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Institutional Ownership · SEC Form 13F

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.

149
Institutional holders
17M
Shares held (tracked funds)
35.2%
Of shares outstanding

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).

FundSharesReported value% of valueQuarter
BlackRock, Inc. trimmed1,828,264$21M9.1%2026-Q1
Tieton Capital Management, LLC added1,273,455$14M6.3%2026-Q1
Empyrean Capital Partners, LP added1,126,987$13M5.6%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new996,641$11M4.9%2026-Q1
PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. added808,705$9M4.0%2026-Q1
DIMENSIONAL FUND ADVISORS LP added750,108$8M3.7%2026-Q1
AMERICAN CENTURY COMPANIES INC added719,437$8M3.6%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added615,861$7M3.1%2026-Q1
SEI INVESTMENTS CO added601,481$7M3.0%2026-Q1
TWO SIGMA INVESTMENTS, LP added564,754$6M2.8%2026-Q1
RENAISSANCE TECHNOLOGIES LLC added539,257$6M2.7%2026-Q1
STATE STREET CORP added505,827$6M2.5%2026-Q1
DG Capital Management, LLC trimmed465,287$5M2.3%2026-Q1
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added317,891$4M1.6%2026-Q1
Empowered Funds, LLC added308,656$3M1.5%2026-Q1
BRIDGEWAY CAPITAL MANAGEMENT, LLC added288,251$3M1.4%2026-Q1
VANGUARD PORTFOLIO MANAGEMENT LLC new271,787$3M1.3%2026-Q1
TUDOR INVESTMENT CORP ET AL added216,156$2M1.1%2026-Q1
AQR CAPITAL MANAGEMENT LLC added214,786$2M1.1%2026-Q1
Militia Capital Management LLC new200,658$2M1.0%2026-Q1
NORTHERN TRUST CORP added193,422$2M1.0%2026-Q1
Crews Bank & Trust189,075$2M0.9%2026-Q1
MARSHALL WACE, LLP added178,758$2M0.9%2026-Q1
GOLDMAN SACHS GROUP INC added171,796$2M0.9%2026-Q1
VANGUARD FIDUCIARY TRUST CO new162,200$2M0.8%2026-Q1
ANTIPODES PARTNERS Ltd added156,567$2M0.8%2026-Q1
JACOBS LEVY EQUITY MANAGEMENT, INC added151,148$2M0.8%2026-Q1
WESTWOOD HOLDINGS GROUP INC trimmed148,735$2M0.7%2026-Q1
Qube Research & Technologies Ltd trimmed147,797$2M0.7%2026-Q1
Kennondale Capital Management LLC added146,782$2M0.7%2026-Q1
MILLENNIUM MANAGEMENT LLC trimmed134,164$2M0.7%2026-Q1
JANE STREET GROUP, LLC added127,078$1M0.6%2026-Q1
MORGAN STANLEY added116,566$1M0.6%2026-Q1
MERCER GLOBAL ADVISORS INC /ADV added110,434$1M0.5%2026-Q1
FRANKLIN RESOURCES INC added109,070$1M0.5%2026-Q1
RAYMOND JAMES FINANCIAL INC added95,208$1M0.5%2026-Q1
Range Financial Group LLC new93,380$1M0.5%2026-Q1
UBS Group AG added93,329$1M0.5%2026-Q1
Lido Advisors, LLC trimmed90,443$1M0.4%2026-Q1
Bank of New York Mellon Corp trimmed88,666$997K0.4%2026-Q1
WEDGE CAPITAL MANAGEMENT L L P/NC added83,776$942K0.4%2026-Q1
Connor, Clark & Lunn Investment Management Ltd. trimmed82,595$929K0.4%2026-Q1
FIRST TRUST ADVISORS LP added79,082$890K0.4%2026-Q1
M Holdings Securities, Inc.83,186$846K0.4%2026-Q1
BANK OF AMERICA CORP /DE/ added71,922$809K0.4%2026-Q1
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed70,138$789K0.3%2026-Q1
MARTINGALE ASSET MANAGEMENT L P added63,632$716K0.3%2026-Q1
Beacon Pointe Advisors, LLC62,372$702K0.3%2026-Q1
Nuveen, LLC trimmed59,442$669K0.3%2026-Q1
Pacific Ridge Capital Partners, LLC new56,527$636K0.3%2026-Q1
SUSQUEHANNA INTERNATIONAL GROUP, LLP added48,419$545K0.2%2026-Q1
JPMORGAN CHASE & CO trimmed45,190$511K0.2%2026-Q1
Farther Finance Advisors, LLC trimmed41,747$459K0.2%2026-Q1
Schonfeld Strategic Advisors LLC added40,135$452K0.2%2026-Q1
Cornerstone Wealth Group, LLC trimmed2,886$439K0.2%2026-Q1
STRS OHIO38,700$435K0.2%2026-Q1
ALLIANCEBERNSTEIN L.P.32,540$411K0.2%2026-Q1
CANADA PENSION PLAN INVESTMENT BOARD36,500$411K0.2%2026-Q1
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added35,791$403K0.2%2026-Q1
MANGROVE PARTNERS IM, LLC new32,863$370K0.2%2026-Q1
CIBC WORLD MARKET INC. new31,926$359K0.2%2026-Q1
Arcus Capital Partners, LLC added31,635$356K0.2%2026-Q1
RHUMBLINE ADVISERS trimmed29,453$331K0.1%2026-Q1
REGIONS FINANCIAL CORP29,444$331K0.1%2026-Q1
Campbell & CO Investment Adviser LLC new27,459$309K0.1%2026-Q1
Cox Capital Mgt LLC25,322$285K0.1%2026-Q1
Invesco Ltd. trimmed25,090$282K0.1%2026-Q1
RITHOLTZ WEALTH MANAGEMENT new24,842$279K0.1%2026-Q1
Quantinno Capital Management LP new23,931$269K0.1%2026-Q1
FIFTH THIRD BANCORP new23,670$266K0.1%2026-Q1
Welch Group, LLC23,288$262K0.1%2026-Q1
Creative Planning added23,080$260K0.1%2026-Q1
Engineers Gate Manager LP added22,742$256K0.1%2026-Q1
VANGUARD GROUP INC added1,352,675$17M7.5%2025-Q4 stale
Bastion Asset Management Inc. added373,073$4M1.9%2025-Q2 stale
Militia Capital Partners, LP trimmed180,658$2M1.0%2025-Q4 stale
Brandywine Global Investment Management, LLC added111,470$1M0.6%2025-Q4 stale
D. E. Shaw & Co., Inc. trimmed119,710$1M0.6%2025-Q3 stale
Harvest Investment Services, LLC new8,734$1M0.6%2025-Q1 stale
1832 Asset Management L.P. new107,300$1M0.5%2025-Q1 stale
Cubist Systematic Strategies, LLC trimmed68,245$777K0.3%2025-Q3 stale
Jump Financial, LLC added60,700$691K0.3%2025-Q3 stale
TWO SIGMA ADVISERS, LP trimmed53,700$678K0.3%2025-Q4 stale
CITADEL ADVISORS LLC trimmed52,380$662K0.3%2025-Q4 stale
Squarepoint Ops LLC added52,231$660K0.3%2025-Q4 stale
ALPS ADVISORS INC added41,695$527K0.2%2025-Q4 stale
PRUDENTIAL FINANCIAL INC trimmed45,680$508K0.2%2025-Q2 stale
Verition Fund Management LLC added35,568$449K0.2%2025-Q4 stale
Point72 Asset Management, L.P. added35,483$448K0.2%2025-Q4 stale
Empirical Finance, LLC new37,186$430K0.2%2025-Q1 stale
ExodusPoint Capital Management, LP trimmed31,256$395K0.2%2025-Q4 stale
Corient Private Wealth LLC30,001$379K0.2%2025-Q4 stale
WINTON GROUP Ltd trimmed31,812$368K0.2%2025-Q1 stale
Quantbot Technologies LP added32,374$360K0.2%2025-Q2 stale
Magnetar Financial LLC new29,980$333K0.1%2025-Q2 stale
Trexquant Investment LP added23,034$291K0.1%2025-Q4 stale
EntryPoint Capital, LLC added25,416$283K0.1%2025-Q2 stale
Integrated Quantitative Investments LLC trimmed24,900$277K0.1%2025-Q2 stale
AlphaQuest LLC added20,863$264K0.1%2025-Q4 stale
FJ Capital Management LLC new22,756$259K0.1%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.

HoldersTotal shares

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.

Learn how to read institutional ownership