Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionTocqueville Asset Management L.p.
Latest Disclosed Ownership175,034 shares
Latest Disclosed Value $ 23,799,326
Tocqueville Asset Management L.p. reports 1.59% decrease in ownership of GLW / Corning Incorporated

On May 12, 2026 - Tocqueville Asset Management L.p. filed a 13F-HR form disclosing ownership of 175,034 shares of Corning Incorporated (MX:GLW) valued at $23,799,326 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 177,854 shares of Corning Incorporated. This represents a change in shares of -1.59% 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)
2026-05-12 2026-03-31 13F CORNING COM 219350105 175,034 -2,820 -1.59 23,799 52.83 0.3529
2026-02-12 2025-12-31 13F CORNING COM 219350105 177,854 9,018 5.34 15,573 12.44 0.2272
2025-11-13 2025-09-30 13F CORNING COM 219350105 168,836 1,287 0.77 13,850 57.18 0.2013
2025-08-12 2025-06-30 13F CORNING COM 219350105 167,549 -5,840 -3.37 8,811 11.01 0.1341
2025-05-13 2025-03-31 13F CORNING COM 219350105 173,389 -18,565 -9.67 7,938 -12.98 0.1296
2025-02-10 2024-12-31 13F CORNING COM 219350105 191,954 2,378 1.25 9,122 6.57 0.1431
2024-11-08 2024-09-30 13F CORNING COM 219350105 189,576 18,900 11.07 8,559 29.10 0.1344
2024-08-12 2024-06-30 13F CORNING COM 219350105 170,676 1,598 0.95 6,631 18.99 0.1095
2024-05-09 2024-03-31 13F CORNING COM 219350105 169,078 0 0.00 5,573 8.24 0.0910
2024-02-12 2023-12-31 13F CORNING COM 219350105 169,078 -9,187 -5.15 5,148 -5.21 0.0933
2023-11-09 2023-09-30 13F CORNING COM 219350105 178,265 -63 -0.04 5,432 -13.08 0.1032
2023-08-11 2023-06-30 13F CORNING COM 219350105 178,328 -4,155 -2.28 6,249 -2.94 0.1119
2023-05-10 2023-03-31 13F CORNING COM 219350105 182,483 -75 -0.04 6,438 10.41 0.1216
2023-02-09 2022-12-31 13F CORNING COM 219350105 182,558 0 0.00 5,831 10.04 0.1107
2022-11-10 2022-09-30 13F CORNING COM 219350105 182,558 -322 -0.18 5,298 -8.07 0.1080
2022-08-12 2022-06-30 13F CORNING COM 219350105 182,880 3,130 1.74 5,763 -13.14 0.1054
2022-05-16 2022-03-31 13F Corning COM 219350105 179,750 -1,132 -0.63 6,635 -1.47 0.1002
2022-02-14 2021-12-31 13F CORNING COM 219350105 180,882 0 0.00 6,734 2.03 0.0926
2021-11-15 2021-09-30 13F CORNING COM 219350105 180,882 103 0.06 6,600 -10.74 0.0978
2021-08-16 2021-06-30 13F CORNING COM 219350105 180,779 0 0.00 7,394 -6.00 0.1068
2021-05-17 2021-03-31 13F CORNING COM 219350105 180,779 -375 -0.21 7,866 20.61 0.1210
2021-02-16 2020-12-31 13F CORNING COM 219350105 181,154 -20 -0.01 6,522 11.07 0.1089
2020-11-16 2020-09-30 13F CORNING COM 219350105 181,174 -2,853 -1.55 5,872 23.21 0.1123
2020-08-12 2020-06-30 13F CORNING COM 219350105 184,027 -5,870 -3.09 4,766 22.21 0.0994
2020-05-15 2020-03-31 13F CORNING COM 219350105 189,897 -4,310 -2.22 3,900 -31.01 0.0969
2020-01-14 2019-12-31 13F Corning COM 219350105 194,207 -563,054 -74.35 5,653 -73.83 0.0831
2019-10-31 2019-09-30 13F Corning COM 219350105 757,261 -12,334 -1.60 21,597 -15.55 0.2931
2019-07-31 2019-06-30 13F Corning COM 219350105 769,595 -28,173 -3.53 25,574 -3.15 0.3314
2019-04-30 2019-03-31 13F Corning COM 219350105 797,768 -179,883 -18.40 26,406 -10.59 0.3525
2019-02-08 2018-12-31 13F Corning COM 219350105 977,651 8,566 0.88 29,535 -13.66 0.4426
2018-11-13 2018-09-30 13F Corning COM 219350105 969,085 -18,577 -1.88 34,209 25.90 0.4310
2018-08-13 2018-06-30 13F Corning COM 219350105 987,662 -35,781 -3.50 27,171 -4.78 0.3447
2018-05-14 2018-03-31 13F Corning COM 219350105 1,023,443 -191,097 -15.73 28,534 -26.56 0.3635
2018-02-13 2017-12-31 13F Corning COM 219350105 1,214,540 -13,095 -1.07 38,853 5.78 0.4411
2017-10-30 2017-09-30 13F Corning COM 219350105 1,227,635 -4,947 -0.40 36,731 -0.83 0.4224
2017-08-04 2017-06-30 13F Corning COM 219350105 1,232,582 -16,823 -1.35 37,039 9.80 0.4444
2017-04-28 2017-03-31 13F Corning COM 219350105 1,249,405 -43,715 -3.38 33,734 7.49 0.4116
2017-01-30 2016-12-31 13F Corning COM 219350105 1,293,120 84,716 7.01 31,384 9.81 0.4013
2016-10-31 2016-09-30 13F Corning COM 219350105 1,208,404 -109,629 -8.32 28,579 5.88 0.3431
2016-08-15 2016-06-30 13F/A-1 Corning COM 219350105 1,318,033 -22,071 -1.65 26,993 -3.58 0.3216
2016-07-29 2016-06-30 13F Corning COM 219350105 1,318,033 26,993
2016-04-29 2016-03-31 13F Corning COM 219350105 1,340,104 -13,581 -1.00 27,995 13.13 0.3708
2016-01-29 2015-12-31 13F Corning COM 219350105 1,353,685 93,798 7.44 24,745 14.72 0.3355
2015-10-30 2015-09-30 13F Corning COM 219350105 1,259,887 198,391 18.69 21,569 2.99 0.2885
2015-07-31 2015-06-30 13F Corning COM 219350105 1,061,496 -47,210 -4.26 20,943 -16.71 0.2467
2015-04-30 2015-03-31 13F Corning COM 219350105 1,108,706 1,108,706 0.00 25,145 0.2955
2015-01-30 2014-12-31 13F Corning COM 219350105 0 -1,315,458 -100.00 0 -100.00
2014-10-30 2014-09-30 13F Corning COM 219350105 1,315,458 -42,901 -3.16 25,441 -14.67 0.2824
2014-09-18 2014-06-30 13F/A-1 Corning COM 219350105 1,358,359 -118,401 -8.02 29,816 -3.02 0.2902
2014-07-30 2014-06-30 13F Corning COM 219350105 1,358,359 29,816
2014-04-30 2014-03-31 13F Corning COM 219350105 1,476,760 -19,307 -1.29 30,746 15.33 0.4047
2014-01-30 2013-12-31 13F Corning COM 219350105 1,496,067 424,326 39.59 26,660 70.49 0.3584
2013-10-30 2013-09-30 13F Corning COM 219350105 1,071,741 -38,000 -3.42 15,637 -0.98 0.1949
2013-07-30 2013-06-30 13F Corning COM 219350105 1,109,741 1,109,741 15,792 0.2138
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.