Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionTcw Group Inc
Latest Disclosed Ownership12,749 shares
Latest Disclosed Value $ 1,733,482
Tcw Group Inc reports 4.96% increase in ownership of GLW / Corning Incorporated

On May 14, 2026 - Tcw Group Inc filed a 13F-HR form disclosing ownership of 12,749 shares of Corning Incorporated (MX:GLW) valued at $1,733,482 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,147 shares of Corning Incorporated. This represents a change in shares of 4.96% during the quarter.

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)
2026-05-14 2026-03-31 13F CORNING COM 219350105 12,749 602 4.96 1,733 63.03 0.0069
2026-02-17 2025-12-31 13F CORNING COM 219350105 12,147 12,147 1,064 0.0076
2025-11-14 2025-09-30 13F CORNING COM 219350105 0 -11,705 -100.00 0 -100.00
2025-08-14 2025-06-30 13F CORNING COM 219350105 11,705 -53 -0.45 616 14.31 0.0048
2025-05-07 2025-03-31 13F CORNING COM 219350105 11,758 622 5.59 538 1.70 0.0048
2025-02-04 2024-12-31 13F CORNING COM 219350105 11,136 263 2.42 529 7.96 0.0044
2024-11-19 2024-09-30 13F/A-1 CORNING COM 219350105 10,873 -250 -2.25 491 13.43 0.0043
2024-11-08 2024-09-30 13F CORNING COM 219350105 10,873 -250 491 0.0022
2024-07-19 2024-06-30 13F CORNING COM 219350105 11,123 712 6.84 432 25.95 0.0039
2024-05-10 2024-03-31 13F CORNING COM 219350105 10,411 -1,823 -14.90 343 -8.29 0.0035
2024-02-09 2023-12-31 13F CORNING COM 219350105 12,234 -688,315 -98.25 375 -98.25 0.0042
2023-11-15 2023-09-30 13F CORNING COM 219350105 700,549 -180,436 -20.48 21,346 -30.85 0.2681
2023-08-14 2023-06-30 13F CORNING COM 219350105 880,985 73,157 9.06 30,870 8.31 0.3423
2023-05-15 2023-03-31 13F CORNING COM 219350105 807,828 -50,642 -5.90 28,500 3.94 0.3646
2023-02-14 2022-12-31 13F CORNING COM 219350105 858,470 -49,683 -5.47 27,420 4.04 0.3925
2022-10-27 2022-09-30 13F CORNING COM 219350105 908,153 -35,656 -3.78 26,354 -11.38 0.3855
2022-07-19 2022-06-30 13F CORNING COM 219350105 943,809 -170,296 -15.29 29,739 -27.68 0.3893
2022-04-19 2022-03-31 13F CORNING COM 219350105 1,114,105 -39,833 -3.45 41,122 -4.28 0.3924
2022-01-26 2021-12-31 13F CORNING COM 219350105 1,153,938 196,085 20.47 42,962 22.92 0.3533
2021-10-26 2021-09-30 13F CORNING COM 219350105 957,853 -19,561 -2.00 34,952 -12.57 0.0900
2021-07-23 2021-06-30 13F CORNING COM 219350105 977,414 -168,145 -14.68 39,976 -19.80 0.3464
2021-05-05 2021-03-31 13F CORNING COM 219350105 1,145,559 -97,313 -7.83 49,843 11.40 0.4775
2021-02-02 2020-12-31 13F CORNING COM 219350105 1,242,872 -70,487 -5.37 44,744 5.12 0.3895
2020-10-30 2020-09-30 13F CORNING COM 219350105 1,313,359 -408,447 -23.72 42,565 -4.55 0.4642
2020-08-05 2020-06-30 13F CORNING COM 219350105 1,721,806 -703,138 -29.00 44,595 -10.47 0.5201
2020-05-05 2020-03-31 13F CORNING COM 219350105 2,424,944 -46,454 -1.88 49,808 -30.77 0.6887
2020-02-10 2019-12-31 13F CORNING COM 219350105 2,471,398 -295,460 -10.68 71,942 -8.83 0.7967
2019-11-13 2019-09-30 13F CORNING COM 219350105 2,766,858 -281,664 -9.24 78,911 -22.10 0.8990
2019-08-07 2019-06-30 13F CORNING COM 219350105 3,048,522 -667,303 -17.96 101,302 -17.64 1.0772
2019-05-13 2019-03-31 13F CORNING COM 219350105 3,715,825 -771,605 -17.19 122,993 -9.27 1.1779
2019-02-11 2018-12-31 13F CORNING COM 219350105 4,487,430 -150,586 -3.25 135,565 -17.20 1.4025
2018-10-30 2018-09-30 13F CORNING COM 219350105 4,638,016 -569,035 -10.93 163,722 14.29 1.3426
2018-08-01 2018-06-30 13F CORNING COM 219350105 5,207,051 -1,005,414 -16.18 143,246 -17.30 1.1618
2018-05-10 2018-03-31 13F CORNING COM 219350105 6,212,465 328,291 5.58 173,203 -7.99 1.4087
2018-02-09 2017-12-31 13F CORNING COM 219350105 5,884,174 -197,434 -3.25 188,235 3.45 1.5159
2017-11-06 2017-09-30 13F CORNING COM 219350105 6,081,608 114,855 1.92 181,962 1.48 1.4463
2017-08-11 2017-06-30 13F CORNING COM 219350105 5,966,753 266,903 4.68 179,300 16.51 1.4889
2017-05-11 2017-03-31 13F CORNING COM 219350105 5,699,850 -281,229 -4.70 153,896 6.02 1.2837
2017-02-10 2016-12-31 13F CORNING COM 219350105 5,981,079 345,070 6.12 145,160 8.90 1.0927
2016-11-14 2016-09-30 13F CORNING COM 219350105 5,636,009 -17,646 -0.31 133,291 15.12 1.0125
2016-08-12 2016-06-30 13F/A-1 CORNING COM 219350105 5,653,655 90,031 1.62 115,786 -0.38 0.8749
2016-08-11 2016-06-30 13F CORNING COM 219350105 5,653,655 115,786
2016-05-16 2016-03-31 13F CORNING COM 219350105 5,563,624 744,590 15.45 116,224 31.93 0.8525
2016-02-16 2015-12-31 13F CORNING COM 219350105 4,819,034 -143,230 -2.89 88,092 3.69 0.6325
2015-11-13 2015-09-30 13F CORNING COM 219350105 4,962,264 455,661 10.11 84,954 -4.46 0.6096
2015-08-12 2015-06-30 13F CORNING COM 219350105 4,506,603 -412,715 -8.39 88,916 -20.31 0.5726
2015-05-13 2015-03-31 13F CORNING COM 219350105 4,919,318 -1,208,768 -19.73 111,571 -20.60 0.5356
2015-02-13 2014-12-31 13F CORNING COM 219350105 6,128,086 857,526 16.27 140,517 37.85 0.5878
2014-11-14 2014-09-30 13F CORNING COM 219350105 5,270,560 676,497 14.73 101,932 1.08 0.4099
2014-08-14 2014-06-30 13F CORNING COM 219350105 4,594,063 -341,501 -6.92 100,840 -1.87 0.4153
2014-05-13 2014-03-31 13F CORNING COM 219350105 4,935,564 -362,274 -6.84 102,758 8.85 0.4266
2014-02-18 2013-12-31 13F/A-1 CORNING COM 219350105 5,297,838 83,648 1.60 94,407 24.10 0.3979
2014-02-14 2013-12-31 13F CORNING COM 219350105 94,407 5,297,838
2013-11-14 2013-09-30 13F CORNING COM 219350105 5,214,190 948,150 22.23 76,075 25.32 0.3514
2013-08-14 2013-06-30 13F/A-1 CORNING COM 219350105 4,266,040 4,266,040 60,706 0.2993
2013-08-14 2013-06-30 13F CORNING COM 219350105 4,266,040 60,706
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.