John Charles Stone

Insider

First SEC filing: July 17, 2013 · Latest: July 17, 2013

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

AMKR selling Nov. 19, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 75 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

75 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 11, 2022	AMKR	F	455	$20.90	$9,510	31,038 Direct	-1.44%	Disposed	141.9% (price as of 2026-08-20)
Dec. 21, 2021	AMKR	F	59	$22.60	$1,333	31,493 Direct	-0.19%	Disposed	123.7% (price as of 2026-08-20)
Nov. 19, 2021	AMKR	M	9,375	—	—	46,875 Direct	-16.67%	Disposed	(price as of 2026-08-20)
Nov. 19, 2021	AMKR	S 10b5-1	9,375	$25.00	$234,375	31,552 Direct	-22.91%	Disposed	102.2% (price as of 2026-08-20)
Nov. 19, 2021	AMKR	M	9,375	$9.48	$88,875	40,927 Direct	+29.71%	Acquired	433.3% (price as of 2026-08-20)
Aug. 26, 2021	AMKR	M	9,375	—	—	56,250 Direct	-14.29%	Disposed	(price as of 2026-08-20)
Aug. 26, 2021	AMKR	S	9,375	$26.30	$246,562	31,552 Direct	-22.91%	Disposed	92.2% (price as of 2026-08-20)
Aug. 26, 2021	AMKR	M	9,375	$9.48	$88,875	40,927 Direct	+29.71%	Acquired	433.3% (price as of 2026-08-20)
June 25, 2021	AMKR	M	9,375	$9.48	$88,875	40,927 Direct	+29.71%	Acquired	433.3% (price as of 2026-08-20)
June 25, 2021	AMKR	S 10b5-1	9,375	$24.00	$225,000	31,552 Direct	-22.91%	Disposed	110.7% (price as of 2026-08-20)
June 25, 2021	AMKR	M	9,375	—	—	65,625 Direct	-12.50%	Disposed	(price as of 2026-08-20)
March 18, 2021	AMKR	M	9,375	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 18, 2021	AMKR	S 10b5-1	9,375	$24.00	$225,000	31,552 Direct	-22.91%	Disposed	110.7% (price as of 2026-08-20)
March 18, 2021	AMKR	M	9,375	$9.86	$92,438	40,927 Direct	+29.71%	Acquired	412.8% (price as of 2026-08-20)
Feb. 16, 2021	AMKR	M	9,375	—	—	75,000 Direct	-11.11%	Disposed	(price as of 2026-08-20)
Feb. 16, 2021	AMKR	S	9,375	$25.23	$236,531	31,552 Direct	-22.91%	Disposed	100.4% (price as of 2026-08-20)
Feb. 16, 2021	AMKR	M	9,375	$9.48	$88,875	40,927 Direct	+29.71%	Acquired	433.3% (price as of 2026-08-20)
Feb. 11, 2021	AMKR	A	6,536	—	—	31,552 Direct	+26.13%	Acquired	(price as of 2026-08-20)
Feb. 11, 2021	AMKR	M	18,750	—	—	9,375 Direct	-66.67%	Disposed	(price as of 2026-08-20)
Feb. 11, 2021	AMKR	M	65,625	—	—	84,375 Direct	-43.75%	Disposed	(price as of 2026-08-20)
Feb. 11, 2021	AMKR	S	18,750	$21.35	$400,312	25,016 Direct	-42.84%	Disposed	136.8% (price as of 2026-08-20)
Feb. 11, 2021	AMKR	M	18,750	$9.86	$184,875	43,766 Direct	+74.95%	Acquired	412.8% (price as of 2026-08-20)
Feb. 11, 2021	AMKR	S	65,625	$21.35	$1,401,094	25,016 Direct	-72.40%	Disposed	136.8% (price as of 2026-08-20)
Feb. 11, 2021	AMKR	M	65,625	$9.48	$622,125	90,641 Direct	+262.33%	Acquired	433.3% (price as of 2026-08-20)
Dec. 3, 2020	AMKR	M	28,125	—	—	28,125 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Dec. 3, 2020	AMKR	S 10b5-1	28,125	$15.25	$428,906	25,016 Direct	-52.93%	Disposed	231.5% (price as of 2026-08-20)
Dec. 3, 2020	AMKR	M	28,125	$9.86	$277,312	53,141 Direct	+112.43%	Acquired	412.8% (price as of 2026-08-20)
Nov. 1, 2019	AMKR	M	61,104	—	—	56,250 Direct	-52.07%	Disposed	(price as of 2026-08-20)
Nov. 1, 2019	AMKR	S	61,104	$12.78	$780,909	25,016 Direct	-70.95%	Disposed	295.6% (price as of 2026-08-20)
Nov. 1, 2019	AMKR	M	61,104	$9.86	$602,485	86,120 Direct	+244.26%	Acquired	412.8% (price as of 2026-08-20)
Nov. 1, 2019	AMKR	M	61,104	—	—	56,250 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 1, 2019	AMKR	S	61,104	$12.78	$780,909	25,016 Direct	-70.95%	Disposed	295.6% (price as of 2026-08-20)
Nov. 1, 2019	AMKR	M	61,104	$9.86	$602,485	86,120 Direct	+244.26%	Acquired	412.8% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	M	32,646	—	—	117,354 Direct	-21.76%	Disposed	(price as of 2026-08-20)
Oct. 31, 2019	AMKR	S	4,706	$13.72	$64,566	25,016 Direct	-15.83%	Disposed	268.5% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	S	32,646	$13.40	$437,456	29,722 Direct	-52.34%	Disposed	277.3% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	M	32,646	$9.86	$321,890	62,368 Direct	+109.84%	Acquired	412.8% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	M	32,646	—	—	117,354 Direct	+38.54%	Acquired	(price as of 2026-08-20)
Oct. 31, 2019	AMKR	S	4,706	$13.72	$64,566	25,016 Direct	-15.83%	Disposed	268.5% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	S	32,646	$13.40	$437,456	29,722 Direct	-52.34%	Disposed	277.3% (price as of 2026-08-20)
Oct. 31, 2019	AMKR	M	32,646	$9.86	$321,890	62,368 Direct	+109.84%	Acquired	412.8% (price as of 2026-08-20)
March 15, 2019	AMKR	M	4,000	—	—	0 Direct	—	Acquired	(price as of 2026-08-20)
March 15, 2019	AMKR	S	4,000	$8.81	$35,240	29,722 Direct	-11.86%	Disposed	473.9% (price as of 2026-08-20)
March 15, 2019	AMKR	M	4,000	$4.28	$17,120	33,722 Direct	+13.46%	Acquired	1081.3% (price as of 2026-08-20)
March 14, 2019	AMKR	M	21,000	—	—	4,000 Direct	—	Acquired	(price as of 2026-08-20)
March 14, 2019	AMKR	S	21,000	$8.61	$180,810	29,722 Direct	-41.40%	Disposed	487.2% (price as of 2026-08-20)
March 14, 2019	AMKR	M	21,000	$4.28	$89,880	50,722 Direct	+70.65%	Acquired	1081.3% (price as of 2026-08-20)
Feb. 15, 2019	AMKR	A	150,000	—	—	150,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 27, 2017	AMKR	A	150,000	—	—	150,000 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 22, 2016	AMKR	M	25,000	—	—	25,000 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Nov. 21, 2016	AMKR	S	25,000	$12.35	$308,750	29,722 Direct	-45.69%	Disposed	309.4% (price as of 2026-08-20)
Nov. 21, 2016	AMKR	M	25,000	$4.28	$107,000	54,722 Direct	+84.11%	Acquired	1081.3% (price as of 2026-08-20)
Nov. 18, 2016	AMKR	M	50,000	—	—	50,000 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Nov. 18, 2016	AMKR	S	50,000	$12.13	$606,500	29,722 Direct	-62.72%	Disposed	316.8% (price as of 2026-08-20)
Nov. 18, 2016	AMKR	M	50,000	$4.28	$214,000	79,722 Direct	+168.23%	Acquired	1081.3% (price as of 2026-08-20)
Nov. 8, 2016	AMKR	M	30,000	$8.67	$260,100	59,722 Direct	+100.94%	Acquired	483.2% (price as of 2026-08-20)
Nov. 8, 2016	AMKR	S	30,000	$11.01	$330,300	29,722 Direct	-50.23%	Disposed	359.2% (price as of 2026-08-20)
Nov. 8, 2016	AMKR	M	30,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 1, 2016	AMKR	F	313	$10.23	$3,202	29,722 Direct	-1.04%	Disposed	394.2% (price as of 2026-08-20)
Sept. 7, 2016	AMKR	M	6,600	—	—	30,000 Direct	-18.03%	Disposed	(price as of 2026-08-20)
Sept. 7, 2016	AMKR	S	6,600	$9.25	$61,050	6,600 Direct	-50.00%	Disposed	446.6% (price as of 2026-08-20)
Sept. 7, 2016	AMKR	M	6,600	$8.67	$57,222	6,600 Direct	—	Acquired	483.2% (price as of 2026-08-20)
Sept. 2, 2016	AMKR	M	3,400	—	—	36,600 Direct	-8.50%	Disposed	(price as of 2026-08-20)
Sept. 2, 2016	AMKR	S	3,400	$9.25	$31,450	3,400 Direct	-50.00%	Disposed	446.6% (price as of 2026-08-20)
Sept. 2, 2016	AMKR	M	3,400	$8.67	$29,478	3,400 Direct	—	Acquired	483.2% (price as of 2026-08-20)
Aug. 1, 2016	AMKR	F	313	$6.45	$2,019	30,035 Direct	-1.03%	Disposed	683.9% (price as of 2026-08-20)
May 1, 2016	AMKR	F	313	$5.71	$1,787	30,348 Direct	-1.02%	Disposed	785.5% (price as of 2026-08-20)
Feb. 1, 2016	AMKR	F	363	$5.93	$2,153	30,661 Direct	-1.17%	Disposed	752.6% (price as of 2026-08-20)
Nov. 1, 2015	AMKR	F	313	$6.22	$1,947	31,024 Direct	-1.00%	Disposed	712.9% (price as of 2026-08-20)
Aug. 1, 2015	AMKR	F	313	$4.41	$1,380	31,337 Direct	-0.99%	Disposed	1046.5% (price as of 2026-08-20)
May 1, 2015	AMKR	F	313	$7.16	$2,241	31,650 Direct	-0.98%	Disposed	606.1% (price as of 2026-08-20)
Feb. 14, 2015	AMKR	F	363	$8.92	$3,238	31,963 Direct	-1.12%	Disposed	466.8% (price as of 2026-08-20)
Feb. 1, 2015	AMKR	F	363	$6.35	$2,305	32,326 Direct	-1.11%	Disposed	696.2% (price as of 2026-08-20)
Nov. 25, 2014	AMKR	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 25, 2014	AMKR	S	15,294	$6.94	$106,140	32,689 Direct	-31.87%	Disposed	628.5% (price as of 2026-08-20)
Nov. 25, 2014	AMKR	M	20,000	$4.41	$88,200	47,983 Direct	+71.47%	Acquired	1046.5% (price as of 2026-08-20)
Nov. 14, 2014	AMKR	F	313	$6.39	$2,000	27,983 Direct	-1.11%	Disposed	691.2% (price as of 2026-08-20)
Nov. 1, 2014	AMKR	F	313	$6.78	$2,122	28,296 Direct	-1.09%	Disposed	645.7% (price as of 2026-08-20)
Aug. 14, 2014	AMKR	F	313	$9.33	$2,920	28,609 Direct	-1.08%	Disposed	441.9% (price as of 2026-08-20)
Aug. 1, 2014	AMKR	F	313	$9.07	$2,839	28,922 Direct	-1.07%	Disposed	457.4% (price as of 2026-08-20)
June 6, 2014	AMKR	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 6, 2014	AMKR	S	20,000	$10.91	$218,200	29,235 Direct	-40.62%	Disposed	363.4% (price as of 2026-08-20)
June 6, 2014	AMKR	M	20,000	$5.71	$114,200	49,235 Direct	+68.41%	Acquired	785.5% (price as of 2026-08-20)
May 14, 2014	AMKR	F	313	$9.13	$2,858	29,235 Direct	-1.06%	Disposed	453.8% (price as of 2026-08-20)
May 1, 2014	AMKR	F	313	$8.11	$2,538	29,548 Direct	-1.05%	Disposed	523.4% (price as of 2026-08-20)
Feb. 14, 2014	AMKR	F	363	$5.27	$1,913	29,861 Direct	-1.20%	Disposed	859.4% (price as of 2026-08-20)
Feb. 3, 2014	AMKR	F	41	$5.24	$215	30,224 Direct	-0.14%	Disposed	864.9% (price as of 2026-08-20)
Feb. 1, 2014	AMKR	F	363	$5.30	$1,924	30,265 Direct	-1.19%	Disposed	854.0% (price as of 2026-08-20)
Jan. 3, 2014	AMKR	F	41	$6.12	$251	30,628 Direct	-0.13%	Disposed	726.1% (price as of 2026-08-20)
Dec. 3, 2013	AMKR	F	35	$5.86	$205	30,669 Direct	-0.11%	Disposed	762.8% (price as of 2026-08-20)
Nov. 14, 2013	AMKR	F	313	$5.45	$1,706	30,704 Direct	-1.01%	Disposed	827.7% (price as of 2026-08-20)
Nov. 3, 2013	AMKR	F	35	$5.32	$186	31,017 Direct	-0.11%	Disposed	850.4% (price as of 2026-08-20)
Nov. 1, 2013	AMKR	F	1,251	$5.32	$6,655	31,052 Direct	-3.87%	Disposed	850.4% (price as of 2026-08-20)
Oct. 3, 2013	AMKR	F	35	$4.42	$155	32,303 Direct	-0.11%	Disposed	1043.9% (price as of 2026-08-20)
Sept. 9, 2013	AMKR	A	100,000	—	—	100,000 Direct	—	Acquired	(price as of 2026-08-20)
Sept. 3, 2013	AMKR	F	35	$4.10	$144	32,338 Direct	-0.11%	Disposed	1133.2% (price as of 2026-08-20)
Aug. 14, 2013	AMKR	F	313	$4.25	$1,330	32,373 Direct	-0.96%	Disposed	1089.6% (price as of 2026-08-20)
Aug. 3, 2013	AMKR	F	36	$4.22	$152	32,686 Direct	-0.11%	Disposed	1098.1% (price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Nov. 19, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (9,375)	$9.48	Feb. 15, 2029	9,375	Disposed
Aug. 26, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (9,375)	$9.48	Feb. 15, 2029	9,375	Disposed
June 25, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (9,375)	$9.48	Feb. 15, 2029	9,375	Disposed
March 18, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (9,375)	$9.86	Feb. 27, 2027	9,375	Disposed
Feb. 16, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (9,375)	$9.48	Feb. 15, 2029	9,375	Disposed
Feb. 11, 2021	AMKR	Employee Stock Option (Right-To-Buy)	Common Stock (18,750)	$9.86	Feb. 27, 2027	18,750	Disposed
Feb. 11, 2021	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (65,625)	$9.48	Feb. 15, 2029	65,625	Disposed
Dec. 3, 2020	AMKR	Employee Stock Option (Right-to-Buy)	Common Stock (28,125)	$9.86	Feb. 27, 2027	28,125	Disposed
Nov. 1, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc., Common Stock (61,104)	$9.86	Feb. 27, 2027	61,104	Disposed
Nov. 1, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc., Common Stock (61,104)	$9.86	Feb. 27, 2027	61,104	Acquired
Oct. 31, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc. Common Stock (32,646)	$9.86	Feb. 27, 2027	32,646	Disposed
Oct. 31, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc. Common Stock (32,646)	$9.86	Feb. 27, 2027	32,646	Acquired
March 15, 2019	AMKR	Employee Stock (Right To Buy)	Amkor Technology, Inc. (4,000)	$4.28	Sept. 9, 2023	4,000	Acquired
March 14, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc., Common Stock (21,000)	$4.28	Sept. 9, 2023	21,000	Acquired
Feb. 15, 2019	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc., Common Stock (150,000)	$9.48	Feb. 15, 2029	150,000	Acquired
Feb. 27, 2017	AMKR	Employee Stock Option (Right-to-Buy)	Amkor Technology, Inc., Common Stock (150,000)	$9.86	Feb. 27, 2027	150,000	Acquired
Nov. 22, 2016	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (25,000)	$4.28	Sept. 9, 2023	25,000	Disposed
Nov. 18, 2016	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (50,000)	$4.28	Sept. 9, 2023	50,000	Disposed
Nov. 8, 2016	AMKR	Employee Stock Option (Right to Buy)	Amkor Technoloby, Inc. (30,000)	$8.67	Dec. 14, 2017	30,000	Disposed
Sept. 7, 2016	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (6,600)	$8.67	Dec. 14, 2017	6,600	Disposed
Sept. 2, 2016	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (3,400)	$8.67	Dec. 14, 2017	3,400	Disposed
Nov. 25, 2014	AMKR	Employee Stock Option (right to Buy)	Amkor Technology, Inc. (20,000)	$4.41	Feb. 18, 2015	20,000	Disposed
June 6, 2014	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (20,000)	$5.71	Oct. 27, 2014	20,000	Disposed
Sept. 9, 2013	AMKR	Employee Stock Option (Right to Buy)	Amkor Technology, Inc. (100,000)	$4.28	Sept. 9, 2023	100,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 6 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
July 17, 2013	AMKR	Amkor Technology, Inc. Common Stock	—	Direct
July 17, 2013	AMKR	Amkor Technology, Inc. Common Stock	2,000	Indirect
July 17, 2013	AMKR	Employee Stock Option (Right to Buy)→ Amkor Technology Inc, Common Stock (20,000)	20,000	Direct
July 17, 2013	AMKR	Employee Stock Option (Right to Buy)→ Amkor Technology Inc, Common Stock (20,000)	20,000	Direct
July 17, 2013	AMKR	Employee Stock Option (Right to Buy)→ Amkor Technology Inc, Common Stock (8,000)	8,000	Direct
July 17, 2013	AMKR	Employee Stock Option (Right to Buy)→ Amkor Technology Inc, Common Stock (40,000)	40,000	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

AMKR

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2021	$570,000	—	—	—	$641,250	—	$11,953	$1,813,535
2020	$571,154	—	—	—	$618,750	—	$12,759	$1,202,663
2019	$550,000	—	—	$624,270	$433,125	—	$11,916	$1,619,311

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.