Fortinet, Inc.
MX ˙ BMV ˙ US34959E1091
SecurityMX:FTNT / Fortinet, Inc.
InstitutionAldebaran Financial Inc.
Latest Disclosed Ownership61,681 shares
Latest Disclosed Value $ 5,040,571
Aldebaran Financial Inc. reports 8.14% decrease in ownership of FTNT / Fortinet, Inc.

On May 14, 2026 - Aldebaran Financial Inc. filed a 13F-HR form disclosing ownership of 61,681 shares of Fortinet, Inc. (MX:FTNT) valued at $5,040,571 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 67,148 shares of Fortinet, Inc.. This represents a change in shares of -8.14% 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)
2026-05-14 2026-03-31 13F FORTINET COM 34959E109 61,681 -5,467 -8.14 5,041 -6.53 4.7874
2026-01-23 2025-12-31 13F FORTINET COM 34959E109 67,148 -3,385 -4.80 5,393 -9.07 4.9908
2025-11-19 2025-09-30 13F FORTINET COM 34959E109 70,533 -2,509 -3.44 5,930 -23.21 5.9330
2025-08-14 2025-06-30 13F FORTINET COM 34959E109 73,042 554 0.76 7,722 10.68 8.5460
2025-05-08 2025-03-31 13F FORTINET COM 34959E109 72,488 -955 -1.30 6,978 -0.13 8.5274
2025-02-14 2024-12-31 13F FORTINET COM 34959E109 73,443 -5,065 -6.45 6,987 14.75 8.1655
2024-11-21 2024-09-30 13F FORTINET COM 34959E109 78,508 30 0.04 6,088 28.74 7.1768
2024-08-22 2024-06-30 13F FORTINET COM 34959E109 78,478 -2,305 -2.85 4,730 -14.30 6.1982
2024-05-13 2024-03-31 13F FORTINET COM 34959E109 80,783 -2,661 -3.19 5,518 13.00 7.8018
2024-02-01 2023-12-31 13F FORTINET COM 34959E109 83,444 -5,950 -6.66 4,884 -6.90 7.2011
2023-11-06 2023-09-30 13F FORTINET COM 34959E109 89,394 -18,555 -17.19 5,246 -35.72 8.1848
2023-07-25 2023-06-30 13F FORTINET COM 34959E109 107,949 -18,540 -14.66 8,160 -2.94 11.0814
2023-04-24 2023-03-31 13F FORTINET COM 34959E109 126,489 -59,645 -32.04 8,406 -7.63 10.8422
2023-03-06 2022-12-31 13F FORTINET COM 34959E109 186,134 -2,645 -1.40 9,100 -3.76 9.7779
2022-11-14 2022-09-30 13F FORTINET COM 34959E109 188,779 -6,371 -3.26 9,456 -14.54 10.3857
2022-08-01 2022-06-30 13F FORTINET COM 34959E109 195,150 151,993 352.19 11,065 -24.97 11.7011
2022-04-18 2022-03-31 13F FORTINET COM 34959E109 43,157 -1,265 -2.85 14,748 -7.62 11.4590
2022-02-16 2021-12-31 13F FORTINET COM 34959E109 44,422 250 0.57 15,965 23.76 11.7880
2021-10-21 2021-09-30 13F FORTINET COM 34959E109 44,172 -406 -0.91 12,900 20.49 10.4232
2021-07-16 2021-06-30 13F FORTINET COM 34959E109 44,578 -305 -0.68 10,706 29.35 8.7973
2021-05-03 2021-03-31 13F FORTINET COM 34959E109 44,883 -1,155 -2.51 8,277 21.04 7.3040
2021-02-05 2020-12-31 13F FORTINET COM 34959E109 46,038 -115 -0.25 6,838 25.77 6.3629
2020-10-19 2020-09-30 13F FORTINET COM 34959E109 46,153 665 1.46 5,437 -12.92 5.6512
2020-07-20 2020-06-30 13F FORTINET COM 34959E109 45,488 -20,396 -30.96 6,244 -6.32 7.3355
2020-04-24 2020-03-31 13F FORTINET COM 34959E109 65,884 -2,761 -4.02 6,665 -9.06 6.5063
2020-02-10 2019-12-31 13F FORTINET COM 34959E109 68,645 -14,283 -17.22 7,329 14.69 5.5653
2019-10-21 2019-09-30 13F FORTINET COM 34959E109 82,928 1,275 1.56 6,390 1.87 4.2651
2019-08-14 2019-06-30 13F FORTINET COM 34959E109 81,653 1,300 1.62 6,273 -7.03 4.3336
2019-04-23 2019-03-31 13F FORTINET COM 34959E109 80,353 -400 -0.50 6,747 18.64 4.7445
2019-02-14 2018-12-31 13F FORTINET COM 34959E109 80,753 -451 -0.56 5,687 -24.10 4.3280
2018-11-08 2018-09-30 13F FORTINET COM 34959E109 81,204 -2,368 -2.83 7,493 43.63 4.8628
2018-08-10 2018-06-30 13F FORTINET COM 34959E109 83,572 -5,040 -5.69 5,217 9.88 3.5810
2018-05-12 2018-03-31 13F/A-1 FORTINET COM 34959E109 88,612 -1,699 -1.88 4,748 20.32 3.1842
2018-04-24 2018-03-31 13F FORTINET COM 34959E109 88,612 -1,699 4,748
2018-03-02 2017-12-31 13F FORTINET COM 34959E109 90,311 -1,659 -1.80 3,946 19.72 2.6222
2017-11-17 2017-09-30 13F FORTINET COM 34959E109 91,970 160 0.17 3,296 -4.10 2.2738
2017-08-28 2017-06-30 13F FORTINET COM 34959E109 91,810 -1,675 -1.79 3,437 -4.13 2.5063
2017-06-16 2017-03-31 13F FORTINET COM 34959E109 93,485 50 0.05 3,585 27.40 2.7281
2017-03-23 2016-12-31 13F FORTINET COM 34959E109 93,435 -10,085 -9.74 2,814 -26.39 2.2277
2016-12-16 2016-09-30 13F FORTINET COM 34959E109 103,520 14,250 15.96 3,823 27.99 3.0308
2016-08-25 2016-06-30 13F FORTINET COM 34959E109 89,270 3,050 3.54 2,987 13.10 2.4005
2016-05-16 2016-03-31 13F FORTINET COM 34959E109 86,220 1,443 1.70 2,641 3.04 2.3038
2016-02-17 2015-12-31 13F FORTINET COM 34959E109 84,777 6,452 8.24 2,563 -22.96 2.3735
2015-11-13 2015-09-30 13F FORTINET COM 34959E109 78,325 -2,575 -3.18 3,327 -0.51 3.1435
2015-08-17 2015-06-30 13F/A-1 FORTINET COM 34959E109 80,900 3,075 3.95 3,344 22.94 2.8208
2015-08-14 2015-06-30 13F FORTINET COM 34959E109 80,900 3,344
2015-06-02 2015-03-31 13F FORTINET COM 34959E109 77,825 13,525 21.03 2,720 38.00 2.3335
2015-02-13 2014-12-31 13F FORTINET COM 34959E109 64,300 1,875 3.00 1,971 24.98 1.7318
2014-11-14 2014-09-30 13F FORTINET COM 34959E109 62,425 -2,900 -4.44 1,577 -3.96 1.4101
2014-08-15 2014-06-30 13F FORTINET COM 34959E109 65,325 4,900 8.11 1,642 23.37 1.2926
2014-05-16 2014-03-31 13F/A-1 FORTINET COM 34959E109 60,425 60,425 1,331 1.1627
2014-05-15 2014-03-31 13F FORTINET COM 34959E109 60,000 1,331
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.