Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionPrivate Trust Co Na
Latest Disclosed Ownership12,810 shares
Latest Disclosed Value $ 1,741,776
Private Trust Co Na reports 13.66% decrease in ownership of GLW / Corning Incorporated

On April 30, 2026 - Private Trust Co Na filed a 13F-HR form disclosing ownership of 12,810 shares of Corning Incorporated (MX:GLW) valued at $1,741,776 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 14,837 shares of Corning Incorporated. This represents a change in shares of -13.66% 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)
2026-04-30 2026-03-31 13F Corning Com 219350105 12,810 -2,027 -13.66 1,742 34.03 0.1555
2026-01-26 2025-12-31 13F Corning Com 219350105 14,837 3,101 26.42 1,299 35.03 0.1138
2025-10-15 2025-09-30 13F Corning Com 219350105 11,736 -446 -3.66 963 50.31 0.0849
2025-07-29 2025-06-30 13F Corning Com 219350105 12,182 1,620 15.34 641 32.51 0.0610
2025-04-28 2025-03-31 13F Corning Com 219350105 10,562 335 3.28 484 -0.41 0.0498
2025-02-05 2024-12-31 13F Corning Com 219350105 10,227 -421 -3.95 486 1.04 0.0499
2024-11-13 2024-09-30 13F Corning Com 219350105 10,648 -5 -0.05 481 16.22 0.0484
2024-07-23 2024-06-30 13F Corning Com 219350105 10,653 1,110 11.63 414 31.53 0.0446
2024-04-24 2024-03-31 13F Corning Com 219350105 9,543 211 2.26 315 10.56 0.0340
2024-01-24 2023-12-31 13F Corning Com 219350105 9,332 -11,441 -55.08 284 -55.06 0.0334
2023-10-18 2023-09-30 13F Corning Com 219350105 20,773 -176 -0.84 633 -13.90 0.0835
2023-07-28 2023-06-30 13F Corning Com 219350105 20,949 -7 -0.03 734 -0.68 0.0926
2023-04-12 2023-03-31 13F Corning Com 219350105 20,956 15,414 278.13 739 0.1008
2023-01-18 2022-12-31 13F Corning Com 219350105 5,542 677 13.92 0 -100.00 0.0263
2022-10-17 2022-09-30 13F Corning Com 219350105 4,865 -28 -0.57 141 -8.44 0.0229
2022-09-16 2022-06-30 13F/A-1 Corning Com 219350105 4,893 -18,683 -79.25 154 -82.30 0.0239
2022-07-13 2022-06-30 13F Corning Equities 219350105 23,576 0 870 0.1359
2022-04-12 2022-03-31 13F Corning Equities 219350105 23,576 -31 -0.13 870 -1.02 0.1359
2022-01-10 2021-12-31 13F Corning Equities 219350105 23,607 -2,581 -9.86 879 -8.05 0.1214
2021-10-06 2021-09-30 13F Corning Equities 219350105 26,188 2,620 11.12 956 -0.83 0.1392
2021-07-07 2021-06-30 13F Corning Equities 219350105 23,568 769 3.37 964 -2.72 0.1460
2021-04-06 2021-03-31 13F Corning Equities 219350105 22,799 2,005 9.64 991 32.49 0.1610
2021-01-05 2020-12-31 13F Corning Equities 219350105 20,794 9,742 88.15 748 108.94 0.1260
2020-10-01 2020-09-30 13F Corning Equities 219350105 11,052 -2,670 -19.46 358 0.56 0.0691
2020-07-07 2020-06-30 13F Corning Equities 219350105 13,722 13,722 356 0.0746
2020-04-07 2020-03-31 13F Corning Equities 219350105 0 -22,423 -100.00 0 -100.00
2020-01-02 2019-12-31 13F Corning Equities 219350105 22,423 -9,094 -28.85 652 -27.39 0.1210
2019-10-01 2019-09-30 13F Corning Equities 219350105 31,517 -18,299 -36.73 898 -45.74 0.1770
2019-07-02 2019-06-30 13F Corning Equities 219350105 49,816 6,361 14.64 1,655 15.09 0.3337
2019-04-02 2019-03-31 13F Corning Equities 219350105 43,455 2,928 7.22 1,438 17.48 0.2991
2019-01-03 2018-12-31 13F Corning Equities 219350105 40,527 1,056 2.68 1,224 -12.13 0.2907
2018-10-09 2018-09-30 13F Corning Equities 219350105 39,471 -5,113 -11.47 1,393 13.62 0.2842
2018-07-03 2018-06-30 13F Corning Equities 219350105 44,584 2,235 5.28 1,226 3.90 0.2658
2018-04-03 2018-03-31 13F Corning Equities 219350105 42,349 4,731 12.58 1,180 -1.91 0.2579
2018-01-16 2017-12-31 13F Corning Equities 219350105 37,618 -508 -1.33 1,203 5.53 0.2546
2017-10-12 2017-09-30 13F Corning Equities 219350105 38,126 9,383 32.64 1,140 32.10 0.2481
2017-07-11 2017-06-30 13F Corning Equities 219350105 28,743 0 0.00 863 11.21 0.1882
2017-04-13 2017-03-31 13F Corning Equities 219350105 28,743 -628 -2.14 776 8.99 0.1794
2017-01-17 2016-12-31 13F Corning Equities 219350105 29,371 138 0.47 712 3.04 0.1705
2016-10-13 2016-09-30 13F Corning Equities 219350105 29,233 1,121 3.99 691 20.17 0.1684
2016-07-19 2016-06-30 13F Corning Equities 219350105 28,112 -17,019 -37.71 575 -38.96 0.1496
2016-04-18 2016-03-31 13F Corning Equities 219350105 45,131 -7,349 -14.00 942 -1.77 0.2552
2016-01-19 2015-12-31 13F Corning Equities 219350105 52,480 9,385 21.78 959 30.12 0.2731
2015-10-27 2015-09-30 13F Corning Equities 219350105 43,095 -8,579 -16.60 737 -27.67 0.2208
2015-07-10 2015-06-30 13F Corning Equities 219350105 51,674 5,865 12.80 1,019 -1.83 0.2921
2015-04-09 2015-03-31 13F Corning Equities 219350105 45,809 45,809 0.00 1,038 0.2972
2015-01-28 2014-12-31 13F Corning Com 219350105 0 -37,310 -100.00 0 -100.00
2014-10-09 2014-09-30 13F Corning Com 219350105 37,310 14,193 61.40 722 42.41 0.2451
2014-07-22 2014-06-30 13F Corning Com 219350105 23,117 209 0.91 507 6.29 0.1651
2014-04-07 2014-03-31 13F Corning Com 219350105 22,908 -302 -1.30 477 15.22 0.1799
2014-01-08 2013-12-31 13F Corning Com 219350105 23,210 1,344 6.15 414 29.78 0.1665
2013-10-07 2013-09-30 13F Corning Com 219350105 21,866 -420 -1.88 319 0.63 0.1443
2013-08-01 2013-06-30 13F Corning Com 219350105 22,286 0 0.00 317 0.00 0.1455
2013-07-26 2013-03-31 13F Corning Com 219350105 22,286 22,286 317 0.1455
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.