Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership2,377,902 shares
Latest Disclosed Value $ 323,323,335
Assenagon Asset Management S.A. reports 26.39% increase in ownership of GLW / Corning Incorporated

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 2,377,902 shares of Corning Incorporated (MX:GLW) valued at $323,323,335 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 1,881,336 shares of Corning Incorporated. This represents a change in shares of 26.39% 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)
2026-04-20 2026-03-31 13F CORNING COM 219350105 2,377,902 496,566 26.39 323,323 96.28 0.4908
2026-01-09 2025-12-31 13F CORNING COM 219350105 1,881,336 -802,161 -29.89 164,730 -25.17 0.2268
2025-10-07 2025-09-30 13F CORNING COM 219350105 2,683,497 1,495,277 125.84 220,127 252.27 0.3010
2025-07-11 2025-06-30 13F CORNING COM 219350105 1,188,220 -1,763,718 -59.75 62,488 -53.76 0.0928
2025-04-15 2025-03-31 13F CORNING COM 219350105 2,951,938 1,483,151 100.98 135,140 93.62 0.2254
2025-01-14 2024-12-31 13F CORNING COM 219350105 1,468,787 329,893 28.97 69,797 35.73 0.1126
2024-10-23 2024-09-30 13F CORNING COM 219350105 1,138,894 554,474 94.88 51,421 126.48 0.0946
2024-07-18 2024-06-30 13F CORNING COM 219350105 584,420 -2,139,805 -78.55 22,705 -74.71 0.0505
2024-04-24 2024-03-31 13F CORNING COM 219350105 2,724,225 1,227,863 82.06 89,790 97.06 0.2125
2024-01-17 2023-12-31 13F CORNING COM 219350105 1,496,362 1,124,787 302.71 45,564 302.47 0.1209
2023-11-06 2023-09-30 13F CORNING COM 219350105 371,575 95,926 34.80 11,322 17.22 0.0351
2023-07-25 2023-06-30 13F CORNING COM 219350105 275,649 137,591 99.66 9,659 98.32 0.0334
2023-04-18 2023-03-31 13F CORNING COM 219350105 138,058 -920,832 -86.96 4,871 14,657.58 0.0173
2023-01-12 2022-12-31 13F CORNING COM 219350105 1,058,890 467,058 78.92 34 -99.81 0.1220
2022-10-27 2022-09-30 13F CORNING COM 219350105 591,832 550,749 1,340.58 17,175 1,226.25 0.0659
2022-07-27 2022-06-30 13F CORNING COM 219350105 41,083 6,480 18.73 1,295 1.41 0.0048
2022-04-25 2022-03-31 13F CORNING COM 219350105 34,603 -51,778 -59.94 1,277 -60.29 0.0035
2022-02-01 2021-12-31 13F CORNING COM 219350105 86,381 79,880 1,228.73 3,216 1,256.96 0.0093
2021-10-19 2021-09-30 13F CORNING COM 219350105 6,501 -564,903 -98.86 237 -98.99 0.0008
2021-07-15 2021-06-30 13F CORNING COM 219350105 571,404 54,354 10.51 23,370 3.88 0.0793
2021-04-26 2021-03-31 13F CORNING COM 219350105 517,050 -94,949 -15.51 22,497 2.11 0.0913
2021-02-01 2020-12-31 13F CORNING COM 219350105 611,999 584,337 2,112.42 22,032 2,356.19 0.0960
2020-10-07 2020-09-30 13F CORNING COM 219350105 27,662 27,662 897 0.0050
2020-04-17 2020-03-31 13F CORNING COM 219350105 0 -174,547 -100.00 0 -100.00
2020-01-17 2019-12-31 13F CORNING COM 219350105 174,547 -1,287 -0.73 5,081 1.32 0.0320
2019-10-16 2019-09-30 13F CORNING COM 219350105 175,834 22,027 14.32 5,015 -1.88 0.0336
2019-08-12 2019-06-30 13F CORNING COM 219350105 153,807 -45,027 -22.65 5,111 -22.34 0.0384
2019-04-26 2019-03-31 13F CORNING COM 219350105 198,834 159,834 409.83 6,581 458.66 0.0617
2019-01-23 2018-12-31 13F CORNING COM 219350105 39,000 -230,782 -85.54 1,178 -87.63 0.0133
2018-10-29 2018-09-30 13F CORNING COM 219350105 269,782 -272,522 -50.25 9,523 -36.17 0.0940
2018-07-17 2018-06-30 13F CORNING COM 219350105 542,304 542,304 14,919 0.1722
2018-01-25 2017-12-31 13F CORNING COM 219350105 0 -32,000 -100.00 0 -100.00
2017-10-18 2017-09-30 13F CORNING COM 219350105 32,000 0 0.00 957 -0.52 0.0089
2017-07-19 2017-06-30 13F CORNING COM 219350105 32,000 0 0.00 962 11.34 0.0208
2017-05-04 2017-03-31 13F CORNING COM 219350105 32,000 0 0.00 864 11.20 0.0185
2017-02-27 2016-12-31 13F CORNING COM 219350105 32,000 32,000 777 0.0145
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.