Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership59,348 shares
Latest Disclosed Value $ 8,069,693
Vestmark Advisory Solutions, Inc. reports 29.98% decrease in ownership of GLW / Corning Incorporated

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 59,348 shares of Corning Incorporated (MX:GLW) valued at $8,069,693 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 84,753 shares of Corning Incorporated. This represents a change in shares of -29.98% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-15 2026-03-31 13F CORNING COM 219350105 59,348 -25,405 -29.98 8,070 8.73 0.0555
2026-02-06 2025-12-31 13F CORNING COM 219350105 84,753 -3,032 -3.45 7,421 3.07 0.1001
2025-11-10 2025-09-30 13F CORNING COM 219350105 87,785 -570 -0.65 7,201 54.97 0.1373
2025-08-06 2025-06-30 13F CORNING COM 219350105 88,355 -45,321 -33.90 4,647 -24.07 0.0671
2025-05-13 2025-03-31 13F CORNING COM 219350105 133,676 114,330 590.97 6,120 565.83 0.1576
2025-02-06 2024-12-31 13F CORNING COM 219350105 19,346 -161 -0.83 919 4.43 0.0317
2024-11-14 2024-09-30 13F CORNING COM 219350105 19,507 -500 -2.50 881 13.26 0.0328
2024-08-12 2024-06-30 13F CORNING COM 219350105 20,007 -3,617 -15.31 777 -0.13 0.0325
2024-05-15 2024-03-31 13F CORNING COM 219350105 23,624 -4,551 -16.15 779 -9.22 0.0335
2024-02-06 2023-12-31 13F CORNING COM 219350105 28,175 -5,269 -15.75 858 -15.90 0.0436
2023-11-06 2023-09-30 13F CORNING COM 219350105 33,444 -13,169 -28.25 1,019 -37.60 0.0741
2023-08-07 2023-06-30 13F CORNING COM 219350105 46,613 879 1.92 1,633 1.24 0.0622
2023-05-09 2023-03-31 13F CORNING COM 219350105 45,734 1,062 2.38 1,614 13.11 0.0699
2023-01-20 2022-12-31 13F CORNING COM 219350105 44,672 315 0.71 1,427 10.80 0.0695
2022-11-03 2022-09-30 13F CORNING COM 219350105 44,357 13,990 46.07 1,287 34.48 0.0717
2022-08-04 2022-06-30 13F CORNING COM 219350105 30,367 15,824 108.81 957 78.21 0.0547
2022-04-27 2022-03-31 13F CORNING COM 219350105 14,543 514 3.66 537 2.87 0.0304
2022-01-31 2021-12-31 13F CORNING COM 219350105 14,029 -24 -0.17 522 1.75 0.0295
2021-11-15 2021-09-30 13F CORNING COM 219350105 14,053 14,053 513 0.0347
2021-08-09 2021-06-30 13F CORNING COM 219350105 0 -5,159 -100.00 0 -100.00
2021-05-10 2021-03-31 13F CORNING COM 219350105 5,159 -1,314 -20.30 224 -3.86 0.0199
2021-02-04 2020-12-31 13F CORNING COM 219350105 6,473 6,473 233 0.0261
2020-10-19 2020-09-30 13F CORNING COM 219350105 0 -8,408 -100.00 0 -100.00
2020-08-13 2020-06-30 13F CORNING COM 219350105 8,408 8,408 218 0.0337
2020-05-06 2020-03-31 13F CORNING COM 219350105 0 -27,972 -100.00 0 -100.00
2020-02-14 2019-12-31 13F CORNING COM 219350105 27,972 -10,756 -27.77 814 -26.33 0.1670
2019-11-05 2019-09-30 13F CORNING COM 219350105 38,728 6,467 20.05 1,105 3.08 0.1792
2019-08-20 2019-06-30 13F CORNING COM 219350105 32,261 8,284 34.55 1,072 35.01 0.1834
2019-05-14 2019-03-31 13F CORNING COM 219350105 23,977 23,977 794 0.1416
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.