Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionArmbruster Capital Management, Inc.
Latest Disclosed Ownership2,769 shares
Latest Disclosed Value $ 376,501
Armbruster Capital Management, Inc. ownership in GLW / Corning Incorporated

On April 21, 2026 - Armbruster Capital Management, Inc. filed a 13F-HR form disclosing ownership of 2,769 shares of Corning Incorporated (MX:GLW) valued at $376,501 USD as of March 31, 2026. The entity filed a previous 13F-HR on July 30, 2018 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.

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)
2026-04-21 2026-03-31 13F CORNING COM 219350105 2,769 2,769 377 0.0617
2018-07-30 2018-06-30 13F CORNING COM 219350105 0 -3,000 -100.00 0 -100.00
2018-04-18 2018-03-31 13F CORNING COM 219350105 3,000 -230 -7.12 84 -18.45 0.0533
2018-02-02 2017-12-31 13F CORNING COM 219350105 3,230 230 7.67 103 14.44 0.0471
2017-11-08 2017-09-30 13F Corning Equities 219350105 3,000 0 0.00 90 0.00 0.0461
2017-08-01 2017-06-30 13F Corning Equities 219350105 3,000 -2,700 -47.37 90 -41.56 0.0486
2017-05-08 2017-03-31 13F Corning Equities 219350105 5,700 -400 -6.56 154 4.05 0.0860
2017-02-06 2016-12-31 13F Corning Equities 219350105 6,100 0 0.00 148 2.78 0.0867
2016-10-25 2016-09-30 13F Corning Equities 219350105 6,100 0 0.00 144 15.20 0.0892
2016-07-29 2016-06-30 13F Corning Equities 219350105 6,100 0 0.00 125 -1.57 0.0809
2016-05-03 2016-03-31 13F Corning Equities 219350105 6,100 -500 -7.58 127 4.96 0.0868
2016-01-26 2015-12-31 13F Corning Equities 219350105 6,600 6,600 121 0.1080
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.