Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionSpears Abacus Advisors LLC
Latest Disclosed Ownership72,767 shares
Latest Disclosed Value $ 9,894,129
Spears Abacus Advisors LLC reports 17.77% decrease in ownership of GLW / Corning Incorporated

On May 15, 2026 - Spears Abacus Advisors LLC filed a 13F-HR/A form disclosing ownership of 72,767 shares of Corning Incorporated (MX:GLW) valued at $9,894,129 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 88,487 shares of Corning Incorporated. This represents a change in shares of -17.77% 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)
2026-05-15 2026-03-31 13F/A-1 CORNING COM 219350105 72,767 -15,720 -17.77 9,894 27.71 0.1940
2026-05-14 2026-03-31 13F CORNING COM 219350105 72,767 -15,720 9,894 0.1960
2026-02-17 2025-12-31 13F CORNING COM 219350105 88,487 0 0.00 7,748 6.74 0.1450
2025-11-14 2025-09-30 13F CORNING COM 219350105 88,487 -20,321 -18.68 7,259 26.84 0.1369
2025-08-14 2025-06-30 13F CORNING COM 219350105 108,808 -1,600 -1.45 5,722 13.22 0.1156
2025-05-14 2025-03-31 13F CORNING COM 219350105 110,408 -1,354 -1.21 5,054 -4.82 0.1088
2025-02-12 2024-12-31 13F CORNING COM 219350105 111,762 -30,452 -21.41 5,311 -17.29 0.1091
2024-11-12 2024-09-30 13F CORNING COM 219350105 142,214 -15,873 -10.04 6,421 4.54 0.1264
2024-08-12 2024-06-30 13F CORNING COM 219350105 158,087 -6,705 -4.07 6,142 13.07 0.1274
2024-05-10 2024-03-31 13F CORNING COM 219350105 164,792 164,792 5,432 0.1123
2023-11-21 2023-09-30 13F CORNING COM 219350105 0 -15,369 -100.00 0 -100.00
2023-08-14 2023-06-30 13F CORNING COM 219350105 15,369 0 0.00 539 -0.74 0.0439
2023-05-15 2023-03-31 13F CORNING COM 219350105 15,369 0 0.00 542 10.61 0.0485
2023-02-13 2022-12-31 13F CORNING COM 219350105 15,369 0 0.00 491 9.87 0.0468
2022-11-14 2022-09-30 13F CORNING COM 219350105 15,369 0 0.00 446 -7.85 0.0440
2022-08-08 2022-06-30 13F CORNING COM 219350105 15,369 0 0.00 484 -14.64 0.0436
2022-05-13 2022-03-31 13F CORNING COM 219350105 15,369 0 0.00 567 -0.87 0.0421
2022-02-14 2021-12-31 13F CORNING COM 219350105 15,369 0 0.00 572 1.96 0.0386
2021-11-15 2021-09-30 13F CORNING COM 219350105 15,369 0 0.00 561 -10.81 0.0406
2021-08-09 2021-06-30 13F CORNING COM 219350105 15,369 0 0.00 629 -5.98 0.0452
2021-05-14 2021-03-31 13F CORNING COM 219350105 15,369 0 0.00 669 20.98 0.0517
2021-02-12 2020-12-31 13F CORNING COM 219350105 15,369 0 0.00 553 11.04 0.0462
2020-11-16 2020-09-30 13F CORNING COM 219350105 15,369 0 0.00 498 25.13 0.0474
2020-08-12 2020-06-30 13F CORNING COM 219350105 15,369 0 0.00 398 25.95 0.0419
2020-05-15 2020-03-31 13F CORNING COM 219350105 15,369 158 1.04 316 -28.67 0.0387
2020-02-14 2019-12-31 13F CORNING COM 219350105 15,211 0 0.00 443 2.07 0.0474
2019-11-14 2019-09-30 13F CORNING COM 219350105 15,211 0 0.00 434 -14.06 0.0503
2019-08-09 2019-06-30 13F CORNING COM 219350105 15,211 0 0.00 505 0.40 0.0593
2019-05-14 2019-03-31 13F CORNING COM 219350105 15,211 0 0.00 503 9.35 0.0642
2019-02-13 2018-12-31 13F CORNING COM 219350105 15,211 0 0.00 460 -14.34 0.0675
2018-11-13 2018-09-30 13F CORNING COM 219350105 15,211 0 0.00 537 28.47 0.0642
2018-08-10 2018-06-30 13F CORNING COM 219350105 15,211 0 0.00 418 -1.42 0.0543
2018-05-15 2018-03-31 13F CORNING COM 219350105 15,211 0 0.00 424 -12.94 0.0552
2018-02-14 2017-12-31 13F CORNING COM 219350105 15,211 15,211 487 0.0593
2015-11-13 2015-09-30 13F CORNING COM 219350105 0 -24,819 -100.00 0 -100.00
2015-08-14 2015-06-30 13F CORNING COM 219350105 24,819 24,819 490 0.0542
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.