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US INSIDER PROFILE · NON-SCORING RESEARCH
SUMME GREGORY L
Director
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001143422
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 2
- Purchases · 24M
- 7
- Average purchase
- $651.6K
- Median purchase
- $375.0K
- Gross purchase value
- $4.6M
Companies: Avantor, Inc.
7 SEC accession(s) · 0 joint-owner event(s). Values are reported Form 4 transaction values in USD.
Qualifying purchase disclosures
| Published | Company | Ticker | Role | Reported value | SEC source |
|---|---|---|---|---|---|
| 2026-02-12 | Avantor, Inc. | AVTR | Director | $940.0K | Open filing |
| 2025-10-31 | Avantor, Inc. | AVTR | Director | $1.1M | Open filing |
| 2025-08-22 | Avantor, Inc. | AVTR | Director | $1.3M | Open filing |
| 2025-05-27 | Avantor, Inc. | AVTR | Director | $375.0K | Open filing |
| 2025-05-22 | Avantor, Inc. | AVTR | Director | $253.0K | Open filing |
| 2025-05-09 | Avantor, Inc. | AVTR | Director | $300.0K | Open filing |
| 2025-04-29 | Avantor, Inc. | AVTR | Director | $312.5K | Open filing |
Post-purchase outcomes
Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.
No completed point-in-time price outcome is available yet.
Research patterns
- First purchase in 12M
- 0/6
- Large purchase ≥ $100k
- 7/7
- Cluster buying · 15D
- 2/7
- Buying the dip
- 0/—
Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.
Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.