GLW — CORNING INCORPORATED COM

Ownership history in JOHN G ULLMAN & ASSOCIATES INC  ·  107 quarters on record

AI Ownership Summary

JOHN G ULLMAN & ASSOCIATES INC reported CORNING INCORPORATED COM (GLW) in 107 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 4.52% in 2025 Q3. The latest visible filing shows GLW at 4.48% 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 JOHN G ULLMAN & ASSOCIATES INC's position in CORNING INCORPORATED 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
2025 Q4

GLW was reported at 4.48% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
4.52% in 2025 Q3

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

Time in book
Holding Window
2023 Q4 to 2025 Q4

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 JOHN G ULLMAN & ASSOCIATES INC fund profile JOHN G ULLMAN & ASSOCIATES INC full holdings
How JOHN G ULLMAN & ASSOCIATES INC held GLW — position size vs. price
% of Fund (quarterly)    GLW price (quarter-end, indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 383,531 -25,638 -6.3% 4.48% $33.6M 2026-02-14 (Est.) $133.21
2025 Q3 REDUCED 409,169 -151,070 -27.0% 4.52% $33.6M 2025-11-05 $86.64
2025 Q2 REDUCED 560,239 -5,693 -1.0% 4.37% $29.5M 2025-07-29 $61.40
2025 Q1 REDUCED 565,932 -54,975 -8.9% 4.00% $25.9M 2025-05-06 $44.10
2024 Q4 REDUCED 620,907 -48,970 -7.3% 4.34% $29.5M 2025-02-05 $52.20
2024 Q3 REDUCED 669,877 -33,554 -4.8% 4.35% $30.2M 2024-11-08 $47.44
2024 Q2 REDUCED 703,431 -10,402 -1.5% 4.17% $27.3M 2024-08-08 $37.34
2024 Q1 REDUCED 713,833 -30,875 -4.1% 3.61% $23.5M 2024-05-06 $32.10
2023 Q4 ADDED 744,708 +14,758 +2.0% 3.60% $22.7M 2024-01-31 $30.92
98 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

O'Keefe Stevens Advisory, Inc. 3Y 6.02% Werlinich Asset Management, LLC 4.68% Karras Company, Inc. 4.32% Green Alpha Advisors, LLC 3Y 3.64% Old Port Advisors 3Y 7Y 2.61% VIKING FUND MANAGEMENT LLC 3Y 7Y 2.58% Piscataqua Savings Bank 3Y 2.47% MFG WEALTH MANAGEMENT, INC. 1.67% Byrne Asset Management LLC 3Y 1.6% Kessler Investment Group, LLC 3Y 7Y 1.48%

FAQ About JOHN G ULLMAN & ASSOCIATES INC and GLW

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

How long has JOHN G ULLMAN & ASSOCIATES INC reported owning GLW?

JOHN G ULLMAN & ASSOCIATES INC reported GLW across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported GLW position in JOHN G ULLMAN & ASSOCIATES INC's portfolio?

The largest reported portfolio weight for GLW was 4.52% in 2025 Q3.

What is the latest reported GLW position on this page?

The most recent filing on this page is 2025 Q4, when JOHN G ULLMAN & ASSOCIATES INC reported 383,531 shares, equal to 4.48% of portfolio, with an estimated market value of $33.6M.

What does the chart on this GLW ownership page compare?

The chart compares JOHN G ULLMAN & ASSOCIATES INC'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.

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