SUMME GREGORY L
Director · Avantor, Inc.
Every open-market stock purchase SUMME GREGORY L has reported to the SEC on Form 4 that met our signal bar, parsed straight from the filings. This page tracks where those buys landed inside insider clusters and how the prices paid compare to where the stock trades now.
Where the buys stand today
- AVTR−9.1% vs price paidAvantor, Inc.
7 purchases totalling $4.6M at an average of $11.40 per share; the stock last traded at $10.37. See all insider buying in AVTR →
Avg price paid$11.40Latest price$10.37Market cap$7.1B
Cluster participation
Qualifying buys grouped with other insiders buying the same stock — the pattern this site exists to catch.
All reported buys
| Date | Ticker | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Feb 12, 2026 | AVTRcluster | 100,000 | $9.40 | $940.0K | SEC ↗ |
| Oct 30, 2025 | AVTRcluster | 100,000 | $11.25 | $1.1M | SEC ↗ |
| Aug 21, 2025 | AVTRcluster | 100,000 | $12.56 | $1.3M | SEC ↗ |
| May 23, 2025 | AVTRcluster | 30,000 | $12.50 | $375.0K | SEC ↗ |
| May 22, 2025 | AVTRcluster | 20,000 | $12.65 | $253.0K | SEC ↗ |
| May 7, 2025 | AVTRcluster | 25,000 | $12.00 | $300.0K | SEC ↗ |
| Apr 28, 2025 | AVTRcluster | 25,000 | $12.50 | $312.5K | SEC ↗ |
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About this data
Figures are parsed from SUMME GREGORY L's Form 4 filings on SEC EDGAR (CIK 1143422) and cover open-market purchases (transaction code P) — grants, option exercises, and sales are excluded, which is why totals here can differ from raw filing counts. Every row links to its source document.
This page is informational and reflects public filing data. It is not investment advice.