Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionPflug Koory, LLC
Latest Disclosed Ownership27,136 shares
Latest Disclosed Value $ 3,689,682
Pflug Koory, LLC reports 1.33% decrease in ownership of GLW / Corning Incorporated

On April 21, 2026 - Pflug Koory, LLC filed a 13F-HR form disclosing ownership of 27,136 shares of Corning Incorporated (MX:GLW) valued at $3,689,682 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 27,503 shares of Corning Incorporated. This represents a change in shares of -1.33% 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)
2026-04-21 2026-03-31 13F CORNING COM 219350105 27,136 -367 -1.33 3,690 53.20 1.6906
2026-01-20 2025-12-31 13F CORNING COM 219350105 27,503 -3,961 -12.59 2,408 -6.67 1.1236
2025-10-21 2025-09-30 13F CORNING COM 219350105 31,464 -46 -0.15 2,581 55.70 1.2237
2025-07-21 2025-06-30 13F CORNING COM 219350105 31,510 -74 -0.23 1,657 14.67 0.8413
2025-04-17 2025-03-31 13F CORNING COM 219350105 31,584 -160 -0.50 1,446 -4.18 0.8053
2025-01-21 2024-12-31 13F CORNING COM 219350105 31,744 -6,397 -16.77 1,508 -12.43 0.7635
2025-01-15 2024-09-30 13F CORNING COM 219350105 38,141 -150 -0.39 1,722 36.45 0.8465
2024-04-11 2024-03-31 13F CORNING COM 219350105 38,291 16 0.04 1,262 8.33 0.6209
2024-01-11 2023-12-31 13F CORNING COM 219350105 38,275 894 2.39 1,165 2.37 0.6174
2023-10-30 2023-09-30 13F CORNING COM 219350105 37,381 -272 -0.72 1,139 -13.72 0.6586
2023-07-21 2023-06-30 13F CORNING COM 219350105 37,653 50 0.13 1,319 -0.53 0.6722
2023-04-20 2023-03-31 13F CORNING COM 219350105 37,603 -254 -0.67 1,327 132,500.00 0.7211
2023-01-18 2022-12-31 13F CORNING COM 219350105 37,857 -359 -0.94 1 -99.91 0.6722
2022-10-11 2022-09-30 13F CORNING COM 219350105 38,216 372 0.98 1,109 -6.96 0.6750
2022-08-01 2022-06-30 13F CORNING COM 219350105 37,844 1,376 3.77 1,192 -11.44 0.6878
2022-04-14 2022-03-31 13F CORNING COM 219350105 36,468 327 0.90 1,346 0.00 0.6781
2022-01-20 2021-12-31 13F CORNING COM 219350105 36,141 1,345 3.87 1,346 5.98 0.6790
2021-10-19 2021-09-30 13F CORNING COM 219350105 34,796 -1,477 -4.07 1,270 -14.42 0.6944
2021-07-14 2021-06-30 13F CORNING COM 219350105 36,273 1,500 4.31 1,484 -1.92 0.7771
2021-07-13 2021-03-31 13F CORNING COM 219350105 34,773 -2,699 -7.20 1,513 12.16 0.8366
2021-01-14 2020-12-31 13F CORNING COM 219350105 37,472 132 0.35 1,349 11.49 0.7986
2020-10-20 2020-09-30 13F CORNING COM 219350105 37,340 -195 -0.52 1,210 24.49 0.8175
2020-07-30 2020-06-30 13F CORNING COM 219350105 37,535 1,695 4.73 972 32.07 0.7204
2020-04-24 2020-03-31 13F CORNING COM 219350105 35,840 20,640 135.79 736 66.52 0.6542
2020-01-14 2019-12-31 13F CORNING COM 219350105 15,200 4,910 47.72 442 50.85 0.3124
2019-10-15 2019-09-30 13F CORNING COM 219350105 10,290 0 0.00 293 -14.33 0.2224
2019-08-02 2019-06-30 13F CORNING COM 219350105 10,290 -100 -0.96 342 -0.58 0.2620
2019-04-11 2019-03-31 13F CORNING COM 219350105 10,390 -530 -4.85 344 4.24 0.2692
2019-01-24 2018-12-31 13F CORNING COM 219350105 10,920 0 0.00 330 -14.29 0.2817
2018-11-06 2018-09-30 13F CORNING COM 219350105 10,920 0 0.00 385 28.33 0.3114
2018-08-13 2018-06-30 13F CORNING COM 219350105 10,920 0 0.00 300 -1.32 0.2369
2018-08-13 2018-03-31 13F CORNING COM 219350105 10,920 -2,550 -18.93 304 -29.47 0.2507
2018-08-13 2017-12-31 13F CORNING COM 219350105 13,470 0 0.00 431 6.95 0.3409
2018-08-13 2017-09-30 13F CORNING COM 219350105 13,470 0 0.00 403 -0.49 0.3295
2018-08-13 2017-06-30 13F CORNING COM 219350105 13,470 0 0.00 405 11.26 0.3422
2018-08-13 2017-03-31 13F CORNING COM 219350105 13,470 0 0.00 364 11.31 0.3182
2018-08-13 2016-12-31 13F CORNING COM 219350105 13,470 13,470 327 0.2816
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.