Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership27,692 shares
Latest Disclosed Value $ 2,262,990
Millennium Management Llc ownership in FTNT / Fortinet, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 27,692 shares of Fortinet, Inc. (MX:FTNT) valued at $2,262,990 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,199,606 shares of Fortinet, Inc.. This represents a change in shares of -97.69% during the quarter.

Millennium Management Llc 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 440,100 of underlying shares valued at $35,964,972 USD and put options representing 171,100 of underlying shares valued at $13,982,292 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 27,692 -1,171,914 -97.69 2,263 -97.63 0.0009
2026-02-17 2025-12-31 13F FORTINET COM 34959E109 1,199,606 705,688 142.88 95,261 129.39 0.0401
2025-11-14 2025-09-30 13F FORTINET COM 34959E109 493,918 439,823 813.06 41,529 626.27 0.0177
2025-08-14 2025-06-30 13F FORTINET COM 34959E109 54,095 -1,702,131 -96.92 5,719 -96.62 0.0028
2025-05-15 2025-03-31 13F FORTINET COM 34959E109 1,756,226 -61,861 -3.40 169,054 -1.58 0.0900
2025-02-14 2024-12-31 13F FORTINET COM 34959E109 1,818,087 -1,811,984 -49.92 171,773 -38.98 0.0839
2024-11-14 2024-09-30 13F FORTINET COM 34959E109 3,630,071 1,668,426 85.05 281,512 138.11 0.1335
2024-08-14 2024-06-30 13F FORTINET COM 34959E109 1,961,645 1,113,201 131.21 118,228 103.99 0.0548
2024-05-15 2024-03-31 13F FORTINET COM 34959E109 848,444 -1,169,339 -57.95 57,957 -50.93 0.0248
2024-02-14 2023-12-31 13F FORTINET COM 34959E109 2,017,783 1,474,968 271.73 118,101 270.78 0.0511
2023-11-14 2023-09-30 13F FORTINET COM 34959E109 542,815 -1,994,539 -78.61 31,852 -83.39 0.0161
2023-08-14 2023-06-30 13F FORTINET COM 34959E109 2,537,354 1,465,451 136.71 191,799 169.23 0.0946
2023-05-15 2023-03-31 13F FORTINET COM 34959E109 1,071,903 -2,798,230 -72.30 71,239 -62.35 0.0408
2023-02-14 2022-12-31 13F FORTINET COM 34959E109 3,870,133 108,116 2.87 189,211 2.37 0.1047
2022-11-14 2022-09-30 13F FORTINET COM 34959E109 3,762,017 3,188,071 555.47 184,828 469.16 0.1093
2022-08-15 2022-06-30 13F FORTINET COM 34959E109 573,946 515,890 888.61 32,474 63.68 0.0201
2022-05-16 2022-03-31 13F FORTINET COM 34959E109 58,056 58,056 19,840 0.0105
2022-02-14 2021-12-31 13F FORTINET COM 34959E109 0 -43,244 -100.00 0 -100.00
2021-11-15 2021-09-30 13F FORTINET COM 34959E109 43,244 31,923 281.98 12,629 368.26 0.0076
2021-08-16 2021-06-30 13F FORTINET COM 34959E109 11,321 -3,633 -24.29 2,697 -2.21 0.0017
2021-05-17 2021-03-31 13F FORTINET COM 34959E109 14,954 -144,508 -90.62 2,758 -88.36 0.0020
2021-02-16 2020-12-31 13F FORTINET COM 34959E109 159,462 144,138 940.60 23,685 1,212.19 0.0171
2020-11-16 2020-09-30 13F FORTINET COM 34959E109 15,324 -213,382 -93.30 1,805 -94.25 0.0022
2020-08-14 2020-06-30 13F FORTINET COM 34959E109 228,706 228,706 31,394 0.0430
2020-05-14 2020-03-31 13F FORTINET COM 34959E109 0 -316,051 -100.00 0 -100.00
2020-02-14 2019-12-31 13F FORTINET COM 34959E109 316,051 -226,846 -41.78 33,742 -19.03 0.0422
2019-11-14 2019-09-30 13F FORTINET COM 34959E109 542,897 462,288 573.49 41,672 572.89 0.0659
2019-08-15 2019-06-30 13F/A-1 FORTINET COM 34959E109 80,609 -401,282 -83.27 6,193 -84.70 0.0093
2019-05-14 2019-03-31 13F FORTINET COM 34959E109 481,891 -1,207,264 -71.47 40,464 -65.99 0.0606
2019-02-15 2018-12-31 13F/A-1 FORTINET COM 34959E109 1,689,155 1,489,927 747.85 118,967 547.16 0.1855
2019-02-14 2018-12-31 13F FORTINET COM 34959E109 1,689,155 118,967
2018-11-14 2018-09-30 13F FORTINET COM 34959E109 199,228 -185,862 -48.26 18,383 -23.53 0.0225
2018-08-14 2018-06-30 13F FORTINET COM 34959E109 385,090 -258,961 -40.21 24,041 -30.33 0.0314
2018-05-15 2018-03-31 13F FORTINET COM 34959E109 644,051 -358,154 -35.74 34,508 -21.19 0.0460
2018-02-14 2017-12-31 13F FORTINET COM 34959E109 1,002,205 128,477 14.70 43,786 39.83 0.0604
2017-11-14 2017-09-30 13F FORTINET COM 34959E109 873,728 77 0.01 31,314 -4.26 0.0477
2017-08-14 2017-06-30 13F FORTINET COM 34959E109 873,651 -28,195 -3.13 32,709 -5.43 0.0584
2017-05-15 2017-03-31 13F FORTINET COM 34959E109 901,846 223,080 32.87 34,586 69.17 0.0634
2017-02-14 2016-12-31 13F FORTINET COM 34959E109 678,766 -183,902 -21.32 20,444 -35.83 0.0428
2016-11-14 2016-09-30 13F FORTINET COM 34959E109 862,668 802,952 1,344.62 31,858 1,589.18 0.0534
2016-08-15 2016-06-30 13F FORTINET COM 34959E109 59,716 -98,180 -62.18 1,886 -61.00 0.0043
2016-05-16 2016-03-31 13F FORTINET COM 34959E109 157,896 2,011 1.29 4,836 -0.47 0.0121
2016-02-16 2015-12-31 13F FORTINET COM 34959E109 155,885 -308,634 -66.44 4,859 -75.38 0.0102
2015-11-16 2015-09-30 13F FORTINET COM 34959E109 464,519 464,519 0.00 19,733 0.0382
2015-05-15 2015-03-31 13F FORTINET COM 34959E109 0 -42,100 -100.00 0 -100.00
2015-02-17 2014-12-31 13F FORTINET COM 34959E109 42,100 -169,117 -80.07 1,291 -75.81 0.0027
2014-11-14 2014-09-30 13F FORTINET COM 34959E109 211,217 -2,571 -1.20 5,336 -0.67 0.0135
2014-08-14 2014-06-30 13F FORTINET COM 34959E109 213,788 18,237 9.33 5,372 43.60 0.0149
2014-02-14 2013-12-31 13F FORTINET COM 34959E109 195,551 38,398 24.43 3,741 17.49 0.0118
2013-11-14 2013-09-30 13F FORTINET COM 34959E109 157,153 -179,966 -53.38 3,184 -46.03 0.0103
2013-08-14 2013-06-30 13F FORTINET COM 34959E109 337,119 337,119 5,900 0.0181
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 COM Call 440,100 -3.76 35,965 -0.96 n/a n/a n/a
2026-02-17 2025-12-31 13F FORTINET COM Call 457,300 193.89 36,314 177.59 n/a n/a n/a
2025-11-14 2025-09-30 13F FORTINET COM Call 155,600 -54.07 13,083 -63.48 n/a n/a n/a
2025-08-14 2025-06-30 13F FORTINET COM Call 338,800 1,475.81 35,818 1,631.13 n/a n/a n/a
2025-05-15 2025-03-31 13F FORTINET COM Call 21,500 -68.38 2,070 -67.79 n/a n/a n/a
2025-02-14 2024-12-31 13F FORTINET COM Call 68,000 -36.80 6,425 -23.01 n/a n/a n/a
2024-11-14 2024-09-30 13F FORTINET COM Call 107,600 -38.30 8,344 -20.62 n/a n/a n/a
2024-08-14 2024-06-30 13F FORTINET COM Call 174,400 -5.32 10,511 -16.46 n/a n/a n/a
2024-05-15 2024-03-31 13F FORTINET COM Call 184,200 10.70 12,583 29.19 n/a n/a n/a
2024-02-14 2023-12-31 13F FORTINET COM Call 166,400 280.78 9,739 279.84 n/a n/a n/a
2023-11-14 2023-09-30 13F FORTINET COM Call 43,700 183.77 2,564 120.27 n/a n/a n/a
2023-08-14 2023-06-30 13F FORTINET COM Call 15,400 175.00 1,164 212.90 n/a n/a n/a
2023-05-15 2023-03-31 13F FORTINET COM Call 5,600 -83.77 372 -77.95 n/a n/a n/a
2023-02-14 2022-12-31 13F FORTINET COM Call 34,500 14.62 1,687 14.06 n/a n/a n/a
2022-11-14 2022-09-30 13F FORTINET COM Call 30,100 -69.90 1,479 -73.86 n/a n/a n/a
2022-08-15 2022-06-30 13F FORTINET COM Call 100,000 5,658 n/a n/a n/a
2021-08-16 2021-06-30 13F FORTINET COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-17 2021-03-31 13F FORTINET COM Call 30,000 -80.48 5,533 88.20 n/a n/a n/a
2014-02-14 2013-12-31 13F FORTINET COM Call 153,700 2,940 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
(%)
2026-05-15 2026-03-31 13F FORTINET COM Put 171,100 -58.29 13,982 -57.07 n/a n/a n/a
2026-02-17 2025-12-31 13F FORTINET COM Put 410,200 -26.40 32,574 -30.48 n/a n/a n/a
2025-11-14 2025-09-30 13F FORTINET COM Put 557,300 261.18 46,858 187.25 n/a n/a n/a
2025-08-14 2025-06-30 13F FORTINET COM Put 154,300 -6.54 16,313 2.64 n/a n/a n/a
2025-05-15 2025-03-31 13F FORTINET COM Put 165,100 -63.49 15,893 -62.80 n/a n/a n/a
2025-02-14 2024-12-31 13F FORTINET COM Put 452,200 8.47 42,724 32.15 n/a n/a n/a
2024-11-14 2024-09-30 13F FORTINET COM Put 416,900 0.63 32,331 29.48 n/a n/a n/a
2024-08-14 2024-06-30 13F FORTINET COM Put 414,300 59.96 24,970 41.13 n/a n/a n/a
2024-05-15 2024-03-31 13F FORTINET COM Put 259,000 -47.20 17,692 -38.37 n/a n/a n/a
2024-02-14 2023-12-31 13F FORTINET COM Put 490,500 94.72 28,709 94.22 n/a n/a n/a
2023-11-14 2023-09-30 13F FORTINET COM Put 251,900 32.16 14,781 2.60 n/a n/a n/a
2023-08-14 2023-06-30 13F FORTINET COM Put 190,600 1,806.00 14,407 2,066.47 n/a n/a n/a
2023-05-15 2023-03-31 13F FORTINET COM Put 10,000 -39.02 665 -17.08 n/a n/a n/a
2023-02-14 2022-12-31 13F FORTINET COM Put 16,400 -45.70 802 -45.96 n/a n/a n/a
2022-11-14 2022-09-30 13F FORTINET COM Put 30,200 -66.37 1,484 -70.79 n/a n/a n/a
2022-08-15 2022-06-30 13F FORTINET COM Put 89,800 5,081 n/a n/a n/a
2022-02-14 2021-12-31 13F FORTINET COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F FORTINET COM Put 11,000 3,212 n/a n/a n/a
2019-11-14 2019-09-30 13F CYPRESS SEMICONDUCTOR COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-08-14 2019-06-30 13F CYPRESS SEMICONDUCTOR COM Put 87,600 1,948 n/a n/a n/a
2018-02-14 2017-12-31 13F FORTINET COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-14 2017-09-30 13F FORTINET COM Put 100,000 100.00 3,584 137.98 n/a n/a n/a
2017-02-14 2016-12-31 13F FORTINET COM Put 50,000 1,506 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.