Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership2,764,616 shares
Latest Disclosed Value $ 299,166,943
Dimensional Fund Advisors Lp reports 7.31% increase in ownership of OC / Owens Corning

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 2,764,616 shares of Owens Corning (US:OC) valued at $299,186,744 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,576,405 shares of Owens Corning. This represents a change in shares of 7.31% during the quarter. The current value of the position is $332,196,259 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 2,764,616 188,211 7.31 299,167 3.76 0.0134
2026-02-12 2025-12-31 13F OWENS CORNING COM 690742101 2,576,405 645,773 33.45 288,332 5.58 0.0605
2025-11-12 2025-09-30 13F OWENS CORNING COM 690742101 1,930,632 110,452 6.07 273,101 9.10 0.0586
2025-08-12 2025-06-30 13F OWENS CORNING COM 690742101 1,820,180 232,755 14.66 250,321 10.42 0.0580
2025-05-13 2025-03-31 13F OWENS CORNING COM 690742101 1,587,425 -129,467 -7.54 226,701 -22.47 0.0563
2025-02-13 2024-12-31 13F OWENS CORNING COM 690742101 1,716,892 -175,486 -9.27 292,417 -12.45 0.0702
2024-11-07 2024-09-30 13F OWENS CORNING COM 690742101 1,892,378 -105,755 -5.29 334,020 -3.77 0.0810
2024-08-09 2024-06-30 13F OWENS CORNING COM 690742101 1,998,133 -31,619 -1.56 347,107 2.52 0.0907
2024-05-10 2024-03-31 13F OWENS CORNING COM 690742101 2,029,752 -275,503 -11.95 338,563 -0.92 0.0917
2024-02-07 2023-12-31 13F OWENS CORNING COM 690742101 2,305,255 -154,295 -6.27 341,713 1.84 0.0998
2023-11-09 2023-09-30 13F OWENS CORNING COM 690742101 2,459,550 49,723 2.06 335,536 6.69 0.1100
2023-08-09 2023-06-30 13F OWENS CORNING COM 690742101 2,409,827 2,867 0.12 314,488 36.39 0.1002
2023-05-12 2023-03-31 13F OWENS CORNING COM 690742101 2,406,960 37,793 1.60 230,575 114,046.04 0.0777
2023-02-09 2022-12-31 13F OWENS CORNING COM 690742101 2,369,167 76,454 3.33 202 -99.89 0.0597
2022-11-10 2022-09-30 13F OWENS CORNING COM 690742101 2,292,713 21,837 0.96 180,231 6.80 0.0692
2022-08-12 2022-06-30 13F OWENS CORNING COM 690742101 2,270,876 28,125 1.25 168,748 -17.77 0.0605
2022-05-13 2022-03-31 13F OWENS CORNING COM 690742101 2,242,751 84,048 3.89 205,226 5.05 0.0632
2022-02-09 2021-12-31 13F OWENS CORNING COM 690742101 2,158,703 13,107 0.61 195,359 6.48 0.0591
2021-11-12 2021-09-30 13F OWENS CORNING COM 690742101 2,145,596 35,069 1.66 183,463 -11.21 0.0591
2021-08-12 2021-06-30 13F OWENS CORNING COM 690742101 2,110,527 -28,210 -1.32 206,616 4.90 0.0654
2021-05-14 2021-03-31 13F OWENS CORNING COM 690742101 2,138,737 -262,601 -10.94 196,957 8.26 0.0651
2021-03-08 2020-12-31 13F/A-2 OWENS CORNING COM 690742101 2,401,338 -455,543 -15.95 181,933 -7.45 0.0657
2021-02-11 2020-12-31 13F OWENS CORNING COM 690742101 2,401,338 -455,543 181,933 65,704.5293
2020-11-12 2020-09-30 13F OWENS CORNING COM 690742101 2,856,881 -1,197,819 -29.54 196,569 -13.05 0.0834
2020-08-13 2020-06-30 13F OWENS CORNING COM 690742101 4,054,700 319,367 8.55 226,082 55.94 0.0994
2020-05-14 2020-03-31 13F OWENS CORNING COM 690742101 3,735,333 300,061 8.73 144,982 -35.19 0.0755
2020-02-14 2019-12-31 13F OWENS CORNING COM 690742101 3,435,272 14,244 0.42 223,699 3.47 0.0815
2019-11-12 2019-09-30 13F OWENS CORNING COM 690742101 3,421,028 166,556 5.12 216,200 14.15 0.0840
2019-08-13 2019-06-30 13F OWENS CORNING COM 690742101 3,254,472 26,720 0.83 189,394 24.53 0.0735
2019-08-12 2019-03-31 13F/A-2 OWENS CORNING COM 690742101 3,227,752 63,572 2.01 152,086 9.29 0.0606
2019-05-10 2019-03-31 13F OWENS CORNING COM 690742101 3,227,752 63,572 152,086
2019-02-26 2018-12-31 13F/A-1 OWENS CORNING COM 690742101 3,164,180 92,537 3.01 139,161 -16.52 0.0630
2019-02-13 2018-12-31 13F OWENS CORNING COM 690742101 3,164,180 92,537 139,161
2018-11-13 2018-09-30 13F OWENS CORNING COM 690742101 3,071,643 80,675 2.70 166,706 -12.04 0.0635
2018-08-10 2018-06-30 13F OWENS CORNING COM 690742101 2,990,968 -247,949 -7.66 189,533 -27.22 0.0756
2018-05-11 2018-03-31 13F OWENS CORNING COM 690742101 3,238,917 -263,613 -7.53 260,409 -19.14 0.1085
2018-02-12 2017-12-31 13F OWENS CORNING COM 690742101 3,502,530 -163,748 -4.47 322,038 13.56 0.1335
2017-11-13 2017-09-30 13F OWENS CORNING COM 690742101 3,666,278 93 0.00 283,581 15.59 0.1239
2017-08-11 2017-06-30 13F OWENS CORNING COM 690742101 3,666,185 27,809 0.76 245,337 9.88 0.1133
2017-05-12 2017-03-31 13F OWENS CORNING COM 690742101 3,638,376 280,680 8.36 223,280 28.97 0.1067
2017-02-09 2016-12-31 13F OWENS CORNING COM 690742101 3,357,696 424,127 14.46 173,131 10.54 0.0865
2016-11-10 2016-09-30 13F OWENS CORNING COM 690742101 2,933,569 -216,026 -6.86 156,619 -3.47 0.0847
2016-08-09 2016-06-30 13F OWENS CORNING COM 690742101 3,149,595 -117,280 -3.59 162,249 5.04 0.0934
2016-05-13 2016-03-31 13F OWENS CORNING COM 690742101 3,266,875 -86,776 -2.59 154,459 -2.07 0.0925
2016-02-10 2015-12-31 13F OWENS CORNING COM 690742101 3,353,651 87,542 2.68 157,726 15.24 0.0983
2015-11-13 2015-09-30 13F OWENS CORNING COM 690742101 3,266,109 64,705 2.02 136,866 3.63 0.0898
2015-08-14 2015-06-30 13F OWENS CORNING COM 690742101 3,201,404 196,670 6.55 132,066 1.28 0.0809
2015-05-14 2015-03-31 13F OWENS CORNING COM 690742101 3,004,734 149,168 5.22 130,402 27.52 0.0823
2015-02-06 2014-12-31 13F OWENS CORNING COM 690742101 2,855,566 84,778 3.06 102,259 16.23 0.0672
2014-11-13 2014-09-30 13F OWENS CORNING COM 690742101 2,770,788 6,696 0.24 87,982 -17.71 0.0623
2014-08-08 2014-06-30 13F OWENS CORNING COM 690742101 2,764,092 36,733 1.35 106,917 -9.19 0.0743
2014-05-14 2014-03-31 13F OWENS CORNING COM 690742101 2,727,359 61,341 2.30 117,733 8.45 0.0880
2014-02-12 2013-12-31 13F OWENS CORNING COM 690742101 2,666,018 -14,002 -0.52 108,558 6.65 0.0846
2013-11-13 2013-09-30 13F OWENS CORNING COM 690742101 2,680,020 6,081 0.23 101,786 -2.61 0.0881
2013-08-15 2013-06-30 13F OWENS CORNING COM 690742101 2,673,939 2,673,939 104,517 0.0984
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.