Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionKlingenstein Fields & Co Lp
Latest Disclosed Ownership2,060 shares
Latest Disclosed Value $ 280,098
Klingenstein Fields & Co Lp ownership in GLW / Corning Incorporated

On May 12, 2026 - Klingenstein Fields & Co Lp filed a 13F-HR form disclosing ownership of 2,060 shares of Corning Incorporated (MX:GLW) valued at $280,098 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 14, 2025 disclosing 0 shares of Corning Incorporated.

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)
2026-05-12 2026-03-31 13F CORNING COMMON 219350105 2,060 2,060 280 0.0082
2025-11-14 2025-09-30 13F CORNING COM 219350105 0 -16,006 -100.00 0 -100.00
2025-07-30 2025-06-30 13F CORNING COM 219350105 16,006 0 0.00 842 14.89 0.0333
2025-04-28 2025-03-31 13F CORNING COM 219350105 16,006 60 0.38 733 -3.30 0.0312
2025-01-30 2024-12-31 13F CORNING COM 219350105 15,946 0 0.00 758 5.29 0.0305
2024-10-29 2024-09-30 13F CORNING COM 219350105 15,946 0 0.00 720 16.16 0.0286
2024-08-01 2024-06-30 13F CORNING COM 219350105 15,946 0 0.00 620 17.90 0.0257
2024-04-29 2024-03-31 13F CORNING COM 219350105 15,946 0 0.00 526 8.25 0.0218
2024-02-01 2023-12-31 13F CORNING COM 219350105 15,946 0 0.00 486 0.00 0.0216
2023-10-27 2023-09-30 13F CORNING COM 219350105 15,946 0 0.00 486 -13.08 0.0237
2023-08-01 2023-06-30 13F CORNING COM 219350105 15,946 0 0.00 559 -0.71 0.0258
2023-04-28 2023-03-31 13F CORNING COM 219350105 15,946 0 0.00 563 10.41 0.0282
2023-02-02 2022-12-31 13F CORNING COM 219350105 15,946 -58 -0.36 509 9.70 0.0264
2022-10-28 2022-09-30 13F CORNING COM 219350105 16,004 58 0.36 464 -7.57 0.0255
2022-08-01 2022-06-30 13F CORNING COM 219350105 15,946 0 0.00 502 -14.77 0.0261
2022-04-27 2022-03-31 13F CORNING COM 219350105 15,946 -1,000 -5.90 589 -6.66 0.0252
2022-01-31 2021-12-31 13F CORNING COM 219350105 16,946 -584 -3.33 631 -1.25 0.0254
2021-10-26 2021-09-30 13F CORNING COM 219350105 17,530 0 0.00 639 -10.88 0.0273
2021-07-26 2021-06-30 13F CORNING COM 219350105 17,530 0 0.00 717 -6.03 0.0297
2021-04-29 2021-03-31 13F CORNING COM 219350105 17,530 -416 -2.32 763 18.11 0.0345
2021-02-02 2020-12-31 13F CORNING COM 219350105 17,946 0 0.00 646 11.00 0.0293
2020-10-30 2020-09-30 13F CORNING COM 219350105 17,946 1,515 9.22 582 36.62 0.0291
2020-08-03 2020-06-30 13F CORNING COM 219350105 16,431 0 0.00 426 26.41 0.0233
2020-05-07 2020-03-31 13F CORNING COM 219350105 16,431 0 0.00 337 -29.50 0.0220
2020-02-04 2019-12-31 13F CORNING COM 219350105 16,431 425 2.66 478 4.82 0.0240
2019-11-01 2019-09-30 13F CORNING COM 219350105 16,006 0 0.00 456 -14.29 0.0241
2019-08-12 2019-06-30 13F CORNING COM 219350105 16,006 0 0.00 532 0.38 0.0276
2019-04-29 2019-03-31 13F CORNING COM 219350105 16,006 0 0.00 530 9.50 0.0285
2019-01-22 2018-12-31 13F Corning COM 219350105 16,006 0 0.00 484 -14.34 0.0205
2018-11-01 2018-09-30 13F Corning COM 219350105 16,006 0 0.00 565 28.41 0.0202
2018-07-26 2018-06-30 13F Corning COM 219350105 16,006 0 0.00 440 -1.35 0.0168
2018-05-01 2018-03-31 13F Corning COM 219350105 16,006 -500 -3.03 446 -15.53 0.0171
2018-01-30 2017-12-31 13F Corning COM 219350105 16,506 0 0.00 528 6.88 0.0194
2017-11-01 2017-09-30 13F Corning COM 219350105 16,506 0 0.00 494 -0.40 0.0190
2017-07-27 2017-06-30 13F Corning COM 219350105 16,506 0 0.00 496 11.21 0.0194
2017-05-01 2017-03-31 13F Corning COM 219350105 16,506 0 0.00 446 11.22 0.0181
2017-01-26 2016-12-31 13F Corning COM 219350105 16,506 0 0.00 401 2.82 0.0175
2016-11-02 2016-09-30 13F Corning COM 219350105 16,506 0 0.00 390 15.38 0.0179
2016-08-01 2016-06-30 13F Corning COM 219350105 16,506 -1,500 -8.33 338 -10.11 0.0158
2016-05-02 2016-03-31 13F Corning COM 219350105 18,006 500 2.86 376 17.50 0.0188
2016-02-01 2015-12-31 13F Corning COM 219350105 17,506 1,000 6.06 320 13.07 0.0159
2015-10-23 2015-09-30 13F Corning COM 219350105 16,506 0 0.00 283 -13.19 0.0140
2015-08-03 2015-06-30 13F Corning COM 219350105 16,506 0 0.00 326 -12.83 0.0146
2015-05-05 2015-03-31 13F Corning COM 219350105 16,506 16,506 0.00 374 0.0166
2015-02-04 2014-12-31 13F Corning COM 219350105 0 -16,506 -100.00 0 -100.00
2014-10-21 2014-09-30 13F Corning COM 219350105 16,506 0 0.00 319 -11.88 0.0139
2014-07-24 2014-06-30 13F Corning COM 219350105 16,506 0 0.00 362 5.23 0.0154
2014-05-02 2014-03-31 13F Corning COM 219350105 16,506 0 0.00 344 17.01 0.0154
2014-02-05 2013-12-31 13F Corning COM 219350105 16,506 1,500 10.00 294 34.25 0.0105
2013-11-04 2013-09-30 13F Corning COM 219350105 15,006 0 0.00 219 2.34 0.0086
2013-08-08 2013-06-30 13F Corning COM 219350105 15,006 15,006 214 0.0077
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.