Donald K Grierson

CIK 1191246 · View on SEC EDGAR ↗

Insider

First SEC filing: May 14, 2009 · Latest: May 14, 2009

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.

Insider at

PTC selling Feb. 7, 2017

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 47 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

47 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 7, 2017	PTC	S	10,000	$53.78	$537,800	64,829 Direct	-13.36%	Disposed	184.1% (price as of 2026-08-21)
Aug. 3, 2016	PTC	S 10b5-1	5,000	$39.41	$197,050	74,829 Direct	-6.26%	Disposed	287.6% (price as of 2026-08-21)
March 2, 2016	PTC	A	7,471	—	—	7,471 Direct	—	Acquired	(price as of 2026-08-21)
March 2, 2016	PTC	M	7,136	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 2, 2016	PTC	M	7,136	—	—	79,829 Direct	+9.82%	Acquired	(price as of 2026-08-21)
Nov. 2, 2015	PTC	S 10b5-1	5,000	$35.94	$179,700	72,693 Direct	-6.44%	Disposed	325.1% (price as of 2026-08-21)
Aug. 3, 2015	PTC	S 10b5-1	5,000	$36.40	$182,000	77,693 Direct	-6.05%	Disposed	319.7% (price as of 2026-08-21)
May 7, 2015	PTC	S	5,000	$38.09	$190,450	82,693 Direct	-5.70%	Disposed	301.1% (price as of 2026-08-21)
March 4, 2015	PTC	A	7,136	—	—	7,136 Direct	—	Acquired	(price as of 2026-08-21)
March 4, 2015	PTC	M	7,535	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 4, 2015	PTC	M	7,535	—	—	87,693 Direct	+9.40%	Acquired	(price as of 2026-08-21)
March 7, 2014	PTC	S	10,000	$39.24	$392,400	80,158 Direct	-11.09%	Disposed	289.3% (price as of 2026-08-21)
March 5, 2014	PTC	A	7,535	—	—	7,535 Direct	—	Acquired	(price as of 2026-08-21)
March 5, 2014	PTC	M	12,249	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
March 5, 2014	PTC	M	12,249	—	—	90,158 Direct	+15.72%	Acquired	(price as of 2026-08-21)
March 6, 2013	PTC	A	12,249	—	—	12,249 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 1, 2013	PTC	S	10,103	$23.54	$237,825	77,909 Direct	-11.48%	Disposed	549.0% (price as of 2026-08-21)
Dec. 4, 2012	PTC	S	10,000	$20.10	$201,000	98,012 Direct	-9.26%	Disposed	660.0% (price as of 2026-08-21)
Aug. 15, 2012	PTC	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Aug. 15, 2012	PTC	S	10,000	$21.67	$216,700	98,012 Direct	-9.26%	Disposed	605.0% (price as of 2026-08-21)
Aug. 15, 2012	PTC	M	10,000	$11.48	$114,800	108,012 Direct	+10.20%	Acquired	1230.7% (price as of 2026-08-21)
July 31, 2012	PTC	A	2,075	—	—	98,012 Direct	+2.16%	Acquired	(price as of 2026-08-21)
March 7, 2012	PTC	A	9,014	—	—	95,937 Direct	+10.37%	Acquired	(price as of 2026-08-21)
Jan. 30, 2012	PTC	M	15,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Jan. 30, 2012	PTC	S	15,000	$25.10	$376,500	86,923 Direct	-14.72%	Disposed	508.6% (price as of 2026-08-21)
Jan. 30, 2012	PTC	M	15,000	$8.50	$127,500	101,923 Direct	+17.26%	Acquired	1697.3% (price as of 2026-08-21)
Sept. 8, 2011	PTC	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Sept. 8, 2011	PTC	S	20,000	$16.73	$334,600	86,923 Direct	-18.71%	Disposed	813.2% (price as of 2026-08-21)
Sept. 8, 2011	PTC	M	20,000	$12.58	$251,600	106,923 Direct	+23.01%	Acquired	1114.4% (price as of 2026-08-21)
Sept. 7, 2011	PTC	M	10,000	—	—	20,000 Direct	-33.33%	Disposed	(price as of 2026-08-21)
Sept. 7, 2011	PTC	S	10,000	$17.07	$170,700	86,923 Direct	-10.32%	Disposed	795.0% (price as of 2026-08-21)
Sept. 7, 2011	PTC	M	10,000	$12.58	$125,800	96,923 Direct	+11.50%	Acquired	1114.4% (price as of 2026-08-21)
May 10, 2011	PTC	M	10,000	—	—	30,000 Direct	-25.00%	Disposed	(price as of 2026-08-21)
May 10, 2011	PTC	S	10,000	$23.12	$231,200	86,923 Direct	-10.32%	Disposed	560.8% (price as of 2026-08-21)
May 10, 2011	PTC	M	10,000	$12.58	$125,800	96,923 Direct	+11.50%	Acquired	1114.4% (price as of 2026-08-21)
March 9, 2011	PTC	A	10,103	—	—	86,923 Direct	+13.15%	Acquired	(price as of 2026-08-21)
March 12, 2010	PTC	S	3,000	$17.98	$53,940	76,820 Direct	-3.76%	Disposed	749.7% (price as of 2026-08-21)
March 3, 2010	PTC	A	12,912	—	—	79,820 Direct	+19.30%	Acquired	(price as of 2026-08-21)
May 13, 2009	PTC	A	15,464	—	—	66,908 Direct	+30.06%	Acquired	(price as of 2026-08-21)
May 8, 2009	PTC	A	3,843	$11.15	$42,849	51,444 Direct	+8.07%	Acquired	1270.1% (price as of 2026-08-21)
March 5, 2008	PTC	A	11,213	$15.06	$168,868	47,601 Direct	+30.82%	Acquired	914.4% (price as of 2026-08-21)
May 17, 2007	PTC	M	2,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 17, 2007	PTC	M	2,500	$4.97	$12,425	36,388 Direct	+7.38%	Acquired	2973.8% (price as of 2026-08-21)
March 7, 2007	PTC	A	9,888	—	—	33,888 Direct	+41.20%	Acquired	(price as of 2026-08-21)
Nov. 2, 2006	PTC	M	7,500	—	—	105,500 Direct	-6.64%	Disposed	(price as of 2026-08-21)
Nov. 2, 2006	PTC	M	5,000	—	—	113,000 Direct	-4.24%	Disposed	(price as of 2026-08-21)
Nov. 2, 2006	PTC	S	12,500	$18.51	$231,375	24,000 Direct	-34.25%	Disposed	725.3% (price as of 2026-08-21)
Nov. 2, 2006	PTC	M	7,500	$4.97	$37,275	36,500 Direct	+25.86%	Acquired	2973.8% (price as of 2026-08-21)
Nov. 2, 2006	PTC	M	5,000	$8.50	$42,500	29,000 Direct	+20.83%	Acquired	1697.3% (price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	10,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	10,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	20,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	40,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	6,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	12,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	6,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	6,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	4,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	M	0	—	—	4,000 Direct	0.00%	Acquired	(price as of 2026-08-21)
March 1, 2006	PTC	A	12,000	—	—	24,000 Direct	+100.00%	Acquired	(price as of 2026-08-21)
July 28, 2005	PTC	A	30,000	—	—	30,000 Direct	—	Acquired	(price as of 2026-08-21)
March 3, 2004	PTC	A	25,000	—	—	305,000 Direct	+8.93%	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
March 2, 2016	PTC	Restricted Stock Units	Common Stock (7,471)	—	—	7,471	Acquired
March 2, 2016	PTC	Restricted Stock Units	Common Stock (7,136)	—	—	7,136	Disposed
March 4, 2015	PTC	Restricted Stock Units	Common Stock (7,136)	—	—	7,136	Acquired
March 4, 2015	PTC	Restricted Stock Units	Common Stock (7,535)	—	—	7,535	Disposed
March 5, 2014	PTC	Restricted Stock Units	Common Stock (7,535)	—	—	7,535	Acquired
March 5, 2014	PTC	Restricted Stock Units	Common Stock (12,249)	—	—	12,249	Disposed
March 6, 2013	PTC	Restricted Stock Units	Common Stock (12,249)	—	—	12,249	Acquired
Aug. 15, 2012	PTC	Employee Stock Option (right to buy)	Common Stock (10,000)	$11.48	March 3, 2014	10,000	Disposed
Jan. 30, 2012	PTC	Employee Stock Option (right to buy)	Common Stock (15,000)	$8.50	May 30, 2012	15,000	Disposed
Sept. 8, 2011	PTC	Stock Option (right to buy)	Common Stock (20,000)	$12.58	Sept. 20, 2011	20,000	Disposed
Sept. 7, 2011	PTC	Stock Option (right to buy)	Common Stock (10,000)	$12.58	Sept. 20, 2011	10,000	Disposed
May 10, 2011	PTC	Employee Stock Option (right to buy)	Common Stock (10,000)	$12.58	Sept. 20, 2011	10,000	Disposed
May 17, 2007	PTC	Stock Option (Right to Buy)	Common Stock (2,500)	$4.97	Feb. 13, 2013	2,500	Disposed
Nov. 2, 2006	PTC	Stock Option (right to buy)	Common Stock (7,500)	$4.97	Feb. 13, 2013	7,500	Disposed
Nov. 2, 2006	PTC	Stock Option (right to buy)	Common Stock (5,000)	$8.50	May 30, 2012	5,000	Disposed
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (10,000)	$11.48	March 3, 2014	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (10,000)	$4.97	Feb. 13, 2013	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (20,000)	$8.50	May 30, 2012	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (40,000)	$12.58	Sept. 20, 2011	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (6,000)	$39.22	Feb. 15, 2011	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (12,000)	$25.62	June 20, 2010	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (6,000)	$57.34	Feb. 10, 2010	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (6,000)	$35.47	Feb. 11, 2009	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (4,000)	$73.52	Feb. 12, 2008	0	Acquired
March 1, 2006	PTC	Stock Option (right to buy)	Common Stock (4,000)	$73.67	Feb. 13, 2007	0	Acquired
March 3, 2004	PTC	Stock Option (Right to Buy)	Common Stock (25,000)	$4.59	March 3, 2014	25,000	Acquired

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