Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership8,754 shares
Latest Disclosed Value $ 1,190,343
Flagship Harbor Advisors, Llc reports 1.11% increase in ownership of GLW / Corning Incorporated

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 8,754 shares of Corning Incorporated (MX:GLW) valued at $1,190,343 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 8,658 shares of Corning Incorporated. This represents a change in shares of 1.11% 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)
2026-04-28 2026-03-31 13F CORNING COM 219350105 8,754 96 1.11 1,190 56.99 0.0523
2026-01-21 2025-12-31 13F CORNING Common Stock 219350105 8,658 5 0.06 758 6.91 0.0358
2025-11-05 2025-09-30 13F CORNING COM 219350105 8,653 139 1.63 710 58.61 0.0309
2025-08-04 2025-06-30 13F CORNING COM 219350105 8,514 9 0.11 448 14.91 0.0212
2025-04-22 2025-03-31 13F CORNING COM 219350105 8,505 49 0.58 389 -2.99 0.0205
2025-01-21 2024-12-31 13F CORNING COM 219350105 8,456 1,302 18.20 402 24.15 0.0211
2024-10-21 2024-09-30 13F CORNING COM 219350105 7,154 291 4.24 323 21.43 0.0177
2025-12-02 2024-06-30 13F CORNING COM 219350105 6,863 2 0.03 267 17.70 0.0160
2024-04-16 2024-03-31 13F CORNING COM 219350105 6,861 86 1.27 226 9.71 0.0145
2024-01-10 2023-12-31 13F CORNING COM 219350105 6,775 -721 -9.62 206 -9.65 0.0150
2023-10-17 2023-09-30 13F CORNING COM 219350105 7,496 7 0.09 228 -12.98 0.0190
2023-07-11 2023-06-30 13F CORNING COM 219350105 7,489 -60 -0.79 262 -1.50 0.0217
2023-04-12 2023-03-31 13F CORNING COM 219350105 7,549 -347 -4.39 266 5.56 0.0251
2023-01-13 2022-12-31 13F CORNING COM 219350105 7,896 -661 -7.72 252 1.61 0.0259
2022-10-13 2022-09-30 13F CORNING COM 219350105 8,557 10 0.12 248 -7.81 0.0288
2022-07-13 2022-06-30 13F CORNING COM 219350105 8,547 -390 -4.36 269 -18.48 0.0302
2022-04-13 2022-03-31 13F CORNING COM 219350105 8,937 -159 -1.75 330 -2.65 0.0318
2022-02-17 2021-12-31 13F/A-1 CORNING COM 219350105 9,096 273 3.09 339 -6.09 0.0321
2022-02-10 2021-12-31 13F CORNING COM 219350105 9,096 273 339 0.0321
2021-11-01 2021-09-30 13F CORNING COM 219350105 8,823 0 0.00 361 0.00 0.0388
2021-07-26 2021-06-30 13F CORNING COM 219350105 8,823 205 2.38 361 -3.73 0.0387
2021-05-03 2021-03-31 13F CORNING COM 219350105 8,618 674 8.48 375 31.12 0.0426
2021-02-08 2020-12-31 13F CORNING COM 219350105 7,944 101 1.29 286 12.60 0.0355
2020-10-13 2020-09-30 13F CORNING Common Stock 219350105 7,843 -1,257 -13.81 254 8.09 0.0343
2020-07-31 2020-06-30 13F CORNING Common Stock 219350105 9,100 1,258 16.04 235 45.96 0.0345
2020-05-12 2020-03-31 13F CORNING Common Stock 219350105 7,842 -206 -2.56 161 -31.20 0.0322
2020-02-14 2019-12-31 13F CORNING Common Stock 219350105 8,048 -118 -1.45 234 0.86 0.0410
2019-10-22 2019-09-30 13F CORNING Common Stock 219350105 8,166 -416 -4.85 232 -18.60 0.0455
2019-07-22 2019-06-30 13F CORNING Common Stock 219350105 8,582 322 3.90 285 4.40 0.0591
2019-04-15 2019-03-31 13F CORNING Common Stock 219350105 8,260 -549 -6.23 273 2.63 0.0561
2019-01-26 2018-12-31 13F CORNING COM 219350105 8,809 807 10.08 266 -5.67 0.0646
2018-11-05 2018-09-30 13F CORNING Common Stock 219350105 8,002 -239 -2.90 282 24.78 0.0523
2018-08-14 2018-06-30 13F CORNING Common Stock 219350105 8,241 490 6.32 226 7.62 0.0452
2018-04-23 2018-03-31 13F CORNING COM 219350105 7,751 -631 -7.53 210 -25.53 0.0624
2018-01-24 2017-12-31 13F CORNING COM 219350105 8,382 776 10.20 282 23.14 0.0811
2017-10-23 2017-09-30 13F CORNING COM 219350105 7,606 365 5.04 229 3.62 0.0743
2017-08-09 2017-06-30 13F CORNING COM 219350105 7,241 7,241 221 0.0767
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.