Who owns AdvanSix Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ASIX from SEC Form 13F filings across 259 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 259 institutions disclosed 25.5M shares of AdvanSix Inc. worth $487.3M — about 94.4% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
259
13F holders
$487.3M
value, 2026 filers
94.4%
of shares outstanding (25.5M sh)
32
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ASIX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.4M | $48.5M | 0.0% | 9% | +6.9% |
| 2 | CastleKnight Management LP | 1.6M | $31.6M | 0.4% | 5.9% | +151.7% |
| 3 | DIMENSIONAL FUND ADVISORS LP | 1.4M | $28.0M | 0.0% | 5.2% | +7.3% |
| 4 | AMERICAN CENTURY COMPANIES INC | 1.4M | $27.1M | 0.0% | 5% | +21.0% |
| 5 | AEGIS FINANCIAL CORP | 1.2M | $24.0M | 3.8% | 4.5% | 0.0% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.2M | $22.9M | 0.0% | 4.3% | +2.5% |
| 7 | ALLIANCEBERNSTEIN L.P. | 863,897 | $21.1M | 0.0% | 3.2% | -0.8% |
| 8 | AQR CAPITAL MANAGEMENT LLC | 700,057 | $13.9M | 0.0% | 2.6% | +9.6% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 692,516 | $13.8M | 0.0% | 2.6% | +6.2% |
| 10 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 664,944 | $13.2M | 0.0% | 2.5% | -8.7% |
| 11 | FMR LLC | 658,319 | $13.1M | 0.0% | 2.4% | +8.2% |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 611,277 | $12.2M | 0.0% | 2.3% | -12.2% |
| 13 | Sixth Street Partners Management Company, L.P.NEW | 611,277 | $12.2M | 2.1% | 2.3% | new |
| 14 | STATE STREET CORP | 587,660 | $11.7M | 0.0% | 2.2% | +3.7% |
| 15 | Solas Capital Management, LLC | 571,324 | $11.4M | 6.1% | 2.1% | +10.5% |
| 16 | GOLDMAN SACHS GROUP INC | 553,525 | $11.0M | 0.0% | 2% | +12.9% |
| 17 | LSV ASSET MANAGEMENT | 548,779 | $10,910 | 0.0% | 2% | -0.3% |
| 18 | TWO SIGMA INVESTMENTS, LP | 548,516 | $10.9M | 0.0% | 2% | -10.5% |
| 19 | ACADIAN ASSET MANAGEMENT LLC | 520,886 | $10,348 | 0.0% | 1.9% | +135.3% |
| 20 | MORGAN STANLEY | 482,520 | $9.6M | 0.0% | 1.8% | +19.9% |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | 350,655 | $7.0M | 0.0% | 1.3% | +22.5% |
| 22 | Empowered Funds, LLC | 302,687 | $6.0M | 0.0% | 1.1% | +200.5% |
| 23 | NORTHERN TRUST CORP | 255,276 | $5.1M | 0.0% | 0.9% | +6.7% |
| 24 | TOWLE & CO | 249,091 | $5.0M | 1.7% | 0.9% | +1664.7% |
| 25 | UBS Group AG | 240,480 | $4.8M | 0.0% | 0.9% | -9.5% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.