AdvanSix Inc.

ASIX

Exchange: NYSE
Industry: Plastic Materials, Synth Resins & Nonvulcan Elastomers
SEC CIK: 0001673985

SEC filings (opens in a new tab)

No open-market purchases or sales by AdvanSix Inc. insiders were filed in the last 90 days; 256 institutions reported holding it in 13F filings for Q2 2026, worth $498.3M in total; no superinvestor holds it.

13F holders, Q3 2026

Institutional positions in AdvanSix Inc. as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 4; 0 vs. Q2 2026
Shares held: 2.96K; +1.02K (+52.6%) vs. Q2 2026
Total value: $47.1K; +$8.55K (+22.2%) vs. Q2 2026
New holders: 1; 1 more added
Sold out: 1; 1 more reduced

252 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting ASIX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding ASIX and their total value by quarter
Quarter	Holders	Value
Q2 2026	256	$498.3M
Q1 2026	266	$572.4M
Q4 2025	278	$414.3M
Q3 2025	277	$473.9M
Q2 2025	280	$583.7M
Q1 2025	277	$541.0M
Q4 2024	282	$678.7M
Q3 2024	279	$708.9M
Q2 2024	260	$526.1M
Q1 2024	272	$657.5M
Q4 2023	281	$690.7M
Q3 2023	285	$711.4M
Q2 2023	291	$821.8M
Q1 2023	305	$893.4M
Q4 2022	316	$881.7M
Q3 2022	306	$742.9M
Q2 2022	324	$782.1M
Q1 2022	341	$1.21B
Q4 2021	350	$1.09B
Q3 2021	305	$927.5M
Q2 2021	288	$688.7M
Q1 2021	274	$620.6M

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding AdvanSix Inc.; share changes are against Q2 2026.

Institutions holding ASIX in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
XTX Topco Ltd	–	–	–	–	Not filed
STRS Ohio	–	–	–	–	Not filed
BNP Paribas Arbitrage, SA	–	–	–	–	Not filed
South Dakota Investment Council	–	–	–	–	Not filed
Cerity Partners LLC	–	–	–	–	Not filed
Mirae Asset Global ETFs Holdings Ltd.	–	–	–	–	Not filed
NorthCrest Asset Manangement, LLC	–	–	–	–	Not filed
Odyssean, LLC	–	–	–	–	Not filed
Algert Global LLC	–	–	–	–	Not filed
JustInvest LLC	–	–	–	–	Not filed
LPL Financial LLC	–	–	–	–	Not filed
CV Advisors LLC	–	–	–	–	Not filed
Brevan Howard Capital Management LP	–	–	–	–	Not filed
Boothbay Fund Management, LLC	–	–	–	–	Not filed
New York State Common Retirement Fund	–	–	–	–	Not filed
Police & Firemen's Retirement System of New Jersey	–	–	–	–	Not filed
Nisa Investment Advisors, LLC	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Parallel Advisors, LLC	–	–	–	–	Not filed
SG Americas Securities, LLC	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
Barclays PLC	–	–	–	–	Not filed
SRS Capital Advisors, Inc.	–	–	–	–	Not filed
Simplex Trading, LLC	–	–	–	–	Not filed
Legal & General Group Plc	–	–	–	–	Not filed
Royal Bank of Canada	–	–	–	–	Not filed
Ameritas Investment Partners, Inc.	–	–	–	–	Not filed
Hantz Financial Services, Inc.	–	–	–	–	Not filed
Allworth Financial LP	–	–	–	–	Not filed
Tower Research Capital LLC (TRC)	–	–	–	–	Not filed
The PNC Financial Services Group, Inc.	–	–	–	–	Not filed
State of Alaska, Department of Revenue	–	–	–	–	Not filed
Advisor Group Holdings, Inc.	–	–	–	–	Not filed
Quantbot Technologies LP	–	–	–	–	Not filed
Group One Trading, L.P.	–	–	–	–	Not filed
State of Wyoming	–	–	–	–	Not filed
IFP Advisors, Inc	–	–	–	–	Not filed
Optiver Holding B.V.	–	–	–	–	Not filed
Essential Partners LLC	–	–	–	–	Not filed
Farther Finance Advisors, LLC	–	–	–	–	Not filed
Sterling Capital Management LLC	–	–	–	–	Not filed
Signaturefd, LLC	–	–	–	–	Not filed
EverSource Wealth Advisors, LLC	–	–	–	–	Not filed
Tradewinds Capital Management, LLC	–	–	–	–	Not filed
Rothschild Investment LLC	–	–	–	–	Not filed
California State Teachers Retirement System	–	–	–	–	Not filed
Harbor Capital Advisors, Inc.	–	–	–	–	Not filed
Estabrook Capital Management	–	–	–	–	Not filed
Harbour Investments, Inc.	–	–	–	–	Not filed
Asset Planning,Inc	–	–	–	–	Not filed
Markowski Investments	–	–	–	–	Not filed
Steward Partners Investment Advisory, LLC	–	–	–	–	Not filed
Bessemer Group Inc	–	–	–	–	Not filed
Caldwell Sutter Capital, Inc.	–	–	–	–	Not filed
Hilltop National Bank	–	–	–	–	Not filed
Whittier Trust Co	–	–	–	–	Not filed
Parkside Financial Bank & Trust	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
McMillan Office, Inc.	–	–	–	–	Not filed
Clearstead Advisors, LLC	–	–	–	–	Not filed
Atlantic Union Bankshares Corp	–	–	–	–	Not filed
Basecamp Wealth Advisors LLC	–	–	–	–	Not filed
Birchbrook, Inc.	–	–	–	–	Not filed
Fifth Third Bancorp	–	–	–	–	Not filed
Smithfield Trust Co	–	–	–	–	Not filed
Key Financial Inc	–	–	–	–	Not filed
Triumph Capital Management	–	–	–	–	Not filed
Brown, Lisle/Cummings, Inc.	–	–	–	–	Not filed
Wealth Enhancement Trust Services, Inc.	–	–	–	–	Not filed
CoreCap Advisors, LLC	–	–	–	–	Not filed
SJS Investment Consulting Inc.	–	–	–	–	Not filed
Smartleaf Asset Management LLC	–	–	–	–	Not filed
DT Investment Partners, LLC	–	–	–	–	Not filed
St. Johns Investment Management Company, LLC	–	–	–	–	Not filed
Umb Bank N A	–	–	–	–	Not filed
Armstrong Advisory Group, Inc	–	–	–	–	Not filed
Creative Financial Designs Inc	–	–	–	–	Not filed
Webster Bank, N. A.	–	–	–	–	Not filed
Highline Wealth Partners LLC	–	–	–	–	Not filed
TD Waterhouse Canada Inc.	–	–	–	–	Not filed
TD Private Client Wealth LLC	–	–	–	–	Not filed
Grove Bank & Trust	–	–	–	–	Not filed
Thompson Investment Management, Inc.	–	–	–	–	Not filed
Silver Grove Financial Group, Inc.	–	–	–	–	Not filed
Huntington National Bank	–	–	–	–	Not filed
Rossby Financial, LCC	–	–	–	–	Not filed
Action Point Financial Planning, LLC	–	–	–	–	Not filed
National Bank of Canada	–	–	–	–	Not filed
Boyd Watterson Asset Management LLC	–	–	–	–	Not filed
Compagnie Lombard Odier SCmA	–	–	–	–	Not filed
True Wealth Design, LLC	–	–	–	–	Not filed
PFS Partners, LLC	–	–	–	–	Not filed
Colonial Trust Co	–	–	–	–	Not filed
Financial Consulate, Inc	–	–	–	–	Not filed
GAMMA Investing LLC	–	–	–	–	Not filed
Wall Street Access Asset Management, LLC	–	–	–	–	Not filed
Glen Eagle Advisors, LLC	–	–	–	–	Not filed
First Command Advisory Services, Inc.	–	–	–	–	Not filed
Nemes Rush Group LLC	–	–	–	–	Not filed
Assetmark, Inc	–	–	–	–	Not filed