CHECK CAPITAL MANAGEMENT INC/CA GLW — Corning COM

Ownership history in CHECK CAPITAL MANAGEMENT INC/CA  ·  36 quarters on record

AI Ownership Summary

CHECK CAPITAL MANAGEMENT INC/CA reported Corning COM (GLW) in 36 quarterly 13F filings from 2024 Q3 through 2026 Q1. Peak portfolio weight reached 0.02% in 2026 Q1. The latest visible filing shows GLW at 0.02% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this GLW ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CHECK CAPITAL MANAGEMENT INC/CA's position in Corning COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

GLW was reported at 0.02% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.02% in 2026 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q3 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

GLW stock page CHECK CAPITAL MANAGEMENT INC/CA fund profile CHECK CAPITAL MANAGEMENT INC/CA full holdings
How CHECK CAPITAL MANAGEMENT INC/CA held GLW — position size vs. price
% of Fund (quarterly)    GLW price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 7 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 UNCHANGED — — — 5,050 — 0% 0.02% $687K 2026-05-04 $159.72
2025 Q4 UNCHANGED — — — 5,050 — 0% 0.01% $442K 2026-02-06 $121.75
2025 Q3 UNCHANGED — — — 5,050 — 0% 0.01% $414K 2025-11-06 $87.26
2025 Q2 UNCHANGED — — — 5,050 — 0% 0.01% $266K 2025-07-25 $54.76
2025 Q1 UNCHANGED — — — 5,050 — 0% 0.01% $231K 2025-05-02 $45.01
2024 Q4 UNCHANGED — — — 5,050 — 0% 0.01% $240K 2025-01-30 $48.89
2024 Q3 REDUCED — — — 5,050 -50 -1.0% 0.01% $228K 2024-11-06 $46.90
29 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding GLW

As of 2026 Q1 — sorted by position size

Burns Matteson Capital Management, LLC 15.91% Ariose Capital Management Ltd 3Y 7Y 11.57% Anther Capital Ltd 10.67% Eliot Finkel Investment Counsel, LLC 3Y 7Y 10.42% VMS Asset Management Limited 7.72% Minneapolis Portfolio Management Group, LLC 3Y 7Y 7.43% Founders Capital Management 3Y 7Y 7.07% Evergreen Quality Fund GP, Ltd. 6.25% O'Keefe Stevens Advisory, Inc. 3Y 6.02% JOHN G ULLMAN & ASSOCIATES INC 3Y 7Y 5.76%

FAQ About CHECK CAPITAL MANAGEMENT INC/CA and GLW

These are the practical questions this page is built to answer before you even open the full history table.

How long has CHECK CAPITAL MANAGEMENT INC/CA reported owning GLW?

CHECK CAPITAL MANAGEMENT INC/CA reported GLW across 7 quarterly 13F filings, from 2024 Q3 through 2026 Q1.

What was the largest reported GLW position in CHECK CAPITAL MANAGEMENT INC/CA's portfolio?

The largest reported portfolio weight for GLW was 0.02% in 2026 Q1.

What is the latest reported GLW position on this page?

The most recent filing on this page is 2026 Q1, when CHECK CAPITAL MANAGEMENT INC/CA reported 5,050 shares, equal to 0.02% of portfolio, with an estimated market value of $687K.

What does the chart on this GLW ownership page compare?

The chart compares CHECK CAPITAL MANAGEMENT INC/CA's quarterly GLW portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did CHECK CAPITAL MANAGEMENT INC/CA time their GLW position?

Based on 13F filing dates vs. subsequent GLW price moves, CHECK CAPITAL MANAGEMENT INC/CA correctly timed 8 out of 23 reported position changes (35%). The annualised alpha on GLW relative to SPY over the holding period was +62.5%.

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