Who owns PUMP (PUMP)
Which tracked institutional funds hold PUMP, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PUMP 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 PUMP is one-sided between 2025-Q4 and 2026-Q1: 125 added or opened and 24 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
PUMP’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 PUMP more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PUMP 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 254 tracked filers holding PUMP, 158 increased or opened the position and 97 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 PUMP 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 38
- VANGUARD CAPITAL MANAGEMENT LLC$63M
- COOPER CREEK PARTNERS MANAGEMENT LLC$43M
- VANGUARD PORTFOLIO MANAGEMENT LLC$39M
- Situational Awareness Partners LP$13M
- Fulcrum Asset Management LLP$12M
- BWCP, LP$12M
Full exits 13
- VANGUARD GROUP INC$50M
- Forest Avenue Capital Management LP$15M
- Shellback Capital, LP$7M
- TWO SIGMA ADVISERS, LP$5M
- Alyeska Investment Group, L.P.$2M
- Interval Partners, LP$2M
Largest adds
- BlackRock, Inc.$55M
- DIMENSIONAL FUND ADVISORS LP$40M
- Sourcerock Group LLC$39M
- D. E. Shaw & Co., Inc.$32M
- VAN ECK ASSOCIATES CORP$28M
- MORGAN STANLEY$27M
Largest trims
- Philosophy Capital Management LLC$4M
- Qube Research & Technologies Ltd$4M
- Jefferies Financial Group Inc.$2M
- Trexquant Investment LP$2M
- XTX Topco Ltd$599K
- TOWLE & CO$472K
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 |
|---|---|---|---|---|
| BlackRock, Inc. added | 8,571,318 | $124M | 7.3% | 2026-Q1 |
| Sourcerock Group LLC added | 7,241,813 | $104M | 6.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 6,481,970 | $93M | 5.5% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 4,743,553 | $68M | 4.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 4,356,508 | $63M | 3.7% | 2026-Q1 |
| Valiant Capital Management, L.P. added | 4,042,993 | $58M | 3.5% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 3,846,880 | $55M | 3.3% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 3,449,379 | $50M | 2.9% | 2026-Q1 |
| MORGAN STANLEY added | 3,176,066 | $46M | 2.7% | 2026-Q1 |
| STATE STREET CORP added | 3,054,724 | $44M | 2.6% | 2026-Q1 |
| COOPER CREEK PARTNERS MANAGEMENT LLC added | 2,966,561 | $43M | 2.5% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 2,758,983 | $40M | 2.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,708,217 | $39M | 2.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 2,487,672 | $36M | 2.1% | 2026-Q1 |
| VR Advisory Services Ltd added | 2,464,913 | $36M | 2.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,342,964 | $34M | 2.0% | 2026-Q1 |
| Philosophy Capital Management LLC trimmed | 2,283,573 | $33M | 2.0% | 2026-Q1 |
| Alta Fundamental Advisers LLC trimmed | 1,773,185 | $26M | 1.5% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 1,653,600 | $24M | 1.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,552,869 | $22M | 1.3% | 2026-Q1 |
| Nuveen, LLC added | 1,497,226 | $22M | 1.3% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 1,494,983 | $22M | 1.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 1,425,681 | $21M | 1.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 1,248,889 | $18M | 1.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,168,310 | $17M | 1.0% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 1,144,720 | $16M | 1.0% | 2026-Q1 |
| Empowered Funds, LLC added | 1,130,021 | $16M | 1.0% | 2026-Q1 |
| SOROS CAPITAL MANAGEMENT LLC added | 1,091,081 | $16M | 0.9% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 965,500 | $14M | 0.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 945,030 | $14M | 0.8% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 919,385 | $13M | 0.8% | 2026-Q1 |
| Situational Awareness LP | 910,300 | $13M | 0.8% | 2026-Q1 |
| Situational Awareness Partners LP new | 910,300 | $13M | 0.8% | 2026-Q1 |
| SIR Capital Management, L.P. trimmed | 903,130 | $13M | 0.8% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 895,341 | $13M | 0.8% | 2026-Q1 |
| PKO BP BANKOWY Universal Pension Society JSC added | 862,485 | $12M | 0.7% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 853,808 | $12M | 0.7% | 2026-Q1 |
| Fulcrum Asset Management LLP new | 827,700 | $12M | 0.7% | 2026-Q1 |
| Invesco Ltd. added | 827,704 | $12M | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP added | 806,272 | $12M | 0.7% | 2026-Q1 |
| BWCP, LP new | 800,363 | $12M | 0.7% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 729,650 | $11M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 719,724 | $10M | 0.6% | 2026-Q1 |
| TOWLE & CO trimmed | 676,403 | $10M | 0.6% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 652,400 | $9M | 0.6% | 2026-Q1 |
| Dana Investment Advisors, Inc. trimmed | 633,928 | $9M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 622,456 | $9M | 0.5% | 2026-Q1 |
| SEI INVESTMENTS CO added | 534,059 | $8M | 0.5% | 2026-Q1 |
| Manatuck Hill Partners, LLC added | 525,000 | $8M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 518,750 | $7M | 0.4% | 2026-Q1 |
| First Eagle Investment Management, LLC added | 517,833 | $7M | 0.4% | 2026-Q1 |
| Aventail Capital Group, LP added | 512,456 | $7M | 0.4% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 507,253 | $7M | 0.4% | 2026-Q1 |
| AYAL Capital Advisors Ltd new | 486,000 | $7M | 0.4% | 2026-Q1 |
| TORTOISE CAPITAL ADVISORS, L.L.C. added | 481,294 | $7M | 0.4% | 2026-Q1 |
| FMR LLC added | 476,018 | $7M | 0.4% | 2026-Q1 |
| UBS Group AG added | 474,665 | $7M | 0.4% | 2026-Q1 |
| Ratan Capital Management LP trimmed | 420,481 | $6M | 0.4% | 2026-Q1 |
| Burkehill Global Management, LP new | 400,000 | $6M | 0.3% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 350,478 | $5M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC added | 344,007 | $5M | 0.3% | 2026-Q1 |
| GeoSphere Capital Management, LLC added | 324,369 | $5M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp added | 319,925 | $5M | 0.3% | 2026-Q1 |
| Portolan Capital Management, LLC new | 314,815 | $5M | 0.3% | 2026-Q1 |
| Trexquant Investment LP trimmed | 285,995 | $4M | 0.2% | 2026-Q1 |
| MYDA Advisors LLC trimmed | 275,000 | $4M | 0.2% | 2026-Q1 |
| Lisanti Capital Growth, LLC trimmed | 267,390 | $4M | 0.2% | 2026-Q1 |
| Lighthouse Investment Partners, LLC trimmed | 250,000 | $4M | 0.2% | 2026-Q1 |
| Roubaix Capital, LLC trimmed | 243,257 | $4M | 0.2% | 2026-Q1 |
| Capelight Capital Asset Management LP new | 225,000 | $3M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 206,333 | $3M | 0.2% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 205,684 | $3M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 199,490 | $3M | 0.2% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 188,772 | $3M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 187,800 | $3M | 0.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 182,641 | $3M | 0.2% | 2026-Q1 |
| Voleon Capital Management LP added | 176,335 | $3M | 0.2% | 2026-Q1 |
| PDT Partners, LLC | 175,924 | $3M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 175,782 | $3M | 0.2% | 2026-Q1 |
| Informed Momentum Co LLC trimmed | 168,077 | $2M | 0.1% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. new | 162,208 | $2M | 0.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 161,972 | $2M | 0.1% | 2026-Q1 |
| SG Capital Management LLC new | 150,000 | $2M | 0.1% | 2026-Q1 |
| OP Asset Management Ltd added | 124,611 | $2M | 0.1% | 2026-Q1 |
| OnyxPoint Global Management LP new | 142,046 | $2M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd trimmed | 141,924 | $2M | 0.1% | 2026-Q1 |
| RBF Capital, LLC trimmed | 140,000 | $2M | 0.1% | 2026-Q1 |
| Mutual Advisors, LLC added | 139,827 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,292,774 | $50M | 3.0% | 2025-Q4 stale |
| Forest Avenue Capital Management LP new | 1,531,035 | $15M | 0.9% | 2025-Q4 stale |
| Pacer Advisors, Inc. trimmed | 1,006,926 | $7M | 0.4% | 2025-Q1 stale |
| Shellback Capital, LP new | 697,349 | $7M | 0.4% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 573,300 | $5M | 0.3% | 2025-Q4 stale |
| Grantham, Mayo, Van Otterloo & Co. LLC added | 595,067 | $4M | 0.3% | 2025-Q1 stale |
| Jump Financial, LLC added | 688,013 | $4M | 0.2% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC trimmed | 558,661 | $3M | 0.2% | 2025-Q3 stale |
| PRINCIPAL FINANCIAL GROUP INC added | 482,287 | $3M | 0.2% | 2025-Q2 stale |
| LONESTAR CAPITAL MANAGEMENT LLC added | 400,000 | $2M | 0.1% | 2025-Q2 stale |
| Brandywine Global Investment Management, LLC trimmed | 302,750 | $2M | 0.1% | 2025-Q1 stale |
| Alyeska Investment Group, L.P. trimmed | 224,461 | $2M | 0.1% | 2025-Q4 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.