Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership43,845 shares
Latest Disclosed Value $ 4,744,908
Mercer Global Advisors Inc /adv reports 48.70% increase in ownership of OC / Owens Corning

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 43,845 shares of Owens Corning (US:OC) valued at $4,744,906 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 29,485 shares of Owens Corning. This represents a change in shares of 48.70% during the quarter. The current value of the position is $5,226,324 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 43,845 14,360 48.70 4,745 43.80 0.0070
2026-02-17 2025-12-31 13F OWENS CORNING COM 690742101 29,485 2,702 10.09 3,300 -12.91 0.0050
2025-11-14 2025-09-30 13F OWENS CORNING COM 690742101 26,783 7,355 37.86 3,789 41.82 0.0063
2025-08-14 2025-06-30 13F OWENS CORNING COM 690742101 19,428 3,509 22.04 2,672 17.51 0.0054
2025-05-15 2025-03-31 13F OWENS CORNING COM 690742101 15,919 -671 -4.04 2,274 -19.54 0.0052
2025-02-14 2024-12-31 13F OWENS CORNING COM 690742101 16,590 -1,211 -6.80 2,826 -9.11 0.0069
2024-11-14 2024-09-30 13F OWENS CORNING COM 690742101 17,801 1,703 10.58 3,108 11.16 0.0073
2024-08-12 2024-06-30 13F OWENS CORNING COM 690742101 16,098 3,110 23.95 2,796 139,700.00 0.0076
2024-05-15 2024-03-31 13F OWENS CORNING COM 690742101 12,988 3,072 30.98 2 100.00 0.0062
2024-02-15 2023-12-31 13F OWENS CORNING COM 690742101 9,916 355 3.71 1 0.00 0.0044
2023-11-15 2023-09-30 13F/A-1 OWENS CORNING COM 690742101 9,561 1,278 15.43 1 0.00 0.0050
2023-11-14 2023-09-30 13F OWENS CORNING COM 690742101 9,561 1,278 1 0.0050
2023-08-14 2023-06-30 13F OWENS CORNING COM 690742101 8,283 1,074 14.90 1 0.0043
2023-05-16 2023-03-31 13F OWENS CORNING COM 690742101 7,209 722 11.13 1 0.0031
2023-02-09 2022-12-31 13F OWENS CORNING COM 690742101 6,487 -359 -5.24 1 -100.00 0.0028
2022-11-15 2022-09-30 13F OWENS CORNING COM 690742101 6,846 189 2.84 538 8.69 0.0032
2022-08-10 2022-06-30 13F OWENS CORNING COM 690742101 6,657 509 8.28 495 -11.92 0.0030
2022-05-10 2022-03-31 13F OWENS CORNING COM 690742101 6,148 779 14.51 562 15.64 0.0033
2022-02-04 2021-12-31 13F OWENS CORNING COM 690742101 5,369 44 0.83 486 6.81 0.0030
2021-11-10 2021-09-30 13F OWENS CORNING COM 690742101 5,325 1,500 39.22 455 21.33 0.0032
2021-08-10 2021-06-30 13F OWENS CORNING COM 690742101 3,825 90 2.41 375 9.01 0.0029
2021-08-10 2021-03-31 13F/A-1 OWENS CORNING COM 690742101 3,735 266 7.67 344 30.80 0.0031
2021-05-11 2021-03-31 13F OWENS CORNING COM 690742101 3,735 266 344 0.0033
2021-02-12 2020-12-31 13F OWENS CORNING COM 690742101 3,469 -1,284 -27.01 263 -19.57 0.0033
2020-12-10 2020-09-30 13F OWENS CORNING NEW COM COM 690742101 4,753 4,753 327 0.0049
2020-08-10 2020-06-30 13F OWENS CORNING COM 690742101 0 -24,156 -100.00 0 -100.00
2020-05-18 2020-03-31 13F OWENS CORNING COM 690742101 24,156 -9,630 -28.50 937 -57.41 0.0206
2020-02-13 2019-12-31 13F OWENS CORNING NEW COM COM 690742101 33,786 -14,898 -30.60 2,200 -28.48 0.0439
2019-11-12 2019-09-30 13F OWENS CORNING NEW COM COM 690742101 48,684 1,088 2.29 3,076 11.05 0.0723
2019-08-14 2019-06-30 13F OWENS CORNING NEW COM COM 690742101 47,596 1,113 2.39 2,770 26.48 0.0734
2019-04-23 2019-03-31 13F/A-1 OWENS CORNING NEW COM COM 690742101 46,483 46,483 2,190 0.0788
2019-04-12 2019-03-31 13F OWENS CORNING NEW COM COM 690742101 39,709 1,746 0.0930
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.