Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionAmalgamated Bank
Latest Disclosed Ownership36,991 shares
Latest Disclosed Value $ 4,003
Amalgamated Bank reports 0.13% decrease in ownership of OC / Owens Corning

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 36,991 shares of Owens Corning (US:OC) valued at $4,003,166 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 37,041 shares of Owens Corning. This represents a change in shares of -0.13% during the quarter. The current value of the position is $4,444,839 USD.

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)
2026-05-08 2026-03-31 13F OWENS CORNING NEW COM COM 690742101 36,991 -50 -0.13 4 0.00 0.0306
2026-02-05 2025-12-31 13F OWENS CORNING NEW COM COM 690742101 37,041 -1,201 -3.14 4 -20.00 0.0299
2025-10-29 2025-09-30 13F OWENS CORNING NEW COM COM 690742101 38,242 -604 -1.55 5 0.00 0.0387
2025-08-04 2025-06-30 13F OWENS CORNING NEW COM COM 690742101 38,846 -837 -2.11 5 0.00 0.0412
2025-04-25 2025-03-31 13F OWENS CORNING NEW COM COM 690742101 39,683 -1,495 -3.63 6 -28.57 0.0485
2025-02-04 2024-12-31 13F OWENS CORNING NEW COM COM 690742101 41,178 -1,218 -2.87 7 0.00 0.0576
2024-10-30 2024-09-30 13F OWENS CORNING NEW COM COM 690742101 42,396 -9,333 -18.04 7 -12.50 0.0616
2024-08-12 2024-06-30 13F OWENS CORNING NEW COM COM 690742101 51,729 -8,942 -14.74 9 -20.00 0.0765
2024-04-23 2024-03-31 13F OWENS CORNING NEW COM COM 690742101 60,671 -6,969 -10.30 10 0.00 0.0865
2024-02-06 2023-12-31 13F OWENS CORNING NEW COM COM 690742101 67,640 -1,245 -1.81 10 11.11 0.0800
2023-11-08 2023-09-30 13F OWENS CORNING NEW COM COM 690742101 68,885 9,295 15.60 9 28.57 0.0800
2023-08-11 2023-06-30 13F OWENS CORNING NEW COM COM 690742101 59,590 -4,644 -7.23 8 16.67 0.0629
2023-05-02 2023-03-31 13F OWENS CORNING NEW COM COM 690742101 64,234 -18,555 -22.41 6 -14.29 0.0525
2023-02-10 2022-12-31 13F OWENS CORNING NEW COM COM 690742101 82,789 12,767 18.23 7 -99.87 0.0630
2022-11-09 2022-09-30 13F OWENS CORNING NEW COM COM 690742101 70,022 -2,315 -3.20 5,504 2.40 0.0531
2022-08-15 2022-06-30 13F OWENS CORNING NEW COM COM 690742101 72,337 2,827 4.07 5,375 -15.49 0.0501
2022-08-25 2022-03-31 13F/A-1 OWENS CORNING NEW COM COM 690742101 69,510 -2,676 -3.71 6,360 -2.65 0.0494
2022-06-30 2022-03-31 13F OWENS CORNING NEW COM COM 690742101 69,510 -2,676 6,360 0.0505
2022-02-15 2021-12-31 13F/A-1 OWENS CORNING NEW COM COM 690742101 72,186 -9,721 -11.87 6,533 -6.71 0.0482
2022-02-15 2021-12-31 13F OWENS CORNING NEW COM COM 690742101 72,186 -9,721 6,533 0.0482
2021-10-29 2021-09-30 13F OWENS CORNING COM 690742101 81,907 -8,585 -9.49 7,003 -20.95 0.0591
2021-08-16 2021-06-30 13F OWENS CORNING COM 690742101 90,492 77,171 579.32 8,859 622.00 0.0710
2021-05-13 2021-03-31 13F OWENS CORNING COM 690742101 13,321 -917 -6.44 1,227 13.72 0.0460
2021-02-12 2020-12-31 13F OWENS CORNING COM 690742101 14,238 46 0.32 1,079 10.44 0.0409
2020-10-30 2020-09-30 13F OWENS CORNING COM 690742101 14,192 -58 -0.41 977 22.89 0.0425
2020-08-10 2020-06-30 13F OWENS CORNING COM 690742101 14,250 -10,069 -41.40 795 -15.78 0.0368
2020-05-13 2020-03-31 13F OWENS CORNING COM 690742101 24,319 -575 -2.31 944 -41.76 0.0231
2020-02-13 2019-12-31 13F OWENS CORNING COM 690742101 24,894 2,715 12.24 1,621 15.62 0.0298
2019-11-13 2019-09-30 13F OWENS CORNING COM 690742101 22,179 640 2.97 1,402 11.80 0.0295
2019-08-14 2019-06-30 13F OWENS CORNING COM 690742101 21,539 715 3.43 1,254 27.83 0.0293
2019-05-15 2019-03-31 13F OWENS CORNING COM 690742101 20,824 421 2.06 981 9.36 0.0238
2019-02-15 2018-12-31 13F OWENS CORNING COM 690742101 20,403 -341 -1.64 897 -20.34 0.0254
2018-11-14 2018-09-30 13F OWENS CORNING COM 690742101 20,744 -67 -0.32 1,126 -14.63 0.0278
2018-07-18 2018-06-30 13F OWENS CORNING COM 690742101 20,811 -275 -1.30 1,319 -22.18 0.0322
2018-05-22 2018-03-31 13F OWENS CORNING COM 690742101 21,086 -196 -0.92 1,695 -13.39 0.0450
2018-02-13 2017-12-31 13F OWENS CORNING COM 690742101 21,282 1,255 6.27 1,957 26.34 0.0530
2017-11-09 2017-09-30 13F OWENS CORNING COM 690742101 20,027 -142 -0.70 1,549 14.74 0.0482
2017-08-10 2017-06-30 13F OWENS CORNING COM 690742101 20,169 3,692 22.41 1,350 33.53 0.0442
2017-05-12 2017-03-31 13F OWENS CORNING COM 690742101 16,477 532 3.34 1,011 22.99 0.0503
2017-02-14 2016-12-31 13F OWENS CORNING COM 690742101 15,945 2,058 14.82 822 10.93 0.0372
2016-11-15 2016-09-30 13F/A-1 OWENS CORNING COM 690742101 13,887 21 0.15 741 -1.07 0.0430
2016-08-16 2016-06-30 13F OWENS CORNING COM 690742101 13,866 138 1.01 749 15.41 0.0433
2016-05-11 2016-03-31 13F OWENS CORNING COM 690742101 13,728 1,221 9.76 649 10.37 0.0632
2016-02-10 2015-12-31 13F OWENS CORNING COM 690742101 12,507 -860 -6.43 588 5.00 0.0725
2015-11-04 2015-09-30 13F OWENS CORNING COM 690742101 13,367 135 1.02 560 2.56 0.0587
2015-07-10 2015-06-30 13F OWENS CORNING COM 690742101 13,232 13,232 546 0.0536
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.