Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionSumitomo Life Insurance Co
Latest Disclosed Ownership7,902 shares
Latest Disclosed Value $ 1,074,435
Sumitomo Life Insurance Co ownership in GLW / Corning Incorporated

On May 12, 2026 - Sumitomo Life Insurance Co filed a 13F-HR form disclosing ownership of 7,902 shares of Corning Incorporated (MX:GLW) valued at $1,074,435 USD as of March 31, 2026. The entity filed a previous 13F-HR on October 22, 2015 disclosing 0 shares of Corning Incorporated.

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)
2026-05-12 2026-03-31 13F CORNING INC COM Common 219350105 7,902 7,902 1,074 0.0253
2015-10-22 2015-09-30 13F CORNING INC COM Common 219350105 0 -90,254 -100.00 0 -100.00
2015-07-29 2015-06-30 13F CORNING INC COM Common 219350105 90,254 -11,166 -11.01 1,781 -22.57 0.2170
2015-04-30 2015-03-31 13F CORNING INC COM Common 219350105 101,420 101,420 2,300 0.2537
2015-02-04 2014-12-31 13F CORNING INC COM Common 219350105 0 -118,354 -100.00 0 -100.00
2014-11-04 2014-09-30 13F CORNING INC COM Common 219350105 118,354 -3,241 -2.67 2,289 -14.24 0.2238
2014-07-30 2014-06-30 13F CORNING INC COM Common 219350105 121,595 636 0.53 2,669 6.00 0.2552
2014-05-02 2014-03-31 13F CORNING INC COM Common 219350105 120,959 -10,027 -7.66 2,518 7.88 0.2444
2014-02-07 2013-12-31 13F CORNING INC COM Common 219350105 130,986 -7,455 -5.38 2,334 15.54 0.2101
2013-11-13 2013-09-30 13F CORNING INC COM Common 219350105 138,441 -5,099 -3.55 2,020 -1.13 0.1883
2013-08-08 2013-06-30 13F CORNING INC COM Common 021935010 143,540 143,540 2,043 0.1956
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.