Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership161,014 shares
Latest Disclosed Value $ 13,157,986
Advisor Group Holdings, Inc. ownership in FTNT / Fortinet, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 161,014 shares of Fortinet, Inc. (MX:FTNT) valued at $13,157,986 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 187,812 shares of Fortinet, Inc.. This represents a change in shares of -14.27% during the quarter.

Advisor Group Holdings, Inc. has a history of taking positions in derivatives of the underlying security (FTNT) in the form of stock options. The firm currently holds call options representing 1 of underlying shares valued at $3,380 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:FTNT / Fortinet, Inc. Historical Put/Call Ratio
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 161,014 -26,798 -14.27 13,158 -11.78 0.0112
2026-02-17 2025-12-31 13F FORTINET COM 34959E109 187,812 -30,501 -13.97 14,914 -17.14 0.0218
2025-11-14 2025-09-30 13F FORTINET COM 34959E109 218,313 105,158 92.93 18,001 50.48 0.0252
2025-09-04 2025-06-30 13F/A-1 ORTINET COM 34959E109 113,155 10,284 10.00 11,963 20.80 0.0213
2025-08-13 2025-06-30 13F ORTINET COM 34959E109 91,585 -11,286 8,996 0.0104
2025-05-12 2025-03-31 13F FORTINET COM 34959E109 102,871 -3,544 -3.33 9,902 6.12 0.0221
2025-06-06 2024-12-31 13F/A-1 FORTINET COM 34959E109 106,415 -103,346 -49.27 9,331 -42.64 0.0209
2025-02-07 2024-12-31 13F FORTINET COM 34959E109 123,668 -86,093 9,635 0.0246
2024-11-13 2024-09-30 13F FORTINET COM 34959E109 209,761 97,940 87.59 16,267 141.39 0.0367
2024-08-13 2024-06-30 13F FORTINET COM 34959E109 111,821 -110,353 -49.67 6,739 -55.59 0.0159
2024-05-10 2024-03-31 13F FORTINET COM 34959E109 222,174 50,539 29.45 15,176 51.08 0.0339
2024-02-12 2023-12-31 13F FORTINET COM 34959E109 171,635 -116,312 -40.39 10,045 -40.54 0.0176
2023-11-13 2023-09-30 13F FORTINET COM 34959E109 287,947 28,635 11.04 16,896 -13.94 0.0250
2023-08-21 2023-06-30 13F/A-1 FORTINET COM 34959E109 259,312 15,163 6.21 19,631 20.99 0.0352
2023-08-10 2023-06-30 13F FORTINET COM 34959E109 263,414 19,265 19,627 0.0053
2023-05-12 2023-03-31 13F FORTINET COM 34959E109 244,149 18,145 8.03 16,226 46.85 0.0305
2023-02-10 2022-12-31 13F FORTINET COM 34959E109 226,004 46,437 25.86 11,050 25.26 0.0224
2022-11-14 2022-09-30 13F FORTINET COM 34959E109 179,567 -82,500 -31.48 8,821 -40.51 0.0202
2022-08-10 2022-06-30 13F FORTINET COM 34959E109 262,067 211,806 421.41 14,828 -13.09 0.0327
2022-05-04 2022-03-31 13F FORTINET COM 34959E109 50,261 -20,296 -28.77 17,061 -32.49 0.0331
2022-02-03 2021-12-31 13F FORTINET COM 34959E109 70,557 6,256 9.73 25,273 34.59 0.0478
2021-11-05 2021-09-30 13F FORTINET COM 34959E109 64,301 10,771 20.12 18,778 46.97 0.0391
2021-08-02 2021-06-30 13F FORTINET COM 34959E109 53,530 1,055 2.01 12,777 31.99 0.0277
2021-05-13 2021-03-31 13F FORTINET COM 34959E109 52,475 -9,622 -15.50 9,680 4.97 0.0233
2021-02-10 2020-12-31 13F FORTINET COM 34959E109 62,097 1,404 2.31 9,222 27.80 0.0246
2020-11-12 2020-09-30 13F FORTINET COM 34959E109 60,693 -28,016 -31.58 7,216 -40.74 0.0216
2020-08-14 2020-06-30 13F FORTINET COM 34959E109 88,709 43,136 94.65 12,177 183.78 0.0409
2020-05-18 2020-03-31 13F FORTINET COM 34959E109 45,573 45,573 4,291 0.0176
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F FORTINET CALL Call 1 -66.67 3 -57.14 n/a n/a n/a
2026-02-17 2025-12-31 13F FORTINET CALL Call 3 -25.00 7 0.00 n/a n/a n/a
2025-11-14 2025-09-30 13F FORTINET CALL Call 4 33.33 7 -36.36 n/a n/a n/a
2025-09-04 2025-06-30 13F/A FORTINET CALL Call 3 0.00 11 22.22 n/a n/a n/a
2025-08-13 2025-06-30 13F FORTINET CALL Call 3 12 n/a n/a n/a
2025-05-12 2025-03-31 13F FORTINET CALL Call 3 0.00 9 -18.18 n/a n/a n/a
2025-06-06 2024-12-31 13F/A FORTINET CALL Call 3 0.00 12 57.14 n/a n/a n/a
2025-02-07 2024-12-31 13F FORTINET CALL Call 3 7 n/a n/a n/a
2024-11-13 2024-09-30 13F FORTINET CALL Call 3 0.00 7 133.33 n/a n/a n/a
2024-08-13 2024-06-30 13F FORTINET CALL Call 3 0.00 4 -40.00 n/a n/a n/a
2024-05-10 2024-03-31 13F FORTINET CALL Call 3 200.00 6 400.00 n/a n/a n/a
2024-02-12 2023-12-31 13F FORTINET INC CALL COM Call 1 1 n/a n/a n/a
2023-05-12 2023-03-31 13F FORTINET INC CALL COM Call 0 -100.00 0 n/a n/a n/a
2023-02-10 2022-12-31 13F FORTINET INC CALL COM Call 5 0.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F FORTINET INC CALL COM Call 5 0.00 1 -75.00 n/a n/a n/a
2022-08-10 2022-06-30 13F FORTINET INC CALL COM Call 5 400.00 4 -55.56 n/a n/a n/a
2022-05-04 2022-03-31 13F FORTINET INC CALL COM Call 1 0.00 9 -18.18 n/a n/a n/a
2022-02-03 2021-12-31 13F FORTINET INC CALL COM Call 1 11 n/a n/a n/a
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.