Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionMassmutual Trust Co Fsb/adv
Latest Disclosed Ownership24,723 shares
Latest Disclosed Value $ 3,361,586
Massmutual Trust Co Fsb/adv reports 23.33% decrease in ownership of GLW / Corning Incorporated

On April 13, 2026 - Massmutual Trust Co Fsb/adv filed a 13F-HR form disclosing ownership of 24,723 shares of Corning Incorporated (MX:GLW) valued at $3,361,586 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 7, 2026 disclosing 32,244 shares of Corning Incorporated. This represents a change in shares of -23.33% 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 Common / Ordinary Stock 219350105 24,723 -7,521 -23.33 3,362 19.06 0.0915
2026-01-07 2025-12-31 13F Corning Common / Ordinary Stock 219350105 32,244 -11,549 -26.37 2,823 -21.41 0.0727
2025-10-22 2025-09-30 13F Corning Common / Ordinary Stock 219350105 43,793 -993 -2.22 3,592 52.53 0.0915
2025-07-09 2025-06-30 13F Corning Common / Ordinary Stock 219350105 44,786 -249 -0.55 2,355 14.26 0.0628
2025-04-01 2025-03-31 13F Corning Common / Ordinary Stock 219350105 45,035 -12,151 -21.25 2,062 -24.14 0.0596
2025-01-16 2024-12-31 13F Corning Common / Ordinary Stock 219350105 57,186 -1,243 -2.13 2,717 2.99 0.0762
2024-10-02 2024-09-30 13F Corning Common / Ordinary Stock 219350105 58,429 -460 -0.78 2,638 15.35 0.0751
2024-07-02 2024-06-30 13F Corning Common / Ordinary Stock 219350105 58,889 2,112 3.72 2,288 22.23 0.0694
2024-04-09 2024-03-31 13F Corning Common / Ordinary Stock 219350105 56,777 24,421 75.48 1,871 89.95 0.0582
2024-01-03 2023-12-31 13F Corning Common / Ordinary Stock 219350105 32,356 -2,920 -8.28 985 -8.29 0.0331
2023-10-04 2023-09-30 13F Corning Common / Ordinary Stock 219350105 35,276 1,038 3.03 1,075 -10.43 0.0397
2023-08-02 2023-06-30 13F Corning Common / Ordinary Stock 219350105 34,238 33,062 2,811.39 1,200 2,824.39 0.0431
2023-04-11 2023-03-31 13F Corning Common / Ordinary Stock 219350105 1,176 307 35.33 41 0.0016
2023-01-06 2022-12-31 13F Corning Common / Ordinary Stock 219350105 869 159 22.39 0 0.0012
2022-10-07 2022-09-30 13F Corning Common / Ordinary Stock 219350105 710 243 52.03 0 0.0010
2022-07-07 2022-06-30 13F Corning Common / Ordinary Stock 219350105 467 69 17.34 0 0.0006
2022-04-08 2022-03-31 13F Corning Common / Ordinary Stock 219350105 398 280 237.29 0 0.0006
2022-02-09 2021-12-31 13F Corning Common / Ordinary Stock 219350105 118 51 76.12 0 0.0001
2021-11-12 2021-09-30 13F Corning Common / Ordinary Stock 219350105 67 -62 -48.06 0 0.0001
2021-08-16 2021-06-30 13F Corning Common / Ordinary Stock 219350105 129 -1,920 -93.70 0 0.0002
2021-05-17 2021-03-31 13F Corning Common / Ordinary Stock 219350105 2,049 28 1.39 0 0.0042
2021-02-16 2020-12-31 13F Corning Common / Ordinary Stock 219350105 2,021 -979 -32.63 0 0.0037
2020-11-13 2020-09-30 13F Corning Common / Ordinary Stock 219350105 3,000 -14,781 -83.13 0 -100.00 0.0057
2020-08-13 2020-06-30 13F Corning Common / Ordinary Stock 219350105 17,781 4,609 34.99 461 70.11 0.0297
2020-05-15 2020-03-31 13F Corning Common / Ordinary Stock 219350105 13,172 1,050 8.66 271 -23.23 0.0216
2020-05-15 2019-12-31 13F Corning Common / Ordinary Stock 219350105 12,122 -976 -7.45 353 -5.61 0.0218
2019-11-14 2019-09-30 13F Corning Common / Ordinary Stock 219350105 13,098 -337 -2.51 374 -16.14 0.0250
2019-08-14 2019-06-30 13F Corning Common / Ordinary Stock 219350105 13,435 447 3.44 446 3.96 0.0308
2019-05-15 2019-03-31 13F Corning Common / Ordinary Stock 219350105 12,988 -49 -0.38 430 9.16 0.0310
2019-02-26 2018-12-31 13F Corning Common / Ordinary Stock 219350105 13,037 2,327 21.73 394 3.97 0.0337
2018-11-09 2018-09-30 13F Corning Common / Ordinary Stock 219350105 10,710 257 2.46 378 31.71 0.0281
2018-08-20 2018-06-30 13F Corning Common / Ordinary Stock 219350105 10,453 555 5.61 288 4.36 0.0230
2018-05-21 2018-03-31 13F Corning Common / Ordinary Stock 219350105 9,898 -2,364 -19.28 276 -29.85 0.0228
2018-03-01 2017-12-31 13F/A-1 Corning Common / Ordinary Stock 219350105 12,262 189 1.57 392 8.59 0.0325
2018-02-21 2017-12-31 13F FLIR Systems Common / Ordinary Stock 219350105 97 -11,976 5
2018-02-13 2017-09-30 13F Corning common 219350105 12,073 895 8.01 361 7.76 0.0299
2017-08-14 2017-06-30 13F Corning common 219350105 11,178 2,220 24.78 336 39.00 0.0299
2017-05-02 2017-03-31 13F Corning common 219350105 8,958 2,115 30.91 242 45.18 0.0227
2017-02-13 2016-12-31 13F Corning common 219350105 6,843 874 14.64 166 36.07 0.0203
2016-08-10 2016-06-30 13F CORNING INC COM common 219350105 5,969 3,744 168.27 122 165.22 0.0154
2016-05-10 2016-03-31 13F CORNING INC COM common 219350105 2,225 840 60.65 46 84.00 0.0063
2016-02-12 2015-12-31 13F CORNING INC COM common 219350105 1,385 -6,078 -81.44 25 -82.64 0.0036
2015-11-04 2015-09-30 13F CORNING INC COM common 219350105 7,463 -7,585 -50.41 144 -56.36 0.0305
2015-07-29 2015-06-30 13F CORNING INC COM common 219350105 15,048 12,175 423.77 330 407.69 0.0738
2015-05-11 2015-03-31 13F CORNING INC COM common 219350105 2,873 -4,435 -60.69 65 -61.08 0.0107
2015-02-05 2014-12-31 13F CORNING INC COM common 219350105 7,308 -155 -2.08 168 15.97 0.0542
2014-11-04 2014-09-30 13F CORNING INC COM COMMON STOCK 219350105 7,463 -7,210 -49.14 144 -55.28 0.0287
2014-07-09 2014-06-30 13F CORNING INC COM COMMON STOCK 219350105 14,673 13,334 995.82 322 1,092.59 0.1273
2014-05-15 2014-03-31 13F CORNING INC COM common 219350105 1,339 1,281 2,208.62 28 2,600.00 0.0163
2014-02-14 2013-12-31 13F/A-1 CORNING INC COM COMMON STOCK 219350105 58 58 1 0.0010
2014-02-13 2013-12-31 13F CORNING INC COM COMMON STOCK 219350105 58 1 0.0010
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.