Winston J. Churchill is Director at AMKOR TECHNOLOGY, INC. (AMKR). They have made 84 open-market trades across 10 companies since 2007, most recently 2026-07-30.
CIK 0000923792
21 open-market purchases totalling $4.5M since 2007, against 63 sales. Across 9 scored buys the stock is up 1.1% at ninety days, and 2.3 points behind the S&P over the same stretch.
9 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 11% | 67% | 67% |
| Avg Move | -0.7% | +0.1% | +1.1% |
| Alpha | +2.0% | -0.6% | -2.3% |
| Scored | 9 | 9 | 9 |
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 100% | 83% | 83% |
| Avg Move | -8.7% | -10.8% | -36.6% |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMKR | SELL | 2026-06-12 | 2026-06-16 | $78.20 | $391K | -9.2% | -30.5% | -48.0% |
| AMKR | SELL | 2026-05-05 | 2026-05-07 | $76.45 | $535K | -11.9% | -8.2% | -27.6% |
| AMKR | SELL | 2025-12-15 | 2025-12-17 | $44.29 | $221K | -0.9% | +17.7% | +13.6% |
| AMKR | SELL | 2024-08-27 | 2024-08-29 | $32.97 | $659K | -10.1% | -8.7% | -22.4% |
| AMKR | SELL | 2024-03-07 | 2024-03-08 | $36.20 | $862K | -6.9% | -7.7% | -2.9% |
| SCTL | BUY | 2023-08-28 | 2023-08-28 | $0.40 | $25K | +28.5% | -2.1% | -18.3% |
| ISSC | SELL | 2023-06-13 | 2023-06-14 | $6.90 | $24K | -3.9% | +6.1% | +2.8% |
| ISSC | SELL | 2023-06-05 | 2023-06-06 | $6.90 | $11K | +8.3% | +5.9% | +19.0% |
| ISSC | SELL | 2023-05-17 | 2023-05-30 | $7.00 | $9K | -2.4% | +1.2% | +18.9% |
| AMKR | SELL | 2023-02-16 | 2023-02-17 | $27.29 | $546K | +0.8% | -3.4% | -11.3% |
| AMKR | SELL | 2022-12-07 | 2022-12-09 | $26.00 | $520K | -2.2% | +15.9% | +1.0% |
| AMKR | SELL | 2021-11-29 | 2021-12-01 | $22.42 | $897K | +3.0% | +14.0% | -1.4% |
| BXRX | BUY | 2021-08-31 | 2021-08-31 | $0.63 | $63K | -3.2% | -19.2% | -43.4% |
| BXRX | BUY | 2021-06-07 | 2021-06-08 | $0.78 | $20K | -3.7% | -16.4% | -12.7% |
| ISSC | SELL | 2021-06-01 | 2021-06-03 | $5.52 | $55K | +2.8% | +13.9% | +19.4% |
| AMKR | SELL | 2021-05-25 | 2021-05-26 | $20.66 | $666K | +8.1% | +12.5% | +22.7% |
| ISSC | SELL | 2021-03-10 | 2021-03-11 | $6.01 | $301K | -2.1% | +4.0% | -2.1% |
| AMKR | SELL | 2021-02-12 | 2021-02-16 | $24.21 | $397K | -1.8% | -5.0% | -20.6% |
| ISSC | SELL | 2020-12-16 | 2020-12-17 | $7.85 | $411K | -11.6% | -13.2% | -17.4% |
| ISSC | SELL | 2020-05-21 | 2020-05-27 | $5.04 | $173K | +6.3% | -2.7% | +37.3% |
| BXRX | BUY | 2020-03-26 | 2020-03-30 | $2.41 | $76K | -2.2% | +32.3% | +77.2% |
| ISSC | SELL | 2020-02-24 | 2020-02-25 | $6.04 | $411K | -11.1% | -46.6% | -15.6% |
| AMKR | SELL | 2020-02-21 | 2020-02-24 | $12.64 | $59K | -8.0% | -26.4% | -7.1% |
| AMKR | SELL | 2019-02-19 | 2019-02-20 | $9.42 | $329K | -4.6% | -8.6% | -26.0% |
| AMKR | SELL | 2018-03-09 | 2018-03-12 | $11.36 | $682K | -6.0% | -14.4% | -22.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
| VTRQ |
| 942,088 |
| — |
| AUXL | 165,848 | — |
| CYLU | 1,372,277 | — |
| MKTS | 110,000 | — |
| RODM | 75,000 | — |
| Total | $2.3M |
Shares reported on the most recent Form 4, priced at the 2026-07-31 close. 5 holdings could not be priced and are excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Scored | 6 | 6 | 6 |