Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionCohen Klingenstein LLC
Latest Disclosed Ownership22,130 shares
Latest Disclosed Value $ 3,009,016
Cohen Klingenstein LLC ownership in GLW / Corning Incorporated

On April 15, 2026 - Cohen Klingenstein LLC filed a 13F-HR form disclosing ownership of 22,130 shares of Corning Incorporated (MX:GLW) valued at $3,009,016 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 22,130 shares of Corning Incorporated. This represents a change in shares of 0.00% 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)
2026-04-15 2026-03-31 13F Corning COM 219350105 22,130 0 0.00 3,009 55.34 0.0974
2026-01-20 2025-12-31 13F Corning COM 219350105 22,130 0 0.00 1,938 6.72 0.0589
2025-10-16 2025-09-30 13F Corning COM 219350105 22,130 -27,800 -55.68 1,815 -30.86 0.0569
2025-07-18 2025-06-30 13F Corning COM 219350105 49,930 0 0.00 2,626 14.88 0.0876
2025-04-15 2025-03-31 13F Corning COM 219350105 49,930 0 0.00 2,286 -3.67 0.0828
2025-01-15 2024-12-31 13F Corning COM 219350105 49,930 -8,650 -14.77 2,373 -10.29 0.0812
2024-10-16 2024-09-30 13F Corning COM 219350105 58,580 -3,800 -6.09 2,645 9.12 0.0921
2024-07-15 2024-06-30 13F Corning COM 219350105 62,380 -5,370 -7.93 2,423 8.51 0.0880
2024-04-12 2024-03-31 13F Corning COM 219350105 67,750 0 0.00 2,233 8.29 0.0831
2024-01-16 2023-12-31 13F Corning COM 219350105 67,750 0 0.00 2,063 -0.10 0.0844
2023-10-13 2023-09-30 13F Corning COM 219350105 67,750 0 0.00 2,064 -13.02 0.0935
2023-07-14 2023-06-30 13F Corning COM 219350105 67,750 0 0.00 2,374 -0.71 0.1028
2023-04-14 2023-03-31 13F Corning COM 219350105 67,750 0 0.00 2,390 10.49 0.1122
2023-01-13 2022-12-31 13F Corning COM 219350105 67,750 0 0.00 2,164 10.02 0.1089
2022-10-12 2022-09-30 13F Corning COM 219350105 67,750 0 0.00 1,966 -7.92 0.1042
2022-07-15 2022-06-30 13F Corning COM 219350105 67,750 0 0.00 2,135 -14.63 0.1071
2022-04-14 2022-03-31 13F Corning COM 219350105 67,750 0 0.00 2,501 -0.83 0.1039
2022-01-14 2021-12-31 13F Corning COM 219350105 67,750 -15,400 -18.52 2,522 -16.88 0.0997
2021-10-15 2021-09-30 13F Corning COM 219350105 83,150 -13,500 -13.97 3,034 -23.25 0.1326
2021-07-16 2021-06-30 13F Corning COM 219350105 96,650 0 0.00 3,953 -5.99 0.1699
2021-04-15 2021-03-31 13F Corning COM 219350105 96,650 0 0.00 4,205 20.87 0.1940
2021-01-25 2020-12-31 13F/A-1 Corning COM 219350105 96,650 0 0.00 3,479 11.08 0.1738
2021-01-19 2020-12-31 13F Corning COM 219350105 96,650 0 3,479 173,746.0222
2020-10-19 2020-09-30 13F Corning COM 219350105 96,650 0 0.00 3,132 25.13 0.1765
2020-07-15 2020-06-30 13F Corning COM 219350105 96,650 0 0.00 2,503 26.10 0.1536
2020-04-15 2020-03-31 13F Corning COM 219350105 96,650 0 0.00 1,985 -29.43 0.1468
2020-01-15 2019-12-31 13F Corning COM 219350105 96,650 0 0.00 2,813 2.07 0.1634
2019-10-17 2019-09-30 13F Corning COM 219350105 96,650 0 0.00 2,756 -14.20 0.1732
2019-07-15 2019-06-30 13F Corning COM 219350105 96,650 0 0.00 3,212 0.41 0.2288
2019-04-16 2019-03-31 13F Corning COM 219350105 96,650 0 0.00 3,199 9.55 0.2230
2019-01-18 2018-12-31 13F Corning COM 219350105 96,650 0 0.00 2,920 -14.42 0.4412
2018-10-15 2018-09-30 13F Corning COM 219350105 96,650 0 0.00 3,412 28.32 0.4339
2018-07-13 2018-06-30 13F Corning COM 219350105 96,650 0 0.00 2,659 -1.34 0.3635
2018-04-13 2018-03-31 13F Corning COM 219350105 96,650 0 0.00 2,695 -12.84 0.3825
2018-01-16 2017-12-31 13F Corning COM 219350105 96,650 0 0.00 3,092 6.92 0.4396
2017-10-17 2017-09-30 13F Corning COM 219350105 96,650 0 0.00 2,892 -0.41 0.4366
2017-07-17 2017-06-30 13F Corning COM 219350105 96,650 0 0.00 2,904 11.26 0.4522
2017-04-13 2017-03-31 13F Corning COM 219350105 96,650 0 0.00 2,610 11.25 0.4177
2017-01-17 2016-12-31 13F Corning COM 219350105 96,650 0 0.00 2,346 2.62 0.4008
2016-10-14 2016-09-30 13F Corning COM 219350105 96,650 0 0.00 2,286 15.51 0.3969
2016-07-15 2016-06-30 13F Corning COM 219350105 96,650 0 0.00 1,979 -1.98 0.3639
2016-04-18 2016-03-31 13F Corning COM 219350105 96,650 -1,255 -1.28 2,019 12.79 0.3804
2016-01-20 2015-12-31 13F Corning COM 219350105 97,905 0 0.00 1,790 6.80 0.3336
2015-10-15 2015-09-30 13F Corning COM 219350105 97,905 0 0.00 1,676 -13.25 0.3305
2015-07-15 2015-06-30 13F Corning COM 219350105 97,905 0 0.00 1,932 -12.97 0.3475
2015-04-14 2015-03-31 13F Corning COM 219350105 97,905 -70 -0.07 2,220 -1.20 0.4052
2015-01-13 2014-12-31 13F Corning COM 219350105 97,975 0 0.00 2,247 18.58 0.4216
2014-10-14 2014-09-30 13F Corning COM 219350105 97,975 0 0.00 1,895 -11.90 0.3343
2014-07-15 2014-06-30 13F Corning COM 219350105 97,975 0 0.00 2,151 5.44 0.4107
2014-04-15 2014-03-31 13F Corning COM 219350105 97,975 0 0.00 2,040 16.84 0.4054
2014-01-14 2013-12-31 13F Corning COM 219350105 97,975 0 0.00 1,746 22.18 0.3469
2013-10-15 2013-09-30 13F Corning COM 219350105 97,975 0 0.00 1,429 2.51 0.3118
2013-07-30 2013-06-30 13F Corning COM 219350105 97,975 97,975 1,394 0.3243
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.