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Insider Trading Intelligence
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WC

Winston J. Churchill

AMKR
DIRECTOR · AMKOR TECHNOLOGY, INC. · CIK 0000923792
FILING MIX · LIFETIME51%/49%
BUYS
42
SELLS
41
TOTAL VALUE
$6.65M
COMPANIES
2
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
12,139
AVG SELL PX
$18.15
TRADE KIND
SHOWING 83 / 83
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
29 backtested trades · 8 horizons · 7 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Winston J. Churchill, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d29+68.97%-2.81%+0.07%-2.88%-4.15%—
14d29+62.07%-2.88%+0.32%-2.81%-1.88%—
30d29+41.38%-1.28%+0.58%-1.84%-2.10%—
60d29+44.83%+1.61%+3.91%-2.30%-5.77%—
90d29(1 pending)+42.86%+6.93%+5.49%+1.44%+5.95%—
180d29(1 pending)+28.57%+12.73%+11.13%+1.60%+2.35%—
1y29(2 pending)+51.85%+9.28%+20.02%-10.74%-11.66%—
2y29(3 pending)+7.69%+42.98%+26.25%+16.73%+16.94%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
AMKR · 2,615.517 shares · as of Jun 23, 2026
09,96819,93629,90339,871202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 42 buys / 41 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
2.517——2,615.517Jun 23, 2026Jun 25, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
5,000$19.39$97.0K33,781Jun 12, 2026Jun 16, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
5,000——10,000Jun 12, 2026Jun 16, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
5,000$78.20$391.0K28,781Jun 12, 2026Jun 16, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
9,893——28,781May 13, 2026May 15, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
9,893.057——0May 13, 2026May 15, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
2,613——2,613May 13, 2026May 15, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
7,000$76.45$535.1K18,888May 5, 2026May 7, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
18.156——9,893.057Mar 31, 2026Apr 2, 2026 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
20.009——9,874.901Dec 23, 2025Dec 26, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
5,000$44.29$221.4K25,888Dec 15, 2025Dec 17, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
5,000——15,000Dec 15, 2025Dec 17, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
5,000$19.39$97.0K30,888Dec 15, 2025Dec 17, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
27.365——9,854.892Sep 23, 2025Sep 25, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
38.527——9,827.527Jun 25, 2025Jun 27, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
9,789——9,789May 15, 2025May 16, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
6,017.034——0May 14, 2025May 16, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
6,017——25,888May 14, 2025May 16, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
25.988——6,017.034Apr 2, 2025Apr 4, 2025 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
108.798——5,991.047Dec 23, 2024Dec 26, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
14.864——5,882.249Sep 23, 2024Sep 25, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
20,000$11.71$234.2K39,871Aug 27, 2024Aug 29, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000$32.97$659.4K19,871Aug 27, 2024Aug 29, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000——0Aug 27, 2024Aug 29, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
12.385——5,867.385Jun 24, 2024Jun 26, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
8,571——19,871May 14, 2024May 16, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
8,571.042——0May 14, 2024May 16, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
5,855——5,855May 14, 2024May 16, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
20.988——8,571.042Apr 1, 2024Apr 3, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
11,903$36.20$430.9K11,300Mar 7, 2024Mar 8, 2024 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
19.533——8,550.054Dec 26, 2023Dec 27, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
28.399——8,530.521Sep 25, 2023Sep 27, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
24.122——8,502.122Jun 26, 2023Jun 28, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
3,499$6.90$24.1K9,523Jun 13, 2023Jun 14, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
14$6.90$9713,022Jun 6, 2023Jun 6, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
1,556$6.90$10.7K13,036Jun 5, 2023Jun 6, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
900$7.00$6.3K14,592May 19, 2023May 30, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
80$7.00$56015,492May 18, 2023May 30, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
300$7.00$2.1K15,572May 17, 2023May 30, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
8,809——23,203May 16, 2023May 18, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
8,478——8,478May 16, 2023May 18, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
8,809.408——0May 16, 2023May 18, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
PURCHASEGRANT
Stock grant
1,742——15,872Apr 18, 2023Apr 20, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
26.108——8,809.408Mar 20, 2023Mar 22, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000——0Feb 16, 2023Feb 17, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
20,000$8.51$170.2K34,394Feb 16, 2023Feb 17, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000$27.29$545.8K14,394Feb 16, 2023Feb 17, 2023 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
PURCHASEGRANT
Stock grant
6,088——14,130Jan 3, 2023Jan 5, 2023 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
26.76——8,783.3Dec 27, 2022Dec 29, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000——0Dec 7, 2022Dec 9, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000$26.00$520.0K14,394Dec 7, 2022Dec 9, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
20,000$9.17$183.4K34,394Dec 7, 2022Dec 9, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
25.988——8,756.54Sep 26, 2022Sep 28, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
24.552——8,730.552Jun 27, 2022Jun 29, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
8,706——23,100May 17, 2022May 19, 2022 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
PURCHASEGRANT
Stock grant
6,349——8,042Jan 3, 2022Jan 4, 2022 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000——0Nov 29, 2021Dec 1, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000$22.42$448.4K14,394Nov 29, 2021Dec 1, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
20,000$7.31$146.2K34,394Nov 29, 2021Dec 1, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
2,700$5.54$15.0K1,693Jun 2, 2021Jun 3, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
7,300$5.51$40.2K4,393Jun 1, 2021Jun 3, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000——0May 25, 2021May 26, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASE
20,000$9.83$196.5K34,394May 25, 2021May 26, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
6,106$20.67$126.2K14,394May 25, 2021May 26, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
20,000$20.66$413.2K14,394May 25, 2021May 26, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 18, 2021May 19, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
3,094——20,500May 18, 2021May 19, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
200$6.36$1.3K36,629Mar 10, 2021Mar 11, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
24,936$6.01$149.9K11,693Mar 10, 2021Mar 11, 2021 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
8,207$24.21$198.7K17,406Feb 12, 2021Feb 16, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
PURCHASEGRANT
Stock grant
6,872——36,829Jan 4, 2021Jan 6, 2021 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
15,202$7.76$117.9K29,957Dec 17, 2020Dec 17, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
10,251$7.99$81.9K46,559Dec 16, 2020Dec 17, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
1,400$7.76$10.9K45,159Dec 16, 2020Dec 17, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
3,673$5.03$18.5K56,810May 27, 2020May 27, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
14,327$5.04$72.2K60,483May 26, 2020May 27, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
1,700$5.03$8.5K74,810May 22, 2020May 27, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
300$5.00$1.5K76,510May 21, 2020May 27, 2020 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
6,106——25,613May 19, 2020May 20, 2020 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 19, 2020May 20, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
SALE
68,000$6.04$410.4K76,810Feb 24, 2020Feb 25, 2020 ↗View →
AMKR
AMKOR TECHNOLOGY, INC.
SALE
4,700$12.64$59.4K19,507Feb 21, 2020Feb 24, 2020 ↗View →
ISSC
INNOVATIVE SOLUTIONS & SUPPORT INC
PURCHASEGRANT
Stock grant
18,264——144,810Jan 2, 2020Jan 6, 2020 ↗View →
Other insiders · AMKR
Loading peer insiders…
About this filer
CIK 0000923792
ROLE
Director
PRIMARY
AMKR
COMPANIES
2
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0000923792DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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