Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ACIC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 1.8M | $20.6M | -2.1% | 3.782% | 0.00% |
| 2 | Empyrean Capital Partners, LP | 1.1M | $12.7M | +19.8% | 2.331% | 0.42% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 997K | $11.2M | — | 2.062% | 0.00% |
| 4 | PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 809K | $9.1M | +4.2% | 1.673% | 0.52% |
| 5 | DIMENSIONAL FUND ADVISORS LP | 750K | $8.4M | +19.6% | 1.552% | 0.00% |
| 6 | AMERICAN CENTURY COMPANIES INC | 719K | $8.1M | +11.0% | 1.488% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 616K | $6.9M | +1.8% | 1.274% | 0.00% |
| 8 | SEI INVESTMENTS CO | 601K | $6.8M | +118.6% | 1.244% | 0.01% |
| 9 | TWO SIGMA INVESTMENTS, LP | 565K | $6.4M | +187.7% | 1.168% | 0.01% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | 539K | $6.1M | +18.5% | 1.115% | 0.01% |
| 11 | STATE STREET CORP | 506K | $5.7M | +3.1% | 1.046% | 0.00% |
| 12 | DG Capital Management, LLC | 465K | $5.2M | -58.0% | 0.963% | 1.66% |
| 13 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 392K | $4.4M | — | 0.810% | 0.00% |
| 14 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 318K | $3.6M | +433.8% | 0.658% | 0.00% |
| 15 | Empowered Funds, LLC | 309K | $3.5M | +14.4% | 0.638% | 0.02% |
| 16 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 288K | $3.2M | +69.5% | 0.596% | 0.07% |
| 17 | VANGUARD PORTFOLIO MANAGEMENT LLC | 272K | $3.1M | — | 0.562% | 0.00% |
| 18 | TUDOR INVESTMENT CORP ET AL | 216K | $2.4M | +25.6% | 0.447% | 0.01% |
| 19 | AQR CAPITAL MANAGEMENT LLC | 216K | $2.4M | +67.6% | 0.446% | 0.00% |
| 20 | Militia Capital Management LLC | 201K | $2.3M | — | 0.415% | 0.52% |
| 21 | NORTHERN TRUST CORP | 193K | $2.2M | +4.0% | 0.400% | 0.00% |
| 22 | Crews Bank & Trust | 189K | $2.1M | 0.0% | 0.391% | 0.31% |
| 23 | MARSHALL WACE, LLP | 179K | $2.0M | +8.4% | 0.371% | 0.00% |
| 24 | GOLDMAN SACHS GROUP INC | 172K | $1.9M | +83.8% | 0.355% | 0.00% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 162K | $1.8M | — | 0.335% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ACIC — a direct measure of their conviction.
Filings activity in ACIC during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 146 | +5.8% | 35.61% | 0.34 pp | $180M | 0.9% |
| Q4 2025 | 138 | +10% | 35.95% | +3.55 pp | $182M | +11% |
| Q3 2025 | 125 | +2.5% | 32.40% | +1.85 pp | $164M | +6.1% |
| Q2 2025 | 122 | +3.4% | 30.55% | +4.60 pp | $154M | +18% |
| Q1 2025 | 118 | +10% | 25.95% | 4.09 pp | $131M | 14% |
| Q4 2024 | 107 | +1.9% | 30.04% | +7.83 pp | $152M | +35% |
| Q3 2024 | 105 | +0.0% | 22.21% | +2.14 pp | $112M | +11% |
| Q2 2024 | 105 | — | 20.07% | — | $101M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ACIC stock.
Based on Q1 2026 13F filings, institutional ownership of American Coastal Insurance Corporation stands at 35.6%, held across 146 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ACIC, with approximately 1,828,264 shares worth $0.02B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of ACIC, including TWO SIGMA INVESTMENTS, LP, RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for ACIC is 58 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
38 institutions opened new positions in ACIC during Q1 2026, while 30 fully exited. 35 added to existing positions and 71 trimmed.
ACIC institutional ownership fell by 0.34 percentage points quarter-over-quarter, with a net change of +8 holders.
The top 10 institutions account for 53.5% of all reported 13F value in ACIC, and the top 25 account for 79.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
American Coastal Insurance Corporation (ACIC) Institutional Ownership