Fastly, Inc.
MX ˙ BMV ˙ US31188V1008
SecurityMX:FSLY / Fastly, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership2,741,549 shares
Latest Disclosed Value $ 79,619,811
Dimensional Fund Advisors Lp reports 0.40% increase in ownership of FSLY / Fastly, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 2,741,549 shares of Fastly, Inc. (MX:FSLY) valued at $79,619,811 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,730,527 shares of Fastly, Inc.. This represents a change in shares of 0.40% 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)
2026-05-07 2026-03-31 13F FASTLY CL A 31188V100 2,741,549 11,022 0.40 79,620 186.44 0.0165
2026-02-12 2025-12-31 13F FASTLY CL A 31188V100 2,730,527 -1,407,281 -34.01 27,796 -21.43 0.0058
2025-11-12 2025-09-30 13F FASTLY CL A 31188V100 4,137,808 117,213 2.92 35,380 24.65 0.0076
2025-08-12 2025-06-30 13F FASTLY CL A 31188V100 4,020,595 592,640 17.29 28,384 30.80 0.0066
2025-05-13 2025-03-31 13F FASTLY CL A 31188V100 3,427,955 329,446 10.63 21,700 -25.81 0.0054
2025-02-13 2024-12-31 13F FASTLY CL A 31188V100 3,098,509 12,974 0.42 29,250 25.23 0.0070
2024-11-07 2024-09-30 13F FASTLY CL A 31188V100 3,085,535 -294,063 -8.70 23,357 -6.23 0.0057
2024-08-09 2024-06-30 13F FASTLY CL A 31188V100 3,379,598 5,601 0.17 24,908 -43.08 0.0065
2024-05-10 2024-03-31 13F FASTLY CL A 31188V100 3,373,997 -218,489 -6.08 43,761 -31.57 0.0118
2024-02-07 2023-12-31 13F FASTLY CL A 31188V100 3,592,486 -155,819 -4.16 63,951 -11.00 0.0187
2023-11-09 2023-09-30 13F FASTLY CL A 31188V100 3,748,305 283,432 8.18 71,852 31.50 0.0236
2023-08-09 2023-06-30 13F FASTLY CL A 31188V100 3,464,873 525,998 17.90 54,641 4.69 0.0174
2023-05-12 2023-03-31 13F FASTLY CL A 31188V100 2,938,875 1,983,946 207.76 52,191 745,485.71 0.0176
2023-02-09 2022-12-31 13F FASTLY CL A 31188V100 954,929 701,153 276.29 8 -99.70 0.0023
2022-11-10 2022-09-30 13F FASTLY CL A 31188V100 253,776 253,776 2,325 0.0009
2021-11-12 2021-09-30 13F FASTLY CLA 31188V100 0 -25,252 -100.00 0 -100.00
2021-08-12 2021-06-30 13F FASTLY CLA 31188V100 25,252 -63,277 -71.48 1,505 -74.72 0.0005
2021-05-14 2021-03-31 13F FASTLY CLA 31188V100 88,529 9,310 11.75 5,954 -14.01 0.0020
2021-03-08 2020-12-31 13F/A-2 FASTLY CLA 31188V100 79,219 42,912 118.19 6,924 103.59 0.0025
2021-02-11 2020-12-31 13F FASTLY CLA 31188V100 79,219 42,912 6,924 2,500.5808
2020-11-12 2020-09-30 13F FASTLY CLA 31188V100 36,307 36,307 3,401 0.0014
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.