Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionTompkins Financial Corp
Latest Disclosed Ownership18,189 shares
Latest Disclosed Value $ 2,473,158
Tompkins Financial Corp reports 15.75% decrease in ownership of GLW / Corning Incorporated

On April 9, 2026 - Tompkins Financial Corp filed a 13F-HR form disclosing ownership of 18,189 shares of Corning Incorporated (MX:GLW) valued at $2,473,158 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 21,589 shares of Corning Incorporated. This represents a change in shares of -15.75% 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)
2026-04-09 2026-03-31 13F CORNING COM 219350105 18,189 -3,400 -15.75 2,473 30.85 0.1737
2026-01-08 2025-12-31 13F CORNING COM 219350105 21,589 -2,875 -11.75 1,890 -5.78 0.1470
2025-10-08 2025-09-30 13F CORNING COM 219350105 24,464 -475 -1.90 2,007 53.01 0.1678
2025-07-10 2025-06-30 13F CORNING COM 219350105 24,939 180 0.73 1,312 15.71 0.1206
2025-04-07 2025-03-31 13F CORNING COM 219350105 24,759 -347 -1.38 1,133 -5.03 0.1085
2025-01-15 2024-12-31 13F CORNING COM 219350105 25,106 -765 -2.96 1,193 2.14 0.1110
2024-11-01 2024-09-30 13F CORNING COM 219350105 25,871 -4,060 -13.56 1,168 0.52 0.1120
2024-07-17 2024-06-30 13F CORNING COM 219350105 29,931 119 0.40 1,163 18.33 0.1218
2024-04-08 2024-03-31 13F CORNING COM 219350105 29,812 1,274 4.46 983 13.13 0.1111
2024-01-08 2023-12-31 13F CORNING COM 219350105 28,538 315 1.12 869 1.05 0.1053
2023-11-21 2023-09-30 13F CORNING COM 219350105 28,223 48 0.17 860 -12.97 0.1354
2023-07-12 2023-06-30 13F CORNING COM 219350105 28,175 6,440 29.63 987 28.85 0.1546
2023-04-20 2023-03-31 13F CORNING COM 219350105 21,735 -4,463 -17.04 767 0.1248
2023-01-06 2022-12-31 13F CORNING COM 219350105 26,198 68 0.26 1 -100.00 0.1321
2022-10-13 2022-09-30 13F CORNING COM 219350105 26,130 1,418 5.74 758 -2.57 0.1279
2022-07-14 2022-06-30 13F CORNING COM 219350105 24,712 -1,788 -6.75 778 -20.45 0.1250
2022-05-12 2022-03-31 13F CORNING COM 219350105 26,500 16,526 165.69 978 163.61 0.1379
2022-01-24 2021-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 9,974 -367 -3.55 371 -1.59 0.0658
2021-10-22 2021-09-30 13F CORNING EQUITIES/EXCHANGE TRADED FUNDS 219350105 10,341 518 5.27 377 -11.71 0.0689
2021-06-09 2021-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 9,823 -18 -0.18 427 20.62 0.0723
2021-02-12 2020-12-31 13F/A-1 CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 9,841 14 0.14 354 11.32 0.0637
2021-02-05 2020-12-31 13F CORNING INC COM US LARGE-CAP EQUITIES 219350105 700 -9,127 14 589.3218
2020-10-23 2020-09-30 13F CORNING EQUITIES/EXCHANGE TRADED FUNDS 219350105 9,827 -347 -3.41 318 20.91 0.0612
2020-07-29 2020-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 10,174 -1,082 -9.61 263 13.85 0.0552
2020-04-22 2020-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 11,256 -103,084 -90.16 231 -93.06 0.0533
2020-01-22 2019-12-31 13F/A-1 CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 114,340 -632 -0.55 3,328 1.49 0.6098
2020-01-15 2019-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 114,972 0 3,279 498,025.5164
2019-10-17 2019-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 114,972 980 0.86 3,279 -13.41 0.6663
2019-07-17 2019-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 113,992 4,546 4.15 3,787 4.58 0.7615
2019-04-30 2019-03-31 13F/A-1 CORNING EQUITIES/EXCHANGE TRADED FUNDS 219350105 109,446 1,642 1.52 3,621 11.21 0.6879
2019-04-17 2019-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 107,533 -271 3,795
2019-01-22 2018-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 107,804 271 0.25 3,256 -14.20 0.7190
2018-10-18 2018-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 107,533 828 0.78 3,795 29.35 0.7783
2018-07-18 2018-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 106,705 -46,336 -30.28 2,934 -31.21 0.6323
2018-04-26 2018-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 153,041 5,510 3.73 4,265 -9.60 0.9554
2018-01-24 2017-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 147,531 2,243 1.54 4,718 8.58 1.0813
2017-10-17 2017-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 145,288 1,629 1.13 4,345 0.70 1.0289
2017-07-11 2017-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 143,659 -1,672 -1.15 4,315 9.96 1.0859
2017-04-17 2017-03-31 13F/A-1 CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 145,331 143,325 7,144.82 3,924 7,908.16 0.9953
2017-04-17 2017-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 1,950 41
2017-01-10 2016-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 2,006 56 2.87 49 6.52 0.0128
2016-10-13 2016-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 1,950 0 0.00 46 15.00 0.0132
2016-07-13 2016-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 1,950 0 0.00 40 -2.44 0.0118
2016-04-20 2016-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 1,950 -56 -2.79 41 10.81 0.0130
2016-01-19 2015-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 2,006 -394 -16.42 37 -9.76 0.0118
2015-10-16 2015-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 2,400 -2,000 -45.45 41 -52.87 0.0133
2015-07-14 2015-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 4,400 0 0.00 87 -13.00 0.0236
2015-04-21 2015-03-31 13F/A-1 CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 4,400 -44 -0.99 100 -1.96 0.0250
2015-04-14 2015-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 4,400 100
2015-01-15 2014-12-31 13F/A-1 CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 4,444 44 1.00 102 20.00 0.0254
2015-01-13 2014-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 6,458 92
2014-10-10 2014-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 4,400 -1,500 -25.42 85 -34.62 0.0223
2014-07-11 2014-06-30 13F CORNING EQUITIES/EXCHANGE TRADED FUNDS 219350105 5,900 -100 -1.67 130 4.00 0.0321
2014-04-10 2014-03-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 6,000 -57 -0.94 125 15.74 0.0316
2014-01-08 2013-12-31 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 6,057 57 0.95 108 22.73 0.0280
2013-10-11 2013-09-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 6,000 -458 -7.09 88 -4.35 0.0246
2013-07-19 2013-06-30 13F CORNING INC COM EQUITIES/EXCHANGE TRADED FUNDS 219350105 6,458 6,458 92 0.0278
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.