CORNING INC (GLW) Stock Institutional Trading Activity
CORNING INC (GLW) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Appaloosa Management, Olstein Capital Management, Mairs & Power Growth Fund, Cullen Value Fund, and Sequoia Financial Advisors. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q2 2020 | Olstein Capital Management | Buy | 44,000 | 340,000 | $8,806 |
| Q2 2020 | Mairs & Power Growth Fund | Sell | -199,699 | 2,207,240 | $57,168 |
| Q1 2020 | Dodge & Cox Stock Fund | Sell | -120,898 | 230,302 | $4,730 |
| Q1 2020 | Yacktman Asset Management | Sell | -2,975 | 1,217,012 | $24,997 |
| Q1 2020 | Sequoia Financial Advisors | Sell | -2,736 | 15,950 | $328 |
| Q1 2020 | Olstein Capital Management | Buy | 69,000 | 296,000 | $6,080 |
| Q1 2020 | Mairs & Power Growth Fund | Sell | -5,773 | 2,406,939 | $49,439 |
| Q4 2019 | Mairs & Power Growth Fund | Sell | -20,589 | 2,412,712 | $70,234 |
| Q4 2019 | Dodge & Cox Stock Fund | Sell | -11,350 | 351,200 | $10,223 |
| Q4 2019 | Yacktman Asset Management | Sell | -265 | 1,219,987 | $35,514 |
| Q4 2019 | Sequoia Financial Advisors | Buy | 3,111 | 18,686 | $544 |
| Q4 2019 | Olstein Capital Management | Buy | 17,000 | 227,000 | $6,608 |
| Q4 2019 | Renaissance Technologies LLC | Sell | -368,000 | 1,640,000 | $47,740 |
| Q3 2019 | Mairs & Power Growth Fund | Buy | 204,303 | 2,433,301 | $69,398 |
| Q3 2019 | Dodge & Cox Stock Fund | Sell | -50,814 | 362,550 | $10,340 |
| Q3 2019 | Yacktman Asset Management | Sell | -45 | 1,220,252 | $34,802 |
| Q3 2019 | Sequoia Financial Advisors | Sell | -61,523 | 15,575 | $444 |
| Q3 2019 | Olstein Capital Management | Buy | 56,000 | 210,000 | $5,989 |
| Q2 2019 | Mairs & Power Growth Fund | Buy | 120,495 | 2,228,998 | $74,070 |
| Q2 2019 | Dodge & Cox Stock Fund | Sell | -55,213 | 413,364 | $13,736 |
| Q2 2019 | Yacktman Asset Management | Sell | -32,109 | 1,220,297 | $40,550 |
| Q2 2019 | Olstein Capital Management | Buy | 17,000 | 154,000 | $5,117 |
| Q1 2019 | Mairs & Power Growth Fund | Sell | -19,303 | 2,108,503 | $69,791 |
| Q1 2019 | Dodge & Cox Stock Fund | Sell | -101,795 | 468,577 | $15,510 |
| Q1 2019 | Yacktman Asset Management | Buy | 2,849 | 1,252,406 | $41,455 |
| Q1 2019 | Olstein Capital Management | Sell | -15,000 | 137,000 | $4,535 |
| Q1 2019 | Renaissance Technologies LLC | Buy | 1,585,600 | 2,008,000 | $66,465 |
| Q4 2018 | Mairs & Power Growth Fund | Sell | -11,855 | 2,127,806 | $64,281 |
| Q4 2018 | Dodge & Cox Stock Fund | Sell | -54,202 | 570,372 | $17,231 |
| Q4 2018 | Yacktman Asset Management | Buy | 2,475 | 1,249,557 | $37,749 |
Frequently asked questions about GLW activity
Which institutional owners are buying GLW?
Institutional owners buying GLW include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in GLW activity?
"Buy" means an investor increased their reported position in GLW compared to the prior reporting period. This reflects growing exposure to CORNING INC (GLW) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in GLW increasing?
Institutional interest in GLW can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.