Who owns ProAssurance (PRA)
Which tracked institutional funds hold PRA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PRA company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-21). 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
58 tracked funds added or opened PRA while 31 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
PRA’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 PRA more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PRA 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 220 tracked filers holding PRA, 121 increased or opened the position and 89 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 PRA 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 16
- VANGUARD PORTFOLIO MANAGEMENT LLC$69M
- VANGUARD CAPITAL MANAGEMENT LLC$55M
- VANGUARD FIDUCIARY TRUST CO$8M
- Atom Investors LP$6M
- TWO SIGMA INVESTMENTS, LP$5M
- TEACHER RETIREMENT SYSTEM OF TEXAS$4M
Full exits 10
- VANGUARD GROUP INC$128M
- Carmignac Gestion$5M
- JANE STREET GROUP, LLC$3M
- NEW YORK STATE TEACHERS RETIREMENT SYSTEM$2M
- AlphaQuest LLC$1M
- Weiss Asset Management LP$966K
Largest adds
- GLAZER CAPITAL, LLC$33M
- RENAISSANCE TECHNOLOGIES LLC$21M
- HSBC HOLDINGS PLC$14M
- MILLENNIUM MANAGEMENT LLC$8M
- Amundi$7M
- GOLDMAN SACHS GROUP INC$7M
Largest trims
- BlackRock, Inc.$43M
- DIMENSIONAL FUND ADVISORS LP$30M
- BALYASNY ASSET MANAGEMENT L.P.$13M
- Man Group plc$10M
- JANUS HENDERSON GROUP PLC$9M
- LMR Partners LLP$7M
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. trimmed | 5,383,115 | $133M | 9.5% | 2026-Q1 |
| Magnetar Financial LLC trimmed | 3,246,435 | $80M | 5.8% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,781,007 | $69M | 4.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,240,875 | $55M | 4.0% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 2,034,155 | $49M | 3.5% | 2026-Q1 |
| STATE STREET CORP added | 1,901,188 | $47M | 3.4% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 1,573,422 | $39M | 2.8% | 2026-Q1 |
| GLAZER CAPITAL, LLC added | 1,546,643 | $38M | 2.7% | 2026-Q1 |
| Westchester Capital Management, LLC trimmed | 1,455,041 | $36M | 2.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,442,782 | $36M | 2.6% | 2026-Q1 |
| MORGAN STANLEY added | 1,438,224 | $36M | 2.5% | 2026-Q1 |
| NEXPOINT ASSET MANAGEMENT, L.P. added | 1,416,581 | $35M | 2.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,211,429 | $30M | 2.1% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 1,198,279 | $30M | 2.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,085,920 | $27M | 1.9% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 964,900 | $24M | 1.7% | 2026-Q1 |
| ALPINE ASSOCIATES MANAGEMENT INC. added | 945,590 | $23M | 1.7% | 2026-Q1 |
| MARSHALL WACE, LLP added | 832,603 | $21M | 1.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 769,903 | $19M | 1.4% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC trimmed | 678,775 | $17M | 1.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 656,614 | $16M | 1.2% | 2026-Q1 |
| Hudson Bay Capital Management LP | 575,000 | $14M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 546,089 | $13M | 1.0% | 2026-Q1 |
| AQR Arbitrage LLC added | 543,904 | $13M | 1.0% | 2026-Q1 |
| Amundi added | 538,650 | $13M | 1.0% | 2026-Q1 |
| FIL Ltd | 508,995 | $13M | 0.9% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 488,074 | $12M | 0.9% | 2026-Q1 |
| LMR Partners LLP trimmed | 462,089 | $11M | 0.8% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 450,212 | $11M | 0.8% | 2026-Q1 |
| Groupe la Francaise added | 438,577 | $11M | 0.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 421,668 | $10M | 0.7% | 2026-Q1 |
| UBS Group AG added | 420,751 | $10M | 0.7% | 2026-Q1 |
| GARDNER LEWIS ASSET MANAGEMENT L P added | 409,604 | $10M | 0.7% | 2026-Q1 |
| PSquared Asset Management AG added | 368,059 | $9M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 331,177 | $8M | 0.6% | 2026-Q1 |
| Man Group plc trimmed | 329,837 | $8M | 0.6% | 2026-Q1 |
| CREDIT INDUSTRIEL ET COMMERCIAL trimmed | 294,874 | $7M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 293,581 | $7M | 0.5% | 2026-Q1 |
| THIRD AVENUE MANAGEMENT LLC trimmed | 260,608 | $6M | 0.5% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 249,891 | $6M | 0.4% | 2026-Q1 |
| Dana Investment Advisors, Inc. trimmed | 241,452 | $6M | 0.4% | 2026-Q1 |
| Atom Investors LP new | 230,051 | $6M | 0.4% | 2026-Q1 |
| Invesco Ltd. added | 204,729 | $5M | 0.4% | 2026-Q1 |
| Squarepoint Ops LLC added | 202,097 | $5M | 0.4% | 2026-Q1 |
| Polar Asset Management Partners Inc. added | 198,586 | $5M | 0.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 196,698 | $5M | 0.3% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 192,219 | $5M | 0.3% | 2026-Q1 |
| GABELLI FUNDS LLC added | 188,634 | $5M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 183,899 | $5M | 0.3% | 2026-Q1 |
| GABELLI & Co INVESTMENT ADVISERS, INC. added | 177,815 | $4M | 0.3% | 2026-Q1 |
| ABC ARBITRAGE SA trimmed | 169,272 | $4M | 0.3% | 2026-Q1 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 168,774 | $4M | 0.3% | 2026-Q1 |
| Skandinaviska Enskilda Banken AB (publ) added | 164,878 | $4M | 0.3% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 164,247 | $4M | 0.3% | 2026-Q1 |
| FMR LLC added | 161,970 | $4M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 146,657 | $4M | 0.3% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 134,920 | $3M | 0.2% | 2026-Q1 |
| Legal & General Group Plc added | 128,222 | $3M | 0.2% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC added | 126,390 | $3M | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 125,538 | $3M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 118,430 | $3M | 0.2% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 118,038 | $3M | 0.2% | 2026-Q1 |
| Nuveen, LLC trimmed | 110,717 | $3M | 0.2% | 2026-Q1 |
| New York Life Investment Management LLC trimmed | 109,413 | $3M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 101,341 | $3M | 0.2% | 2026-Q1 |
| Vazirani Asset Management LLC new | 100,000 | $2M | 0.2% | 2026-Q1 |
| Swiss National Bank trimmed | 96,600 | $2M | 0.2% | 2026-Q1 |
| OMERS ADMINISTRATION Corp added | 93,600 | $2M | 0.2% | 2026-Q1 |
| CSS LLC/IL added | 72,317 | $2M | 0.1% | 2026-Q1 |
| Smith Thornton Advisors LLC trimmed | 66,500 | $2M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 65,333 | $2M | 0.1% | 2026-Q1 |
| Olympiad Research LP | 62,500 | $2M | 0.1% | 2026-Q1 |
| CAXTON ASSOCIATES LLP new | 62,422 | $2M | 0.1% | 2026-Q1 |
| Trexquant Investment LP trimmed | 58,677 | $1M | 0.1% | 2026-Q1 |
| Kintayl Capital LP added | 56,855 | $1M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 54,546 | $1M | 0.1% | 2026-Q1 |
| Mint Tower Capital Management B.V. added | 53,023 | $1M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 52,071 | $1M | 0.1% | 2026-Q1 |
| Savant Capital, LLC added | 51,999 | $1M | 0.1% | 2026-Q1 |
| WATER ISLAND CAPITAL LLC added | 51,103 | $1M | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 49,978 | $1M | 0.1% | 2026-Q1 |
| Caption Management, LLC added | 49,385 | $1M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 47,961 | $1M | 0.1% | 2026-Q1 |
| INTECH INVESTMENT MANAGEMENT LLC added | 47,865 | $1M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,299,454 | $128M | 9.2% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 786,769 | $18M | 1.3% | 2025-Q1 stale |
| TIG Advisors, LLC trimmed | 488,973 | $12M | 0.8% | 2025-Q3 stale |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 493,550 | $12M | 0.8% | 2025-Q1 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 492,566 | $11M | 0.8% | 2025-Q2 stale |
| Carmignac Gestion | 217,263 | $5M | 0.4% | 2025-Q4 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 164,897 | $4M | 0.3% | 2025-Q3 stale |
| TUDOR INVESTMENT CORP ET AL trimmed | 137,765 | $3M | 0.2% | 2025-Q1 stale |
| JANE STREET GROUP, LLC added | 114,232 | $3M | 0.2% | 2025-Q4 stale |
| Eisler Capital Management Ltd. added | 100,881 | $2M | 0.2% | 2025-Q2 stale |
| Brandywine Global Investment Management, LLC trimmed | 96,330 | $2M | 0.2% | 2025-Q2 stale |
| ClearAlpha Technologies LP new | 88,000 | $2M | 0.1% | 2025-Q1 stale |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 80,473 | $2M | 0.1% | 2025-Q4 stale |
| Wakefield Asset Management LLLP added | 70,519 | $2M | 0.1% | 2025-Q1 stale |
| Morningstar Investment Management LLC new | 66,123 | $2M | 0.1% | 2025-Q3 stale |
| BCK Capital Management LP trimmed | 56,589 | $1M | 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.