Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionCheck Capital Management Inc/ca
Latest Disclosed Ownership5,050 shares
Latest Disclosed Value $ 686,648
Check Capital Management Inc/ca ownership in GLW / Corning Incorporated

On May 4, 2026 - Check Capital Management Inc/ca filed a 13F-HR form disclosing ownership of 5,050 shares of Corning Incorporated (MX:GLW) valued at $686,648 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 5,050 shares of Corning Incorporated. This represents a change in shares of 0.00% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-04 2026-03-31 13F Corning COM 219350105 5,050 0 0.00 687 55.20 0.0040
2026-02-06 2025-12-31 13F Corning COM 219350105 5,050 0 0.00 442 6.76 0.0129
2025-11-06 2025-09-30 13F Corning COM 219350105 5,050 0 0.00 414 56.23 0.0137
2025-07-25 2025-06-30 13F Corning COM 219350105 5,050 0 0.00 266 14.72 0.0090
2025-05-02 2025-03-31 13F Corning COM 219350105 5,050 0 0.00 231 -3.35 0.0067
2025-01-30 2024-12-31 13F Corning COM 219350105 5,050 0 0.00 240 4.82 0.0071
2024-11-06 2024-09-30 13F Corning COM 219350105 5,050 5,050 228 0.0070
2021-11-08 2021-09-30 13F Corning COM 219350105 0 -5,100 -100.00 0 -100.00
2021-08-09 2021-06-30 13F Corning COM 219350105 5,100 0 0.00 209 -5.86 0.0094
2021-05-07 2021-03-31 13F Corning COM 219350105 5,100 5,100 222 0.0108
2019-11-06 2019-09-30 13F Corning COM 219350105 0 -7,650 -100.00 0 -100.00
2019-08-08 2019-06-30 13F Corning COM 219350105 7,650 0 0.00 254 0.40 0.0131
2019-05-06 2019-03-31 13F Corning COM 219350105 7,650 0 0.00 253 9.52 0.0134
2019-02-07 2018-12-31 13F Corning COM 219350105 7,650 -300 -3.77 231 -17.79 0.0124
2018-10-29 2018-09-30 13F Corning COM 219350105 7,950 -249 -3.04 281 24.34 0.0140
2018-07-26 2018-06-30 13F Corning COM 219350105 8,199 -100 -1.20 226 -2.16 0.0120
2018-05-02 2018-03-31 13F Corning COM 219350105 8,299 -450 -5.14 231 -17.50 0.0123
2018-02-07 2017-12-31 13F Corning COM 219350105 8,749 0 0.00 280 6.87 0.0154
2017-11-13 2017-09-30 13F/A-1 Corning COM 219350105 8,749 -274 -3.04 262 -3.32 0.0157
2017-11-08 2017-09-30 13F Corning COM 219350105 17,498 8,475 524
2017-08-10 2017-06-30 13F Corning COM 219350105 9,023 -102 -1.12 271 10.16 0.0173
2017-05-05 2017-03-31 13F Corning COM 219350105 9,125 -2,223 -19.59 246 -10.55 0.0168
2017-01-27 2016-12-31 13F Corning COM 219350105 11,348 -4,741 -29.47 275 -27.82 0.0209
2016-11-09 2016-09-30 13F Corning COM 219350105 16,089 -500 -3.01 381 12.06 0.0298
2016-07-13 2016-06-30 13F Corning COM 219350105 16,589 0 0.00 340 -2.02 0.0277
2016-05-06 2016-03-31 13F Corning COM 219350105 16,589 -1,129 -6.37 347 7.10 0.0296
2016-01-15 2015-12-31 13F Corning COM 219350105 17,718 0 0.00 324 6.93 0.0310
2015-11-12 2015-09-30 13F Corning COM 219350105 17,718 -2,916 -14.13 303 -25.55 0.0296
2015-08-12 2015-06-30 13F Corning COM 219350105 20,634 -956 -4.43 407 -16.94 0.0382
2015-05-01 2015-03-31 13F Corning COM 219350105 21,590 0 0.00 490 -1.01 0.0417
2015-01-23 2014-12-31 13F Corning COM 219350105 21,590 -4,950 -18.65 495 -3.51 0.0436
2014-11-04 2014-09-30 13F Corning COM 219350105 26,540 -3,904 -12.82 513 -23.20 0.0480
2014-07-18 2014-06-30 13F Corning COM 219350105 30,444 0 0.00 668 5.36 0.0659
2014-04-15 2014-03-31 13F Corning COM 219350105 30,444 -2,039 -6.28 634 9.50 0.0652
2014-01-16 2013-12-31 13F Corning COM 219350105 32,483 -191 -0.58 579 21.38 0.0707
2013-10-17 2013-09-30 13F Corning COM 219350105 32,674 -516 -1.55 477 1.06 0.0635
2013-10-17 2013-06-30 13F/A-1 Corning COM 219350105 33,190 900 2.79 472 9.77 0.0656
2013-07-16 2013-06-30 13F Corning COM 219350105 33,190 472
2013-10-17 2013-03-31 13F/A-1 Corning COM 219350105 32,290 4,563 16.46 430 22.86 0.0642
2013-10-17 2012-12-31 13F/A-1 Corning COM 219350105 27,727 2,772 11.11 350 6.71 0.0620
2013-10-17 2012-09-30 13F/A-1 Corning COM 219350105 24,955 24,955 328 0.0666
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.