Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionCulbertson A N & Co Inc
Latest Disclosed Ownership66,541 shares
Latest Disclosed Value $ 9,047,580
Culbertson A N & Co Inc reports 24.61% decrease in ownership of GLW / Corning Incorporated

On May 12, 2026 - Culbertson A N & Co Inc filed a 13F-HR form disclosing ownership of 66,541 shares of Corning Incorporated (MX:GLW) valued at $9,047,580 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 88,265 shares of Corning Incorporated. This represents a change in shares of -24.61% 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)
2026-05-12 2026-03-31 13F CORNING COM 219350105 66,541 -21,724 -24.61 9,048 17.07 1.1737
2026-01-21 2025-12-31 13F CORNING COM 219350105 88,265 -960 -1.08 7,728 5.59 1.0603
2025-10-24 2025-09-30 13F CORNING COM 219350105 89,225 -916 -1.02 7,319 54.41 1.0358
2025-08-11 2025-06-30 13F CORNING COM 219350105 90,141 -880 -0.97 4,741 13.78 0.7278
2025-05-15 2025-03-31 13F CORNING COM 219350105 91,021 -358 -0.39 4,167 -4.05 0.6656
2025-01-16 2024-12-31 13F CORNING COM 219350105 91,379 -380 -0.41 4,342 4.83 0.6907
2024-10-16 2024-09-30 13F CORNING COM 219350105 91,759 1,700 1.89 4,143 18.41 0.6670
2024-07-30 2024-06-30 13F CORNING COM 219350105 90,059 -6,990 -7.20 3,499 9.38 0.6110
2024-04-30 2024-03-31 13F CORNING COM 219350105 97,049 -6,268 -6.07 3,199 1.65 0.5522
2024-01-19 2023-12-31 13F CORNING COM 219350105 103,317 -12,764 -11.00 3,146 -11.03 0.5851
2023-10-18 2023-09-30 13F CORNING COM 219350105 116,081 -1,590 -1.35 3,537 -14.24 0.7098
2023-07-18 2023-06-30 13F CORNING COM 219350105 117,671 -2,740 -2.28 4,123 -2.94 0.7968
2023-05-08 2023-03-31 13F CORNING COM 219350105 120,411 -2,610 -2.12 4,248 8.12 0.8677
2023-01-23 2022-12-31 13F CORNING COM 219350105 123,021 -625 -0.51 3,929 9.50 0.8276
2022-10-13 2022-09-30 13F Corning COM 219350105 123,646 -350 -0.28 3,588 -8.16 0.8326
2022-07-21 2022-06-30 13F Corning COM 219350105 123,996 0 0.00 3,907 -14.62 0.8473
2022-04-19 2022-03-31 13F Corning COM 219350105 123,996 3,060 2.53 4,576 1.64 0.8614
2022-01-14 2021-12-31 13F Corning COM 219350105 120,936 -4,900 -3.89 4,502 -1.94 0.8479
2021-10-22 2021-09-30 13F Corning COM 219350105 125,836 3,200 2.61 4,591 -8.47 0.9395
2021-07-26 2021-06-30 13F CORNING COM 219350105 122,636 -1,050 -0.85 5,016 -6.80 1.0448
2021-04-22 2021-03-31 13F CORNING COM 219350105 123,686 927 0.76 5,382 21.79 1.1849
2021-01-27 2020-12-31 13F CORNING COM 219350105 122,759 -1,180 -0.95 4,419 10.01 1.0504
2020-10-30 2020-09-30 13F CORNING COM 219350105 123,939 3,337 2.77 4,017 28.59 1.0607
2020-07-24 2020-06-30 13F CORNING COM 219350105 120,602 -1,875 -1.53 3,124 24.17 0.8580
2020-04-27 2020-03-31 13F CORNING COM 219350105 122,477 -1,885 -1.52 2,516 -30.50 0.8140
2020-01-27 2019-12-31 13F CORNING COM 219350105 124,362 -3,468 -2.71 3,620 -0.71 0.9327
2019-10-28 2019-09-30 13F CORNING COM 219350105 127,830 2,090 1.66 3,646 -12.73 0.9951
2019-07-24 2019-06-30 13F CORNING COM 219350105 125,740 2,120 1.71 4,178 2.10 1.1614
2019-04-17 2019-03-31 13F CORNING COM 219350105 123,620 -1,415 -1.13 4,092 8.34 1.1794
2019-01-25 2018-12-31 13F CORNING COM 219350105 125,035 -4,687 -3.61 3,777 -17.51 1.2030
2018-10-22 2018-09-30 13F CORNING COM 219350105 129,722 4,175 3.33 4,579 32.57 1.2476
2018-07-18 2018-06-30 13F CORNING COM 219350105 125,547 6,865 5.78 3,454 4.38 1.0272
2018-04-18 2018-03-31 13F CORNING COM 219350105 118,682 3,003 2.60 3,309 -10.59 0.9897
2018-01-22 2017-12-31 13F CORNING COM 219350105 115,679 -50 -0.04 3,701 6.87 1.0437
2017-10-18 2017-09-30 13F CORNING COM 219350105 115,729 3,070 2.73 3,463 2.30 1.0568
2017-07-18 2017-06-30 13F CORNING COM 219350105 112,659 -100 -0.09 3,385 11.20 1.0734
2017-04-21 2017-03-31 13F CORNING COM 219350105 112,759 -1,355 -1.19 3,044 9.89 0.9911
2017-01-23 2016-12-31 13F CORNING COM 219350105 114,114 783 0.69 2,770 3.36 0.9426
2016-10-12 2016-09-30 13F CORNING COM 219350105 113,331 -400 -0.35 2,680 15.07 0.9529
2016-07-13 2016-06-30 13F CORNING COM 219350105 113,731 8,800 8.39 2,329 6.25 0.8614
2016-04-14 2016-03-31 13F CORNING COM 219350105 104,931 -1,860 -1.74 2,192 12.30 0.8510
2016-01-19 2015-12-31 13F Corning COM 219350105 106,791 -2,660 -2.43 1,952 4.16 0.7718
2015-10-16 2015-09-30 13F Corning COM 219350105 109,451 797 0.73 1,874 -12.55 0.7907
2015-07-16 2015-06-30 13F Corning COM 219350105 108,654 7,405 7.31 2,143 -6.66 0.8357
2015-04-21 2015-03-31 13F Corning COM 219350105 101,249 101,249 0.00 2,296 0.9141
2015-01-26 2014-12-31 13F Corning COM 219350105 0 -102,479 -100.00 0 -100.00
2014-10-16 2014-09-30 13F Corning COM 219350105 102,479 -3,040 -2.88 1,982 -14.42 0.8533
2014-07-22 2014-06-30 13F Corning COM 219350105 105,519 1,649 1.59 2,316 7.07 1.0071
2014-04-16 2014-03-31 13F Corning COM 219350105 103,870 -1,325 -1.26 2,163 15.36 1.0076
2014-01-21 2013-12-31 13F Corning COM 219350105 105,195 -3,915 -3.59 1,875 17.78 0.9126
2013-10-16 2013-09-30 13F Corning COM 219350105 109,110 -5,210 -4.56 1,592 -2.15 0.8529
2013-07-19 2013-06-30 13F Corning COM 219350105 114,320 114,320 1,627 0.9157
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.