Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionBlair William & Co/il
Latest Disclosed Ownership291,140 shares
Latest Disclosed Value $ 39,586,346
Blair William & Co/il reports 6.04% decrease in ownership of GLW / Corning Incorporated

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 291,140 shares of Corning Incorporated (MX:GLW) valued at $39,586,346 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 309,855 shares of Corning Incorporated. This represents a change in shares of -6.04% 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)
2026-05-08 2026-03-31 13F CORNING COM 219350105 291,140 -18,715 -6.04 39,586 45.91 0.1134
2026-02-17 2025-12-31 13F CORNING COM 219350105 309,855 34,713 12.62 27,131 20.21 0.0728
2025-11-12 2025-09-30 13F CORNING COM 219350105 275,142 -11,078 -3.87 22,570 49.94 0.0601
2025-07-24 2025-06-30 13F CORNING COM 219350105 286,220 -17,197 -5.67 15,052 8.37 0.0418
2025-05-09 2025-03-31 13F CORNING COM 219350105 303,417 40,904 15.58 13,890 11.35 0.0419
2025-02-12 2024-12-31 13F CORNING COM 219350105 262,513 41,144 18.59 12,475 24.81 0.0363
2024-11-12 2024-09-30 13F CORNING COM 219350105 221,369 -1,920 -0.86 9,995 15.22 0.0294
2024-08-12 2024-06-30 13F CORNING COM 219350105 223,289 3,207 1.46 8,675 19.59 0.0268
2024-05-09 2024-03-31 13F CORNING COM 219350105 220,082 -8,493 -3.72 7,254 4.21 0.0228
2024-02-12 2023-12-31 13F CORNING COM 219350105 228,575 10,650 4.89 6,960 4.82 0.0237
2023-11-09 2023-09-30 13F CORNING COM 219350105 217,925 -6,344 -2.83 6,640 -15.50 0.0255
2023-08-11 2023-06-30 13F CORNING COM 219350105 224,269 -11,422 -4.85 7,858 -5.50 0.0288
2023-05-12 2023-03-31 13F CORNING COM 219350105 235,691 -496 -0.21 8,315 10.23 0.0332
2023-02-10 2022-12-31 13F CORNING COM 219350105 236,187 -1,712 -0.72 7,544 9.26 0.0328
2022-11-09 2022-09-30 13F CORNING COM 219350105 237,899 1,996 0.85 6,904 -7.12 0.0317
2022-08-10 2022-06-30 13F CORNING COM 219350105 235,903 2,177 0.93 7,433 -13.84 0.0330
2022-05-13 2022-03-31 13F CORNING COM 219350105 233,726 -91 -0.04 8,627 -0.90 0.0302
2022-02-14 2021-12-31 13F CORNING COM 219350105 233,817 14,008 6.37 8,705 8.53 0.0273
2021-11-12 2021-09-30 13F CORNING COM 219350105 219,809 -950 -0.43 8,021 -11.16 0.0273
2021-08-12 2021-06-30 13F CORNING COM 219350105 220,759 -14,184 -6.04 9,029 -11.67 0.0313
2021-05-13 2021-03-31 13F CORNING COM 219350105 234,943 -6,301 -2.61 10,222 17.70 0.0386
2021-02-09 2020-12-31 13F CORNING COM 219350105 241,244 466 0.19 8,685 11.29 0.0318
2020-11-06 2020-09-30 13F CORNING COM 219350105 240,778 61,870 34.58 7,804 68.41 0.0331
2020-08-12 2020-06-30 13F CORNING COM 219350105 178,908 94,490 111.93 4,634 167.24 0.0221
2020-05-11 2020-03-31 13F CORNING COM 219350105 84,418 -5,260 -5.87 1,734 -33.59 0.0108
2020-02-13 2019-12-31 13F CORNING COM 219350105 89,678 -58,545 -39.50 2,611 -38.23 0.0134
2019-11-12 2019-09-30 13F CORNING COM 219350105 148,223 -4,625 -3.03 4,227 -16.77 0.0244
2019-08-13 2019-06-30 13F CORNING COM 219350105 152,848 4,653 3.14 5,079 3.55 0.0290
2019-05-14 2019-03-31 13F CORNING COM 219350105 148,195 2,668 1.83 4,905 11.58 0.0299
2019-02-14 2018-12-31 13F CORNING COM 219350105 145,527 -4,931 -3.28 4,396 -17.23 0.0321
2018-11-13 2018-09-30 13F CORNING COM 219350105 150,458 -7,751 -4.90 5,311 22.04 0.0325
2018-08-13 2018-06-30 13F CORNING COM 219350105 158,209 -3,938 -2.43 4,352 -3.74 0.0296
2018-05-15 2018-03-31 13F CORNING COM 219350105 162,147 -6,112 -3.63 4,521 -16.01 0.0320
2018-02-14 2017-12-31 13F CORNING COM 219350105 168,259 1,522 0.91 5,383 7.90 0.0365
2017-11-13 2017-09-30 13F CORNING COM 219350105 166,737 -5,077 -2.95 4,989 -3.37 0.0374
2017-08-04 2017-06-30 13F CORNING COM 219350105 171,814 8,291 5.07 5,163 15.56 0.0388
2017-05-10 2017-03-31 13F CORNING COM 219350105 163,523 4,579 2.88 4,468 15.81 0.0360
2017-02-14 2016-12-31 13F CORNING COM 219350105 158,944 259 0.16 3,858 2.80 0.0345
2016-11-14 2016-09-30 13F CORNING COM 219350105 158,685 -730 -0.46 3,753 14.95 0.0332
2016-08-08 2016-06-30 13F CORNING COM 219350105 159,415 9,467 6.31 3,265 4.25 0.0304
2016-05-16 2016-03-31 13F CORNING COM 219350105 149,948 27,715 22.67 3,132 40.20 0.0295
2016-02-16 2015-12-31 13F CORNING COM 219350105 122,233 11,439 10.32 2,234 17.83 0.0210
2015-11-12 2015-09-30 13F CORNING COM 219350105 110,794 730 0.66 1,896 -12.67 0.0164
2015-08-03 2015-06-30 13F CORNING COM 219350105 110,064 -898 -0.81 2,171 -13.71 0.0032
2015-05-11 2015-03-31 13F CORNING COM 219350105 110,962 110,962 0.00 2,516 0.0039
2015-02-05 2014-12-31 13F CORNING COM 219350105 0 -103,495 -100.00 0 -100.00
2014-11-04 2014-09-30 13F CORNING COM 219350105 103,495 -52,046 -33.46 2,001 -41.37 0.0034
2014-08-01 2014-06-30 13F CORNING COM 219350105 155,541 -45,520 -22.64 3,413 -18.47 0.0056
2014-05-06 2014-03-31 13F CORNING COM 219350105 201,061 -9,738 -4.62 4,186 11.45 0.0069
2014-02-11 2013-12-31 13F CORNING COM 219350105 210,799 50,553 31.55 3,756 60.65 0.0062
2013-11-12 2013-09-30 13F CORNING COM 219350105 160,246 79,558 98.60 2,338 103.84 0.0042
2013-08-07 2013-06-30 13F CORNING COM 219350105 80,688 80,688 1,147 0.0023
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.