Insider · SEC Form 4 filer
Gregory Summe
Past buys: 1 of 4 beat
Companies
Where they file as an insider
Grail (GRAL) Director Latest filing Oct 15, 2026
NXP Semiconductors N.V. (NXPI) Director Latest filing Jun 10, 2026
Wheels Up Experience (UP) Director Latest filing Jun 9, 2026
Avantor (AVTR) Director Latest filing May 7, 2026
State Street (STT) Director Latest filing Feb 18, 2025
Track record
Did their buys beat the typical stock?
Open-market buys7
Quarters checked 6 months later4
Beat the typical stock 1 of 4
Quarters too new to check0
1 of 4 checked quarters beat the typical stock. A past record is data, not a forecast.
Avantor (AVTR) Bought Feb 12, 2026 · $940K · 100,000 shares Beat typical Mar 31, 2026 $7.84 → Sep 30, 2026 $15.05 · +92.0% (typical stock +1.7%)
Avantor (AVTR) Bought Oct 30, 2025 · $1.12M · 100,000 shares Behind typical Dec 31, 2025 $11.46 → Jun 30, 2026 $9.90 · −13.6% (typical stock +4.7%)
Avantor (AVTR) Bought Aug 21, 2025 · $1.26M · 100,000 shares Behind typical Sep 30, 2025 $12.48 → Mar 31, 2026 $7.84 · −37.2% (typical stock −3.4%)
Avantor (AVTR) Bought Apr 28–May 23, 2025 · $1.24M · 100,000 shares Behind typical Jun 30, 2025 $13.46 → Dec 31, 2025 $11.46 · −14.9% (typical stock +2.1%)
Each row is one stock in one quarter, however many buys it took. We take the stock's price at the end of that quarter and again 6 months later, and compare it with the typical stock over the same dates. Prices are quarter-end values from funds' 13F reports (the middle value across 3 or more funds), through Sep 30, 2026. Moves past 3 times up or down, mostly stock splits, are left out. How we tested this.
Past results. This is data, not advice.
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