Who owns PRMB (PRMB)
Which tracked institutional funds hold PRMB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PRMB 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
127 tracked funds added or opened PRMB while 76 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
PRMB’s largest tracked holder by dollar value, One Rock Capital Partners, LLC, sizes it at 100.0% of its own reported 13F book, while the median holder sizes it at 0.2% of theirs — a 99.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in PRMB 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 343 tracked filers holding PRMB, 193 increased or opened the position and 169 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 PRMB 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 25
- Sachem Head Capital Management LP$322M
- VANGUARD PORTFOLIO MANAGEMENT LLC$213M
- VANGUARD CAPITAL MANAGEMENT LLC$203M
- COOPER CREEK PARTNERS MANAGEMENT LLC$34M
- VANGUARD FIDUCIARY TRUST CO$29M
- Madison Avenue Partners, LP$25M
Full exits 32
- VANGUARD GROUP INC$369M
- MAPLELANE CAPITAL, LLC$43M
- Qube Research & Technologies Ltd$23M
- Troluce Capital Advisors LLC$16M
- Holocene Advisors, LP$13M
- CANADA PENSION PLAN INVESTMENT BOARD$11M
Largest adds
- One Rock Capital Partners, LLC$288M
- SAMLYN CAPITAL, LLC$249M
- Palestra Capital Management LLC$105M
- AMERIPRISE FINANCIAL INC$61M
- Allspring Global Investments Holdings, LLC$61M
- DEPRINCE RACE & ZOLLO INC$61M
Largest trims
- JANE STREET GROUP, LLC$82M
- Alyeska Investment Group, L.P.$71M
- Boston Partners$66M
- Squarepoint Ops LLC$51M
- FMR LLC$46M
- GOLDMAN SACHS GROUP INC$44M
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 |
|---|---|---|---|---|
| One Rock Capital Partners, LLC | 116,210,806 | $2.2B | 23.1% | 2026-Q1 |
| FMR LLC trimmed | 29,023,789 | $547M | 5.8% | 2026-Q1 |
| Sachem Head Capital Management LP new | 17,095,000 | $322M | 3.4% | 2026-Q1 |
| SAMLYN CAPITAL, LLC added | 16,629,599 | $313M | 3.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 14,625,008 | $275M | 2.9% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 14,123,269 | $266M | 2.8% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC added | 13,056,192 | $246M | 2.6% | 2026-Q1 |
| BlackRock, Inc. added | 11,560,491 | $218M | 2.3% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 11,305,725 | $213M | 2.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 10,756,139 | $203M | 2.1% | 2026-Q1 |
| Palestra Capital Management LLC added | 9,049,878 | $170M | 1.8% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 8,369,420 | $158M | 1.7% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC added | 7,050,888 | $133M | 1.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 6,067,351 | $114M | 1.2% | 2026-Q1 |
| Pertento Partners LLP added | 5,300,018 | $100M | 1.1% | 2026-Q1 |
| KBC Group NV added | 5,041,625 | $95M | 1.0% | 2026-Q1 |
| STATE STREET CORP added | 4,502,632 | $85M | 0.9% | 2026-Q1 |
| NORGES BANK trimmed | 2,322,407 | $82M | 0.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 4,302,882 | $81M | 0.9% | 2026-Q1 |
| DEPRINCE RACE & ZOLLO INC added | 3,833,041 | $72M | 0.8% | 2026-Q1 |
| M.D. Sass, LLC trimmed | 3,383,017 | $64M | 0.7% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,970,766 | $56M | 0.6% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 2,942,806 | $54M | 0.6% | 2026-Q1 |
| Rubric Capital Management LP trimmed | 2,782,404 | $52M | 0.6% | 2026-Q1 |
| Park West Asset Management LLC added | 2,714,892 | $51M | 0.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 2,513,099 | $47M | 0.5% | 2026-Q1 |
| Clearline Capital LP trimmed | 2,283,333 | $43M | 0.5% | 2026-Q1 |
| BAMCO INC /NY/ trimmed | 2,186,585 | $41M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 2,025,545 | $38M | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 1,918,540 | $36M | 0.4% | 2026-Q1 |
| Gotham Asset Management, LLC added | 1,901,227 | $36M | 0.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,806,622 | $34M | 0.4% | 2026-Q1 |
| COOPER CREEK PARTNERS MANAGEMENT LLC new | 1,787,282 | $34M | 0.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,786,703 | $34M | 0.4% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 1,621,870 | $31M | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 1,580,639 | $30M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 1,540,138 | $29M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 1,525,987 | $29M | 0.3% | 2026-Q1 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 1,444,496 | $27M | 0.3% | 2026-Q1 |
| Simcoe Capital Management, LLC | 1,426,785 | $27M | 0.3% | 2026-Q1 |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT trimmed | 1,399,700 | $26M | 0.3% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC added | 1,378,706 | $26M | 0.3% | 2026-Q1 |
| Madison Avenue Partners, LP new | 1,321,942 | $25M | 0.3% | 2026-Q1 |
| Clarkston Capital Partners, LLC trimmed | 1,316,352 | $25M | 0.3% | 2026-Q1 |
| TORONTO DOMINION BANK new | 1,300,676 | $24M | 0.3% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,235,444 | $23M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,209,732 | $23M | 0.2% | 2026-Q1 |
| BWCP, LP added | 1,175,611 | $22M | 0.2% | 2026-Q1 |
| Boston Partners trimmed | 1,141,522 | $21M | 0.2% | 2026-Q1 |
| SEI INVESTMENTS CO added | 1,090,509 | $21M | 0.2% | 2026-Q1 |
| Legal & General Group Plc added | 1,089,963 | $21M | 0.2% | 2026-Q1 |
| Man Group plc trimmed | 1,005,723 | $19M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 945,224 | $18M | 0.2% | 2026-Q1 |
| HEARTLAND ADVISORS INC added | 875,411 | $16M | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 862,348 | $16M | 0.2% | 2026-Q1 |
| NEUMEIER POMA INVESTMENT COUNSEL LLC trimmed | 845,925 | $16M | 0.2% | 2026-Q1 |
| Coliseum Capital Management, LLC trimmed | 812,136 | $15M | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 796,295 | $15M | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp added | 774,190 | $15M | 0.2% | 2026-Q1 |
| Aberdeen Group plc added | 751,059 | $14M | 0.1% | 2026-Q1 |
| Bayberry Capital Partners LP trimmed | 740,700 | $14M | 0.1% | 2026-Q1 |
| Zimmer Partners, LP trimmed | 717,000 | $14M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 696,839 | $13M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 668,915 | $13M | 0.1% | 2026-Q1 |
| KETTLE HILL CAPITAL MANAGEMENT, LLC added | 588,618 | $11M | 0.1% | 2026-Q1 |
| FIDUCIENT ADVISORS LLC | 584,731 | $11M | 0.1% | 2026-Q1 |
| VIKING GLOBAL INVESTORS LP added | 23,033,970 | $509M | 5.4% | 2025-Q3 stale |
| VANGUARD GROUP INC added | 22,562,380 | $369M | 3.9% | 2025-Q4 stale |
| D1 Capital Partners L.P. added | 11,814,815 | $261M | 2.8% | 2025-Q3 stale |
| EMINENCE CAPITAL, LP added | 7,019,075 | $249M | 2.6% | 2025-Q1 stale |
| Third Point LLC | 5,775,000 | $128M | 1.3% | 2025-Q3 stale |
| AXIOM INVESTORS LLC /DE new | 3,242,619 | $115M | 1.2% | 2025-Q1 stale |
| Senator Investment Group LP added | 2,201,798 | $78M | 0.8% | 2025-Q1 stale |
| Artisan Partners Limited Partnership new | 2,050,887 | $73M | 0.8% | 2025-Q1 stale |
| MANE GLOBAL CAPITAL MANAGEMENT LP new | 1,996,593 | $71M | 0.7% | 2025-Q1 stale |
| MAPLELANE CAPITAL, LLC trimmed | 2,610,000 | $43M | 0.5% | 2025-Q4 stale |
| SCOPUS ASSET MANAGEMENT, L.P. trimmed | 1,105,101 | $33M | 0.3% | 2025-Q2 stale |
| ExodusPoint Capital Management, LP added | 1,362,478 | $30M | 0.3% | 2025-Q3 stale |
| Qube Research & Technologies Ltd trimmed | 1,412,395 | $23M | 0.2% | 2025-Q4 stale |
| SOROS FUND MANAGEMENT LLC added | 759,800 | $23M | 0.2% | 2025-Q2 stale |
| Burkehill Global Management, LP trimmed | 1,000,000 | $22M | 0.2% | 2025-Q3 stale |
| Southpoint Capital Advisors LP trimmed | 1,000,000 | $22M | 0.2% | 2025-Q3 stale |
| Newbrook Capital Advisors LP trimmed | 740,238 | $22M | 0.2% | 2025-Q2 stale |
| Monashee Investment Management LLC new | 560,000 | $20M | 0.2% | 2025-Q1 stale |
| OBERWEIS ASSET MANAGEMENT INC/ trimmed | 611,300 | $18M | 0.2% | 2025-Q2 stale |
| Driehaus Capital Management LLC new | 508,507 | $18M | 0.2% | 2025-Q1 stale |
| Nitorum Capital, L.P. trimmed | 807,547 | $18M | 0.2% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC new | 576,123 | $17M | 0.2% | 2025-Q2 stale |
| LTS One Management LP new | 460,000 | $16M | 0.2% | 2025-Q1 stale |
| Troluce Capital Advisors LLC added | 956,000 | $16M | 0.2% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 704,519 | $16M | 0.2% | 2025-Q3 stale |
| PINNBROOK CAPITAL MANAGEMENT LP added | 496,451 | $15M | 0.2% | 2025-Q2 stale |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 612,642 | $14M | 0.1% | 2025-Q3 stale |
| MOORE CAPITAL MANAGEMENT, LP trimmed | 611,117 | $14M | 0.1% | 2025-Q3 stale |
| Holocene Advisors, LP trimmed | 815,009 | $13M | 0.1% | 2025-Q4 stale |
| LORD, ABBETT & CO. LLC trimmed | 441,214 | $13M | 0.1% | 2025-Q2 stale |
| Trexquant Investment LP new | 433,497 | $13M | 0.1% | 2025-Q2 stale |
| READYSTATE ASSET MANAGEMENT LP new | 357,700 | $13M | 0.1% | 2025-Q1 stale |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 679,000 | $11M | 0.1% | 2025-Q4 stale |
| SEVEN GRAND MANAGERS, LLC trimmed | 500,000 | $11M | 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.