John L Prince

Insider

First SEC filing: Aug. 4, 2005 · Latest: Aug. 4, 2005

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

ALTO selling Aug. 12, 2016

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 17 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

17 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 17, 2021	ALTO	A	17,799	—	—	146,103 Direct	+13.87%	Acquired	(price as of 2026-08-21)
Dec. 10, 2020	ALTO	A	19,504	—	—	128,304 Direct	+17.93%	Acquired	(price as of 2026-08-21)
Nov. 18, 2019	ALTO	A	31,666	—	—	108,800 Direct	+41.05%	Acquired	(price as of 2026-08-21)
Aug. 12, 2016	ALTO	S	17,745	$6.64	$117,827	28,801 Direct	-38.12%	Disposed	-34.8% (price as of 2026-08-21)
June 16, 2016	ALTO	A	17,367	—	—	46,546 Direct	+59.52%	Acquired	(price as of 2026-08-21)
Nov. 17, 2015	ALTO	P	4,000	$4.05	$16,200	29,179 Direct	+15.89%	Acquired	6.9% (price as of 2026-08-21)
June 11, 2015	ALTO	A	7,435	—	—	25,179 Direct	+41.90%	Acquired	(price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	640	$21.15	$13,536	17,744 Direct	-3.48%	Disposed	-79.5% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	100	$21.13	$2,113	18,384 Direct	-0.54%	Disposed	-79.5% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	1,100	$21.11	$23,221	18,484 Direct	-5.62%	Disposed	-79.5% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	1,034	$21.09	$21,807	19,584 Direct	-5.02%	Disposed	-79.5% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	300	$21.08	$6,324	20,618 Direct	-1.43%	Disposed	-79.5% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	300	$21.07	$6,321	20,918 Direct	-1.41%	Disposed	-79.4% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	1,300	$21.06	$27,378	21,218 Direct	-5.77%	Disposed	-79.4% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	631	$21.05	$13,283	22,518 Direct	-2.73%	Disposed	-79.4% (price as of 2026-08-21)
Aug. 18, 2014	ALTO	S	6,569	$21.04	$138,212	23,149 Direct	-22.10%	Disposed	-79.4% (price as of 2026-08-21)
June 18, 2014	ALTO	A	4,412	—	—	29,718 Direct	+17.43%	Acquired	(price as of 2026-08-21)
June 24, 2013	ALTO	A	13,333	—	—	25,306 Direct	+111.36%	Acquired	(price as of 2026-08-21)
Jan. 7, 2013	ALTO	A	150,000	—	—	179,592 Direct	+506.89%	Acquired	(price as of 2026-08-21)
Dec. 13, 2012	ALTO	A	150,000	—	—	179,592 Direct	+506.89%	Acquired	(price as of 2026-08-21)
Aug. 1, 2011	ALTO	A	8,571	—	—	29,592 Direct	+40.77%	Acquired	(price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	2,100	$0.85	$1,785	147,142 Direct	-1.41%	Disposed	-95.1% (price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	2,900	$0.85	$2,465	149,242 Direct	-1.91%	Disposed	-95.1% (price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	4,900	$0.86	$4,214	152,142 Direct	-3.12%	Disposed	-95.2% (price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	100	$0.86	$86	157,042 Direct	-0.06%	Disposed	-95.2% (price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	5,000	$0.86	$4,300	157,142 Direct	-3.08%	Disposed	-95.2% (price as of 2026-08-21)
Dec. 13, 2010	ALTO	S	5,000	$0.77	$3,850	162,142 Direct	-2.99%	Disposed	-94.6% (price as of 2026-08-21)
Dec. 10, 2010	ALTO	S	3,900	$0.76	$2,964	167,142 Direct	-2.28%	Disposed	-94.6% (price as of 2026-08-21)
Dec. 9, 2010	ALTO	S	5,000	$0.65	$3,250	171,042 Direct	-2.84%	Disposed	-93.7% (price as of 2026-08-21)
Dec. 8, 2010	ALTO	S	100	$0.63	$63	176,042 Direct	-0.06%	Disposed	-93.5% (price as of 2026-08-21)
Dec. 7, 2010	ALTO	S	5,000	$0.64	$3,200	176,142 Direct	-2.76%	Disposed	-93.6% (price as of 2026-08-21)
Dec. 7, 2010	ALTO	S	3,800	$0.64	$2,432	181,142 Direct	-2.05%	Disposed	-93.6% (price as of 2026-08-21)
Dec. 7, 2010	ALTO	S	1,200	$0.64	$768	184,942 Direct	-0.64%	Disposed	-93.6% (price as of 2026-08-21)
Dec. 1, 2010	ALTO	S	10,000	$0.74	$7,400	186,142 Direct	-5.10%	Disposed	-94.4% (price as of 2026-08-21)
Nov. 30, 2010	ALTO	S	7,267	$0.73	$5,305	196,142 Direct	-3.57%	Disposed	-94.3% (price as of 2026-08-21)
Nov. 30, 2010	ALTO	S	3,133	$0.73	$2,287	203,409 Direct	-1.52%	Disposed	-94.3% (price as of 2026-08-21)
Oct. 20, 2010	ALTO	A	90,000	—	—	206,542 Direct	+77.23%	Acquired	(price as of 2026-08-21)
Oct. 1, 2010	ALTO	A	57,142	—	—	116,542 Direct	+96.20%	Acquired	(price as of 2026-08-21)
Jan. 28, 2010	ALTO	A	30,000	—	—	59,400 Direct	+102.04%	Acquired	(price as of 2026-08-21)
Dec. 28, 2009	ALTO	D	25,300	—	—	29,400 Direct	-46.25%	Disposed	(price as of 2026-08-21)
Sept. 14, 2009	ALTO	S	5,200	$0.50	$2,600	54,700 Direct	-8.68%	Disposed	-91.8% (price as of 2026-08-21)
June 12, 2008	ALTO	A	44,300	—	—	59,900 Direct	+283.97%	Acquired	(price as of 2026-08-21)
Oct. 4, 2006	ALTO	A	15,600	—	—	15,600 Direct	—	Acquired	(price as of 2026-08-21)
July 28, 2005	ALTO	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-21)

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
July 28, 2005	ALTO	Common Stock Purchase Option [F1]	Common Stock (15,000)	$8.30	July 28, 2015	15,000	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
Aug. 4, 2005	ALTO	No securites are beneficially owned	0	Direct
Aug. 4, 2005	ALTO	Common Stock Purchase Option [F1]→ Common Stock (15,000)	15,000	Direct