Corning Incorporated
US ˙ NYSE ˙ US2193501051

SecurityGLW / Corning Incorporated
InstitutionSigma Planning Corp
Latest Disclosed Ownership28,231 shares
Latest Disclosed Value $ 3,838,513
Sigma Planning Corp reports 3.53% decrease in ownership of GLW / Corning Incorporated

On May 4, 2026 - Sigma Planning Corp filed a 13F-HR form disclosing ownership of 28,231 shares of Corning Incorporated (US:GLW) valued at $3,838,569 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 29,264 shares of Corning Incorporated. This represents a change in shares of -3.53% during the quarter. The current value of the position is $5,667,656 USD.

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)
2026-05-04 2026-03-31 13F CORNING COM 219350105 28,231 -1,033 -3.53 3,839 49.80 0.1066
2026-01-30 2025-12-31 13F CORNING COM 219350105 29,264 18,226 165.12 2,562 183.09 0.0707
2025-11-10 2025-09-30 13F CORNING COM 219350105 11,038 286 2.66 905 60.18 0.0257
2025-08-05 2025-06-30 13F CORNING COM 219350105 10,752 226 2.15 565 17.46 0.0170
2025-05-02 2025-03-31 13F CORNING COM 219350105 10,526 -2,063 -16.39 482 -19.57 0.0154
2025-02-03 2024-12-31 13F CORNING COM 219350105 12,589 2,037 19.30 598 25.63 0.0188
2024-11-04 2024-09-30 13F CORNING COM 219350105 10,552 594 5.97 476 23.32 0.0146
2024-08-06 2024-06-30 13F CORNING COM 219350105 9,958 1,578 18.83 387 39.86 0.0123
2024-05-02 2024-03-31 13F CORNING COM 219350105 8,380 8,380 276 0.0087
2024-02-01 2023-12-31 13F CORNING COM 219350105 0 -8,415 -100.00 0 -100.00
2023-11-06 2023-09-30 13F CORNING COM 219350105 8,415 -553 -6.17 256 -18.47 0.0096
2023-08-02 2023-06-30 13F CORNING COM 219350105 8,968 -12,945 -59.07 314 -59.38 0.0113
2023-05-08 2023-03-31 13F CORNING COM 219350105 21,913 2,359 12.06 773 23.88 0.0257
2023-01-24 2022-12-31 13F CORNING COM 219350105 19,554 -1,162 -5.61 625 3.83 0.0223
2022-11-10 2022-09-30 13F CORNING COM 219350105 20,716 831 4.18 601 -4.15 0.0229
2022-08-11 2022-06-30 13F CORNING COM 219350105 19,885 152 0.77 627 -13.87 0.0218
2022-04-20 2022-03-31 13F CORNING COM 219350105 19,733 8,390 73.97 728 72.51 0.0218
2022-02-02 2021-12-31 13F CORNING INC COM Stock 219350105 11,343 2,624 30.10 422 32.70 0.0118
2021-10-28 2021-09-30 13F CORNING COM 219350105 8,719 -193 -2.17 318 -12.88 0.0096
2021-08-13 2021-06-30 13F CORNING INC COM Stock 219350105 8,912 -26 -0.29 365 -6.17 0.0109
2021-05-06 2021-03-31 13F CORNING INC COM Stock 219350105 8,938 -19,094 -68.12 389 -61.45 0.0124
2021-02-09 2020-12-31 13F CORNING COM 219350105 28,032 19,788 240.03 1,009 277.90 0.0343
2020-11-03 2020-09-30 13F CORNING COM 219350105 8,244 -4,144 -33.45 267 -16.82 0.0106
2020-07-31 2020-06-30 13F CORNING COM 219350105 12,388 -2,748 -18.16 321 3.22 0.0141
2020-05-01 2020-03-31 13F CORNING COM 219350105 15,136 -27,741 -64.70 311 -75.08 0.0185
2020-02-03 2019-12-31 13F CORNING COM 219350105 42,877 5,789 15.61 1,248 17.96 0.0527
2019-11-01 2019-09-30 13F CORNING COM 219350105 37,088 1,483 4.17 1,058 -10.57 0.0508
2019-08-01 2019-06-30 13F CORNING COM 219350105 35,605 5,131 16.84 1,183 17.24 0.0609
2019-05-01 2019-03-31 13F CORNING COM 219350105 30,474 7,693 33.77 1,009 46.66 0.0573
2019-01-31 2018-12-31 13F CORNING COM 219350105 22,781 5,451 31.45 688 12.42 0.0500
2018-11-07 2018-09-30 13F CORNING COM 219350105 17,330 3,297 23.49 612 58.55 0.0360
2018-08-02 2018-06-30 13F CORNING COM 219350105 14,033 -1,509 -9.71 386 -10.85 0.0258
2018-05-11 2018-03-31 13F CORNING COM 219350105 15,542 1,755 12.73 433 -1.81 0.0317
2018-02-07 2017-12-31 13F CORNING COM 219350105 13,787 580 4.39 441 11.65 0.0340
2017-11-06 2017-09-30 13F CORNING COM 219350105 13,207 265 2.05 395 1.54 0.0326
2017-08-02 2017-06-30 13F CORNING COM 219350105 12,942 276 2.18 389 13.74 0.0366
2017-04-24 2017-03-31 13F CORNING COM 219350105 12,666 1,559 14.04 342 26.67 0.0331
2017-01-23 2016-12-31 13F CORNING COM 219350105 11,107 -2,314 -17.24 270 -14.83 0.0295
2016-11-07 2016-09-30 13F CORNING COM 219350105 13,421 1,958 17.08 317 34.89 0.0376
2016-07-22 2016-06-30 13F CORNING COM 219350105 11,463 -2,107 -15.53 235 -16.96 0.0306
2016-04-18 2016-03-31 13F CORNING COM 219350105 13,570 1,808 15.37 283 31.63 0.0387
2016-01-20 2015-12-31 13F CORNING COM 219350105 11,762 508 4.51 215 11.40 0.0301
2015-11-02 2015-09-30 13F CORNING COM 219350105 11,254 -8,865 -44.06 193 -51.39 0.0306
2015-07-14 2015-06-30 13F CORNING COM 219350105 20,119 -9,934 -33.05 397 -41.79 0.0548
2015-04-23 2015-03-31 13F CORNING COM 219350105 30,053 1,011 3.48 682 2.40 0.0903
2015-02-13 2014-12-31 13F CORNING COM 219350105 29,042 29,042 666 0.0880
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.