Prahlad R. Singh is President & COO at PERKINELMER INC (PKI). They have made 5 open-market trades across 2 companies since 2017, most recently 2026-08-13.
CIK 0001684136
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.
0 open-market purchases, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| PKI | 83,016 | $9.6M |
| RVTY | 54,219 | $8.3M |
| APH | 1,552 | $123K |
| Total | $18.0M |
Shares reported on the most recent Form 4, priced at the 2026-08-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| RVTY | SELL | 2026-02-05 | 2026-02-06 | $100.21 | $2.6M | -1.2% | -9.0% | -2.3% |
| RVTY | SELL · 10b5-1 | 2024-12-02 | 2024-12-03 | $116.22 | $4.3M | +1.3% | -2.2% | -3.6% |
| RVTY | SELL · 10b5-1 | 2024-02-23 | 2024-02-26 | $105.13 | $241K | +3.6% | +0.6% | +6.8% |
| RVTY | SELL · 10b5-1 | 2024-02-05 | 2024-02-07 | $104.28 | $4.4M | -0.1% | +7.1% | +1.0% |
| PKI | SELL | 2022-12-21 | 2022-12-23 | $140.52 | $4.0M | -4.8% | +0.4% | -10.8% |
| PKI | SELL | 2021-01-05 | 2021-01-07 | $150.00 | $1.6M | -5.8% | -10.0% | -18.9% |
| PKI | SELL | 2019-04-09 | 2019-04-10 | $102.39 | $674K | -6.1% | -8.5% | -4.7% |
| PKI | SELL | 2017-02-15 | 2017-02-16 | $55.00 | $527K | +0.2% | +3.6% | +11.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.