AdvanSix Inc
Ownership
Ownership Structure
Who owns AdvanSix Inc (ASIX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 90.7% of the shares are freely tradable; institutional investors hold 93.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.46 | 2,283,935 | -32.7 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 5.21 | 1,407,349 | +7.3 | 06/30/2026 |
| American Century Companies Inc | 5.05 | 1,363,346 | +21.0 | 06/30/2026 |
| Aegis Financial Corporation | 4.48 | 1,209,629 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.16 | 1,123,457 | +0.0 | 03/31/2026 |
| AllianceBernstein L.P. | 3.23 | 870,976 | -7.7 | 03/31/2026 |
| Arrowstreet Capital Limited Partnership | 2.70 | 728,292 | +78.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 4.76 | 1,284,186 | +0.1 | 08/31/2026 |
| Aegis Value I | 4.35 | 1,174,992 | +0.0 | 06/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.02 | 815,299 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.