Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionKBC Group NV
Latest Disclosed Ownership137,946 shares
Latest Disclosed Value $ 14,929
KBC Group NV reports 41.34% decrease in ownership of OC / Owens Corning

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 137,946 shares of Owens Corning (US:OC) valued at $14,928,516 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 235,157 shares of Owens Corning. This represents a change in shares of -41.34% during the quarter. The current value of the position is $16,575,591 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)
2026-05-07 2026-03-31 13F OWENS CORNING COM 690742101 137,946 -97,211 -41.34 15 -46.15 0.0193
2026-01-26 2025-12-31 13F OWENS CORNING COM 690742101 235,157 -29,130 -11.02 26 -29.73 0.0600
2026-01-20 2025-09-30 13F OWENS CORNING COM 690742101 264,287 -207,980 -44.04 37 -42.19 0.0897
2025-08-08 2025-06-30 13F OWENS CORNING COM 690742101 472,267 -162,516 -25.60 65 -28.89 0.1754
2025-04-25 2025-03-31 13F OWENS CORNING COM 690742101 634,783 272,367 75.15 91 47.54 0.2814
2025-01-22 2024-12-31 13F OWENS CORNING COM 690742101 362,416 178,710 97.28 62 90.63 0.1701
2024-11-06 2024-09-30 13F OWENS CORNING COM 690742101 183,706 -72,170 -28.21 32 -27.27 0.0980
2024-07-17 2024-06-30 13F OWENS CORNING COM 690742101 255,876 5,744 2.30 44 7.32 0.1343
2024-05-08 2024-03-31 13F OWENS CORNING COM 690742101 250,132 47,881 23.67 42 41.38 0.1325
2024-02-13 2023-12-31 13F OWENS CORNING COM 690742101 202,251 21,254 11.74 30 20.83 0.1063
2024-02-15 2023-09-30 13F/A-1 OWENS CORNING COM 690742101 180,997 7,500 4.32 25 9.09 0.1008
2023-11-22 2023-09-30 13F OWENS CORNING COM 690742101 173,324 0 23 0.0942
2024-02-15 2023-06-30 13F/A-1 OWENS CORNING COM 690742101 173,497 -4,086 -2.30 23 29.41 0.0931
2023-07-28 2023-06-30 13F OWENS CORNING COM 690742101 173,324 -4,086 23 0.0942
2024-02-14 2023-03-31 13F/A-1 OWENS CORNING COM 690742101 177,583 -23,371 -11.63 17 0.00 0.0722
2023-05-04 2023-03-31 13F OWENS CORNING COM 690742101 177,410 -111,499 17 0.0801
2024-02-14 2022-12-31 13F/A-1 OWENS CORNING COM 690742101 200,954 -88,146 -30.49 17 -22.73 0.0832
2023-02-13 2022-12-31 13F OWENS CORNING COM 690742101 288,909 -191 23 0.0001
2024-02-15 2022-09-30 13F/A-1 OWENS CORNING COM 690742101 289,100 11,346 4.08 23 10.00 0.1181
2022-11-08 2022-09-30 13F OWENS CORNING COM 690742101 288,909 11,155 22,711 0.1187
2024-02-14 2022-06-30 13F/A-1 OWENS CORNING COM 690742101 277,754 -58,261 -17.34 21 -33.33 0.1030
2022-07-26 2022-06-30 13F OWENS CORNING COM 690742101 276,096 -59,919 20,517 0.1033
2024-02-14 2022-03-31 13F/A-1 OWENS CORNING COM 690742101 336,015 7,939 2.42 31 3.45 0.1215
2022-05-06 2022-03-31 13F OWENS CORNING COM 690742101 336,015 7,939 30,746 0.1135
2024-02-14 2021-12-31 13F/A-1 OWENS CORNING COM 690742101 328,076 93,057 39.60 30 -99.86 0.0979
2022-02-03 2021-12-31 13F OWENS CORNING COM 690742101 328,076 93,057 29,691 0.0930
2021-11-10 2021-09-30 13F OWENS CORNING COM 690742101 235,019 -311,178 -56.97 20,094 -62.42 0.0737
2022-02-15 2021-06-30 13F/A-1 OWENS CORNING COM 690742101 546,197 29,568 5.72 53,473 12.39 0.1928
2021-08-11 2021-06-30 13F OWENS CORNING COM 690742101 546,197 29,568 53,473 0.1928
2022-02-14 2021-03-31 13F/A-1 OWENS CORNING COM 690742101 516,629 14,453 2.88 47,577 -87.49 0.1927
2021-04-26 2021-03-31 13F OWENS CORNING COM 690742101 516,629 14,453 47,577 0.1927
2022-02-14 2020-12-31 13F/A-1 OWENS CORNING COM 690742101 502,176 213,710 74.08 380,449 1,816.72 0.1790
2021-02-10 2020-12-31 13F OWENS CORNING COM 690742101 502,176 213,710 38,045 0.1751
2022-02-14 2020-09-30 13F/A-1 OWENS CORNING COM 690742101 288,466 174,490 153.09 19,849 212.34 0.1169
2020-10-28 2020-09-30 13F OWENS CORNING COM 690742101 288,466 174,490 19,849 0.1174
2022-02-14 2020-06-30 13F/A-1 OWENS CORNING COM 690742101 113,976 94,878 496.80 6,355 757.62 0.0420
2020-08-10 2020-06-30 13F OWENS CORNING COM 690742101 113,976 94,878 6,355 0.0425
2020-05-04 2020-03-31 13F OWENS CORNING COM 690742101 19,098 10,259 116.07 741 28.65 0.0062
2020-02-11 2019-12-31 13F OWENS CORNING COM 690742101 8,839 0 0.00 576 3.04 0.0036
2019-11-07 2019-09-30 13F OWENS CORNING COM 690742101 8,839 0 0.00 559 8.75 0.0041
2019-08-08 2019-06-30 13F/A-1 OWENS CORNING COM 690742101 8,839 -23,273 -72.47 514 -66.03 0.0040
2019-07-30 2019-06-30 13F OWENS CORNING COM 690742101 8,839 -23,273 514
2019-08-07 2019-03-31 13F/A-1 OWENS CORNING COM 690742101 32,112 -116,625 -78.41 1,513 -76.87 0.0125
2019-05-10 2019-03-31 13F OWENS CORNING COM 690742101 32,112 -116,625 1,513
2019-01-31 2018-12-31 13F OWENS CORNING COM 690742101 148,737 -183,221 -55.19 6,542 -63.69 0.0729
2018-11-14 2018-09-30 13F OWENS CORNING COM 690742101 331,958 -47,386 -12.49 18,015 -25.06 0.1363
2018-08-03 2018-06-30 13F OWENS CORNING COM 690742101 379,344 2,588 0.69 24,039 -20.64 0.2093
2018-08-03 2018-03-31 13F/A-1 OWENS CORNING COM 690742101 376,756 98,630 35.46 30,291 18.46 0.2802
2018-05-09 2018-03-31 13F OWENS CORNING COM 690742101 376,756 98,630 30,291
2018-08-03 2017-12-31 13F/A-1 OWENS CORNING COM 690742101 278,126 66,290 31.29 25,571 56.06 0.2187
2018-02-07 2017-12-31 13F OWENS CORNING COM 690742101 278,126 66,290 25,571
2017-11-13 2017-09-30 13F OWENS CORNING COM 690742101 211,836 18,142 9.37 16,385 26.41 0.1487
2017-08-04 2017-06-30 13F OWENS CORNING COM 690742101 193,694 -37,324 -16.16 12,962 -8.57 0.1253
2017-05-10 2017-03-31 13F OWENS CORNING COM 690742101 231,018 162,759 238.44 14,177 302.87 0.1280
2017-02-16 2016-12-31 13F OWENS CORNING COM 690742101 68,259 68,259 3,519 0.0349
2016-02-11 2015-12-31 13F OWENS CORNING COM 690742101 0 -15,929 -100.00 0 -100.00
2015-11-12 2015-09-30 13F OWENS CORNING COM 690742101 15,929 0 0.00 668 1.67 0.0134
2015-12-16 2015-06-30 13F/A-1 OWENS CORNING COM 690742101 15,929 -51,027 -76.21 657 -77.39 0.0084
2015-07-31 2015-06-30 13F OWENS CORNING COM 690742101 15,929 657
2015-12-16 2015-03-31 13F/A-1 OWENS CORNING COM 690742101 66,956 45,465 211.55 2,906 277.40 0.0369
2015-04-30 2015-03-31 13F OWENS CORNING COM 690742101 66,956 2,906
2015-12-15 2014-12-31 13F/A-1 OWENS CORNING COM 690742101 21,491 -44,008 -67.19 770 -62.98 0.0092
2015-02-12 2014-12-31 13F OWENS CORNING COM 690742101 21,491 770
2014-10-16 2014-09-30 13F OWENS CORNING COM 690742101 65,499 -200,965 -75.42 2,080 -79.82 0.0726
2014-08-01 2014-06-30 13F OWENS CORNING COM 690742101 266,464 131,377 97.25 10,307 76.73 0.1177
2014-04-30 2014-03-31 13F OWENS CORNING COM 690742101 135,087 24,533 22.19 5,832 29.54 0.0921
2014-01-21 2013-12-31 13F OWENS CORNING COM 690742101 110,554 37,536 51.41 4,502 62.35 0.0681
2013-11-06 2013-09-30 13F OWENS CORNING COM 690742101 73,018 31,458 75.69 2,773 70.75 0.0446
2013-07-29 2013-06-30 13F OWENS CORNING COM 690742101 41,560 41,560 1,624 0.0301
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.