Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionIpswich Investment Management Co., Inc.
Latest Disclosed Ownership6,400 shares
Latest Disclosed Value $ 870,208
Ipswich Investment Management Co., Inc. reports 13.98% decrease in ownership of GLW / Corning Incorporated

On April 10, 2026 - Ipswich Investment Management Co., Inc. filed a 13F-HR form disclosing ownership of 6,400 shares of Corning Incorporated (MX:GLW) valued at $870,208 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 7,440 shares of Corning Incorporated. This represents a change in shares of -13.98% 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)
2026-04-10 2026-03-31 13F CORNING COM 219350105 6,400 -1,040 -13.98 870 33.64 0.2043
2026-01-16 2025-12-31 13F CORNING COM 219350105 7,440 0 0.00 651 6.72 0.1509
2025-10-08 2025-09-30 13F CORNING COM 219350105 7,440 0 0.00 610 56.01 0.1425
2025-07-16 2025-06-30 13F CORNING COM 219350105 7,440 0 0.00 391 15.00 0.0944
2025-04-16 2025-03-31 13F CORNING COM 219350105 7,440 0 0.00 341 -3.68 0.0845
2025-02-03 2024-12-31 13F CORNING COM 219350105 7,440 0 0.00 354 5.37 0.0851
2024-11-06 2024-09-30 13F CORNING COM 219350105 7,440 0 0.00 336 15.92 0.0778
2024-07-16 2024-06-30 13F CORNING COM 219350105 7,440 0 0.00 289 17.96 0.0677
2024-04-19 2024-03-31 13F CORNING COM 219350105 7,440 -200 -2.62 245 5.60 0.0574
2024-01-31 2023-12-31 13F CORNING COM 219350105 7,640 200 2.69 233 2.65 0.0588
2023-11-08 2023-09-30 13F CORNING COM 219350105 7,440 0 0.00 227 -13.08 0.0619
2023-07-27 2023-06-30 13F CORNING COM 219350105 7,440 0 0.00 261 -0.76 0.0686
2023-04-24 2023-03-31 13F CORNING COM 219350105 7,440 0 0.00 262 10.55 0.0717
2023-02-01 2022-12-31 13F CORNING COM 219350105 7,440 0 0.00 238 9.72 0.0680
2022-10-11 2022-09-30 13F CORNING COM 219350105 7,440 -500 -6.30 216 -13.60 0.0688
2022-07-26 2022-06-30 13F CORNING COM 219350105 7,940 0 0.00 250 -14.68 0.0719
2022-04-25 2022-03-31 13F/A-1 CORNING COM 219350105 7,940 500 6.72 293 5.78 0.0728
2022-04-12 2022-03-31 13F CORNING COM 219350105 7,940 500 293 0.0728
2022-01-24 2021-12-31 13F CORNING COM 219350105 7,440 0 0.00 277 2.21 0.0646
2021-10-07 2021-09-30 13F CORNING COM 219350105 7,440 0 0.00 271 -10.86 0.0694
2021-08-05 2021-06-30 13F CORNING INC COM Stock 219350105 7,440 0 0.00 304 -6.17 0.0777
2021-04-09 2021-03-31 13F CORNING COM 219350105 7,440 0 0.00 324 20.90 0.0912
2021-02-05 2020-12-31 13F CORNING COM 219350105 7,440 0 0.00 268 11.20 0.0804
2020-10-06 2020-09-30 13F CORNING COM 219350105 7,440 7,440 241 0.0772
2020-04-09 2020-03-31 13F CORNING COM 219350105 0 -7,440 -100.00 0 -100.00
2020-01-08 2019-12-31 13F CORNING COM 219350105 7,440 0 0.00 217 2.36 0.0638
2019-10-08 2019-09-30 13F CORNING COM 219350105 7,440 0 0.00 212 -14.17 0.0676
2019-07-11 2019-06-30 13F CORNING COM 219350105 7,440 0 0.00 247 0.41 0.0789
2019-04-12 2019-03-31 13F CORNING COM 219350105 7,440 -1,186 -13.75 246 -5.75 0.0804
2019-01-15 2018-12-31 13F CORNING COM 219350105 8,626 0 0.00 261 -14.14 0.0957
2018-10-09 2018-09-30 13F CORNING COM 219350105 8,626 -1,414 -14.08 304 108.22 0.1028
2013-10-25 2013-09-30 13F/A-1 CORNING COM 219350105 10,040 0 0.00 146 2.10 0.0657
2013-10-21 2013-09-30 13F CORNING COM 219350105 10,040 146
2013-07-17 2013-06-30 13F CORNING COM 219350105 10,040 10,040 143 0.0617
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.