Who owns American Coastal Insurance Corporation (ACIC)
Which tracked institutional funds hold ACIC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ACIC 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
25 tracked funds added or opened ACIC while 21 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
ACIC’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 ACIC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ACIC 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 149 tracked filers holding ACIC, 90 increased or opened the position and 65 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 ACIC 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 10
- VANGUARD CAPITAL MANAGEMENT LLC$11M
- VANGUARD PORTFOLIO MANAGEMENT LLC$3M
- Militia Capital Management LLC$2M
- VANGUARD FIDUCIARY TRUST CO$2M
- JANE STREET GROUP, LLC$1M
- FRANKLIN RESOURCES INC$1M
Full exits 7
- VANGUARD GROUP INC$17M
- Militia Capital Partners, LP$2M
- Brandywine Global Investment Management, LLC$1M
- TWO SIGMA ADVISERS, LP$678K
- CITADEL ADVISORS LLC$662K
- Squarepoint Ops LLC$660K
Largest adds
- TWO SIGMA INVESTMENTS, LP$4M
- SEI INVESTMENTS CO$3M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$3M
- BRIDGEWAY CAPITAL MANAGEMENT, LLC$1M
- Empyrean Capital Partners, LP$800K
- AQR CAPITAL MANAGEMENT LLC$791K
Largest trims
- DG Capital Management, LLC$8M
- BlackRock, Inc.$3M
- JPMORGAN CHASE & CO$1M
- MILLENNIUM MANAGEMENT LLC$1M
- Tieton Capital Management, LLC$1M
- GSA CAPITAL PARTNERS LLP$899K
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 | 1,828,264 | $21M | 9.1% | 2026-Q1 |
| Tieton Capital Management, LLC added | 1,273,455 | $14M | 6.3% | 2026-Q1 |
| Empyrean Capital Partners, LP added | 1,126,987 | $13M | 5.6% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 996,641 | $11M | 4.9% | 2026-Q1 |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. added | 808,705 | $9M | 4.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 750,108 | $8M | 3.7% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 719,437 | $8M | 3.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 615,861 | $7M | 3.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 601,481 | $7M | 3.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 564,754 | $6M | 2.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 539,257 | $6M | 2.7% | 2026-Q1 |
| STATE STREET CORP added | 505,827 | $6M | 2.5% | 2026-Q1 |
| DG Capital Management, LLC trimmed | 465,287 | $5M | 2.3% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 317,891 | $4M | 1.6% | 2026-Q1 |
| Empowered Funds, LLC added | 308,656 | $3M | 1.5% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 288,251 | $3M | 1.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 271,787 | $3M | 1.3% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 216,156 | $2M | 1.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 214,786 | $2M | 1.1% | 2026-Q1 |
| Militia Capital Management LLC new | 200,658 | $2M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 193,422 | $2M | 1.0% | 2026-Q1 |
| Crews Bank & Trust | 189,075 | $2M | 0.9% | 2026-Q1 |
| MARSHALL WACE, LLP added | 178,758 | $2M | 0.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 171,796 | $2M | 0.9% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 162,200 | $2M | 0.8% | 2026-Q1 |
| ANTIPODES PARTNERS Ltd added | 156,567 | $2M | 0.8% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 151,148 | $2M | 0.8% | 2026-Q1 |
| WESTWOOD HOLDINGS GROUP INC trimmed | 148,735 | $2M | 0.7% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 147,797 | $2M | 0.7% | 2026-Q1 |
| Kennondale Capital Management LLC added | 146,782 | $2M | 0.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 134,164 | $2M | 0.7% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 127,078 | $1M | 0.6% | 2026-Q1 |
| MORGAN STANLEY added | 116,566 | $1M | 0.6% | 2026-Q1 |
| MERCER GLOBAL ADVISORS INC /ADV added | 110,434 | $1M | 0.5% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 109,070 | $1M | 0.5% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 95,208 | $1M | 0.5% | 2026-Q1 |
| Range Financial Group LLC new | 93,380 | $1M | 0.5% | 2026-Q1 |
| UBS Group AG added | 93,329 | $1M | 0.5% | 2026-Q1 |
| Lido Advisors, LLC trimmed | 90,443 | $1M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 88,666 | $997K | 0.4% | 2026-Q1 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 83,776 | $942K | 0.4% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 82,595 | $929K | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 79,082 | $890K | 0.4% | 2026-Q1 |
| M Holdings Securities, Inc. | 83,186 | $846K | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 71,922 | $809K | 0.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 70,138 | $789K | 0.3% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 63,632 | $716K | 0.3% | 2026-Q1 |
| Beacon Pointe Advisors, LLC | 62,372 | $702K | 0.3% | 2026-Q1 |
| Nuveen, LLC trimmed | 59,442 | $669K | 0.3% | 2026-Q1 |
| Pacific Ridge Capital Partners, LLC new | 56,527 | $636K | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 48,419 | $545K | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 45,190 | $511K | 0.2% | 2026-Q1 |
| Farther Finance Advisors, LLC trimmed | 41,747 | $459K | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 40,135 | $452K | 0.2% | 2026-Q1 |
| Cornerstone Wealth Group, LLC trimmed | 2,886 | $439K | 0.2% | 2026-Q1 |
| STRS OHIO | 38,700 | $435K | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 32,540 | $411K | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD | 36,500 | $411K | 0.2% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 35,791 | $403K | 0.2% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC new | 32,863 | $370K | 0.2% | 2026-Q1 |
| CIBC WORLD MARKET INC. new | 31,926 | $359K | 0.2% | 2026-Q1 |
| Arcus Capital Partners, LLC added | 31,635 | $356K | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 29,453 | $331K | 0.1% | 2026-Q1 |
| REGIONS FINANCIAL CORP | 29,444 | $331K | 0.1% | 2026-Q1 |
| Campbell & CO Investment Adviser LLC new | 27,459 | $309K | 0.1% | 2026-Q1 |
| Cox Capital Mgt LLC | 25,322 | $285K | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 25,090 | $282K | 0.1% | 2026-Q1 |
| RITHOLTZ WEALTH MANAGEMENT new | 24,842 | $279K | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP new | 23,931 | $269K | 0.1% | 2026-Q1 |
| FIFTH THIRD BANCORP new | 23,670 | $266K | 0.1% | 2026-Q1 |
| Welch Group, LLC | 23,288 | $262K | 0.1% | 2026-Q1 |
| Creative Planning added | 23,080 | $260K | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP added | 22,742 | $256K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 1,352,675 | $17M | 7.5% | 2025-Q4 stale |
| Bastion Asset Management Inc. added | 373,073 | $4M | 1.9% | 2025-Q2 stale |
| Militia Capital Partners, LP trimmed | 180,658 | $2M | 1.0% | 2025-Q4 stale |
| Brandywine Global Investment Management, LLC added | 111,470 | $1M | 0.6% | 2025-Q4 stale |
| D. E. Shaw & Co., Inc. trimmed | 119,710 | $1M | 0.6% | 2025-Q3 stale |
| Harvest Investment Services, LLC new | 8,734 | $1M | 0.6% | 2025-Q1 stale |
| 1832 Asset Management L.P. new | 107,300 | $1M | 0.5% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC trimmed | 68,245 | $777K | 0.3% | 2025-Q3 stale |
| Jump Financial, LLC added | 60,700 | $691K | 0.3% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP trimmed | 53,700 | $678K | 0.3% | 2025-Q4 stale |
| CITADEL ADVISORS LLC trimmed | 52,380 | $662K | 0.3% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 52,231 | $660K | 0.3% | 2025-Q4 stale |
| ALPS ADVISORS INC added | 41,695 | $527K | 0.2% | 2025-Q4 stale |
| PRUDENTIAL FINANCIAL INC trimmed | 45,680 | $508K | 0.2% | 2025-Q2 stale |
| Verition Fund Management LLC added | 35,568 | $449K | 0.2% | 2025-Q4 stale |
| Point72 Asset Management, L.P. added | 35,483 | $448K | 0.2% | 2025-Q4 stale |
| Empirical Finance, LLC new | 37,186 | $430K | 0.2% | 2025-Q1 stale |
| ExodusPoint Capital Management, LP trimmed | 31,256 | $395K | 0.2% | 2025-Q4 stale |
| Corient Private Wealth LLC | 30,001 | $379K | 0.2% | 2025-Q4 stale |
| WINTON GROUP Ltd trimmed | 31,812 | $368K | 0.2% | 2025-Q1 stale |
| Quantbot Technologies LP added | 32,374 | $360K | 0.2% | 2025-Q2 stale |
| Magnetar Financial LLC new | 29,980 | $333K | 0.1% | 2025-Q2 stale |
| Trexquant Investment LP added | 23,034 | $291K | 0.1% | 2025-Q4 stale |
| EntryPoint Capital, LLC added | 25,416 | $283K | 0.1% | 2025-Q2 stale |
| Integrated Quantitative Investments LLC trimmed | 24,900 | $277K | 0.1% | 2025-Q2 stale |
| AlphaQuest LLC added | 20,863 | $264K | 0.1% | 2025-Q4 stale |
| FJ Capital Management LLC new | 22,756 | $259K | 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.