Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionMitchell Sinkler & Starr/pa
Latest Disclosed Ownership3,235 shares
Latest Disclosed Value $ 439,863
Mitchell Sinkler & Starr/pa reports 13.15% decrease in ownership of GLW / Corning Incorporated

On April 13, 2026 - Mitchell Sinkler & Starr/pa filed a 13F-HR form disclosing ownership of 3,235 shares of Corning Incorporated (MX:GLW) valued at $439,863 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 3,725 shares of Corning Incorporated. This represents a change in shares of -13.15% 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)
2026-04-13 2026-03-31 13F CORNING COM 219350105 3,235 -490 -13.15 440 34.66 0.2031
2026-02-11 2025-12-31 13F CORNING COM 219350105 3,725 -475 -11.31 326 -5.23 0.1474
2025-11-04 2025-09-30 13F CORNING COM 219350105 4,200 -300 -6.67 345 45.76 0.1549
2025-07-25 2025-06-30 13F CORNING COM 219350105 4,500 -1,590 -26.11 237 -15.11 0.1133
2025-05-07 2025-03-31 13F CORNING COM 219350105 6,090 -410 -6.31 279 -9.74 0.0780
2025-02-12 2024-12-31 13F CORNING COM 219350105 6,500 0 0.00 309 5.12 0.0824
2024-11-13 2024-09-30 13F CORNING COM 219350105 6,500 0 0.00 293 0.34 0.0738
2024-08-07 2024-06-30 13F CORNING COM 219350105 6,500 -9,250 -58.73 292 -43.74 0.0751
2024-04-30 2024-03-31 13F CORNING COM 219350105 15,750 4,250 36.96 519 48.29 0.1298
2024-02-12 2023-12-31 13F CORNING COM 219350105 11,500 -2,000 -14.81 350 -14.84 0.0637
2023-11-01 2023-09-30 13F CORNING COM 219350105 13,500 4,000 42.11 411 23.80 0.1265
2023-07-18 2023-06-30 13F CORNING COM 219350105 9,500 0 0.00 333 -0.90 0.0945
2023-05-15 2023-03-31 13F CORNING COM 219350105 9,500 -7,350 -43.62 335 -37.73 0.0991
2023-02-14 2022-12-31 13F CORNING COM 219350105 16,850 16,850 538 0.1732
2022-07-21 2022-06-30 13F CORNING COM 219350105 0 -5,600 -100.00 0 -100.00
2022-04-19 2022-03-31 13F CORNING COM 219350105 5,600 0 0.00 207 -0.48 0.0648
2022-02-01 2021-12-31 13F CORNING COM 219350105 5,600 0 0.00 208 1.96 0.0617
2021-10-12 2021-09-30 13F CORNING COM 219350105 5,600 0 0.00 204 -10.92 0.1844
2021-07-15 2021-06-30 13F CORNING COM 219350105 5,600 -400 -6.67 229 -12.26 0.2083
2021-04-12 2021-03-31 13F CORNING COM 219350105 6,000 0 0.00 261 20.83 0.2530
2021-02-09 2020-12-31 13F CORNING COM 219350105 6,000 6,000 216 0.2062
2019-04-08 2019-03-31 13F CORNING COM 219350105 0 -9,000 -100.00 0 -100.00
2019-01-24 2018-12-31 13F CORNING COM 219350105 9,000 0 0.00 272 -14.47 0.3357
2018-10-04 2018-09-30 13F CORNING COM 219350105 9,000 -2,500 -21.74 318 0.63 0.3327
2018-07-11 2018-06-30 13F CORNING COM 219350105 11,500 0 0.00 316 -1.56 0.3483
2018-04-13 2018-03-31 13F CORNING COM 219350105 11,500 -2,000 -14.81 321 -25.69 0.3663
2018-01-11 2017-12-31 13F CORNING COM 219350105 13,500 0 0.00 432 6.93 0.6396
2017-10-23 2017-09-30 13F CORNING COM 219350105 13,500 0 0.00 404 -0.49 0.6332
2017-07-19 2017-06-30 13F CORNING COM 219350105 13,500 -1,000 -6.90 406 3.57 0.6651
2017-04-19 2017-03-31 13F CORNING COM 219350105 14,500 -6,000 -29.27 392 -21.29 0.6367
2017-01-11 2016-12-31 13F CORNING COM 219350105 20,500 1,000 5.13 498 8.03 0.6983
2016-10-11 2016-09-30 13F CORNING COM 219350105 19,500 0 0.00 461 15.54 0.7224
2016-07-12 2016-06-30 13F CORNING COMMON STOCK 219350105 19,500 -3,000 -13.33 399 -15.11 0.5440
2016-04-15 2016-03-31 13F CORNING COMMON STOCK 219350105 22,500 0 0.00 470 14.36 0.6482
2016-01-11 2015-12-31 13F CORNING COMMON STOCK 219350105 22,500 -12,000 -34.78 411 -30.46 0.5609
2015-10-13 2015-09-30 13F CORNING COMMON STOCK 219350105 34,500 0 0.00 591 -13.22 0.7610
2015-07-17 2015-06-30 13F CORNING COMMON STOCK 219350105 34,500 0 0.00 681 -12.92 0.8046
2015-04-14 2015-03-31 13F CORNING COMMON STOCK 219350105 34,500 34,500 0.00 782 0.8798
2015-02-03 2014-12-31 13F CORNING COMMON STOCK 219350105 0 -34,500 -100.00 0 -100.00
2014-10-17 2014-09-30 13F CORNING COMMON STOCK 219350105 34,500 -4,000 -10.39 667 -21.07 0.7451
2014-07-14 2014-06-30 13F CORNING COMMON STOCK 219350105 38,500 0 0.00 845 5.36 0.9080
2014-04-09 2014-03-31 13F CORNING COMMON STOCK 219350105 38,500 2,000 5.48 802 23.38 0.8974
2014-01-23 2013-12-31 13F CORNING COMMON STOCK 219350105 36,500 0 0.00 650 21.95 0.7306
2013-10-22 2013-09-30 13F CORNING COMMON STOCK 219350105 36,500 -3,650 -9.09 533 -6.65 0.6104
2013-07-24 2013-06-30 13F CORNING COMMON STOCK 219350105 40,150 40,150 571 0.1252
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.