Owens Corning
US ˙ NYSE ˙ US6907421019

SecurityOC / Owens Corning
InstitutionCitigroup Inc
Latest Disclosed Ownership96,902 shares
Latest Disclosed Value $ 10,486,734
Citigroup Inc ownership in OC / Owens Corning

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 96,902 shares of Owens Corning (US:OC) valued at $10,486,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 98,911 shares of Owens Corning. This represents a change in shares of -2.03% during the quarter. The current value of the position is $11,643,744 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (OC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

OC / Owens Corning Historical Put/Call Ratio
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)
2026-05-11 2026-03-31 13F OWENS CORNING COM 690742101 96,902 -2,009 -2.03 10,487 -5.27 0.0023
2026-02-13 2025-12-31 13F OWENS CORNING COM 690742101 98,911 8,590 9.51 11,069 -13.36 0.0049
2025-11-10 2025-09-30 13F OWENS CORNING COM 690742101 90,321 -28,779 -24.16 12,777 -21.99 0.0057
2025-08-11 2025-06-30 13F OWENS CORNING COM 690742101 119,100 -1,706 -1.41 16,379 -5.07 0.0080
2025-05-12 2025-03-31 13F OWENS CORNING COM 690742101 120,806 43,528 56.33 17,254 31.08 0.0088
2025-02-12 2024-12-31 13F OWENS CORNING COM 690742101 77,278 -2,512 -3.15 13,162 -6.55 0.0078
2024-11-12 2024-09-30 13F OWENS CORNING COM 690742101 79,790 -1,588 -1.95 14,085 -0.37 0.0082
2024-08-12 2024-06-30 13F OWENS CORNING COM 690742101 81,378 -925 -1.12 14,137 2.97 0.0091
2024-05-10 2024-03-31 13F OWENS CORNING COM 690742101 82,303 1,286 1.59 13,728 14.31 0.0090
2024-02-09 2023-12-31 13F OWENS CORNING COM 690742101 81,017 11,154 15.97 12,009 26.01 0.0085
2023-12-06 2023-09-30 13F/A-1 OWENS CORNING COM 690742101 69,863 -26,556 -27.54 9,530 -24.26 0.0071
2023-11-09 2023-09-30 13F OWENS CORNING COM 690742101 69,863 -26,556 9,530 0.0028
2023-08-10 2023-06-30 13F OWENS CORNING COM 690742101 96,419 -115,593 -54.52 12,583 -38.05 0.0083
2023-05-11 2023-03-31 13F OWENS CORNING COM 690742101 212,012 52,600 33.00 20,311 49.37 0.0142
2023-02-09 2022-12-31 13F OWENS CORNING COM 690742101 159,412 -20,221 -11.26 13,598 -3.71 0.0108
2022-11-10 2022-09-30 13F OWENS CORNING COM 690742101 179,633 28,242 18.66 14,121 25.52 0.0101
2022-08-10 2022-06-30 13F OWENS CORNING COM 690742101 151,391 22,666 17.61 11,250 -4.48 0.0084
2022-05-12 2022-03-31 13F OWENS CORNING COM 690742101 128,725 3,395 2.71 11,778 3.83 0.0072
2022-02-10 2021-12-31 13F OWENS CORNING COM 690742101 125,330 -3,026 -2.36 11,343 3.36 0.0061
2021-11-10 2021-09-30 13F OWENS CORNING COM 690742101 128,356 21,484 20.10 10,974 4.89 0.0065
2021-08-10 2021-06-30 13F OWENS CORNING COM 690742101 106,872 -23,905 -18.28 10,462 -13.13 0.0063
2021-05-13 2021-03-31 13F OWENS CORNING COM 690742101 130,777 -181,967 -58.18 12,043 -49.17 0.0078
2021-02-11 2020-12-31 13F OWENS CORNING COM 690742101 312,744 201,488 181.10 23,695 209.50 0.0140
2020-11-12 2020-09-30 13F OWENS CORNING COM 690742101 111,256 -7,321 -6.17 7,656 15.79 0.0050
2020-08-12 2020-06-30 13F OWENS CORNING COM 690742101 118,577 45,339 61.91 6,612 132.73 0.0052
2020-05-12 2020-03-31 13F OWENS CORNING COM 690742101 73,238 -99,764 -57.67 2,841 -74.78 0.0026
2020-02-12 2019-12-31 13F OWENS CORNING COM 690742101 173,002 110,271 175.78 11,266 184.21 0.0082
2019-11-08 2019-09-30 13F OWENS CORNING COM 690742101 62,731 -96,248 -60.54 3,964 -57.16 0.0031
2019-08-12 2019-06-30 13F OWENS CORNING COM 690742101 158,979 -43,392 -21.44 9,253 -2.97 0.0075
2019-05-13 2019-03-31 13F OWENS CORNING COM 690742101 202,371 -309,023 -60.43 9,536 -57.60 0.0092
2019-02-12 2018-12-31 13F OWENS CORNING COM 690742101 511,394 190,726 59.48 22,490 29.24 0.0228
2018-11-13 2018-09-30 13F OWENS CORNING COM 690742101 320,668 -13,776 -4.12 17,402 -17.89 0.0155
2018-08-10 2018-06-30 13F OWENS CORNING COM 690742101 334,444 323,616 2,988.70 21,194 2,333.30 0.0195
2018-05-11 2018-03-31 13F OWENS CORNING COM 690742101 10,828 -37,071 -77.39 871 -80.23 0.0007
2018-02-12 2017-12-31 13F OWENS CORNING COM 690742101 47,899 14,795 44.69 4,405 72.00 0.0035
2017-11-13 2017-09-30 13F OWENS CORNING COM 690742101 33,104 -22,895 -40.88 2,561 -31.67 0.0021
2017-08-11 2017-06-30 13F OWENS CORNING COM 690742101 55,999 53,047 1,796.99 3,748 1,982.22 0.0034
2017-05-12 2017-03-31 13F OWENS CORNING COM 690742101 2,952 -2,934 -49.85 180 -40.79 0.0002
2017-02-10 2016-12-31 13F OWENS CORNING COM 690742101 5,886 -1,652 -21.92 304 -24.57 0.0003
2016-11-10 2016-09-30 13F OWENS CORNING COM 690742101 7,538 -6,378 -45.83 403 -43.79 0.0004
2016-08-12 2016-06-30 13F OWENS CORNING COM 690742101 13,916 6,810 95.83 717 114.03 0.0007
2016-05-13 2016-03-31 13F OWENS CORNING COM 690742101 7,106 1,255 21.45 335 21.82 0.0004
2016-02-12 2015-12-31 13F OWENS CORNING COM 690742101 5,851 -14,346 -71.03 275 -67.49 0.0003
2015-11-13 2015-09-30 13F OWENS CORNING COM 690742101 20,197 -299,288 -93.68 846 -93.58 0.0008
2015-08-13 2015-06-30 13F OWENS CORNING COM 690742101 319,485 -168,442 -34.52 13,179 -37.76 0.0117
2015-05-14 2015-03-31 13F OWENS CORNING COM 690742101 487,927 452,728 1,286.20 21,176 1,580.63 0.0205
2015-02-17 2014-12-31 13F OWENS CORNING COM 690742101 35,199 -121,677 -77.56 1,260 -74.70 0.0011
2014-11-14 2014-09-30 13F OWENS CORNING COM 690742101 156,876 79,008 101.46 4,981 65.32 0.0044
2014-08-14 2014-06-30 13F OWENS CORNING COM 690742101 77,868 -43,440 -35.81 3,013 -42.47 0.0029
2014-05-15 2014-03-31 13F OWENS CORNING COM 690742101 121,308 -20,329 -14.35 5,237 -9.19 0.0054
2014-02-14 2013-12-31 13F OWENS CORNING COM 690742101 141,637 8,428 6.33 5,767 13.97 0.0052
2013-11-14 2013-09-30 13F OWENS CORNING COM 690742101 133,209 97,247 270.42 5,060 259.89 0.0047
2013-08-14 2013-06-30 13F OWENS CORNING COM 690742101 35,962 35,962 1,406 0.0014
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-05-13 2021-03-31 13F OWENS CORNING COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F OWENS CORNING COM Call 26,600 -36.21 2,015 -29.77 n/a n/a n/a
2020-11-12 2020-09-30 13F OWENS CORNING COM Call 41,700 32.80 2,869 63.85 n/a n/a n/a
2020-08-12 2020-06-30 13F OWENS CORNING COM Call 31,400 16.30 1,751 67.08 n/a n/a n/a
2020-05-12 2020-03-31 13F OWENS CORNING COM Call 27,000 26.17 1,048 -24.82 n/a n/a n/a
2020-02-12 2019-12-31 13F OWENS CORNING COM Call 21,400 78.33 1,394 83.91 n/a n/a n/a
2019-11-08 2019-09-30 13F OWENS CORNING COM Call 12,000 -67.74 758 -64.99 n/a n/a n/a
2019-08-12 2019-06-30 13F OWENS CORNING COM Call 37,200 31.91 2,165 62.90 n/a n/a n/a
2019-05-13 2019-03-31 13F OWENS CORNING COM Call 28,200 -17.78 1,329 -11.93 n/a n/a n/a
2019-02-12 2018-12-31 13F OWENS CORNING COM Call 34,300 -58.27 1,509 -66.17 n/a n/a n/a
2018-11-13 2018-09-30 13F OWENS CORNING COM Call 82,200 104.99 4,461 75.56 n/a n/a n/a
2018-08-10 2018-06-30 13F OWENS CORNING COM Call 40,100 -21.98 2,541 -38.52 n/a n/a n/a
2018-05-11 2018-03-31 13F OWENS CORNING COM Call 51,400 771.19 4,133 662.55 n/a n/a n/a
2018-02-12 2017-12-31 13F OWENS CORNING COM Call 5,900 -77.31 542 -73.05 n/a n/a n/a
2017-11-13 2017-09-30 13F OWENS CORNING COM Call 26,000 -11.56 2,011 2.24 n/a n/a n/a
2017-08-11 2017-06-30 13F OWENS CORNING COM Call 29,400 48.48 1,967 61.89 n/a n/a n/a
2017-05-12 2017-03-31 13F OWENS CORNING COM Call 19,800 150.63 1,215 198.53 n/a n/a n/a
2017-02-10 2016-12-31 13F OWENS CORNING COM Call 7,900 -41.48 407 -43.55 n/a n/a n/a
2016-11-10 2016-09-30 13F OWENS CORNING COM Call 13,500 154.72 721 164.10 n/a n/a n/a
2016-08-12 2016-06-30 13F OWENS CORNING COM Call 5,300 0.00 273 8.76 n/a n/a n/a
2016-05-13 2016-03-31 13F OWENS CORNING COM Call 5,300 -92.03 251 -91.97 n/a n/a n/a
2016-02-12 2015-12-31 13F OWENS CORNING COM Call 66,500 -2.21 3,127 9.72 n/a n/a n/a
2015-11-13 2015-09-30 13F OWENS CORNING COM Call 68,000 -64.80 2,850 -64.24 n/a n/a n/a
2015-08-13 2015-06-30 13F OWENS CORNING COM Call 193,200 1,832.00 7,969 1,736.18 n/a n/a n/a
2015-05-14 2015-03-31 13F OWENS CORNING COM Call 10,000 -93.36 434 -91.95 n/a n/a n/a
2015-02-17 2014-12-31 13F OWENS CORNING COM Call 150,600 853.16 5,393 974.30 n/a n/a n/a
2014-11-14 2014-09-30 13F OWENS CORNING COM Call 15,800 -95.52 502 -96.32 n/a n/a n/a
2014-08-14 2014-06-30 13F OWENS CORNING COM Call 352,700 663.42 13,642 584.15 n/a n/a n/a
2014-05-15 2014-03-31 13F OWENS CORNING COM Call 46,200 -46.40 1,994 -43.19 n/a n/a n/a
2014-02-14 2013-12-31 13F OWENS CORNING COM Call 86,200 -74.11 3,510 -72.25 n/a n/a n/a
2013-11-14 2013-09-30 13F OWENS CORNING COM Call 333,000 -6.20 12,647 -8.84 n/a n/a n/a
2013-08-14 2013-06-30 13F OWENS CORNING COM Call 355,000 13,873 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2023-02-09 2022-12-31 13F OWENS CORNING COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-10 2022-09-30 13F OWENS CORNING COM Put 100,000 7,861 n/a n/a n/a
2021-05-13 2021-03-31 13F OWENS CORNING COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F OWENS CORNING COM Put 15,600 -63.03 1,182 -59.30 n/a n/a n/a
2020-11-12 2020-09-30 13F OWENS CORNING COM Put 42,200 72.95 2,904 113.37 n/a n/a n/a
2020-08-12 2020-06-30 13F OWENS CORNING COM Put 24,400 4.27 1,361 49.89 n/a n/a n/a
2020-05-12 2020-03-31 13F OWENS CORNING COM Put 23,400 -11.36 908 -47.18 n/a n/a n/a
2020-02-12 2019-12-31 13F OWENS CORNING COM Put 26,400 319.05 1,719 331.91 n/a n/a n/a
2019-11-08 2019-09-30 13F OWENS CORNING COM Put 6,300 -58.82 398 -55.28 n/a n/a n/a
2019-08-12 2019-06-30 13F OWENS CORNING COM Put 15,300 -69.94 890 -62.89 n/a n/a n/a
2019-05-13 2019-03-31 13F OWENS CORNING COM Put 50,900 -44.97 2,398 -41.05 n/a n/a n/a
2019-02-12 2018-12-31 13F OWENS CORNING COM Put 92,500 24.66 4,068 1.02 n/a n/a n/a
2018-11-13 2018-09-30 13F OWENS CORNING COM Put 74,200 -19.52 4,027 -31.08 n/a n/a n/a
2018-08-10 2018-06-30 13F OWENS CORNING COM Put 92,200 60.63 5,843 26.61 n/a n/a n/a
2018-05-11 2018-03-31 13F OWENS CORNING COM Put 57,400 537.78 4,615 458.04 n/a n/a n/a
2018-02-12 2017-12-31 13F OWENS CORNING COM Put 9,000 -73.76 827 -68.83 n/a n/a n/a
2017-11-13 2017-09-30 13F OWENS CORNING COM Put 34,300 9.58 2,653 26.63 n/a n/a n/a
2017-08-11 2017-06-30 13F OWENS CORNING COM Put 31,300 2,135.71 2,095 2,336.05 n/a n/a n/a
2017-05-12 2017-03-31 13F OWENS CORNING COM Put 1,400 -93.52 86 -92.28 n/a n/a n/a
2017-02-10 2016-12-31 13F OWENS CORNING COM Put 21,600 1,700.00 1,114 1,640.63 n/a n/a n/a
2016-11-10 2016-09-30 13F OWENS CORNING COM Put 1,200 -97.59 64 -97.51 n/a n/a n/a
2016-08-12 2016-06-30 13F OWENS CORNING COM Put 49,800 211.25 2,566 239.42 n/a n/a n/a
2016-05-13 2016-03-31 13F OWENS CORNING COM Put 16,000 -60.49 756 -60.31 n/a n/a n/a
2016-02-12 2015-12-31 13F OWENS CORNING COM Put 40,500 3.85 1,905 16.59 n/a n/a n/a
2015-11-13 2015-09-30 13F OWENS CORNING COM Put 39,000 -77.73 1,634 -77.38 n/a n/a n/a
2015-08-13 2015-06-30 13F OWENS CORNING COM Put 175,100 334.49 7,223 312.98 n/a n/a n/a
2015-05-14 2015-03-31 13F OWENS CORNING COM Put 40,300 -79.38 1,749 -75.00 n/a n/a n/a
2015-02-17 2014-12-31 13F OWENS CORNING COM Put 195,400 -12.18 6,997 -0.96 n/a n/a n/a
2014-11-14 2014-09-30 13F OWENS CORNING COM Put 222,500 -2.15 7,065 -19.68 n/a n/a n/a
2014-08-14 2014-06-30 13F OWENS CORNING COM Put 227,400 17.22 8,796 5.03 n/a n/a n/a
2014-05-15 2014-03-31 13F OWENS CORNING COM Put 194,000 -17.09 8,375 -12.11 n/a n/a n/a
2014-02-14 2013-12-31 13F OWENS CORNING COM Put 234,000 49.43 9,529 60.21 n/a n/a n/a
2013-11-14 2013-09-30 13F OWENS CORNING COM Put 156,600 31.27 5,948 27.58 n/a n/a n/a
2013-08-14 2013-06-30 13F OWENS CORNING COM Put 119,300 4,662 n/a n/a n/a
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.