20 1.1121
2019-04-05 2019-03-31 13F Fortinet COMMON STOCK 34959E109 82,631 -60 -0.07 6,939 19.14 1.2432
2019-01-08 2018-12-31 13F Fortinet COMMON STOCK 34959E109 82,691 -1,560 -1.85 5,824 -25.08 1.1687
2018-10-03 2018-09-30 13F Fortinet COMMON STOCK 34959E109 84,251 -3,425 -3.91 7,774 42.02 1.3139
2018-07-23 2018-06-30 13F Fortinet COMMON STOCK 34959E109 87,676 0 0.00 5,474 16.52 1.0077
2018-04-19 2018-03-31 13F Fortinet COMMON STOCK 34959E109 87,676 2,655 3.12 4,698 26.46 0.8883
2018-01-24 2017-12-31 13F Fortinet COMMON STOCK 34959E109 85,021 19,968 30.69 3,715 59.37 0.6851
2017-10-06 2017-09-30 13F Fortinet COMMON STOCK 34959E109 65,053 36,953 131.51 2,331 121.58 0.4444
2017-07-13 2017-06-30 13F Fortinet COMMON STOCK 34959E109 28,100 28,100 1,052 0.2062
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.