Fastly, Inc.
US ˙ NasdaqGS ˙ US31188V1008

SecurityFSLY / Fastly, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership112,471 shares
Latest Disclosed Value $ 3,268,407
Walleye Capital LLC ownership in FSLY / Fastly, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 112,471 shares of Fastly, Inc. (US:FSLY) valued at $3,268,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 69,408 shares of Fastly, Inc.. This represents a change in shares of 62.04% during the quarter. The current value of the position is $2,032,351 USD.

Walleye Capital LLC 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 37,500 of underlying shares valued at $1,089,750 USD and put options representing 12,000 of underlying shares valued at $348,720 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.

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)
2026-05-13 2026-03-31 13F/A-1 FASTLY CL A 31188V100 112,471 43,063 62.04 3,268 362.89 0.0136
2026-05-08 2026-03-31 13F FASTLY CL A 31188V100 112,471 43,063 3,268 0.0136
2026-02-13 2025-12-31 13F FASTLY CL A 31188V100 69,408 48,637 234.16 707 298.87 0.0022
2025-11-14 2025-09-30 13F FASTLY CL A 31188V100 20,771 -274,309 -92.96 178 -91.50 0.0007
2025-08-13 2025-06-30 13F FASTLY CL A 31188V100 295,080 255,075 637.61 2,083 723.32 0.0081
2025-05-14 2025-03-31 13F FASTLY CL A 31188V100 40,005 -140,873 -77.88 253 -85.18 0.0011
2025-02-13 2024-12-31 13F FASTLY CL A 31188V100 180,878 -1,622 -0.89 1,707 23.61 0.0042
2024-11-14 2024-09-30 13F FASTLY CL A 31188V100 182,500 -186,668 -50.56 1,382 -49.23 0.0029
2024-08-14 2024-06-30 13F FASTLY CL A 31188V100 369,168 308,651 510.02 2,721 246.94 0.0049
2024-05-15 2024-03-31 13F FASTLY CL A 31188V100 60,517 60,517 785 0.0014
2023-08-14 2023-06-30 13F FASTLY CL A 31188V100 0 -34,327 -100.00 0 -100.00
2023-05-15 2023-03-31 13F FASTLY CL A 31188V100 34,327 34,327 610 0.0091
2022-08-19 2022-06-30 13F/A-1 FASTLY CL A 31188V100 0 -70,411 -100.00 0 -100.00
2022-08-08 2022-06-30 13F FASTLY CL A 31188V100 0 -70,411 0
2022-05-27 2022-03-31 13F/A-01 FASTLY CL A 31188V100 70,411 56,690 413.16 1,224 151.85 0.0327
2022-05-16 2022-03-31 13F FASTLY CL A 31188V100 70,411 56,690 1,224 0.0249
2022-05-27 2021-12-31 13F/A-01 FASTLY CL A 31188V100 13,721 -11,032 -44.57 486 -51.45 0.0151
2022-03-03 2021-12-31 13F FASTLY CL A 31188V100 13,721 -11,032 486 0.0121
2021-11-15 2021-09-30 13F FASTLY CL A 31188V100 24,753 24,753 1,001 0.0284
2020-11-16 2020-09-30 13F FASTLY CL A 31188V100 0 -3,734 -100.00 0 -100.00
2020-08-14 2020-06-30 13F FASTLY CL A 31188V100 3,734 3,734 318 0.0709
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
(%)
2026-05-13 2026-03-31 13F/A FASTLY CL A Call 37,500 -66.96 1,090 -5.71 n/a n/a n/a
2026-05-08 2026-03-31 13F FASTLY CL A Call 37,500 1,090 n/a n/a n/a
2026-02-13 2025-12-31 13F FASTLY CL A Call 113,500 2,422.22 1,155 2,939.47 n/a n/a n/a
2025-11-14 2025-09-30 13F FASTLY CL A Call 4,500 -80.35 38 -76.40 n/a n/a n/a
2025-08-13 2025-06-30 13F FASTLY CL A Call 22,900 -14.87 162 -5.29 n/a n/a n/a
2025-05-14 2025-03-31 13F FASTLY CL A Call 26,900 -27.88 170 -51.70 n/a n/a n/a
2025-02-13 2024-12-31 13F FASTLY CL A Call 37,300 90.31 352 137.84 n/a n/a n/a
2024-11-14 2024-09-30 13F FASTLY CL A Call 19,600 -79.52 148 -79.01 n/a n/a n/a
2024-08-14 2024-06-30 13F FASTLY CL A Call 95,700 78.88 705 1.73 n/a n/a n/a
2024-05-15 2024-03-31 13F FASTLY CL A Call 53,500 97.42 694 43.78 n/a n/a n/a
2024-02-14 2023-12-31 13F FASTLY CL A Call 27,100 -50.09 482 -53.65 n/a n/a n/a
2023-11-21 2023-09-30 13F/A FASTLY CL A Call 54,300 -53.39 1,041 -43.39 n/a n/a n/a
2023-11-14 2023-09-30 13F FASTLY CL A Call 54,300 1,041 n/a n/a n/a
2023-08-14 2023-06-30 13F FASTLY CL A Call 116,500 1,692.31 1,837 1,497.39 n/a n/a n/a
2023-05-15 2023-03-31 13F FASTLY CL A Call 6,500 -35.00 115 41.98 n/a n/a n/a
2023-02-14 2022-12-31 13F FASTLY CL A Call 10,000 82 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
(%)
2026-05-13 2026-03-31 13F/A FASTLY CL A Put 12,000 30.43 349 274.19 n/a n/a n/a
2026-05-08 2026-03-31 13F FASTLY CL A Put 12,000 349 n/a n/a n/a
2026-02-13 2025-12-31 13F FASTLY CL A Put 9,200 76.92 94 111.36 n/a n/a n/a
2025-11-14 2025-09-30 13F FASTLY CL A Put 5,200 -69.41 44 -63.33 n/a n/a n/a
2025-08-13 2025-06-30 13F FASTLY CL A Put 17,000 120 n/a n/a n/a
2025-05-14 2025-03-31 13F FASTLY CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-13 2024-12-31 13F FASTLY CL A Put 299,900 5.27 2,831 31.31 n/a n/a n/a
2024-11-14 2024-09-30 13F FASTLY CL A Put 284,900 -31.00 2,157 -29.15 n/a n/a n/a
2024-08-14 2024-06-30 13F FASTLY CL A Put 412,900 278.11 3,043 114.90 n/a n/a n/a
2024-05-15 2024-03-31 13F FASTLY CL A Put 109,200 -14.89 1,416 -37.98 n/a n/a n/a
2024-02-14 2023-12-31 13F FASTLY CL A Put 128,300 -29.58 2,284 -34.62 n/a n/a n/a
2023-11-21 2023-09-30 13F/A FASTLY CL A Put 182,200 53.89 3,493 87.04 n/a n/a n/a
2023-11-14 2023-09-30 13F FASTLY CL A Put 182,200 3,493 n/a n/a n/a
2023-08-14 2023-06-30 13F FASTLY CL A Put 118,400 894.96 1,867 784.83 n/a n/a n/a
2023-05-15 2023-03-31 13F FASTLY CL A Put 11,900 211 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.