Corning Incorporated
US ˙ NYSE ˙ US2193501051

SecurityGLW / Corning Incorporated
InstitutionKBC Group NV
Latest Disclosed Ownership1,420,527 shares
Latest Disclosed Value $ 193,148
KBC Group NV reports 5.37% increase in ownership of GLW / Corning Incorporated

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 1,420,527 shares of Corning Incorporated (US:GLW) valued at $193,149,056 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,348,164 shares of Corning Incorporated. This represents a change in shares of 5.37% during the quarter. The current value of the position is $285,185,001 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)
2026-05-07 2026-03-31 13F CORNING COM 219350105 1,420,527 72,363 5.37 193 63.56 0.2491
2026-01-26 2025-12-31 13F CORNING COM 219350105 1,348,164 935,282 226.53 118 257.58 0.2692
2026-01-20 2025-09-30 13F CORNING COM 219350105 412,882 190,958 86.05 34 200.00 0.0812
2025-08-08 2025-06-30 13F CORNING COM 219350105 221,924 -801 -0.36 12 10.00 0.0315
2025-04-25 2025-03-31 13F CORNING COM 219350105 222,725 100,086 81.61 10 100.00 0.0316
2025-01-22 2024-12-31 13F CORNING COM 219350105 122,639 -2,181 -1.75 6 0.00 0.0161
2024-11-06 2024-09-30 13F CORNING COM 219350105 124,820 20,474 19.62 6 25.00 0.0170
2024-07-17 2024-06-30 13F CORNING COM 219350105 104,346 12,412 13.50 4 33.33 0.0122
2024-05-08 2024-03-31 13F CORNING COM 219350105 91,934 594 0.65 3 50.00 0.0096
2024-02-13 2023-12-31 13F CORNING COM 219350105 91,340 12,160 15.36 3 0.00 0.0099
2024-02-15 2023-09-30 13F/A-1 CORNING COM 219350105 79,180 -1,588 -1.97 2 0.00 0.0098
2023-11-22 2023-09-30 13F CORNING COM 219350105 79,033 0 3 0.0115
2024-02-15 2023-06-30 13F/A-1 CORNING COM 219350105 80,768 -30,732 -27.56 3 -33.33 0.0116
2023-07-28 2023-06-30 13F CORNING COM 219350105 79,033 -31,198 3 0.0115
2024-02-14 2023-03-31 13F/A-1 CORNING COM 219350105 111,500 -13,666 -10.92 4 0.00 0.0167
2023-05-04 2023-03-31 13F CORNING COM 219350105 110,231 -4,982 4 0.0183
2024-02-14 2022-12-31 13F/A-1 CORNING COM 219350105 125,166 9,132 7.87 4 0.00 0.0194
2023-02-13 2022-12-31 13F CORNING COM 219350105 115,213 -821 3 0.0000
2024-02-15 2022-09-30 13F/A-1 CORNING COM 219350105 116,034 -11,570 -9.07 3 -25.00 0.0175
2022-11-08 2022-09-30 13F CORNING COM 219350105 115,213 -12,391 3,343 0.0175
2024-02-14 2022-06-30 13F/A-1 CORNING COM 219350105 127,604 -10,147 -7.37 4 -20.00 0.0201
2022-07-26 2022-06-30 13F CORNING COM 219350105 126,783 -10,968 3,995 0.0201
2024-02-14 2022-03-31 13F/A-1 CORNING COM 219350105 137,751 4,138 3.10 5 25.00 0.0201
2022-05-06 2022-03-31 13F CORNING COM 219350105 137,751 4,138 5,084 0.0188
2024-02-14 2021-12-31 13F/A-1 CORNING COM 219350105 133,613 -1,752,296 -92.92 5 -99.99 0.0164
2022-02-03 2021-12-31 13F CORNING COM 219350105 133,613 -1,752,296 4,974 0.0156
2021-11-10 2021-09-30 13F CORNING COM 219350105 1,885,909 -239,939 -11.29 68,816 -20.85 0.2523
2022-02-15 2021-06-30 13F/A-1 CORNING COM 219350105 2,125,848 134,290 6.74 86,947 0.34 0.3134
2021-08-11 2021-06-30 13F CORNING COM 219350105 2,125,848 134,290 86,947 0.3134
2022-02-14 2021-03-31 13F/A-1 CORNING COM 219350105 1,991,558 527,143 36.00 86,653 -83.56 0.3509
2021-04-26 2021-03-31 13F CORNING COM 219350105 1,991,558 527,143 86,653 0.3509
2022-02-14 2020-12-31 13F/A-1 CORNING COM 219350105 1,464,415 1,124,877 331.30 527,190 4,690.89 0.2480
2021-02-10 2020-12-31 13F CORNING COM 219350105 1,464,415 1,124,877 52,718 0.2426
2022-02-14 2020-09-30 13F/A-1 CORNING COM 219350105 339,538 235,157 225.29 11,004 307.10 0.0648
2020-10-28 2020-09-30 13F CORNING COM 219350105 339,538 235,157 11,004 0.0651
2022-02-14 2020-06-30 13F/A-1 CORNING COM 219350105 104,381 -21,419 -17.03 2,703 4.61 0.0179
2020-08-10 2020-06-30 13F CORNING COM 219350105 104,381 -21,419 2,704 0.0181
2020-05-04 2020-03-31 13F CORNING COM 219350105 125,800 2,616 2.12 2,584 -27.92 0.0216
2020-02-11 2019-12-31 13F CORNING COM 219350105 123,184 -839,027 -87.20 3,585 -86.94 0.0227
2019-11-07 2019-09-30 13F CORNING COM 219350105 962,211 961,301 105,637.47 27,442 91,373.33 0.2013
2019-12-03 2019-06-30 13F/A-2 CORNING COM 219350105 910 0 0.00 30 0.00 0.2606
2019-08-08 2019-06-30 13F/A-1 CORNING COM 219350105 1,190,122 1,189,212 39,548 0.3062
2019-07-30 2019-06-30 13F CORNING COM 219350105 1,190,122 -440,856 39,548
2019-12-03 2019-03-31 13F/A-2 CORNING COM 219350105 910 0 0.00 30 11.11 0.2727
2019-08-07 2019-03-31 13F/A-1 CORNING COM 219350105 871,974 871,064 28,862 0.2378
2019-05-10 2019-03-31 13F CORNING COM 219350105 871,974 -323,743 28,862
2019-12-03 2018-12-31 13F/A-1 CORNING COM 219350105 910 310 51.67 27 28.57 0.3154
2019-01-31 2018-12-31 13F CORNING COM 219350105 1,195,717 -166,105 36,122 402,393.6866
2019-12-03 2018-09-30 13F/A-1 CORNING COM 219350105 600 0 0.00 21 23.53 0.2072
2018-11-14 2018-09-30 13F CORNING COM 219350105 1,361,822 1,361,222 48,072 363,638.5917
2019-12-03 2018-06-30 13F/A-1 CORNING COM 219350105 600 0 0.00 17 0.00 0.1878
2018-08-03 2018-06-30 13F CORNING COM 219350105 1,484,497 -77,912 40,838 355,544.3652
2019-12-03 2018-03-31 13F/A-2 CORNING COM 219350105 600 -1,570,308 -99.96 17 -99.97 0.1812
2018-08-03 2018-03-31 13F/A-1 CORNING COM 219350105 1,562,409 1,561,809 43,560 0.4030
2018-05-09 2018-03-31 13F CORNING COM 219350105 1,562,409 -8,499 43,560
2018-08-03 2017-12-31 13F/A-1 CORNING COM 219350105 1,570,908 -357,249 -18.53 50,253 -12.89 0.4297
2018-02-07 2017-12-31 13F CORNING COM 219350105 1,570,908 -357,249 50,253
2017-11-13 2017-09-30 13F CORNING COM 219350105 1,928,157 57,645 3.08 57,690 2.63 0.5236
2017-08-04 2017-06-30 13F CORNING COM 219350105 1,870,512 -506,271 -21.30 56,210 -12.41 0.5432
2017-05-10 2017-03-31 13F CORNING COM 219350105 2,376,783 731,863 44.49 64,173 60.74 0.5793
2017-02-16 2016-12-31 13F CORNING COM 219350105 1,644,920 1,090,067 196.46 39,923 204.22 0.3957
2016-11-03 2016-09-30 13F CORNING COM 219350105 554,853 204,063 58.17 13,123 82.67 0.1550
2016-08-03 2016-06-30 13F CORNING COM 219350105 350,790 -185,502 -34.59 7,184 -35.87 0.1028
2016-05-11 2016-03-31 13F CORNING COM 219350105 536,292 321,633 149.83 11,203 185.50 0.1861
2016-02-11 2015-12-31 13F CORNING COM 219350105 214,659 -9,017 -4.03 3,924 2.48 0.0723
2015-11-12 2015-09-30 13F CORNING COM 219350105 223,676 -410,232 -64.71 3,829 -69.39 0.0770
2015-12-16 2015-06-30 13F/A-1 CORNING COM 219350105 633,908 17,132 2.78 12,507 -10.59 0.1608
2015-07-31 2015-06-30 13F CORNING COM 219350105 633,908 12,507
2015-12-16 2015-03-31 13F/A-1 CORNING COM 219350105 616,776 135,584 28.18 13,989 26.78 0.1777
2015-04-30 2015-03-31 13F CORNING COM 219350105 616,776 13,989
2015-12-15 2014-12-31 13F/A-1 CORNING COM 219350105 481,192 13,601 2.91 11,034 22.02 0.1314
2015-02-12 2014-12-31 13F CORNING COM 219350105 481,192 11,034
2014-10-16 2014-09-30 13F CORNING COM 219350105 467,591 -450,579 -49.07 9,043 -55.13 0.3156
2014-08-01 2014-06-30 13F CORNING COM 219350105 918,170 766,320 504.66 20,154 537.58 0.2302
2014-04-30 2014-03-31 13F CORNING COM 219350105 151,850 -100,411 -39.80 3,161 -29.68 0.0499
2014-01-21 2013-12-31 13F CORNING COM 219350105 252,261 -46,163 -15.47 4,495 3.24 0.0680
2013-11-06 2013-09-30 13F CORNING COM 219350105 298,424 -66,434 -18.21 4,354 -16.14 0.0701
2013-07-29 2013-06-30 13F CORNING COM 219350105 364,858 364,858 5,192 0.0963
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.