4 hedge funds and family offices disclose a GLW position in their latest SEC 13F filing — combined $29.0M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Leopold Aschenbrenner | Situational Awareness LP | 154,600 | $21.0M | 0.15% | 2026-03-31 |
| 2 | Mairs & Power | Mairs & Power Inc | 90,350 | $7.9M | 0.08% | 2025-12-31 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 314 | $27K | 0.00% | 2025-12-31 |
| 4 | Olstein Capital Management | Olstein Capital Management LP | 30,000 | $3K | 0.54% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold GLW. The largest disclosed position is Leopold Aschenbrenner at $21.0M (0.2% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying GLW, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
4 hedge funds and family offices disclose a GLW position in their latest SEC 13F filing — combined $29.0M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Leopold Aschenbrenner | Situational Awareness LP | 154,600 | $21.0M | 0.15% | 2026-03-31 |
| 2 | Mairs & Power | Mairs & Power Inc | 90,350 | $7.9M | 0.08% | 2025-12-31 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 314 | $27K | 0.00% | 2025-12-31 |
| 4 | Olstein Capital Management | Olstein Capital Management LP | 30,000 | $3K | 0.54% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold GLW. The largest disclosed position is Leopold Aschenbrenner at $21.0M (0.2% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying GLW, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
