Corning Incorporated
MX ˙ BMV ˙ US2193501051
SecurityMX:GLW / Corning Incorporated
InstitutionPrincipal Securities, Inc.
Latest Disclosed Ownership17,553 shares
Latest Disclosed Value $ 2,386,736
Principal Securities, Inc. reports 15.59% increase in ownership of GLW / Corning Incorporated

On May 13, 2026 - Principal Securities, Inc. filed a 13F-HR form disclosing ownership of 17,553 shares of Corning Incorporated (MX:GLW) valued at $2,386,736 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 15,185 shares of Corning Incorporated. This represents a change in shares of 15.59% 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)
2026-05-13 2026-03-31 13F CORNING COM 219350105 17,553 2,368 15.59 2,387 79.53 0.0350
2026-02-12 2025-12-31 13F CORNING COM 219350105 15,185 5,890 63.37 1,330 74.41 0.0205
2025-11-12 2025-09-30 13F CORNING COM 219350105 9,295 2,785 42.78 762 122.81 0.0126
2025-08-11 2025-06-30 13F CORNING COM 219350105 6,510 122 1.91 342 12.87 0.0064
2025-04-30 2025-03-31 13F CORNING COM 219350105 6,388 218 3.53 304 3.41 0.0068
2025-01-30 2024-12-31 13F CORNING COM 219350105 6,170 211 3.54 293 8.92 0.0066
2024-10-28 2024-09-30 13F CORNING COM 219350105 5,959 2,052 52.52 269 78.15 0.0065
2024-07-31 2024-06-30 13F CORNING COM 219350105 3,907 39 1.01 152 18.90 0.0042
2024-05-10 2024-03-31 13F CORNING COM 219350105 3,868 -252 -6.12 127 1.60 0.0040
2024-05-10 2023-12-31 13F/A-1 CORNING COM 219350105 4,120 4,120 125 0.0047
2024-02-07 2023-12-31 13F CORNING COM 219350105 4,120 4,120 125 0.0047
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.