Who owns FSLY (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-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on FSLY is one-sided between 2025-Q4 and 2026-Q1: 181 added or opened and 17 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
FSLY’s largest tracked holder by dollar value, VANGUARD PORTFOLIO MANAGEMENT LLC, 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 2025-Q4 and 2026-Q1, across 340 tracked filers holding FSLY, 229 increased or opened the position and 112 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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
Funds opening or closing a position in FSLY between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 65
- VANGUARD PORTFOLIO MANAGEMENT LLC$320M
- VANGUARD CAPITAL MANAGEMENT LLC$174M
- Capital World Investors$109M
- NORDEA INVESTMENT MANAGEMENT AB$56M
- HRT FINANCIAL LP$45M
- LORD, ABBETT & CO. LLC$40M
Full exits 12
- VANGUARD GROUP INC$162M
- Alyeska Investment Group, L.P.$49M
- TWO SIGMA ADVISERS, LP$18M
- DeepCurrents Investment Group LLC$3M
- Edgestream Partners, L.P.$2M
- PEAK6 LLC$936K
Largest adds
- FMR LLC$236M
- FIRST TRUST ADVISORS LP$169M
- Legal & General Group Plc$147M
- TWO SIGMA INVESTMENTS, LP$131M
- VOYA INVESTMENT MANAGEMENT LLC$104M
- JANE STREET GROUP, LLC$73M
Largest trims
- MORGAN STANLEY$42M
- PRUDENTIAL FINANCIAL INC$11M
- CITADEL ADVISORS LLC$7M
- MARSHALL WACE, LLP$2M
- LAZARD ASSET MANAGEMENT LLC$495K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 11,017,485 | $320M | 8.2% | 2026-Q1 |
| FMR LLC added | 8,478,693 | $246M | 6.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 8,059,757 | $234M | 6.0% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 7,031,952 | $204M | 5.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,997,103 | $174M | 4.5% | 2026-Q1 |
| BlackRock, Inc. trimmed | 5,852,953 | $170M | 4.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 5,614,247 | $163M | 4.2% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 3,930,328 | $114M | 2.9% | 2026-Q1 |
| Capital World Investors new | 3,754,537 | $109M | 2.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 3,577,910 | $104M | 2.7% | 2026-Q1 |
| Penserra Capital Management LLC trimmed | 3,537,970 | $103M | 2.6% | 2026-Q1 |
| STATE STREET CORP added | 3,254,929 | $95M | 2.4% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 3,150,321 | $92M | 2.3% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,741,549 | $80M | 2.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 2,624,057 | $76M | 1.9% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 2,540,660 | $74M | 1.9% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 2,160,547 | $63M | 1.6% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,108,776 | $61M | 1.6% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 2,061,861 | $60M | 1.5% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB new | 2,058,580 | $56M | 1.4% | 2026-Q1 |
| Nuveen, LLC added | 1,863,145 | $54M | 1.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,654,812 | $48M | 1.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 1,545,483 | $45M | 1.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,459,497 | $42M | 1.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,414,618 | $41M | 1.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 1,393,646 | $40M | 1.0% | 2026-Q1 |
| LORD, ABBETT & CO. LLC added | 1,385,315 | $40M | 1.0% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 1,269,369 | $37M | 0.9% | 2026-Q1 |
| UBS Group AG added | 1,232,739 | $36M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,177,040 | $34M | 0.9% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,156,799 | $34M | 0.9% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 1,071,022 | $31M | 0.8% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 1,036,479 | $30M | 0.8% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 923,870 | $27M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 901,656 | $26M | 0.7% | 2026-Q1 |
| Driehaus Capital Management LLC trimmed | 838,328 | $24M | 0.6% | 2026-Q1 |
| Squarepoint Ops LLC added | 825,660 | $24M | 0.6% | 2026-Q1 |
| Invesco Ltd. added | 815,733 | $24M | 0.6% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co trimmed | 733,163 | $21M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 703,753 | $20M | 0.5% | 2026-Q1 |
| SG Americas Securities, LLC added | 685,415 | $20M | 0.5% | 2026-Q1 |
| GMT Capital Corp | 598,800 | $17M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 518,354 | $15M | 0.4% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 514,786 | $15M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 460,314 | $13M | 0.3% | 2026-Q1 |
| Jump Financial, LLC added | 417,600 | $12M | 0.3% | 2026-Q1 |
| BERKSHIRE CAPITAL HOLDINGS INC added | 403,830 | $12M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 448,839 | $12M | 0.3% | 2026-Q1 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC new | 391,481 | $11M | 0.3% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 389,593 | $11M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 413,133 | $11M | 0.3% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 326,745 | $9M | 0.2% | 2026-Q1 |
| IMC-Chicago, LLC added | 315,110 | $9M | 0.2% | 2026-Q1 |
| MASTERS CAPITAL MANAGEMENT LLC new | 300,000 | $9M | 0.2% | 2026-Q1 |
| JUPITER ASSET MANAGEMENT LTD added | 292,861 | $9M | 0.2% | 2026-Q1 |
| PDT Partners, LLC trimmed | 290,072 | $8M | 0.2% | 2026-Q1 |
| G2 Investment Partners Management LLC added | 289,568 | $8M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 305,783 | $8M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 280,900 | $8M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 278,752 | $8M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC trimmed | 273,770 | $8M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 265,253 | $8M | 0.2% | 2026-Q1 |
| Relyea Zuckerberg Hanson LLC trimmed | 259,838 | $8M | 0.2% | 2026-Q1 |
| Proem Advisors LLC trimmed | 259,343 | $8M | 0.2% | 2026-Q1 |
| Tenzing Global Management, LLC added | 250,000 | $7M | 0.2% | 2026-Q1 |
| POLEN CAPITAL MANAGEMENT LLC new | 238,518 | $7M | 0.2% | 2026-Q1 |
| Divisadero Street Capital Management, LP trimmed | 225,000 | $7M | 0.2% | 2026-Q1 |
| Trexquant Investment LP trimmed | 218,808 | $6M | 0.2% | 2026-Q1 |
| D L CARLSON INVESTMENT GROUP INC new | 213,025 | $6M | 0.2% | 2026-Q1 |
| Informed Momentum Co LLC added | 205,508 | $6M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 182,284 | $5M | 0.1% | 2026-Q1 |
| CASTLEARK MANAGEMENT LLC added | 177,688 | $5M | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 176,843 | $5M | 0.1% | 2026-Q1 |
| Gotham Asset Management, LLC added | 175,679 | $5M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 164,446 | $5M | 0.1% | 2026-Q1 |
| SELDON CAPITAL LP new | 151,265 | $4M | 0.1% | 2026-Q1 |
| Creative Planning added | 151,021 | $4M | 0.1% | 2026-Q1 |
| Science & Technology Partners, L.P. new | 151,000 | $4M | 0.1% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 150,212 | $4M | 0.1% | 2026-Q1 |
| OSAIC HOLDINGS, INC. added | 139,761 | $4M | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP added | 134,156 | $4M | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 128,219 | $4M | 0.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 126,409 | $4M | 0.1% | 2026-Q1 |
| OSTERWEIS CAPITAL MANAGEMENT INC new | 125,495 | $4M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 115,245 | $3M | 0.1% | 2026-Q1 |
| Neo Ivy Capital Management added | 113,339 | $3M | 0.1% | 2026-Q1 |
| Walleye Capital LLC added | 112,471 | $3M | 0.1% | 2026-Q1 |
| Mirae Asset Global Investments Co., Ltd. added | 110,508 | $3M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 109,311 | $3M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 108,282 | $3M | 0.1% | 2026-Q1 |
| HUSSMAN STRATEGIC ADVISORS, INC. trimmed | 105,000 | $3M | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 102,033 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 15,909,038 | $162M | 4.1% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. added | 4,789,185 | $49M | 1.2% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 1,752,500 | $18M | 0.5% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 678,274 | $6M | 0.1% | 2025-Q3 stale |
| J. Goldman & Co LP added | 797,879 | $5M | 0.1% | 2025-Q1 stale |
| First Eagle Investment Management, LLC trimmed | 541,173 | $4M | 0.1% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC trimmed | 411,801 | $4M | 0.1% | 2025-Q3 stale |
| Caption Management, LLC added | 406,551 | $3M | 0.1% | 2025-Q3 stale |
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.