Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionBoston Private Wealth Llc
Latest Disclosed Ownership2,676 shares
Latest Disclosed Value $ 363,855
Boston Private Wealth Llc reports 13.93% decrease in ownership of GLW / Corning Incorporated

On April 17, 2026 - Boston Private Wealth Llc filed a 13F-HR form disclosing ownership of 2,676 shares of Corning Incorporated (MX:GLW) valued at $363,855 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 3,109 shares of Corning Incorporated. This represents a change in shares of -13.93% 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)
2026-04-17 2026-03-31 13F CORNING COM 219350105 2,676 -433 -13.93 364 33.46 0.0064
2026-02-04 2025-12-31 13F CORNING COM 219350105 3,109 -236 -7.06 272 -0.73 0.0160
2025-11-06 2025-09-30 13F CORNING COM 219350105 3,345 3,345 274 0.0148
2025-05-14 2025-03-31 13F CORNING COM 219350105 0 -7,224 -100.00 0 -100.00
2025-02-05 2024-12-31 13F CORNING COM 219350105 7,224 7,224 343 0.0064
2024-10-18 2024-09-30 13F CORNING COM 219350105 0 -7,756 -100.00 0 -100.00
2024-08-06 2024-06-30 13F CORNING COM 219350105 7,756 -2,723 -25.99 301 -12.75 0.0075
2024-05-15 2024-03-31 13F CORNING COM 219350105 10,479 689 7.04 345 15.77 0.0077
2024-01-30 2023-12-31 13F CORNING COM 219350105 9,790 889 9.99 298 9.96 0.0073
2023-10-23 2023-09-30 13F CORNING COM 219350105 8,901 -2,803 -23.95 271 -33.90 0.0060
2023-07-24 2023-06-30 13F CORNING COM 219350105 11,704 369 3.26 410 2.76 0.0074
2023-05-12 2023-03-31 13F CORNING COM 219350105 11,335 -4,264 -27.34 400 -19.88 0.0056
2023-02-10 2022-12-31 13F Corning COM 219350105 15,599 -1,507 -8.81 498 0.40 0.0067
2022-11-09 2022-09-30 13F Corning COM 219350105 17,106 17,106 496 0.0072
2022-02-15 2021-12-31 13F Corning COM 219350105 0 -7,003 -100.00 0 -100.00
2021-11-09 2021-09-30 13F Corning COM 219350105 7,003 -1,236 -15.00 256 -24.04 0.0033
2021-08-13 2021-06-30 13F Corning COM 219350105 8,239 -322 -3.76 337 -9.41 0.0043
2021-05-11 2021-03-31 13F Corning COM 219350105 8,561 537 6.69 372 28.72 0.0052
2021-02-10 2020-12-31 13F Corning COM 219350105 8,024 927 13.06 289 25.65 0.0042
2020-11-10 2020-09-30 13F Corning COM 219350105 7,097 7,097 230 0.0038
2020-05-11 2020-03-31 13F Corning COM 219350105 0 -13,687 -100.00 0 -100.00
2020-02-13 2019-12-31 13F Corning COM 219350105 13,687 4,015 41.51 398 44.20 0.0072
2019-11-01 2019-09-30 13F Corning COM 219350105 9,672 -1,277 -11.66 276 -24.18 0.0055
2019-07-10 2019-06-30 13F Corning COM 219350105 10,949 -648 -5.59 364 -5.21 0.0122
2019-05-14 2019-03-31 13F Corning COM 219350105 11,597 -2,429 -17.32 384 -9.43 0.0152
2019-02-14 2018-12-31 13F Corning COM 219350105 14,026 -71,419 -83.58 424 -85.95 0.0181
2018-11-13 2018-09-30 13F Corning COM 219350105 85,445 -3,291 -3.71 3,017 23.60 0.1067
2018-08-14 2018-06-30 13F Corning COM 219350105 88,736 -7,145 -7.45 2,441 -8.68 0.0936
2018-05-11 2018-03-31 13F Corning COM 219350105 95,881 -4,442 -4.43 2,673 -16.70 0.1025
2018-02-13 2017-12-31 13F Corning COM 219350105 100,323 1,484 1.50 3,209 8.52 0.1207
2017-11-13 2017-09-30 13F Corning COM 219350105 98,839 5,569 5.97 2,957 5.49 0.1137
2017-08-04 2017-06-30 13F Corning COM 219350105 93,270 10,805 13.10 2,803 25.86 0.1100
2017-05-11 2017-03-31 13F Corning COM 219350105 82,465 4,111 5.25 2,227 17.09 0.0887
2017-02-15 2016-12-31 13F Corning COM 219350105 78,354 17,752 29.29 1,902 32.73 0.0787
2016-11-15 2016-09-30 13F/A-1 Corning COM 219350105 60,602 2,709 4.68 1,433 20.83 0.0583
2016-11-14 2016-09-30 13F Corning COM 219350105 57,893 0 1,186 0.0484
2016-08-01 2016-06-30 13F Corning COM 219350105 57,893 9,363 19.29 1,186 16.96 0.0484
2016-05-13 2016-03-31 13F Corning COM 219350105 48,530 -10,226 -17.40 1,014 -5.59 0.0413
2016-02-12 2015-12-31 13F Corning COM 219350105 58,756 -2,161 -3.55 1,074 2.97 0.0424
2015-11-12 2015-09-30 13F Corning COM 219350105 60,917 -14,500 -19.23 1,043 -29.91 0.0404
2015-08-13 2015-06-30 13F Corning COM 219350105 75,417 75,417 1,488 0.0492
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.