Stephen B. Shohet

Insider

First SEC filing: June 24, 2014 · Latest: June 24, 2014

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.

Insider at

AMPH selling Dec. 10, 2018

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 44 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

44 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Dec. 10, 2018	AMPH	M	58,557	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 10, 2018	AMPH	S	58,557	$21.72	$1,271,858	30,706 Direct	-65.60%	Disposed	-1.6% (price as of 2026-08-20)
Dec. 10, 2018	AMPH	M	58,557	$14.66	$858,446	89,263 Direct	+190.70%	Acquired	45.8% (price as of 2026-08-20)
June 7, 2018	AMPH	A	16,679	—	—	16,679 Direct	—	Acquired	(price as of 2026-08-20)
June 7, 2018	AMPH	A	6,590	—	—	30,706 Direct	+27.33%	Acquired	(price as of 2026-08-20)
Dec. 14, 2017	AMPH	M	7,866	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 14, 2017	AMPH	S 10b5-1	7,866	$18.87	$148,431	24,116 Direct	-24.60%	Disposed	13.3% (price as of 2026-08-20)
Dec. 14, 2017	AMPH	M	7,866	$10.77	$84,717	31,982 Direct	+32.62%	Acquired	98.5% (price as of 2026-08-20)
Dec. 7, 2017	AMPH	M	7,862	—	—	7,866 Direct	-49.99%	Disposed	(price as of 2026-08-20)
Dec. 7, 2017	AMPH	S 10b5-1	7,862	$18.34	$144,189	24,116 Direct	-24.59%	Disposed	16.6% (price as of 2026-08-20)
Dec. 7, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Nov. 30, 2017	AMPH	M	7,862	—	—	15,728 Direct	-33.33%	Disposed	(price as of 2026-08-20)
Nov. 30, 2017	AMPH	S 10b5-1	7,862	$19.25	$151,344	24,116 Direct	-24.59%	Disposed	11.1% (price as of 2026-08-20)
Nov. 30, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Nov. 22, 2017	AMPH	M	7,862	—	—	23,590 Direct	-25.00%	Disposed	(price as of 2026-08-20)
Nov. 22, 2017	AMPH	S 10b5-1	7,862	$18.94	$148,906	24,116 Direct	-24.59%	Disposed	12.9% (price as of 2026-08-20)
Nov. 22, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Nov. 16, 2017	AMPH	M	7,862	—	—	31,452 Direct	-20.00%	Disposed	(price as of 2026-08-20)
Nov. 16, 2017	AMPH	S 10b5-1	7,862	$18.04	$141,830	24,116 Direct	-24.59%	Disposed	18.5% (price as of 2026-08-20)
Nov. 16, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Nov. 9, 2017	AMPH	M	7,862	—	—	39,314 Direct	-16.67%	Disposed	(price as of 2026-08-20)
Nov. 9, 2017	AMPH	S 10b5-1	100	$19.06	$1,906	24,116 Direct	-0.41%	Disposed	12.2% (price as of 2026-08-20)
Nov. 9, 2017	AMPH	S 10b5-1	6,962	$18.66	$129,911	24,216 Direct	-22.33%	Disposed	14.6% (price as of 2026-08-20)
Nov. 9, 2017	AMPH	S 10b5-1	800	$17.51	$14,008	31,178 Direct	-2.50%	Disposed	22.1% (price as of 2026-08-20)
Nov. 9, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Nov. 2, 2017	AMPH	M	7,862	—	—	47,176 Direct	-14.28%	Disposed	(price as of 2026-08-20)
Nov. 2, 2017	AMPH	S 10b5-1	7,862	$18.37	$144,425	24,116 Direct	-24.59%	Disposed	16.4% (price as of 2026-08-20)
Nov. 2, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Oct. 26, 2017	AMPH	M	7,862	—	—	55,038 Direct	-12.50%	Disposed	(price as of 2026-08-20)
Oct. 26, 2017	AMPH	S 10b5-1	7,862	$18.39	$144,582	24,116 Direct	-24.59%	Disposed	16.3% (price as of 2026-08-20)
Oct. 26, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Oct. 19, 2017	AMPH	M	7,862	—	—	62,900 Direct	-11.11%	Disposed	(price as of 2026-08-20)
Oct. 19, 2017	AMPH	S 10b5-1	7,862	$18.34	$144,189	24,116 Direct	-24.59%	Disposed	16.6% (price as of 2026-08-20)
Oct. 19, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
Oct. 12, 2017	AMPH	M	7,862	—	—	70,762 Direct	-10.00%	Disposed	(price as of 2026-08-20)
Oct. 12, 2017	AMPH	S 10b5-1	7,862	$18.73	$147,255	24,116 Direct	-24.59%	Disposed	14.1% (price as of 2026-08-20)
Oct. 12, 2017	AMPH	M	7,862	$10.77	$84,674	31,978 Direct	+32.60%	Acquired	98.5% (price as of 2026-08-20)
June 8, 2017	AMPH	A	20,291	—	—	20,291 Direct	—	Acquired	(price as of 2026-08-20)
June 8, 2017	AMPH	A	5,844	—	—	24,116 Direct	+31.98%	Acquired	(price as of 2026-08-20)
Aug. 16, 2016	AMPH	M	10,670	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 16, 2016	AMPH	S	10,670	$18.35	$195,794	18,272 Direct	-36.87%	Disposed	16.5% (price as of 2026-08-20)
Aug. 16, 2016	AMPH	M	10,670	$14.23	$151,834	28,942 Direct	+58.40%	Acquired	50.2% (price as of 2026-08-20)
Aug. 15, 2016	AMPH	M	22,917	—	—	10,670 Direct	-68.23%	Disposed	(price as of 2026-08-20)
Aug. 15, 2016	AMPH	S	22,917	$18.26	$418,464	18,272 Direct	-55.64%	Disposed	17.1% (price as of 2026-08-20)
Aug. 15, 2016	AMPH	M	22,917	$14.23	$326,109	41,189 Direct	+125.42%	Acquired	50.2% (price as of 2026-08-20)
Aug. 12, 2016	AMPH	M	4,407	—	—	33,587 Direct	-11.60%	Disposed	(price as of 2026-08-20)
Aug. 12, 2016	AMPH	M	10,381	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 12, 2016	AMPH	S	14,788	$18.12	$267,959	18,272 Direct	-44.73%	Disposed	18.0% (price as of 2026-08-20)
Aug. 12, 2016	AMPH	M	4,407	$14.23	$62,712	33,060 Direct	+15.38%	Acquired	50.2% (price as of 2026-08-20)
Aug. 12, 2016	AMPH	M	10,381	$15.23	$158,103	28,653 Direct	+56.81%	Acquired	40.4% (price as of 2026-08-20)
June 9, 2016	AMPH	A	25,827	—	—	25,827 Direct	—	Acquired	(price as of 2026-08-20)
June 9, 2016	AMPH	A	6,086	—	—	18,272 Direct	+49.94%	Acquired	(price as of 2026-08-20)
Dec. 17, 2015	AMPH	M	15,191	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 17, 2015	AMPH	S 10b5-1	15,191	$14.19	$215,560	12,186 Direct	-55.49%	Disposed	50.7% (price as of 2026-08-20)
Dec. 17, 2015	AMPH	M	15,191	$11.68	$177,431	27,377 Direct	+124.66%	Acquired	83.0% (price as of 2026-08-20)
Dec. 16, 2015	AMPH	M	15,579	—	—	15,191 Direct	-50.63%	Disposed	(price as of 2026-08-20)
Dec. 16, 2015	AMPH	S 10b5-1	15,579	$14.19	$221,066	12,186 Direct	-56.11%	Disposed	50.7% (price as of 2026-08-20)
Dec. 16, 2015	AMPH	M	15,579	$11.68	$181,963	27,765 Direct	+127.84%	Acquired	83.0% (price as of 2026-08-20)
July 17, 2015	AMPH	M	7,692	—	—	30,770 Direct	-20.00%	Disposed	(price as of 2026-08-20)
July 17, 2015	AMPH	S 10b5-1	7,692	$17.41	$133,918	12,186 Direct	-38.70%	Disposed	22.8% (price as of 2026-08-20)
July 17, 2015	AMPH	M	7,692	$11.68	$89,843	19,878 Direct	+63.12%	Acquired	83.0% (price as of 2026-08-20)
May 27, 2015	AMPH	A	8,686	—	—	12,186 Direct	+248.17%	Acquired	(price as of 2026-08-20)
May 27, 2015	AMPH	A	47,782	—	—	47,782 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 15, 2014	AMPH	P	3,500	$10.37	$36,295	3,500 Direct	—	Acquired	106.2% (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
Dec. 10, 2018	AMPH	Stock Option (right to buy)	Common Stock (58,557)	$14.66	Dec. 20, 2018	58,557	Disposed
June 7, 2018	AMPH	Stock Option (right to buy)	Common Stock (16,679)	$16.69	June 7, 2026	16,679	Acquired
Dec. 14, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,866)	$10.77	Dec. 15, 2017	7,866	Disposed
Dec. 7, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Nov. 30, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Nov. 22, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Nov. 16, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Nov. 9, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Nov. 2, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Oct. 26, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Oct. 19, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
Oct. 12, 2017	AMPH	Stock Option (right to buy)	Common Stock (7,862)	$10.77	Dec. 15, 2017	7,862	Disposed
June 8, 2017	AMPH	Stock Option (right to buy)	Common Stock (20,291)	$17.11	June 8, 2022	20,291	Acquired
Aug. 16, 2016	AMPH	Stock Option (right to buy)	Common Stock (10,670)	$14.23	Dec. 10, 2016	10,670	Disposed
Aug. 15, 2016	AMPH	Stock Option (right to buy)	Common Stock (22,917)	$14.23	Dec. 10, 2016	22,917	Disposed
Aug. 12, 2016	AMPH	Stock Option (right to buy)	Common Stock (4,407)	$14.23	Dec. 10, 2016	4,407	Disposed
Aug. 12, 2016	AMPH	Stock Option (right to buy)	Common Stock (10,381)	$15.23	Oct. 3, 2016	10,381	Disposed
June 9, 2016	AMPH	Stock Option (right to buy)	Common Stock (25,827)	$16.43	June 9, 2021	25,827	Acquired
Dec. 17, 2015	AMPH	Stock Option (right to buy)	Common Stock (15,191)	$11.68	Dec. 18, 2015	15,191	Disposed
Dec. 16, 2015	AMPH	Stock Option (right to buy)	Common Stock (15,579)	$11.68	Dec. 18, 2015	15,579	Disposed
July 17, 2015	AMPH	Stock Option (right to buy)	Common Stock (7,692)	$11.68	Dec. 18, 2015	7,692	Disposed
May 27, 2015	AMPH	Stock Option (right to buy)	Common Stock (47,782)	$15.11	May 27, 2020	47,782	Acquired

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

Initial ownership (Form 3) 5 holdings

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

Date	Ticker	Security	Shares	Ownership
June 24, 2014	AMPH	Stock Option (Right to Buy)→ Common Stock (38,462)	38,462	Direct
June 24, 2014	AMPH	Stock Option (Right to Buy)→ Common Stock (10,381)	10,381	Direct
June 24, 2014	AMPH	Stock Option (Right to Buy)→ Common Stock (37,994)	37,994	Direct
June 24, 2014	AMPH	Stock Option (Right to Buy)→ Common Stock (78,624)	78,624	Direct
June 24, 2014	AMPH	Stock Option (Right to Buy)→ Common Stock (58,557)	58,557	Direct