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MX ˙ BMV ˙ US31188V1008
SecurityMX:FSLY / Fastly, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership139,761 shares
Latest Disclosed Value $ 4,061,279
Advisor Group Holdings, Inc. ownership in FSLY / Fastly, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 139,761 shares of Fastly, Inc. (MX:FSLY) valued at $4,061,279 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 58,425 shares of Fastly, Inc.. This represents a change in shares of 139.21% during the quarter.

Advisor Group Holdings, Inc. has a history of taking positions in derivatives of the underlying security (FSLY) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 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:FSLY / Fastly, 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 FASTLY CL A 31188V100 139,761 81,336 139.21 4,061 583.67 0.0035
2026-02-17 2025-12-31 13F FASTLY CL A 31188V100 58,425 -2,645 -4.33 595 26.38 0.0009
2025-11-14 2025-09-30 13F FASTLY CL A 31188V100 61,070 424 0.70 470 9.81 0.0007
2025-09-04 2025-06-30 13F/A-1 FASTLY CL A 31188V100 60,646 51,611 571.23 428 650.88 0.0008
2025-08-13 2025-06-30 13F FASTLY CL A 31188V100 10,226 1,191 93 0.0001
2025-05-12 2025-03-31 13F FASTLY CL A 31188V100 9,035 -1,686 -15.73 57 -43.56 0.0001
2025-06-06 2024-12-31 13F/A-1 FASTLY CL A 31188V100 10,721 -2,435 -18.51 101 2.02 0.0002
2025-02-07 2024-12-31 13F FASTLY CL A 31188V100 10,466 -2,690 83 0.0002
2024-11-13 2024-09-30 13F FASTLY CL A 31188V100 13,156 -2,157 -14.09 100 -11.61 0.0002
2024-08-13 2024-06-30 13F FASTLY CL A 31188V100 15,313 -7 -0.05 113 -43.43 0.0003
2024-05-10 2024-03-31 13F FASTLY CL A 31188V100 15,320 -934 -5.75 199 -31.49 0.0004
2024-02-12 2023-12-31 13F FASTLY CL A 31188V100 16,254 -3,245 -16.64 289 -22.52 0.0005
2023-11-13 2023-09-30 13F FASTLY CL A 31188V100 19,499 1,443 7.99 374 30.88 0.0006
2023-08-21 2023-06-30 13F/A-1 FASTLY CL A 31188V100 18,056 -41,340 -69.60 286 -72.91 0.0005
2023-08-10 2023-06-30 13F FASTLY CL A 31188V100 18,056 -41,340 286 0.0001
2023-05-12 2023-03-31 13F FASTLY CL A 31188V100 59,396 31,777 115.05 1,052 367.56 0.0020
2023-02-10 2022-12-31 13F FASTLY CL A 31188V100 27,619 -18,487 -40.10 226 -46.68 0.0005
2022-11-14 2022-09-30 13F FASTLY CL A 31188V100 46,106 6,565 16.60 422 -8.66 0.0010
2022-08-10 2022-06-30 13F FASTLY CL A 31188V100 39,541 1,843 4.89 462 -29.25 0.0010
2022-05-04 2022-03-31 13F FASTLY CL A 31188V100 37,698 -27,362 -42.06 653 -71.71 0.0013
2022-02-03 2021-12-31 13F FASTLY CL A 31188V100 65,060 -21,548 -24.88 2,308 -34.09 0.0044
2021-11-05 2021-09-30 13F FASTLY CL A 31188V100 86,608 -16,201 -15.76 3,502 -42.83 0.0073
2021-08-02 2021-06-30 13F FASTLY CL A 31188V100 102,809 -357 -0.35 6,126 -11.78 0.0133
2021-05-13 2021-03-31 13F FASTLY CL A 31188V100 103,166 23,672 29.78 6,944 -0.03 0.0167
2021-02-10 2020-12-31 13F FASTLY CL A 31188V100 79,494 -10,232 -11.40 6,946 -17.26 0.0185
2020-11-12 2020-09-30 13F FASTLY CL A 31188V100 89,726 -12,257 -12.02 8,395 -3.31 0.0251
2020-08-14 2020-06-30 13F FASTLY CL A 31188V100 101,983 -63,247 -38.28 8,682 766.47 0.0291
2020-05-18 2020-03-31 13F FASTLY CL A 31188V100 165,230 165,230 1,002 0.0041
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
(%)
2022-05-04 2022-03-31 13F FASTLY INC CALL CL A Call 0 -100.00 0 n/a n/a n/a
2022-02-03 2021-12-31 13F FASTLY INC CALL CL A Call 1 0 n/a n/a n/a
2021-08-02 2021-06-30 13F FASTLY INC CALL CL A Call 0 -100.00 0 n/a n/a n/a
2021-05-13 2021-03-31 13F FASTLY INC CALL CL A Call 20 233.33 0 -100.00 n/a n/a n/a
2021-02-10 2020-12-31 13F FASTLY INC CALL CL A Call 6 7 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.