Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionSt Germain D J Co Inc
Latest Disclosed Ownership95,920 shares
Latest Disclosed Value $ 13,042,242
St Germain D J Co Inc reports 32.61% decrease in ownership of GLW / Corning Incorporated

On April 13, 2026 - St Germain D J Co Inc filed a 13F-HR form disclosing ownership of 95,920 shares of Corning Incorporated (MX:GLW) valued at $13,042,242 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 142,342 shares of Corning Incorporated. This represents a change in shares of -32.61% 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)
2026-04-13 2026-03-31 13F CORNING INC COM Stock 219350105 95,920 -46,422 -32.61 13,042 4.65 0.5162
2026-01-29 2025-12-31 13F CORNING INC COM Stock 219350105 142,342 -4,308 -2.94 12,463 3.61 0.4840
2025-10-07 2025-09-30 13F CORNING INC COM Stock 219350105 146,650 -23,840 -13.98 12,030 34.16 0.4813
2025-07-16 2025-06-30 13F CORNING INC COM Stock 219350105 170,490 4,702 2.84 8,966 18.14 0.3866
2025-04-09 2025-03-31 13F CORNING INC COM Stock 219350105 165,788 1,429 0.87 7,590 -2.83 0.3567
2025-01-10 2024-12-31 13F CORNING INC COM Stock 219350105 164,359 -2,290 -1.37 7,810 3.80 0.3550
2024-10-18 2024-09-30 13F CORNING INC COM Stock 219350105 166,649 -3,179 -1.87 7,524 14.05 0.3458
2024-07-08 2024-06-30 13F CORNING INC COM Stock 219350105 169,828 -2,921 -1.69 6,598 15.88 0.3193
2024-04-02 2024-03-31 13F CORNING INC COM Stock 219350105 172,749 -1,853 -1.06 5,694 7.09 0.2783
2024-01-02 2023-12-31 13F CORNING INC COM Stock 219350105 174,602 4,710 2.77 5,317 2.70 0.2769
2023-10-23 2023-09-30 13F CORNING INC COM Stock 219350105 169,892 -2,044 -1.19 5,177 -14.08 0.2909
2023-09-07 2023-06-30 13F CORNING INC COM Stock 219350105 171,936 -30,867 -15.22 6,025 594.81 0.3182
2023-02-27 2022-12-31 13F CORNING INC COM Stock 219350105 202,803 30,199 17.50 868 -84.06 0.2917
2022-11-21 2022-09-30 13F Corning COM 219350105 172,604 0 0.00 5,439 0.00 0.3592
2022-08-15 2022-06-30 13F/A-1 Corning COM 219350105 172,604 600 0.35 5,439 -14.33 0.3592
2022-08-12 2022-06-30 13F Corning COM 219350105 172,004 0 6,349 0.3571
2022-05-12 2022-03-31 13F Corning COM 219350105 172,004 744 0.43 6,349 -0.42 0.3571
2022-02-11 2021-12-31 13F Corning COM 219350105 171,260 1,204 0.71 6,376 2.76 0.3506
2021-11-03 2021-09-30 13F Corning COM 219350105 170,056 -4,165 -2.39 6,205 -12.92 0.3821
2021-07-28 2021-06-30 13F Corning COM 219350105 174,221 -2,630 -1.49 7,126 -7.39 0.4472
2021-05-13 2021-03-31 13F Corning COM 219350105 176,851 -1,650 -0.92 7,695 19.75 0.5202
2021-02-04 2020-12-31 13F Corning COM 219350105 178,501 -1,335 -0.74 6,426 10.26 0.4587
2020-11-10 2020-09-30 13F Corning COM 219350105 179,836 -1,995 -1.10 5,828 23.76 0.4729
2020-08-13 2020-06-30 13F Corning COM 219350105 181,831 29,925 19.70 4,709 50.93 0.4123
2020-05-13 2020-03-31 13F Corning COM 219350105 151,906 3,365 2.27 3,120 -27.84 0.3067
2020-02-14 2019-12-31 13F Corning COM 219350105 148,541 26,128 21.34 4,324 23.86 0.3630
2019-10-17 2019-09-30 13F Corning COM 219350105 122,413 -860 -0.70 3,491 -14.77 0.3755
2019-07-24 2019-06-30 13F Corning COM 219350105 123,273 -3,675 -2.89 4,096 -2.52 0.4464
2019-05-02 2019-03-31 13F Corning COM 219350105 126,948 -2,255 -1.75 4,202 7.66 0.4576
2019-02-05 2018-12-31 13F Corning COM 219350105 129,203 -1,340 -1.03 3,903 -15.30 0.4631
2018-10-23 2018-09-30 13F Corning COM 219350105 130,543 -4,785 -3.54 4,608 23.77 0.5158
2018-08-07 2018-06-30 13F Corning COM 219350105 135,328 1,745 1.31 3,723 -0.03 0.4431
2018-04-20 2018-03-31 13F Corning COM 219350105 133,583 -24,990 -15.76 3,724 -26.59 0.4701
2018-02-13 2017-12-31 13F Corning COM 219350105 158,573 -2,610 -1.62 5,073 5.18 0.6059
2017-10-31 2017-09-30 13F Corning COM 219350105 161,183 -1,230 -0.76 4,823 -1.19 0.6044
2017-07-28 2017-06-30 13F Corning COM 219350105 162,413 570 0.35 4,881 11.69 0.6532
2017-04-25 2017-03-31 13F Corning COM 219350105 161,843 -30,790 -15.98 4,370 -6.52 0.6085
2017-02-02 2016-12-31 13F Corning COM 219350105 192,633 -295 -0.15 4,675 2.45 0.6325
2016-10-27 2016-09-30 13F Corning COM 219350105 192,928 -785 -0.41 4,563 15.02 0.6371
2016-08-22 2016-06-30 13F Corning COM 219350105 193,713 1,755 0.91 3,967 -1.07 0.5543
2016-04-21 2016-03-31 13F Corning COM 219350105 191,958 2,715 1.43 4,010 15.93 0.5732
2016-01-19 2015-12-31 13F Corning COM 219350105 189,243 635 0.34 3,459 7.12 0.5205
2015-10-23 2015-09-30 13F Corning COM 219350105 188,608 8,965 4.99 3,229 -8.89 0.5412
2015-07-23 2015-06-30 13F Corning COM 219350105 179,643 155,275 637.21 3,544 540.87 0.5353
2015-04-15 2015-03-31 13F Corning COM 219350105 24,368 -143,706 -85.50 553 -85.65 0.0800
2015-01-22 2014-12-31 13F Corning COM 219350105 168,074 18,714 12.53 3,854 33.40 0.5608
2014-10-10 2014-09-30 13F Corning COM 219350105 149,360 -2,390 -1.57 2,889 -13.27 0.4358
2014-07-17 2014-06-30 13F Corning COM 219350105 151,750 -3,880 -2.49 3,331 2.81 0.4897
2014-04-10 2014-03-31 13F Corning COM 219350105 155,630 -73,480 -32.07 3,240 -20.65 0.4958
2014-01-21 2013-12-31 13F Corning COM 219350105 229,110 -2,935 -1.26 4,083 20.58 0.5983
2013-10-17 2013-09-30 13F Corning COM 219350105 232,045 13,340 6.10 3,386 8.80 0.5451
2013-07-25 2013-06-30 13F Corning COM 219350105 218,705 218,705 3,112 0.5153
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.