Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionBRYN MAWR TRUST Co
Latest Disclosed Ownership294,342 shares
Latest Disclosed Value $ 40,021,681
BRYN MAWR TRUST Co reports 3.20% decrease in ownership of GLW / Corning Incorporated

On April 30, 2026 - BRYN MAWR TRUST Co filed a 13F-HR form disclosing ownership of 294,342 shares of Corning Incorporated (MX:GLW) valued at $40,021,681 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 304,072 shares of Corning Incorporated. This represents a change in shares of -3.20% 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 294,342 -9,730 -3.20 40,022 50.32 0.7109
2026-02-12 2025-12-31 13F CORNING COM 219350105 304,072 -5,031 -1.63 26,625 5.00 0.6247
2025-11-20 2025-09-30 13F/A-1 CORNING COM 219350105 309,103 -15,133 -4.67 25,356 48.70 0.6112
2025-10-28 2025-09-30 13F CORNING COM 219350105 319,546 -4,690 26,212 0.2904
2025-07-28 2025-06-30 13F CORNING COM 219350105 324,236 -18,870 -5.50 17,052 8.56 0.3034
2025-05-08 2025-03-31 13F CORNING COM 219350105 343,106 -13,305 -3.73 15,707 -7.26 0.2935
2025-01-28 2024-12-31 13F CORNING COM 219350105 356,411 -9,201 -2.52 16,937 2.60 0.3049
2024-11-25 2024-09-30 13F CORNING COM 219350105 365,612 10,689 3.01 16,507 19.72 0.2963
2024-08-08 2024-06-30 13F CORNING COMMON STOCK 219350105 354,923 -4,715 -1.31 13,789 16.32 0.5288
2024-05-15 2024-03-31 13F CORNING COMMON STOCK 219350105 359,638 -11,760 -3.17 11,854 4.75 0.4548
2023-11-15 2023-09-30 13F CORNING COMMON STOCK 219350105 371,398 -1,452 -0.39 11,317 86,946.15 0.4980
2023-08-11 2023-06-30 13F CORNING COMMON STOCK 219350105 372,850 -4,773 -1.26 13 0.00 0.5445
2023-05-15 2023-03-31 13F CORNING COMMON STOCK 219350105 377,623 -67 -0.02 13 8.33 0.5887
2023-02-13 2022-12-31 13F CORNING COMMON STOCK 219350105 377,690 -1,584 -0.42 12 -99.89 0.5479
2022-11-14 2022-09-30 13F CORNING COMMON STOCK 219350105 379,274 -18,775 -4.72 11,006 -12.25 0.5375
2022-08-11 2022-06-30 13F CORNING COMMON STOCK 219350105 398,049 -11,545 -2.82 12,542 -17.04 0.5770
2022-05-16 2022-03-31 13F CORNING COMMON STOCK 219350105 409,594 -6,881 -1.65 15,118 -2.50 0.5903
2022-02-10 2021-12-31 13F CORNING COMMON STOCK 219350105 416,475 2,979 0.72 15,506 2.77 0.5576
2021-10-26 2021-09-30 13F CORNING COMMON STOCK 219350105 413,496 251 0.06 15,088 -10.73 0.5827
2021-07-29 2021-06-30 13F CORNING COMMON STOCK 219350105 413,245 -4,601 -1.10 16,902 -7.03 0.6448
2021-04-23 2021-03-31 13F CORNING COMMON STOCK 219350105 417,846 -8,040 -1.89 18,180 18.58 0.7261
2021-02-11 2020-12-31 13F CORNING COMMON STOCK 219350105 425,886 -45,890 -9.73 15,332 0.27 0.6443
2020-11-12 2020-09-30 13F CORNING COMMON STOCK 219350105 471,776 -24,889 -5.01 15,291 18.88 0.7087
2020-08-13 2020-06-30 13F CORNING COMMON STOCK 219350105 496,665 -99,074 -16.63 12,863 5.12 0.6324
2020-05-08 2020-03-31 13F CORNING COMMON STOCK 219350105 595,739 989 0.17 12,236 -29.32 0.7193
2020-02-11 2019-12-31 13F CORNING COMMON STOCK 219350105 594,750 12,875 2.21 17,313 4.33 0.8782
2019-10-24 2019-09-30 13F CORNING COMMON STOCK 219350105 581,875 11,378 1.99 16,595 -12.46 0.9056
2019-08-15 2019-06-30 13F CORNING COMMON STOCK 219350105 570,497 2,243 0.39 18,958 0.79 1.0258
2019-05-15 2019-03-31 13F CORNING COMMON STOCK 219350105 568,254 -8,232 -1.43 18,809 8.00 1.0243
2019-08-28 2018-12-31 13F/A-1 CORNING COMMON STOCK 219350105 576,486 -3,318 -0.57 17,416 -14.91 1.0571
2019-02-15 2018-12-31 13F CORNING COMMON STOCK 219350105 576,486 -3,318 17,415
2019-08-28 2018-09-30 13F/A-1 CORNING COMMON STOCK 219350105 579,804 -7,191 -1.23 20,468 26.75 1.0775
2018-11-15 2018-09-30 13F CORNING COMMON STOCK 219350105 579,804 -7,191 20,467 1.0803
2019-08-27 2018-06-30 13F/A-1 CORNING COMMON STOCK 219350105 586,995 107 0.02 16,148 -1.31 0.9006
2018-08-14 2018-06-30 13F CORNING COMMON STOCK 219350105 586,995 107 16,149
2019-08-27 2018-03-31 13F/A-1 CORNING COMMON STOCK 219350105 586,888 937 0.16 16,362 -12.71 0.9359
2018-05-15 2018-03-31 13F CORNING COMMON STOCK 219350105 586,888 937 16,362
2019-08-27 2017-12-31 13F/A-1 CORNING COMMON STOCK 219350105 585,951 -2,502 -0.43 18,745 6.47 1.0233
2018-02-15 2017-12-31 13F CORNING COMMON STOCK 219350105 585,951 -2,502 18,745 1.0263
2019-08-27 2017-09-30 13F/A-1 CORNING COMMON STOCK 219350105 588,453 23,634 4.18 17,606 3.73 1.0076
2017-11-14 2017-09-30 13F CORNING COMMON STOCK 219350105 589,569 24,750 17,639 1.0017
2017-08-11 2017-06-30 13F CORNING COMMON STOCK 219350105 564,819 -9,821 -1.71 16,973 9.40 1.0096
2017-05-12 2017-03-31 13F CORNING COMMON STOCK 219350105 574,640 -14,662 -2.49 15,515 8.47 0.9388
2017-02-03 2016-12-31 13F CORNING COMMON STOCK 219350105 589,302 -13,051 -2.17 14,303 0.40 0.8968
2016-11-10 2016-09-30 13F CORNING COMMON STOCK 219350105 602,353 -326,869 -35.18 14,246 -25.14 0.8972
2016-08-10 2016-06-30 13F CORNING COMMON STOCK 219350105 929,222 -7,521 -0.80 19,030 -2.75 1.2091
2016-05-03 2016-03-31 13F CORNING COMMON STOCK 219350105 936,743 -17,445 -1.83 19,569 12.19 1.2564
2016-02-12 2015-12-31 13F CORNING COMMON STOCK 219350105 954,188 -17,437 -1.79 17,442 4.86 1.0924
2015-11-09 2015-09-30 13F CORNING COMMON STOCK 219350105 971,625 -15,896 -1.61 16,634 -14.63 1.0650
2015-08-25 2015-06-30 13F CORNING COMMON STOCK 219350105 987,521 -36,963 -3.61 19,484 -16.14 1.1319
2015-05-12 2015-03-31 13F CORNING COMMON STOCK 219350105 1,024,484 -74,131 -6.75 23,235 -7.76 1.3217
2015-02-17 2014-12-31 13F CORNING COMMON STOCK 219350105 1,098,615 -44,246 -3.87 25,191 13.97 1.4138
2014-11-14 2014-09-30 13F CORNING COMMON 219350105 1,142,861 -29,218 -2.49 22,103 -14.09 1.2536
2014-08-07 2014-06-30 13F CORNING COMMON 219350105 1,172,079 -151,095 -11.42 25,727 -6.61 1.4184
2014-05-13 2014-03-31 13F CORNING COMMON 219350105 1,323,174 18,917 1.45 27,549 18.54 1.5418
2014-02-14 2013-12-31 13F CORNING COMMON 219350105 1,304,257 51,130 4.08 23,241 27.12 1.3079
2013-11-06 2013-09-30 13F CORNING COMMON 219350105 1,253,127 6,142 0.49 18,283 3.03 1.1268
2013-08-09 2013-06-30 13F CORNING COMMON 219350105 1,246,985 -22,819 -1.80 17,745 4.83 1.1473
2013-05-20 2013-03-31 13F CORNING COMMON STOCK 219350105 1,269,804 1,269,804 16,927 1.0921
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.