Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionColumbia Asset Management
Latest Disclosed Ownership30,656 shares
Latest Disclosed Value $ 4,168,296
Columbia Asset Management reports 11.47% decrease in ownership of GLW / Corning Incorporated

On April 20, 2026 - Columbia Asset Management filed a 13F-HR form disclosing ownership of 30,656 shares of Corning Incorporated (MX:GLW) valued at $4,168,296 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 34,626 shares of Corning Incorporated. This represents a change in shares of -11.47% 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)
2026-04-20 2026-03-31 13F CORNING COM 219350105 30,656 -3,970 -11.47 4,168 37.51 0.7938
2026-01-28 2025-12-31 13F CORNING COM 219350105 34,626 -2,075 -5.65 3,032 0.70 0.5389
2025-11-04 2025-09-30 13F CORNING COM 219350105 36,701 -6,830 -15.69 3,011 31.50 0.5633
2025-07-18 2025-06-30 13F CORNING COM 219350105 43,531 2,500 6.09 2,289 21.88 0.4500
2025-04-10 2025-03-31 13F CORNING COM 219350105 41,031 -7,125 -14.80 1,878 -17.92 0.3674
2025-02-12 2024-12-31 13F CORNING COM 219350105 48,156 5,401 12.63 2,288 228,700.00 0.4182
2024-11-12 2024-09-30 13F Corning COM 219350105 42,755 5,730 15.48 2 0.00 0.3364
2024-08-05 2024-06-30 13F Corning COM 219350105 37,025 22,021 146.77 1 0.2681
2024-05-08 2024-03-31 13F Corning COM 219350105 15,004 0 0.00 0 0.0927
2024-02-09 2023-12-31 13F Corning COM 219350105 15,004 -500 -3.22 0 0.0927
2023-11-13 2023-09-30 13F Corning COM 219350105 15,504 0 0.00 0 0.1042
2023-08-14 2023-06-30 13F Corning COM 219350105 15,504 -1,100 -6.62 1 0.1155
2023-05-15 2023-03-31 13F Corning COM 219350105 16,604 -1,800 -9.78 1 0.1318
2023-02-10 2022-12-31 13F Corning COM 219350105 18,404 -2,500 -11.96 1 -100.00 0.1428
2022-11-03 2022-09-30 13F Corning COM 219350105 20,904 -7,450 -26.27 607 -32.03 0.1595
2022-08-26 2022-06-30 13F Corning COM 219350105 28,354 -29,751 -51.20 893 -58.71 0.2264
2022-02-14 2021-12-31 13F Corning COM 219350105 58,105 -11,732 -16.80 2,163 -15.11 0.4386
2021-11-15 2021-09-30 13F Corning COM 219350105 69,837 -2,771 -3.82 2,548 -14.21 0.5558
2021-08-02 2021-06-30 13F Corning COM 219350105 72,608 -5,966 -7.59 2,970 -13.13 0.6591
2021-05-28 2021-03-31 13F Corning COM 219350105 78,574 10,189 14.90 3,419 38.87 0.6203
2021-02-11 2020-12-31 13F Corning COM 219350105 68,385 31,410 84.95 2,462 105.51 0.4960
2020-11-16 2020-09-30 13F Corning COM 219350105 36,975 14,175 62.17 1,198 102.71 0.2744
2020-08-14 2020-06-30 13F Corning COM 219350105 22,800 -2,295 -9.15 591 14.76 0.1415
2020-05-14 2020-03-31 13F Corning COM 219350105 25,095 -27,600 -52.38 515 -96.64 0.1271
2020-02-14 2019-12-31 13F Corning COM 219350105 52,695 -6,925 -11.62 15,340 802.35 0.3696
2019-11-12 2019-09-30 13F Corning COM 219350105 59,620 0 0.00 1,700 -14.18 0.4425
2019-08-15 2019-06-30 13F Corning COM 219350105 59,620 -3,300 -5.24 1,981 -4.90 0.5214
2019-05-20 2019-03-31 13F Corning COM 219350105 62,920 0 0.00 2,083 9.57 0.5559
2019-02-12 2018-12-31 13F Corning COM 219350105 62,920 -750 -1.18 1,901 -15.44 0.5778
2018-11-06 2018-09-30 13F Corning COM 219350105 63,670 -1,275 -1.96 2,248 25.80 0.5867
2018-08-14 2018-06-30 13F Corning COM 219350105 64,945 0 0.00 1,787 -1.33 0.5199
2018-05-07 2018-03-31 13F Corning COM 219350105 64,945 500 0.78 1,811 -12.17 0.5310
2018-02-05 2017-12-31 13F Corning COM 219350105 64,445 0 0.00 2,062 6.95 0.5918
2017-11-07 2017-09-30 13F Corning COM 219350105 64,445 -4,560 -6.61 1,928 -6.99 0.5924
2017-08-10 2017-06-30 13F Corning COM 219350105 69,005 890 1.31 2,073 12.72 0.6687
2017-05-11 2017-03-31 13F Corning COM 219350105 68,115 -1,950 -2.78 1,839 8.18 0.6156
2017-02-14 2016-12-31 13F/A-1 Corning COM 219350105 70,065 -4,855 -6.48 1,700 -4.06 0.5739
2017-01-25 2016-12-31 13F Corning COM 219350105 70,065 1,700
2016-11-01 2016-09-30 13F Corning COM 219350105 74,920 -5,775 -7.16 1,772 7.20 0.6213
2016-08-08 2016-06-30 13F Corning COM 219350105 80,695 -2,000 -2.42 1,653 -4.28 0.5889
2016-05-17 2016-03-31 13F/A-1 Corning COM 219350105 82,695 -16,575 -16.70 1,727 -4.85 0.6346
2016-05-17 2016-03-31 13F Corning COM 219350105 99,270 1,815
2016-02-08 2015-12-31 13F Corning COM 219350105 99,270 3,325 3.47 1,815 10.47 0.7285
2015-11-16 2015-09-30 13F Corning COM 219350105 95,945 -5,150 -5.09 1,643 -17.60 0.6683
2015-08-11 2015-06-30 13F Corning COM 219350105 101,095 5,650 5.92 1,994 -7.90 0.7591
2015-05-11 2015-03-31 13F Corning COM 219350105 95,445 -7,850 -7.60 2,165 -8.61 0.8146
2015-02-24 2014-12-31 13F Corning COM 219350105 103,295 -1,700 -1.62 2,369 16.64 0.9121
2014-11-17 2014-09-30 13F CORNING COM 219350105 104,995 -11,055 -9.53 2,031 -20.26 0.8203
2014-08-25 2014-06-30 13F CORNING COM 219350105 116,050 -3,610 -3.02 2,547 2.25 1.0326
2014-05-23 2014-03-31 13F CORNING COM 219350105 119,660 -3,270 -2.66 2,491 13.69 1.0834
2014-02-11 2013-12-31 13F CORNING COM 219350105 122,930 122,930 2,191 0.9691
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.