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AdvanSix Inc. (ASIX) institutional ownership

Latest close $20.43 Jul 28, 2026
Market cap$552M 52-week range SectorBasic Materials
Funds holding · Q1 2026
210
reported ASIX position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
108 buyers · 102 sellers

AdvanSix Inc. (ASIX) price and institutional activity

Dates

Q1 2026

$0 bought by 108 investors
Castleknight Management LPAQR Capital Management LLC +106 more
$0 sold by 102 investors
BlackRockMillennium Management LLC +100 more
Bought Sold Totals per quarter; hover a bar for the names.

AdvanSix Inc. (ASIX) institutional activity · 210

Investor Type Est. change Change Δ Own Date
BlackRock · Reduced
Change −1.1M Date Q1 2026
BlackRock Reduced· Q1 2026 −1.1M Q1 2026
Castleknight Management LP · New
Change +632K Date Q1 2026
Castleknight Management LP New· Q1 2026 +632K Q1 2026
Millennium Management LLC · Reduced
Change −465K Date Q1 2026
Millennium Management LLC Reduced· Q1 2026 −465K Q1 2026
AQR Capital Management LLC · Added
Change +346K Date Q1 2026
AQR Capital Management LLC Added· Q1 2026 +346K Q1 2026
Arrowstreet Capital, Limited Partnership · Added
Change +320K Date Q1 2026
Arrowstreet Capital, Limited Partnership Added· Q1 2026 +320K Q1 2026
Acadian Asset Management LLC · New
Change +221K Date Q1 2026
Acadian Asset Management LLC New· Q1 2026 +221K Q1 2026
Lloyd Harbor Capital Management, LLC · Added
Change +215K Date Q1 2026
Lloyd Harbor Capital Management, LLC Added· Q1 2026 +215K Q1 2026
Two Sigma Investments, LP · Added
Change +207K Δ Own +51.1% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +207K +51.1% Q1 2026
Renaissance Technologies LLC Exited· Q1 2026 −204K −100.0% Q1 2026
Thompson Siegel & Walmsley LLC · Reduced
Change −198K Date Q1 2026
Thompson Siegel & Walmsley LLC Reduced· Q1 2026 −198K Q1 2026
Two Sigma Advisers, LP · Exited
Change −192K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −192K −100.0% Q1 2026
Citadel Advisors LLC Added· Q1 2026 +183K +465.0% Q1 2026
Hotchkis & Wiley Capital Management LLC · Exited
Change −146K Δ Own −100.0% Date Q1 2026
Hotchkis & Wiley Capital Management LLC Exited· Q1 2026 −146K −100.0% Q1 2026
Morgan Stanley · Added
Change +140K Date Q1 2026
Morgan Stanley Added· Q1 2026 +140K Q1 2026
Centerbook Partners LP · Added
Change +139K Date Q1 2026
Centerbook Partners LP Added· Q1 2026 +139K Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 210

Famous investor activity in AdvanSix Inc. (ASIX)

AdvanSix Inc. (ASIX) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Williams Patrick · Director Grant (A) $13K
Price $19.88 Qty 660 Owned 43K ΔOwn +1.5% Trade date Jun 30, 2026 Filed date Jul 1, 2026
Williams Patrick Director Grant (A) $19.88 660 $13K 43K +1.5% Jun 30, 2026 Jul 1, 2026
Bird Jeffrey J. · Director Grant (A) 6K
Owned 6K Trade date Jun 22, 2026 Filed date Jun 24, 2026
Bird Jeffrey J. Director Grant (A) 6K 6K Jun 22, 2026 Jun 24, 2026
Karran Todd D. · Director Grant (A) 6K
Owned 92K ΔOwn +7.2% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Karran Todd D. Director Grant (A) 6K 92K +7.2% Jun 22, 2026 Jun 24, 2026
Lovett Gena C. · Director Grant (A) 6K
Owned 21K ΔOwn +40.9% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Lovett Gena C. Director Grant (A) 6K 21K +40.9% Jun 22, 2026 Jun 24, 2026
Newman Donald P. · Director Grant (A) 6K
Owned 22K ΔOwn +40.6% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Newman Donald P. Director Grant (A) 6K 22K +40.6% Jun 22, 2026 Jun 24, 2026
O'Brien Dana C. · Director Grant (A) 6K
Owned 6K Trade date Jun 22, 2026 Filed date Jun 24, 2026
O'Brien Dana C. Director Grant (A) 6K 6K Jun 22, 2026 Jun 24, 2026
Roberts Daryl · Director Grant (A) 6K
Owned 6K Trade date Jun 22, 2026 Filed date Jun 24, 2026
Roberts Daryl Director Grant (A) 6K 6K Jun 22, 2026 Jun 24, 2026
Spurlin Sharon · Director Grant (A) 6K
Owned 81K ΔOwn +8.3% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Spurlin Sharon Director Grant (A) 6K 81K +8.3% Jun 22, 2026 Jun 24, 2026
Williams Patrick · Director Grant (A) 6K
Owned 43K ΔOwn +17.0% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Williams Patrick Director Grant (A) 6K 43K +17.0% Jun 22, 2026 Jun 24, 2026
Day Patrick C. · Officer 2 operations $900K
Price $23.66 Qty 38K Owned 38K Trade date Apr 27, 2026 Filed date Apr 29, 2026
Day Patrick C. Officer 2 operations $23.66 38K $900K 38K Apr 27, 2026 Apr 29, 2026
Williams Patrick · Director Grant (A) $13K
Price $24.40 Qty 537 Owned 37K Trade date Mar 31, 2026 Filed date Apr 1, 2026
Williams Patrick Director Grant (A) $24.40 537 $13K 37K Mar 31, 2026 Apr 1, 2026
Ryan Rachael E. · Officer Tax withholding or exercise payment (F) -$46K
Price $22.02 Qty -2K Owned 17K Trade date Mar 24, 2026 Filed date Mar 26, 2026
Ryan Rachael E. Officer Tax withholding or exercise payment (F) $22.02 -2K -$46K 17K Mar 24, 2026 Mar 26, 2026
Gramm Christopher · Officer Tax withholding or exercise payment (F) -$46K
Price $17.47 Qty -3K Owned 73K Trade date Feb 28, 2026 Filed date Mar 3, 2026
Gramm Christopher Officer Tax withholding or exercise payment (F) $17.47 -3K -$46K 73K Feb 28, 2026 Mar 3, 2026
Kintiroglou Achilles B. · Officer Tax withholding or exercise payment (F) -$140K
Price $17.47 Qty -8K Owned 50K Trade date Feb 28, 2026 Filed date Mar 3, 2026
Kintiroglou Achilles B. Officer Tax withholding or exercise payment (F) $17.47 -8K -$140K 50K Feb 28, 2026 Mar 3, 2026
Slieter Kelly · Officer Tax withholding or exercise payment (F) -$95K
Price $17.47 Qty -5K Owned 65K Trade date Feb 28, 2026 Filed date Mar 3, 2026
Slieter Kelly Officer Tax withholding or exercise payment (F) $17.47 -5K -$95K 65K Feb 28, 2026 Mar 3, 2026
15 of 127
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AdvanSix Inc. (ASIX) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 4.9M
% of shares outstanding 18.2% Filing date Jan 19, 2024
BlackRock Inc. 4.9M 18.2% Jan 19, 2024
Victory Capital Management Inc 2.6M
% of shares outstanding 9.6% Filing date Feb 7, 2024
Victory Capital Management Inc 2.6M 9.6% Feb 7, 2024
Vanguard Group Inc 2.1M
% of shares outstanding 7.9% Filing date Feb 13, 2024
Vanguard Group Inc 2.1M 7.9% Feb 13, 2024
Blackrock, Inc. 1.9M
% of shares outstanding 7.1% Filing date Apr 24, 2026
Blackrock, Inc. 1.9M 7.1% Apr 24, 2026
Castleknight Master Fund LP 1.7M
% of shares outstanding 6.2% Filing date May 14, 2026
Castleknight Master Fund LP 1.7M 6.2% May 14, 2026
Dimensional Fund Advisors LP 1.4M
% of shares outstanding 5.2% Filing date Jul 14, 2026
Dimensional Fund Advisors LP 1.4M 5.2% Jul 14, 2026
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AdvanSix Inc. (ASIX) ownership FAQ

Who owns ASIX?

210 reporting institutions disclosed ASIX position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.