AdvanSix Inc.
MX ˙ BMV ˙ US00773T1016
SecurityMX:ASIX / AdvanSix Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership198,134 shares
Latest Disclosed Value $ 4,834,470
Millennium Management Llc reports 70.14% decrease in ownership of ASIX / AdvanSix Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 198,134 shares of AdvanSix Inc. (MX:ASIX) valued at $4,834,470 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 663,537 shares of AdvanSix Inc.. This represents a change in shares of -70.14% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ADVANSIX COM 00773T101 198,134 -465,403 -70.14 4,834 -57.89 0.0020
2026-02-17 2025-12-31 13F ADVANSIX COM 00773T101 663,537 663,537 11,479 0.0048
2025-11-14 2025-09-30 13F ADVANSIX COM 00773T101 0 -41,072 -100.00 0 -100.00
2025-08-14 2025-06-30 13F ADVANSIX COM 00773T101 41,072 -62,991 -60.53 975 -58.63 0.0005
2025-05-15 2025-03-31 13F ADVANSIX COM 00773T101 104,063 73,740 243.18 2,357 173.12 0.0013
2025-02-14 2024-12-31 13F ADVANSIX COM 00773T101 30,323 -24,283 -44.47 864 -47.95 0.0004
2024-11-14 2024-09-30 13F ADVANSIX COM 00773T101 54,606 -84,671 -60.79 1,659 -48.06 0.0008
2024-08-14 2024-06-30 13F ADVANSIX COM 00773T101 139,277 63,489 83.77 3,192 47.30 0.0015
2024-05-15 2024-03-31 13F ADVANSIX COM 00773T101 75,788 49,554 188.89 2,168 176.05 0.0009
2024-02-14 2023-12-31 13F ADVANSIX COM 00773T101 26,234 -184,864 -87.57 786 -88.03 0.0003
2023-11-14 2023-09-30 13F ADVANSIX COM 00773T101 211,098 126,802 150.42 6,561 122.52 0.0033
2023-08-14 2023-06-30 13F ADVANSIX COM 00773T101 84,296 21,337 33.89 2,949 22.37 0.0015
2023-05-15 2023-03-31 13F ADVANSIX COM 00773T101 62,959 -77,028 -55.03 2,409 -54.74 0.0014
2023-02-14 2022-12-31 13F ADVANSIX COM 00773T101 139,987 116,074 485.40 5,322 592.97 0.0029
2022-11-14 2022-09-30 13F ADVANSIX COM 00773T101 23,913 -101,105 -80.87 768 -81.63 0.0005
2022-08-15 2022-06-30 13F ADVANSIX COM 00773T101 125,018 125,018 4,181 0.0026
2022-05-16 2022-03-31 13F ADVANSIX COM 00773T101 0 -33,359 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ADVANSIX COM 00773T101 33,359 -14,583 -30.42 1,576 -17.31 0.0008
2021-11-15 2021-09-30 13F ADVANSIX COM 00773T101 47,942 -77,910 -61.91 1,906 -49.28 0.0011
2021-08-16 2021-06-30 13F ADVANSIX COM 00773T101 125,852 97,009 336.33 3,758 385.53 0.0023
2021-05-17 2021-03-31 13F ADVANSIX COM 00773T101 28,843 -44,237 -60.53 774 -47.02 0.0006
2021-02-16 2020-12-31 13F ADVANSIX COM 00773T101 73,080 8,976 14.00 1,461 76.88 0.0011
2020-11-16 2020-09-30 13F ADVANSIX COM 00773T101 64,104 -572,074 -89.92 826 -88.94 0.0010
2020-08-14 2020-06-30 13F ADVANSIX COM 00773T101 636,178 537,160 542.49 7,469 690.37 0.0102
2020-05-14 2020-03-31 13F ADVANSIX COM 00773T101 99,018 99,018 945 0.0021
2020-02-14 2019-12-31 13F ADVANSIX COM 00773T101 0 -38,228 -100.00 0 -100.00
2019-11-14 2019-09-30 13F ADVANSIX COM 00773T101 38,228 38,228 983 0.0016
2019-08-15 2019-06-30 13F/A-1 ADVANSIX COM 00773T101 0 -137,113 -100.00 0 -100.00
2019-05-14 2019-03-31 13F ADVANSIX COM 00773T101 137,113 37,712 37.94 3,917 61.93 0.0059
2019-02-15 2018-12-31 13F/A-1 ADVANSIX COM 00773T101 99,401 -31,519 -24.08 2,419 -45.58 0.0038
2019-02-14 2018-12-31 13F ADVANSIX COM 00773T101 99,401 2,419
2018-11-14 2018-09-30 13F ADVANSIX COM 00773T101 130,920 14,857 12.80 4,445 4.56 0.0054
2018-08-14 2018-06-30 13F ADVANSIX COM 00773T101 116,063 -51,905 -30.90 4,251 -27.23 0.0055
2018-05-15 2018-03-31 13F ADVANSIX COM 00773T101 167,968 55,265 49.04 5,842 23.22 0.0078
2018-02-14 2017-12-31 13F ADVANSIX COM 00773T101 112,703 -310,382 -73.36 4,741 -71.81 0.0065
2017-11-14 2017-09-30 13F ADVANSIX COM 00773T101 423,085 245,644 138.44 16,818 203.41 0.0256
2017-08-14 2017-06-30 13F ADVANSIX COM 00773T101 177,441 55,222 45.18 5,543 66.01 0.0099
2017-05-15 2017-03-31 13F ADVANSIX COM 00773T101 122,219 98,057 405.83 3,339 524.11 0.0061
2017-02-14 2016-12-31 13F ADVANSIX COM 00773T101 24,162 24,162 535 0.0011
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.