Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionGabelli Funds Llc
Latest Disclosed Ownership229,876 shares
Latest Disclosed Value $ 31,256,240
Gabelli Funds Llc reports 20.10% decrease in ownership of GLW / Corning Incorporated

On May 14, 2026 - Gabelli Funds Llc filed a 13F-HR form disclosing ownership of 229,876 shares of Corning Incorporated (MX:GLW) valued at $31,256,240 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 287,699 shares of Corning Incorporated. This represents a change in shares of -20.10% 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 EQUITY 219350105 229,876 -57,823 -20.10 31,256 24.08 0.2111
2026-02-05 2025-12-31 13F CORNING EQUITY 219350105 287,699 -35,149 -10.89 25,191 -4.88 0.1705
2025-11-12 2025-09-30 13F CORNING EQUITY 219350105 322,848 -9,000 -2.71 26,483 51.76 0.1793
2025-08-13 2025-06-30 13F CORNING EQUITY 219350105 331,848 -25,949 -7.25 17,452 6.54 0.1239
2025-05-14 2025-03-31 13F CORNING EQUITY 219350105 357,797 -127,503 -26.27 16,380 -28.98 0.1248
2025-02-13 2024-12-31 13F CORNING EQUITY 219350105 485,300 -48,400 -9.07 23,061 -4.30 0.1732
2024-11-13 2024-09-30 13F CORNING EQUITY 219350105 533,700 -21,300 -3.84 24,097 11.76 0.1737
2024-08-13 2024-06-30 13F CORNING EQUITY 219350105 555,000 -3,500 -0.63 21,562 17.13 0.1638
2024-05-14 2024-03-31 13F CORNING EQUITY 219350105 558,500 0 0.00 18,408 8.24 0.1356
2024-02-13 2023-12-31 13F CORNING EQUITY 219350105 558,500 -500 -0.09 17,006 -0.15 0.1310
2023-11-08 2023-09-30 13F CORNING EQUITY 219350105 559,000 0 0.00 17,033 -13.04 0.1382
2023-08-10 2023-06-30 13F CORNING EQUITY 219350105 559,000 -2,950 -0.52 19,587 -1.20 0.1484
2023-05-12 2023-03-31 13F CORNING EQUITY 219350105 561,950 35,000 6.64 19,826 17.80 0.1503
2023-02-13 2022-12-31 13F CORNING EQUITY 219350105 526,950 -8,500 -1.59 16,831 8.31 0.1308
2022-11-14 2022-09-30 13F/A-1 CORNING COM 219350105 535,450 0 0.00 15,539 -7.90 0.1281
2022-11-10 2022-09-30 13F CORNING COM 219350105 535,450 0 15,539 0.1281
2022-08-12 2022-06-30 13F CORNING COM 219350105 535,450 4,500 0.85 16,872 -13.91 0.1295
2022-05-18 2022-03-31 13F/A-1 CORNING COM 219350105 530,950 -3,018 -0.57 19,597 -1.42 0.1287
2022-05-13 2022-03-31 13F CORNING COM 219350105 530,950 -3,018 19,597 0.1323
2022-02-11 2021-12-31 13F CORNING COM 219350105 533,968 2,000 0.38 19,880 2.41 0.1255
2021-11-12 2021-09-30 13F CORNING COM 219350105 531,968 10,518 2.02 19,412 -8.98 0.1286
2021-08-13 2021-06-30 13F CORNING COM 219350105 521,450 500 0.10 21,327 -5.91 0.1358
2021-05-14 2021-03-31 13F CORNING COM 219350105 520,950 -15,000 -2.80 22,667 17.48 0.1519
2021-02-05 2020-12-31 13F CORNING COM 219350105 535,950 -23,000 -4.11 19,294 6.50 0.1374
2020-11-06 2020-09-30 13F CORNING COM 219350105 558,950 -65,000 -10.42 18,116 12.10 0.1411
2020-08-13 2020-06-30 13F CORNING COM 219350105 623,950 -185,000 -22.87 16,160 -2.74 0.1317
2020-05-14 2020-03-31 13F CORNING COM 219350105 808,950 -6,050 -0.74 16,616 -29.96 0.1480
2020-02-14 2019-12-31 13F CORNING COM 219350105 815,000 -32,000 -3.78 23,725 -1.78 0.1535
2019-11-01 2019-09-30 13F CORNING COM 219350105 847,000 -26,000 -2.98 24,156 -16.73 0.1596
2019-08-02 2019-06-30 13F CORNING COM 219350105 873,000 -12,000 -1.36 29,010 -0.97 0.1862
2019-05-02 2019-03-31 13F CORNING COM 219350105 885,000 -45,000 -4.84 29,294 4.27 0.1842
2019-01-30 2018-12-31 13F CORNING COM 219350105 930,000 -7,000 -0.75 28,095 -15.06 0.1926
2018-11-02 2018-09-30 13F CORNING COM 219350105 937,000 -89,000 -8.67 33,076 17.19 0.1898
2018-08-10 2018-06-30 13F CORNING COM 219350105 1,026,000 -29,000 -2.75 28,225 -4.04 0.1672
2018-05-09 2018-03-31 13F CORNING COM 219350105 1,055,000 -2,500 -0.24 29,413 -13.05 0.1754
2018-02-02 2017-12-31 13F CORNING COM 219350105 1,057,500 -202,500 -16.07 33,829 -10.27 0.1949
2017-11-01 2017-09-30 13F CORNING COM 219350105 1,260,000 -42,000 -3.23 37,699 -3.64 0.2159
2017-08-03 2017-06-30 13F CORNING COM 219350105 1,302,000 -336,000 -20.51 39,125 -11.53 0.2325
2017-05-04 2017-03-31 13F CORNING COM 219350105 1,638,000 -208,000 -11.27 44,226 -1.29 0.2607
2017-02-10 2016-12-31 13F CORNING COM 219350105 1,846,000 -195,000 -9.55 44,802 -7.18 0.2651
2016-11-10 2016-09-30 13F CORNING COM 219350105 2,041,000 -18,000 -0.87 48,270 14.47 0.2864
2016-08-04 2016-06-30 13F CORNING COM 219350105 2,059,000 -15,000 -0.72 42,168 -2.67 0.2488
2016-05-05 2016-03-31 13F CORNING COM 219350105 2,074,000 -107,000 -4.91 43,326 8.67 0.2613
2016-02-05 2015-12-31 13F CORNING COM 219350105 2,181,000 -5,000 -0.23 39,869 6.53 0.2413
2015-10-23 2015-09-30 13F CORNING COM 219350105 2,186,000 0 0.00 37,424 -13.23 0.2224
2015-08-05 2015-06-30 13F CORNING COM 219350105 2,186,000 -12,100 -0.55 43,130 -13.49 0.2258
2015-05-01 2015-03-31 13F CORNING COM 219350105 2,198,100 -286,000 -11.51 49,853 -12.48 0.2530
2015-02-05 2014-12-31 13F CORNING COM 219350105 2,484,100 -174,000 -6.55 56,960 10.80 0.2770
2014-10-30 2014-09-30 13F CORNING COM 219350105 2,658,100 -126,000 -4.53 51,408 -15.88 0.2609
2014-08-06 2014-06-30 13F CORNING COM 219350105 2,784,100 -224,061 -7.45 61,111 -2.43 0.3021
2014-05-16 2014-03-31 13F/A-1 CORNING COM 219350105 3,008,161 -50,000 -1.63 62,630 14.93 0.3252
2014-05-02 2014-03-31 13F CORNING COM 219350105 3,008,161 62,630
2014-02-07 2013-12-31 13F CORNING COM 219350105 3,058,161 -5,800 -0.19 54,496 21.91 0.2902
2013-11-07 2013-09-30 13F CORNING COM 219350105 3,063,961 -34,300 -1.11 44,703 1.39 0.2545
2013-08-02 2013-06-30 13F/A-1 CORNING COM 219350105 3,098,261 3,098,261 44,088 0.2675
2013-08-01 2013-06-30 13F CORNING COM 219350105 3,098,261 44,088 0.2675
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.