Who owns Fastly (FSLY)
Which tracked institutional funds hold FSLY, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See FSLY company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
FSLY’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes FSLY more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in FSLY divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, we do not read how tracked institutions changed their FSLY positions: many holders could not be matched across the two filings, most often because the security’s identifier changed and our mapping is incomplete, or because funds are still filing for the newer quarter. Over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 15,222,887 | $279M | 10.9% | 2026-Q2 |
| FMR LLC added | 11,892,230 | $218M | 8.5% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 9,814,704 | $180M | 7.0% | 2026-Q2 |
| Capital World Investors added | 8,228,136 | $151M | 5.9% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 7,681,005 | $141M | 5.5% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 6,616,726 | $121M | 4.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 6,314,616 | $116M | 4.5% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 6,062,511 | $111M | 4.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 4,366,475 | $80M | 3.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,910,461 | $72M | 2.8% | 2026-Q2 |
| STATE STREET CORP added | 3,537,037 | $65M | 2.5% | 2026-Q2 |
| Alyeska Investment Group, L.P. trimmed | 3,165,326 | $58M | 2.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 3,064,798 | $56M | 2.2% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 2,599,187 | $48M | 1.9% | 2026-Q2 |
| Driehaus Capital Management LLC added | 2,544,406 | $47M | 1.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 2,483,043 | $46M | 1.8% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 2,437,955 | $45M | 1.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,289,082 | $42M | 1.6% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 2,190,081 | $40M | 1.6% | 2026-Q2 |
| MORGAN STANLEY added | 2,086,595 | $38M | 1.5% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 1,934,718 | $36M | 1.4% | 2026-Q2 |
| Nuveen, LLC trimmed | 1,818,532 | $33M | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,754,987 | $32M | 1.3% | 2026-Q2 |
| Divisadero Street Capital Management, LP added | 1,694,262 | $31M | 1.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,515,181 | $28M | 1.1% | 2026-Q2 |
| JUPITER ASSET MANAGEMENT LTD added | 1,439,479 | $26M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,250,580 | $23M | 0.9% | 2026-Q2 |
| UBS Group AG trimmed | 1,074,879 | $20M | 0.8% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,060,876 | $19M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 1,051,020 | $19M | 0.8% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 901,620 | $16M | 0.6% | 2026-Q2 |
| Trexquant Investment LP added | 896,132 | $16M | 0.6% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ trimmed | 852,322 | $16M | 0.6% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 800,346 | $15M | 0.6% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ new | 716,933 | $13M | 0.5% | 2026-Q2 |
| Bank of New York Mellon Corp added | 711,866 | $13M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 687,242 | $13M | 0.5% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 642,323 | $12M | 0.5% | 2026-Q2 |
| GMT Capital Corp | 598,800 | $11M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 596,285 | $11M | 0.4% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 591,109 | $11M | 0.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP new | 473,659 | $9M | 0.3% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 459,283 | $8M | 0.3% | 2026-Q2 |
| Counterpoint Mutual Funds LLC added | 437,894 | $8M | 0.3% | 2026-Q2 |
| Pier Capital, LLC new | 394,654 | $7M | 0.3% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 393,785 | $7M | 0.3% | 2026-Q2 |
| BARCLAYS PLC added | 375,958 | $7M | 0.3% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 354,126 | $7M | 0.3% | 2026-Q2 |
| IMC-Chicago, LLC added | 341,210 | $6M | 0.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 336,786 | $6M | 0.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 324,200 | $6M | 0.2% | 2026-Q2 |
| Invesco Ltd. trimmed | 307,576 | $6M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 301,653 | $6M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 274,200 | $5M | 0.2% | 2026-Q2 |
| Relyea Zuckerberg Hanson LLC trimmed | 257,338 | $5M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 252,032 | $5M | 0.2% | 2026-Q2 |
| Jump Financial, LLC trimmed | 226,934 | $4M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 213,043 | $4M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 198,248 | $6M | 0.2% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 196,130 | $4M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 195,249 | $4M | 0.1% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC new | 195,230 | $4M | 0.1% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 192,625 | $4M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 186,331 | $3M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 176,620 | $3M | 0.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 165,611 | $3M | 0.1% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 164,334 | $3M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 159,732 | $3M | 0.1% | 2026-Q2 |
| HUSSMAN STRATEGIC ADVISORS, INC. added | 147,000 | $3M | 0.1% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 132,551 | $2M | 0.1% | 2026-Q2 |
| GROUP ONE TRADING LLC added | 113,867 | $2M | 0.1% | 2026-Q2 |
| Creative Planning trimmed | 109,109 | $2M | 0.1% | 2026-Q2 |
| Knights of Columbus Asset Advisors LLC added | 107,174 | $2M | 0.1% | 2026-Q2 |
| G2 Investment Partners Management LLC trimmed | 105,000 | $2M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 100,571 | $2M | 0.1% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 93,518 | $2M | 0.1% | 2026-Q2 |
| WESBANCO BANK INC new | 90,000 | $2M | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 89,307 | $2M | 0.1% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 86,161 | $2M | 0.1% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 84,850 | $2M | 0.1% | 2026-Q2 |
| 180 WEALTH ADVISORS, LLC added | 84,718 | $2M | 0.1% | 2026-Q2 |
| MATAURO, LLC new | 81,389 | $1M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 78,869 | $1M | 0.1% | 2026-Q2 |
| Range Financial Group LLC added | 76,933 | $1M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 76,728 | $1M | 0.1% | 2026-Q2 |
| FirstWave Capital Management LLC new | 73,227 | $1M | 0.1% | 2026-Q2 |
| Allianz Asset Management GmbH | 71,707 | $2M | 0.1% | 2026-Q2 |
| LPL Financial LLC trimmed | 69,333 | $1M | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 67,851 | $1M | 0.0% | 2026-Q2 |
| Entropy Technologies, LP added | 67,655 | $1M | 0.0% | 2026-Q2 |
| Jupiter Topco LLC new | 67,050 | $1M | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 66,945 | $1M | 0.0% | 2026-Q2 |
| State of New Jersey Common Pension Fund D new | 65,393 | $1M | 0.0% | 2026-Q2 |
| Vontobel Holding Ltd. new | 60,551 | $1M | 0.0% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP new | 59,158 | $1M | 0.0% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 57,300 | $1M | 0.0% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 57,285 | $1M | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 56,740 | $1M | 0.0% | 2026-Q2 |
| Mirae Asset Global Investments Co., Ltd. trimmed | 56,152 | $1M | 0.0% | 2026-Q2 |
| Williamson Legacy Group, LLC trimmed | 55,861 | $1M | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.