Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership1,258,818 shares
Latest Disclosed Value $ 102,870,607
Bnp Paribas Arbitrage, Sa ownership in FTNT / Fortinet, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 1,258,818 shares of Fortinet, Inc. (MX:FTNT) valued at $102,870,607 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,675,881 shares of Fortinet, Inc.. This represents a change in shares of -24.89% during the quarter.

Bnp Paribas Arbitrage, Sa 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 0 of underlying shares valued at $0 USD and put options representing 632 of underlying shares valued at $5,164,704 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)
2026-05-12 2026-03-31 13F Fortinet Equity 34959E109 1,258,818 -417,063 -24.89 102,871 -22.70 0.0051
2026-02-10 2025-12-31 13F Fortinet Equity 34959E109 1,675,881 313,455 23.01 133,082 16.18 0.0603
2025-11-13 2025-09-30 13F Fortinet Equity 34959E109 1,362,426 125,366 10.13 114,553 -12.41 0.0612
2025-08-14 2025-06-30 13F Fortinet Equity 34959E109 1,237,060 -1,374,050 -52.62 130,782 -47.97 0.0750
2025-05-14 2025-03-31 13F Fortinet Equity 34959E109 2,611,110 33,027 1.28 251,345 3.19 0.1478
2025-02-14 2024-12-31 13F Fortinet Equity 34959E109 2,578,083 375,631 17.06 243,577 42.61 0.1365
2024-11-13 2024-09-30 13F Fortinet Equity 34959E109 2,202,452 213,628 10.74 170,800 42.49 0.1148
2024-08-13 2024-06-30 13F Fortinet Equity 34959E109 1,988,824 684,706 52.50 119,866 34.55 0.0977
2024-05-01 2024-03-31 13F Fortinet Equity 34959E109 1,304,118 253,031 24.07 89,084 44.79 0.0782
2024-02-14 2023-12-31 13F/A-2 Fortinet Equity 34959E109 1,051,087 211,280 25.16 61,526 24.85 0.0699
2024-02-07 2023-12-31 13F/A-1 Fortinet Equity 34959E109 970,307 130,500 56,792 0.0080
2024-02-07 2023-12-31 13F Fortinet Equity 34959E109 970,307 56,792
2023-11-14 2023-09-30 13F Fortinet Equity 34959E109 839,807 -121,285 -12.62 49,280 -32.17 0.0633
2023-08-09 2023-06-30 13F Fortinet Equity 34959E109 961,092 227,984 31.10 72,649 49.11 0.0909
2023-05-12 2023-03-31 13F FORTINET EQUITY 34959E109 733,108 41,277 5.97 48,722 44.05 0.0683
2023-02-14 2022-12-31 13F Fortinet Equity 34959E109 691,831 90,255 15.00 33,824 14.44 0.0520
2022-11-16 2022-09-30 13F/A-1 Fortinet Equity 34959E109 601,576 292,491 94.63 29,555 69.00 0.0473
2022-11-15 2022-09-30 13F Fortinet Equity 34959E109 601,576 292,491 29,555 0.0071
2022-08-12 2022-06-30 13F Fortinet Equity 34959E109 309,085 179,771 139.02 17,488 -60.43 0.0273
2022-05-18 2022-03-31 13F/A-1 Fortinet Equity 34959E109 129,314 -26,421 -16.97 44,192 -21.05 0.0594
2022-02-09 2021-12-31 13F FORTINET EQUITY 34959E109 155,735 28,123 22.04 55,971 50.19 0.0797
2021-11-16 2021-09-30 13F/A-1 FORTINET EQUITY 34959E109 127,612 -8,313 -6.12 37,268 15.11 0.0528
2021-11-12 2021-09-30 13F FORTINET EQUITY 34959E109 147,436 11,511 17,369 0.0000
2021-08-10 2021-06-30 13F FORTINET EQUITY 34959E109 135,925 38,332 39.28 32,376 79.88 0.0428
2021-05-07 2021-03-31 13F FORTINET EQUITY 34959E109 97,593 1,468 1.53 17,998 26.06 0.0263
2021-02-10 2020-12-31 13F FORTINET EQUITY 34959E109 96,125 -51,311 -34.80 14,277 -17.80 0.0266
2020-10-30 2020-09-30 13F FORTINET EQUITY 34959E109 147,436 -10,566 -6.69 17,369 -19.91 0.0248
2020-08-06 2020-06-30 13F FORTINET EQUITY 34959E109 158,002 6,714 4.44 21,689 41.71 0.0383
2020-05-13 2020-03-31 13F FORTINET EQUITY 34959E109 151,288 -107,883 -41.63 15,306 -44.69 0.0314
2020-02-12 2019-12-31 13F FORTINET EQUITY 34959E109 259,171 151,622 140.98 27,669 235.18 0.0504
2019-11-07 2019-09-30 13F FORTINET EQUITY 34959E109 107,549 8,026 8.06 8,255 7.96 0.0147
2019-07-30 2019-06-30 13F FORTINET EQUITY 34959E109 99,523 -50,437 -33.63 7,646 -39.28 0.0152
2019-04-25 2019-03-31 13F FORTINET EQUITY 34959E109 149,960 -368,612 -71.08 12,592 -65.52 0.0272
2019-02-12 2018-12-31 13F FORTINET EQUITY 34959E109 518,572 396,714 325.55 36,523 224.85 0.0863
2018-11-07 2018-09-30 13F FORTINET EQUITY 34959E109 121,858 32,085 35.74 11,244 100.62 0.0166
2018-07-25 2018-06-30 13F FORTINET EQUITY 34959E109 89,773 17,679 24.52 5,605 45.11 0.0093
2018-05-11 2018-03-31 13F FORTINET EQUITY 34959E109 72,094 -75,475 -51.15 3,863 -40.10 0.0072
2018-03-05 2017-12-31 13F/A-1 FORTINET EQUITY 34959E109 147,569 -347,201 -70.17 6,447 -63.64 0.0114
2018-02-01 2017-12-31 13F FORTINET EQUITY 34959E109 147,569 -347,201 6,447
2017-11-03 2017-09-30 13F FORTINET STOCK 34959E109 494,770 48,921 10.97 17,733 6.23 0.0433
2017-08-03 2017-06-30 13F FORTINET STOCK 34959E109 445,849 398,681 845.24 16,693 823.23 0.0503
2017-05-03 2017-03-31 13F FORTINET STOCK 34959E109 47,168 -9,326 -16.51 1,809 6.29 0.0048
2017-02-14 2016-12-31 13F FORTINET STOCK 34959E109 56,494 29,103 106.25 1,702 68.25 0.0080
2016-10-05 2016-09-30 13F * FORTINET INC COM STOCK 34959E109 27,391 -41,048 -59.98 1,012 -53.22 0.0042
2016-07-06 2016-06-30 13F * FORTINET INC COM STOCK 34959E109 68,439 -30,237 -30.64 2,162 -28.49 0.0098
2016-04-22 2016-03-31 13F * FORTINET INC COM STOCK 34959E109 98,676 40,485 69.57 3,022 66.69 0.0128
2016-04-19 2015-12-31 13F/A-1 * FORTINET INC COM STOCK 34959E109 58,191 -128 -0.22 1,814 -26.81 0.0088
2016-02-10 2015-12-31 13F * FORTINET INC COM STOCK 34959E109 58,191 1,814
2015-11-13 2015-09-30 13F * FORTINET INC COM STOCK 34959E109 58,319 -823 -1.39 2,477 1.35 0.0062
2015-08-14 2015-06-30 13F FORTINET INC COM STOCK 34959E109 59,142 40,165 211.65 2,444 268.63 0.0068
2015-05-15 2015-03-31 13F * FORTINET INC COM STOCK 34959E109 18,977 16,149 571.04 663 670.93 0.0018
2015-03-10 2014-12-31 13F/A-1 * FORTINET INC COM STOCK 34959E109 2,828 -629 -18.19 87 -1.15 0.0003
2015-02-11 2014-12-31 13F * FORTINET INC COM STOCK 34959E109 2,828 87
2014-11-12 2014-09-30 13F * FORTINET INC COM STOCK 34959E109 3,457 2,686 348.38 87 357.89 0.0001
2014-08-14 2014-06-30 13F/A-1 * FORTINET INC COM STOCK 34959E109 771 -8,871 -92.00 19 -91.00 0.0000
2014-08-14 2014-06-30 13F FORTINET INC COM STOCK 34959E109 771 19
2014-05-13 2014-03-31 13F FORTINET STOCK 34959E109 9,642 -65,358 -87.14 212 -86.11 0.0002
2013-11-13 2013-09-30 13F FORTINET STOCK 34959E109 75,000 75,000 1,520 0.0011
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
(%)
2026-05-12 2026-03-31 13F Fortinet Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-10 2025-12-31 13F Fortinet Option Call 13 0.00 103 -5.50 n/a n/a n/a
2025-11-13 2025-09-30 13F Fortinet Option Call 13 -94.44 109 -95.59 n/a n/a n/a
2025-08-14 2025-06-30 13F Fortinet Option Call 234 -17.61 2,474 -9.51 n/a n/a n/a
2025-05-14 2025-03-31 13F Fortinet Option Call 284 4.80 2,734 6.76 n/a n/a n/a
2025-02-14 2024-12-31 13F Fortinet Option Call 271 35.50 2,560 65.05 n/a n/a n/a
2024-11-13 2024-09-30 13F Fortinet Option Call 200 1,551 n/a n/a n/a
2024-05-01 2024-03-31 13F Fortinet Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Fortinet Option Call 300 0.00 1,756 -0.28 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Fortinet Option Call 300 1,756 n/a n/a n/a
2024-02-07 2023-12-31 13F Fortinet Option Call 300 1,756 n/a n/a n/a
2023-11-14 2023-09-30 13F Fortinet Option Call 300 0.00 1,760 -22.36 n/a n/a n/a
2023-08-09 2023-06-30 13F Fortinet Option Call 300 2,268 n/a n/a n/a
Disclosed Put 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
(%)
2026-05-12 2026-03-31 13F Fortinet Option Put 632 -63.15 5,165 -62.08 n/a n/a n/a
2026-02-10 2025-12-31 13F Fortinet Option Put 1,715 0.00 13,619 -5.56 n/a n/a n/a
2025-11-13 2025-09-30 13F Fortinet Option Put 1,715 -24.28 14,420 -39.78 n/a n/a n/a
2025-08-14 2025-06-30 13F Fortinet Option Put 2,265 -1.13 23,946 8.58 n/a n/a n/a
2025-05-14 2025-03-31 13F Fortinet Option Put 2,291 77.18 22,053 80.53 n/a n/a n/a
2025-02-14 2024-12-31 13F Fortinet Option Put 1,293 73.32 12,216 111.17 n/a n/a n/a
2024-11-13 2024-09-30 13F Fortinet Option Put 746 5,785 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.