Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionMorgan Stanley
Latest Disclosed Ownership825,878 shares
Latest Disclosed Value $ 89,376,792
Morgan Stanley reports 12.51% increase in ownership of OC / Owens Corning

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 825,878 shares of Owens Corning (US:OC) valued at $89,376,517 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 734,026 shares of Owens Corning. This represents a change in shares of 12.51% during the quarter. The current value of the position is $99,402,676 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)
2026-05-15 2026-03-31 13F OWENS CORNING COM 690742101 825,878 91,852 12.51 89,377 8.80 0.0054
2026-05-27 2025-12-31 13F/A-1 OWENS CORNING COM 690742101 734,026 -147,308 -16.71 82,145 -34.11 0.0049
2026-02-13 2025-12-31 13F OWENS CORNING COM 690742101 734,026 -147,308 82,145 0.0049
2026-05-27 2025-09-30 13F/A-1 OWENS CORNING COM 690742101 881,334 102,279 13.13 124,674 16.37 0.0075
2025-11-14 2025-09-30 13F OWENS CORNING COM 690742101 881,334 102,279 124,674 0.0075
2025-08-15 2025-06-30 13F OWENS CORNING COM 690742101 779,055 -15,592 -1.96 107,136 -5.60 0.0070
2025-05-15 2025-03-31 13F OWENS CORNING COM 690742101 794,647 -69,852 -8.08 113,492 -22.92 0.0081
2025-05-15 2024-12-31 13F/A-1 OWENS CORNING COM 690742101 864,499 6,855 0.80 147,242 -2.74 0.0103
2025-02-14 2024-12-31 13F OWENS CORNING COM 690742101 864,499 6,855 147,242 0.0103
2025-05-14 2024-09-30 13F/A-2 OWENS CORNING COM 690742101 857,644 60,825 7.63 151,392 9.37 0.0110
2025-02-14 2024-09-30 13F/A-1 OWENS CORNING COM 690742101 857,644 60,825 151,392 0.0110
2024-11-14 2024-09-30 13F OWENS CORNING COM 690742101 857,644 60,825 151,392 0.0110
2025-05-14 2024-06-30 13F/A-2 OWENS CORNING COM 690742101 796,819 292 0.04 138,424 4.19 0.0107
2024-10-17 2024-06-30 13F/A-1 OWENS CORNING COM 690742101 796,819 292 138,424 0.0107
2024-08-14 2024-06-30 13F OWENS CORNING COM 690742101 796,819 292 138,424 0.0107
2024-10-17 2024-03-31 13F/A-2 OWENS CORNING COM 690742101 796,527 -28,025 -3.40 132,861 8.70 0.0107
2024-08-16 2024-03-31 13F/A-1 OWENS CORNING COM 690742101 796,527 -28,025 132,861 0.0012
2024-05-15 2024-03-31 13F OWENS CORNING COM 690742101 796,527 -28,025 132,861 0.0107
2024-08-16 2023-12-31 13F/A-1 OWENS CORNING COM 690742101 824,552 -204 -0.02 122,224 8.64 0.0108
2024-02-13 2023-12-31 13F OWENS CORNING COM 690742101 824,552 -204 122,224 0.0108
2023-11-15 2023-09-30 13F OWENS CORNING COM 690742101 824,756 52,902 6.85 112,505 11.69 0.0114
2023-08-14 2023-06-30 13F OWENS CORNING COM 690742101 771,854 35,765 4.86 100,727 42.84 0.0099
2023-05-15 2023-03-31 13F OWENS CORNING COM 690742101 736,089 -121,816 -14.20 70,518 -3.64 0.0076
2023-02-14 2022-12-31 13F OWENS CORNING COM 690742101 857,905 100,946 13.34 73,179 22.98 0.0083
2022-11-14 2022-09-30 13F OWENS CORNING COM 690742101 756,959 -460,855 -37.84 59,504 -34.25 0.0081
2022-10-27 2022-06-30 13F/A-1 OWENS CORNING COM 690742101 1,217,814 709,238 139.46 90,497 94.47 0.0117
2022-08-15 2022-06-30 13F OWENS CORNING COM 690742101 1,217,814 709,238 90,497 0.0024
2022-10-27 2022-03-31 13F/A-1 OWENS CORNING COM 690742101 508,576 -82,739 -13.99 46,535 -13.04 0.0063
2022-05-13 2022-03-31 13F OWENS CORNING COM 690742101 508,576 -82,739 46,535 0.0063
2022-02-14 2021-12-31 13F OWENS CORNING COM 690742101 591,315 27,380 4.86 53,514 10.99 0.0066
2021-11-15 2021-09-30 13F OWENS CORNING COM 690742101 563,935 165,118 41.40 48,216 23.49 0.0065
2021-08-23 2021-06-30 13F/A-1 OWENS CORNING COM 690742101 398,817 243,775 157.23 39,043 173.45 0.0051
2021-08-16 2021-06-30 13F OWENS CORNING COM 690742101 398,817 243,775 39,043 0.0011
2021-05-17 2021-03-31 13F OWENS CORNING COM 690742101 155,042 -17,305 -10.04 14,278 9.34 0.0021
2021-02-16 2020-12-31 13F OWENS CORNING COM 690742101 172,347 4,814 2.87 13,058 13.28 0.0020
2020-11-13 2020-09-30 13F OWENS CORNING COM 690742101 167,533 1,967 1.19 11,527 24.86 0.0022
2020-08-14 2020-06-30 13F OWENS CORNING COM 690742101 165,566 -8,398 -4.83 9,232 36.75 0.0020
2020-05-26 2020-03-31 13F/A-1 OWENS CORNING COM 690742101 173,964 -38,027 -17.94 6,751 -51.09 0.0018
2020-05-15 2020-03-31 13F OWENS CORNING COM 690742101 173,964 -38,027 6,751 518.6175
2020-02-14 2019-12-31 13F OWENS CORNING COM 690742101 211,991 70,737 50.08 13,804 54.63 0.0032
2019-11-14 2019-09-30 13F OWENS CORNING COM 690742101 141,254 21,270 17.73 8,927 27.84 0.0024
2019-08-14 2019-06-30 13F OWENS CORNING COM 690742101 119,984 -72,979 -37.82 6,983 -23.20 0.0019
2019-05-15 2019-03-31 13F OWENS CORNING COM 690742101 192,963 -352,989 -64.66 9,092 -62.13 0.0026
2019-02-14 2018-12-31 13F OWENS CORNING COM 690742101 545,952 -605,448 -52.58 24,011 -61.57 0.0072
2019-04-23 2018-09-30 13F/A-2 OWENS CORNING COM 690742101 1,151,400 901,083 359.98 62,487 293.92 0.0156
2018-11-20 2018-09-30 13F/A-1 OWENS CORNING COM 690742101 1,151,400 0 62,487 0.0156
2018-11-14 2018-09-30 13F OWENS CORNING COM 690742101 1,151,400 901,083 62,487
2019-04-23 2018-06-30 13F/A-1 OWENS CORNING COM 690742101 250,317 -202,244 -44.69 15,863 -56.40 0.0043
2018-08-14 2018-06-30 13F OWENS CORNING COM 690742101 250,317 -202,244 15,863
2019-04-23 2018-03-31 13F/A-1 OWENS CORNING COM 690742101 452,561 100,463 28.53 36,386 12.40 0.0101
2018-05-14 2018-03-31 13F OWENS CORNING COM 690742101 452,561 100,463 36,386
2019-04-23 2017-12-31 13F/A-1 OWENS CORNING COM 690742101 352,098 -3,227 -0.91 32,372 17.78 0.0089
2018-02-14 2017-12-31 13F OWENS CORNING COM 690742101 352,098 -3,227 32,372
2017-11-14 2017-09-30 13F OWENS CORNING COM 690742101 355,325 120,796 51.51 27,486 75.14 0.0082
2017-08-11 2017-06-30 13F OWENS CORNING COM 690742101 234,529 19,024 8.83 15,694 18.68 0.0047
2017-05-22 2017-03-31 13F/A-1 OWENS CORNING COM 690742101 215,505 65,232 43.41 13,224 70.65 0.0041
2017-05-12 2017-03-31 13F OWENS CORNING COM 690742101 215,505 13,224
2017-02-22 2016-12-31 13F/A-1 OWENS CORNING COM 690742101 150,273 -411,375 -73.24 7,749 -74.16 0.0025
2017-02-13 2016-12-31 13F OWENS CORNING COM 690742101 150,273 7,749
2016-11-10 2016-09-30 13F OWENS CORNING COM 690742101 561,648 -207,217 -26.95 29,987 -24.30 0.0102
2016-08-12 2016-06-30 13F OWENS CORNING COM 690742101 768,865 -217,320 -22.04 39,612 -15.04 0.0143
2016-05-12 2016-03-31 13F OWENS CORNING COM 690742101 986,185 383,194 63.55 46,627 64.42 0.0179
2016-02-09 2015-12-31 13F OWENS CORNING COM 690742101 602,991 -186,288 -23.60 28,358 -14.27 0.0103
2016-02-08 2015-09-30 13F/A-1 OWENS CORNING COM 690742101 789,279 298,991 60.98 33,079 63.56 0.0122
2015-11-09 2015-09-30 13F OWENS CORNING COM 690742101 789,279 33,079
2015-08-12 2015-06-30 13F OWENS CORNING COM 690742101 490,288 203,945 71.22 20,224 62.74 0.0070
2015-05-14 2015-03-31 13F OWENS CORNING COM 690742101 286,343 79,240 38.26 12,427 67.57 0.0046
2015-02-13 2014-12-31 13F OWENS CORNING COM 690742101 207,103 -160,800 -43.71 7,416 -36.51 0.0027
2014-12-16 2014-09-30 13F/A-1 OWENS CORNING COM 690742101 367,903 -143,862 -28.11 11,681 -47.13 0.0045
2014-11-14 2014-09-30 13F OWENS CORNING COM 690742101 367,903 11,681
2014-05-13 2014-03-31 13F OWENS CORNING COM 690742101 511,765 276,021 117.09 22,093 130.16 0.0093
2014-02-13 2013-12-31 13F OWENS CORNING COM 690742101 235,744 -267,829 -53.19 9,599 -49.81 0.0041
2013-11-13 2013-09-30 13F OWENS CORNING COM 690742101 503,573 105,209 26.41 19,127 22.86 0.0090
2013-08-08 2013-06-30 13F OWENS CORNING COM 690742101 398,364 398,364 15,568 0.0079
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.