Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionBallentine Partners, LLC
Latest Disclosed Ownership32,161 shares
Latest Disclosed Value $ 4,372,930
Ballentine Partners, LLC reports 12.66% increase in ownership of GLW / Corning Incorporated

On May 14, 2026 - Ballentine Partners, LLC filed a 13F-HR form disclosing ownership of 32,161 shares of Corning Incorporated (MX:GLW) valued at $4,372,930 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 28,548 shares of Corning Incorporated. This represents a change in shares of 12.66% 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)
2026-05-14 2026-03-31 13F CORNING COM 219350105 32,161 3,613 12.66 4,373 74.95 0.0427
2026-02-03 2025-12-31 13F CORNING COM 219350105 28,548 -116 -0.40 2,500 6.30 0.0351
2025-11-03 2025-09-30 13F CORNING COM 219350105 28,664 -182 -0.63 2,351 54.98 0.0327
2025-07-15 2025-06-30 13F CORNING COM 219350105 28,846 1,841 6.82 1,517 22.73 0.0229
2025-05-01 2025-03-31 13F CORNING COM 219350105 27,005 412 1.55 1,236 -2.14 0.0214
2025-01-16 2024-12-31 13F CORNING COM 219350105 26,593 552 2.12 1,264 7.49 0.0217
2024-10-23 2024-09-30 13F CORNING COM 219350105 26,041 836 3.32 1,176 20.02 0.0201
2024-08-06 2024-06-30 13F CORNING COM 219350105 25,205 490 1.98 979 20.27 0.0181
2024-04-11 2024-03-31 13F CORNING COM 219350105 24,715 -249 -1.00 815 7.11 0.0155
2024-01-23 2023-12-31 13F CORNING COM 219350105 24,964 978 4.08 760 4.11 0.0155
2023-10-19 2023-09-30 13F CORNING COM 219350105 23,986 -218 -0.90 731 -13.92 0.0172
2023-07-26 2023-06-30 13F CORNING COM 219350105 24,204 275 1.15 848 0.47 0.0195
2023-04-27 2023-03-31 13F CORNING COM 219350105 23,929 304 1.29 844 11.94 0.0212
2023-01-27 2022-12-31 13F CORNING COM 219350105 23,625 8 0.03 755 10.07 0.0224
2022-10-26 2022-09-30 13F CORNING COM 219350105 23,617 976 4.31 685 -4.06 0.0237
2022-08-09 2022-06-30 13F CORNING COM 219350105 22,641 284 1.27 714 -14.29 0.0252
2022-02-14 2021-12-31 13F CORNING COM 219350105 22,357 0 0.00 833 2.08 0.0249
2021-10-27 2021-09-30 13F CORNING COM 219350105 22,357 -103 -0.46 816 -11.11 0.0277
2021-08-12 2021-06-30 13F CORNING COM 219350105 22,460 -284 -1.25 918 -7.18 0.0317
2021-05-11 2021-03-31 13F CORNING COM 219350105 22,744 -4,565 -16.72 989 0.61 0.0367
2021-01-25 2020-12-31 13F CORNING COM 219350105 27,309 3,700 15.67 983 28.50 0.0389
2020-10-22 2020-09-30 13F CORNING COM 219350105 23,609 -120 -0.51 765 24.59 0.0338
2020-07-31 2020-06-30 13F CORNING COM 219350105 23,729 -84 -0.35 614 25.56 0.0294
2020-04-23 2020-03-31 13F CORNING COM 219350105 23,813 -492 -2.02 489 -30.93 0.0285
2020-01-22 2019-12-31 13F CORNING COM 219350105 24,305 172 0.71 708 2.91 0.0321
2019-10-21 2019-09-30 13F CORNING COM 219350105 24,133 -149 -0.61 688 -14.75 0.0323
2019-07-25 2019-06-30 13F CORNING COM 219350105 24,282 2,042 9.18 807 9.65 0.0387
2019-05-09 2019-03-31 13F CORNING COM 219350105 22,240 78 0.35 736 9.85 0.0383
2019-02-04 2018-12-31 13F CORNING COM 219350105 22,162 22,162 670 0.0386
2017-11-06 2017-09-30 13F CORNING COM 219350105 0 -7,122 -100.00 0 -100.00
2017-08-03 2017-06-30 13F CORNING COM 219350105 7,122 7,122 225 0.0164
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.