Comparable stake leader
BlackRock, Inc.
SEC ownership of AdvanSix Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001673985.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
07 May 2026
- Public ticker
- ASIX on NYSE
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 07 May 2026
- Issuer CIK
- 0001673985
- Issuer location
- Parsippany, NJ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AdvanSix Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
07 May 2026
13F
13D/G
3/4/5
Lead comparable stake: 7.1%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 7.1%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
7.1%
CastleKnight Master Fund LP
6.2%
DIMENSIONAL FUND ADVISORS LP
4.8%
VICTORY CAPITAL MANAGEMENT INC
0.51%
Erin N. Kane
2.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
7.1%
from 13D/G
|
$55,727,999
2,283,935 shares
|
— | 31 Mar 2026 |
| CastleKnight Master Fund LP |
13D/G
|
6.2%
|
$39,826,530
1,666,382 shares
|
$0 | 07 May 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
4.8%
from 13D/G
|
$31,988,371
1,311,006 shares
|
— | 31 Mar 2026 |
| VICTORY CAPITAL MANAGEMENT INC |
13F
13D/G
Company
|
0.51%
from 13D/G
|
$3,434,422
140,755 shares
|
— | 31 Mar 2026 |
| Erin N. Kane |
3/4/5
Chief Executive Officer, Director
|
2.3%
|
$10,885,609
623,103 shares
|
— | 28 Feb 2026 |
| Todd D. Karran |
3/4/5
Director
|
0.32%
|
$2,054,306
85,739 shares
|
— | 18 Jun 2025 |
| Sharon Spurlin |
3/4/5
Director
|
0.28%
|
$1,790,914
74,746 shares
|
— | 18 Jun 2025 |
| Christopher Gramm |
3/4/5
VP and Interim CFO
|
0.27%
|
$1,275,746
73,025 shares
|
— | 28 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$49,357.
Buys
$0
Insiders: 0
Sells
$49,357
Insiders: 1
Net
-$49,357
Shares: -2,290
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 2,290
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 577 | $0 | $11,540 | -$11,540 |
| 9-12 | 0 | 1,713 | $0 | $37,817 | -$37,817 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 22 reporting-owner rows connected to AdvanSix Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
22
Largest Forms 3/4/5 holder
Erin N. Kane
Net 12M change
-$49,357
Latest report
27 Apr 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Erin N. Kane | Chief Executive Officer, Director | $10,885,609 | Mixed | 28 Feb 2026 | ||
| Michael Preston | SVP & Chief Financial Officer | $4,525,618 | Mixed | 28 Feb 2024 | ||
| Michael L. Marberry | Director | $3,847,860 | Mixed | 31 Mar 2023 | ||
| Todd D. Karran | Director | $2,054,306 | Mixed | 18 Jun 2025 | ||
| Sharon Spurlin | Director | $1,790,914 | Mixed | 18 Jun 2025 | ||
| Christopher Gramm | VP and Interim CFO | $1,275,746 | Mixed | 28 Feb 2026 | ||
| Siddharth Manjeshwar | SVP & Chief Financial Officer | $1,254,565 | Mixed | 28 Feb 2025 | ||
| Kelly Slieter | SVP, Chief HR Officer | $1,136,056 | Mixed | 28 Feb 2026 | ||
| Paul E. Huck | Director | $1,054,290 | Mixed | 10 Jun 2021 | ||
| Patrick C. Day | Svp, Cfo | $928,127 | Median | 27 Apr 2026 | ||
| Darrell K. Hughes | Director | $904,568 | Mixed | 11 Jun 2024 | ||
| Achilles B. Kintiroglou | SVP, General Counsel | $879,841 | -$49,357 | -5.3% | Mixed | 28 Feb 2026 |
| Daniel F. Sansone | Director | $869,460 | Mixed | 18 Jun 2025 | ||
| Willem L. Blindenbach | SVP, Integrated Supply Chain | $809,940 | Mixed | 28 Feb 2022 | ||
| Patrick Williams | Director | $632,609 | Mixed | 31 Mar 2026 | ||
| Gena C. Lovett | Director | $363,281 | Mixed | 18 Jun 2025 | ||
| Rachael E. Ryan | VP, Controller | $285,674 | Mixed | 24 Mar 2026 | ||
| Donald P. Newman | Director | $244,436 | Mixed | 15 Dec 2025 | ||
| Farha Aslam | Director | $241,464 | Mixed | 11 Jun 2024 | ||
| Daryl Roberts | Director | $0 | Mixed | 02 Sep 2025 |
Recent insider transactions for AdvanSix Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Patrick C. Day | ASIX | Common Stock, par value $0.01 | Award | 38,038 | 38,038 | 27 Apr 2026 | Direct | |||
| Patrick Williams | ASIX | Common Stock, par value $0.01 | Award | 1.49% | 537 | 36,567 | 31 Mar 2026 | Direct | ||
| Rachael E. Ryan | ASIX | Common Stock, par value $0.01 | Tax liability | -11.2% | -2,074 | 16,513 | 24 Mar 2026 | Direct | ||
| Christopher Gramm | ASIX | Common Stock, par value $0.01 | Tax liability | -3.47% | -2,624 | 73,025 | 28 Feb 2026 | Direct | ||
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Tax liability | -13.7% | -8,008 | 50,363 | 28 Feb 2026 | Direct | ||
| Kelly Slieter | ASIX | Common Stock, par value $0.01 | Tax liability | -7.7% | -5,424 | 65,029 | 28 Feb 2026 | Direct | ||
| Erin N. Kane | ASIX | Common Stock, par value $0.01 | Tax liability | -5.12% | -33,642 | 623,103 | 28 Feb 2026 | Direct | ||
| Rachael E. Ryan | ASIX | Common Stock, par value $0.01 | Award | 43.4% | 5,621 | 18,587 | 26 Feb 2026 | Direct | ||
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Award | 92.9% | 28,106 | 58,371 | 26 Feb 2026 | Direct | ||
| Kelly Slieter | ASIX | Common Stock, par value $0.01 | Award | 46.9% | 22,485 | 70,453 | 26 Feb 2026 | Direct | ||
| Christopher Gramm | ASIX | Common Stock, par value $0.01 | Award | 38.6% | 21,079 | 75,649 | 26 Feb 2026 | Direct | ||
| Erin N. Kane | ASIX | Common Stock, par value $0.01 | Award | 20.4% | 111,298 | 656,745 | 26 Feb 2026 | Direct | ||
| Donald P. Newman | ASIX | Common Stock, par value $0.01 | Award | 12.7% | 1,721 | 15,306 | 15 Dec 2025 | Direct | ||
| Patrick Williams | ASIX | Common Stock, par value $0.01 | Award | 2.34% | 821 | 35,923 | 15 Dec 2025 | Direct | ||
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Sale | -1.87% | $11,540 | $20.00 | -577 | 30,265 | 03 Oct 2025 | Direct |
| Patrick Williams | ASIX | Common Stock, par value $0.01 | Award | 1.97% | 677 | 34,965 | 30 Sep 2025 | Direct | ||
| Donald P. Newman | ASIX | Common Stock, par value $0.01 | Award | 11.7% | 1,418 | 13,497 | 30 Sep 2025 | Direct | ||
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Sale | -1.82% | $12,105 | $21.20 | -571 | 30,842 | 02 Sep 2025 | Direct |
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Sale | -1.79% | $11,523 | $20.18 | -571 | 31,413 | 01 Aug 2025 | Direct |
| Achilles B. Kintiroglou | ASIX | Common Stock, par value $0.01 | Sale | -1.75% | $14,189 | $24.85 | -571 | 31,984 | 02 Jul 2025 | Direct |
| Patrick Williams | ASIX | Common Stock, par value $0.01 | Award | 1.64% | 552 | 34,193 | 30 Jun 2025 | Direct | ||
| Donald P. Newman | ASIX | Common Stock, par value $0.01 | Award | 8.84% | 977 | 12,026 | 30 Jun 2025 | Direct | ||
| Patrick Williams | ASIX | Common Stock, par value $0.01 | Award | 17.5% | 5,020 | 33,641 | 18 Jun 2025 | Direct | ||
| Sharon Spurlin | ASIX | Common Stock, par value $0.01 | Award | 7.2% | 5,020 | 74,746 | 18 Jun 2025 | Direct | ||
| Daniel F. Sansone | ASIX | Common Stock, par value $0.01 | Award | 16% | 5,020 | 36,288 | 18 Jun 2025 | Direct | ||
| Donald P. Newman | ASIX | Common Stock, par value $0.01 | Award | 83.3% | 5,020 | 11,049 | 18 Jun 2025 | Direct | ||
| Gena C. Lovett | ASIX | Common Stock, par value $0.01 | Award | 49.5% | 5,020 | 15,162 | 18 Jun 2025 | Direct | ||
| Todd D. Karran | ASIX | Common Stock, par value $0.01 | Award | 6.22% | 5,020 | 85,739 | 18 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.