Who owns Trustmark Corporation (TRMK)
Which tracked institutional funds hold TRMK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TRMK company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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 TRMK 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
TRMK’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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TRMK 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 270 tracked filers holding TRMK, 136 increased or opened the position and 122 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 TRMK 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 13
- VANGUARD PORTFOLIO MANAGEMENT LLC$149M
- VANGUARD CAPITAL MANAGEMENT LLC$107M
- North Reef Capital Management LP$82M
- VANGUARD FIDUCIARY TRUST CO$16M
- NORGES BANK$4M
- VANGUARD ASSET MANAGEMENT, Ltd$2M
Full exits 11
- VANGUARD GROUP INC$228M
- TWO SIGMA ADVISERS, LP$4M
- RENAISSANCE TECHNOLOGIES LLC$3M
- AlphaQuest LLC$3M
- Point72 Asset Management, L.P.$2M
- Brandywine Global Investment Management, LLC$1M
Largest adds
- AMERICAN CENTURY COMPANIES INC$19M
- DIMENSIONAL FUND ADVISORS LP$13M
- STATE STREET CORP$13M
- GOLDMAN SACHS GROUP INC$13M
- UBS Group AG$11M
- BANK OF AMERICA CORP /DE/$8M
Largest trims
- BlackRock, Inc.$72M
- WELLINGTON MANAGEMENT GROUP LLP$12M
- MILLENNIUM MANAGEMENT LLC$9M
- Verition Fund Management LLC$5M
- TUDOR INVESTMENT CORP ET AL$4M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$3M
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 | 6,112,496 | $258M | 12.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 3,897,556 | $164M | 8.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,524,803 | $149M | 7.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 3,276,965 | $138M | 6.7% | 2026-Q1 |
| STATE STREET CORP added | 2,974,965 | $125M | 6.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,545,422 | $107M | 5.2% | 2026-Q1 |
| EARNEST PARTNERS LLC trimmed | 2,532,602 | $107M | 5.2% | 2026-Q1 |
| North Reef Capital Management LP new | 1,952,930 | $82M | 4.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,514,601 | $64M | 3.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,266,299 | $53M | 2.6% | 2026-Q1 |
| UBS Group AG added | 861,248 | $36M | 1.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 779,069 | $33M | 1.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 730,375 | $31M | 1.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 646,862 | $27M | 1.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 485,987 | $20M | 1.0% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 446,442 | $19M | 0.9% | 2026-Q1 |
| MORGAN STANLEY trimmed | 444,496 | $19M | 0.9% | 2026-Q1 |
| Newport Trust Company, LLC trimmed | 408,564 | $17M | 0.8% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 398,315 | $17M | 0.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 395,702 | $17M | 0.8% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 379,965 | $16M | 0.8% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 376,088 | $16M | 0.8% | 2026-Q1 |
| Nuveen, LLC trimmed | 371,011 | $16M | 0.8% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 370,509 | $16M | 0.8% | 2026-Q1 |
| Clark Capital Management Group, Inc. added | 361,387 | $15M | 0.7% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 351,655 | $15M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 316,772 | $13M | 0.6% | 2026-Q1 |
| TRUSTMARK BANK TRUST DEPARTMENT added | 286,258 | $12M | 0.6% | 2026-Q1 |
| Public Sector Pension Investment Board added | 260,639 | $11M | 0.5% | 2026-Q1 |
| Empowered Funds, LLC added | 254,772 | $11M | 0.5% | 2026-Q1 |
| Invesco Ltd. trimmed | 236,006 | $10M | 0.5% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 165,555 | $7M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 157,264 | $7M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 156,313 | $7M | 0.3% | 2026-Q1 |
| MAGNOLIA CAPITAL ADVISORS LLC added | 152,916 | $6M | 0.3% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 150,707 | $6M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 143,364 | $6M | 0.3% | 2026-Q1 |
| Ignite Planners, LLC added | 142,566 | $6M | 0.3% | 2026-Q1 |
| Hanson & Doremus Investment Management | 139,397 | $6M | 0.3% | 2026-Q1 |
| Legal & General Group Plc trimmed | 133,991 | $6M | 0.3% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 132,548 | $6M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 120,848 | $5M | 0.2% | 2026-Q1 |
| Trexquant Investment LP added | 119,082 | $5M | 0.2% | 2026-Q1 |
| Swiss National Bank | 113,100 | $5M | 0.2% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 106,244 | $4M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 104,903 | $4M | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 95,397 | $4M | 0.2% | 2026-Q1 |
| NORGES BANK trimmed | 108,116 | $4M | 0.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 88,114 | $4M | 0.2% | 2026-Q1 |
| BESSEMER GROUP INC added | 80,207 | $3M | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 69,150 | $3M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC trimmed | 66,640 | $3M | 0.1% | 2026-Q1 |
| HB Wealth Management, LLC trimmed | 66,317 | $3M | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 61,309 | $3M | 0.1% | 2026-Q1 |
| Sterling Capital Management LLC trimmed | 59,045 | $2M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 59,125 | $2M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 54,131 | $2M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 53,079 | $2M | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 52,620 | $2M | 0.1% | 2026-Q1 |
| LPL Financial LLC trimmed | 51,747 | $2M | 0.1% | 2026-Q1 |
| INTECH INVESTMENT MANAGEMENT LLC added | 51,442 | $2M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 51,058 | $2M | 0.1% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 50,837 | $2M | 0.1% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 50,281 | $2M | 0.1% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co trimmed | 47,332 | $2M | 0.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 45,985 | $2M | 0.1% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 44,487 | $2M | 0.1% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 44,045 | $2M | 0.1% | 2026-Q1 |
| Integrated Quantitative Investments LLC added | 43,522 | $2M | 0.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 42,202 | $2M | 0.1% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 42,025 | $2M | 0.1% | 2026-Q1 |
| OPPENHEIMER ASSET MANAGEMENT INC. trimmed | 41,150 | $2M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC added | 39,611 | $2M | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans trimmed | 39,389 | $2M | 0.1% | 2026-Q1 |
| CITIGROUP INC trimmed | 38,960 | $2M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 38,334 | $2M | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 36,499 | $2M | 0.1% | 2026-Q1 |
| Waverly Advisors, LLC added | 36,090 | $2M | 0.1% | 2026-Q1 |
| Wakefield Asset Management LLLP added | 35,415 | $1M | 0.1% | 2026-Q1 |
| BOKF, NA new | 34,080 | $1M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 33,739 | $1M | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 33,128 | $1M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 32,210 | $1M | 0.1% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD | 31,700 | $1M | 0.1% | 2026-Q1 |
| Illinois Municipal Retirement Fund added | 31,519 | $1M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 31,369 | $1M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,846,225 | $228M | 11.0% | 2025-Q4 stale |
| Edgestream Partners, L.P. trimmed | 135,850 | $5M | 0.2% | 2025-Q2 stale |
| TWO SIGMA ADVISERS, LP added | 96,347 | $4M | 0.2% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC added | 93,422 | $4M | 0.2% | 2025-Q3 stale |
| Elizabeth Park Capital Advisors, Ltd. added | 87,071 | $3M | 0.1% | 2025-Q1 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 74,862 | $3M | 0.1% | 2025-Q4 stale |
| AlphaQuest LLC added | 65,095 | $3M | 0.1% | 2025-Q4 stale |
| DARK FOREST CAPITAL MANAGEMENT LP trimmed | 62,062 | $2M | 0.1% | 2025-Q3 stale |
| Advisor Resource Council added | 64,512 | $2M | 0.1% | 2025-Q1 stale |
| Squarepoint Ops LLC trimmed | 51,175 | $2M | 0.1% | 2025-Q3 stale |
| Point72 Asset Management, L.P. added | 47,477 | $2M | 0.1% | 2025-Q4 stale |
| MALTESE CAPITAL MANAGEMENT LLC trimmed | 50,000 | $2M | 0.1% | 2025-Q2 stale |
| JACOBS ASSET MANAGEMENT, LLC trimmed | 47,704 | $2M | 0.1% | 2025-Q2 stale |
| Brandywine Global Investment Management, LLC added | 36,029 | $1M | 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.