Gregory L. Summe is Chairman at PERKINELMER INC (PKI). They have made 17 open-market trades across 7 companies since 2007, most recently 2026-07-15.
CIK 0001143422
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
10 open-market purchases totalling $7.1M since 2011, against 7 sales. Across 10 scored buys the stock is down 6.3% at ninety days, and 12.0 points behind the S&P over the same stretch.
10 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 20% | 50% | 40% |
| Avg Move | -3.8% | -2.2% | -6.3% |
| Alpha | -3.7% | -4.3% | -12.0% |
| Scored | 10 | 10 | 10 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AVTR | BUY | 2026-02-12 | 2026-02-12 | $9.40 | $940K | -4.8% | -20.1% | -17.3% |
| AVTR | BUY | 2025-10-30 | 2025-10-31 | $11.25 | $1.1M | -1.8% | -0.1% | -8.1% |
| AVTR | BUY | 2025-08-21 | 2025-08-22 | $12.56 | $1.3M | -5.5% | -10.8% | -21.3% |
| AVTR | BUY | 2025-05-23 | 2025-05-27 | $12.50 | $375K | -0.2% | +4.9% | +0.8% |
| AVTR | BUY | 2025-05-22 | 2025-05-22 | $12.65 | $253K | +5.4% | +6.3% | +2.0% |
| AVTR | BUY | 2025-05-07 | 2025-05-09 | $12.00 | $300K | +0.4% | +7.6% | -9.0% |
| AVTR | BUY | 2025-04-28 | 2025-04-29 | $12.50 | $313K | -5.6% | +2.4% | +9.9% |
| STT | SELL | 2025-02-18 | 2025-02-19 | $100.00 | $1.4M | -3.2% | -9.6% | -2.5% |
| NXPI | SELL | 2024-02-28 | 2024-02-29 | $245.27 | $3.0M | +2.2% | -2.2% | +8.7% |
| STT | BUY | 2019-05-07 | 2019-05-09 | $64.50 | $194K | -7.3% | -11.3% | -18.6% |
| LMIA | SELL | 2017-06-27 | 2017-06-28 | $14.00 | $20.2M | N/A | N/A | N/A |
| RM | SELL | 2016-07-27 | 2016-07-29 | $18.87 | $4.7M | +3.0% | +9.0% | +14.8% |
| LMIA | BUY | 2015-06-02 | 2015-06-03 | $10.00 | $2.0M | -6.4% | -2.1% | -2.1% |
| ADP | SELL | 2013-11-25 | 2013-11-25 | $80.04 | $1.2M | -6.7% | -1.0% | -1.0% |
| STT | BUY | 2011-08-19 | 2011-08-23 | $31.99 | $320K | -12.2% | +0.7% | +0.7% |
| PKI | SELL | 2009-02-27 | 2009-03-03 | $13.02 | $1.7M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-08-08 | 2008-08-12 | $29.50 | $8.3M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-08-06 | 2008-08-08 | $29.50 | $788K | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-07-31 | 2008-08-01 | $29.50 | $457K | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-07-29 | 2008-07-31 | $28.60 | $17.9M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-04-30 | 2008-05-02 | $27.00 | $5.0M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-04-29 | 2008-05-01 | $26.13 | $2.0M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-04-29 | 2008-05-01 | $26.58 | $1.9M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-04-29 | 2008-05-01 | $26.48 | $1.2M | -10.8% | -0.7% | -0.7% |
| PKI | SELL · 10b5-1 | 2008-04-29 | 2008-05-01 | $26.81 | $1.2M | -10.8% | -0.7% | -0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
| VORB |
| 8,799,864 |
| $677K |
| LMIA | 17,550 | $246K |
| UP | 36,090 | $124K |
| FSL | 12,444 | — |
| Total | $99.9M |
Shares reported on the most recent Form 4, priced at the 2026-07-16 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.