Mark W Joslin

Insider

First SEC filing: Aug. 11, 2004 · Latest: Feb. 13, 2020

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

POOL selling Aug. 3, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 69 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

69 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 3, 2021	POOL	S	7,500	$485.00	$3,637,500	85,195 Direct	-8.09%	Disposed	-60.3% (price as of 2026-08-20)
Aug. 3, 2021	POOL	S	7,500	$480.00	$3,600,000	92,695 Direct	-7.49%	Disposed	-59.9% (price as of 2026-08-20)
Feb. 28, 2021	POOL	F	1,181	$334.77	$395,363	100,195 Direct	-1.16%	Disposed	-42.5% (price as of 2026-08-20)
Feb. 25, 2021	POOL	F	1,771	$322.99	$572,015	101,376 Direct	-1.72%	Disposed	-40.4% (price as of 2026-08-20)
Feb. 24, 2021	POOL	A	2,640	—	—	103,147 Direct	+2.63%	Acquired	(price as of 2026-08-20)
Nov. 4, 2020	POOL	S	3,799	$370.09	$1,405,972	100,505 Direct	-3.64%	Disposed	-48.0% (price as of 2026-08-20)
Oct. 27, 2020	POOL	S	1,201	$370.01	$444,382	104,304 Direct	-1.14%	Disposed	-48.0% (price as of 2026-08-20)
Oct. 26, 2020	POOL	S	5,000	$360.24	$1,801,200	105,505 Direct	-4.52%	Disposed	-46.6% (price as of 2026-08-20)
July 31, 2020	POOL	S	5,000	$315.00	$1,575,000	110,505 Direct	-4.33%	Disposed	-38.9% (price as of 2026-08-20)
July 29, 2020	POOL	S	4,735	$311.00	$1,472,585	115,505 Direct	-3.94%	Disposed	-38.1% (price as of 2026-08-20)
July 28, 2020	POOL	S	265	$311.00	$82,415	120,240 Direct	-0.22%	Disposed	-38.1% (price as of 2026-08-20)
March 1, 2020	POOL	F	1,476	—	—	120,503 Direct	-1.21%	Disposed	(price as of 2026-08-20)
Feb. 26, 2020	POOL	A	4,290	—	—	121,979 Direct	+3.65%	Acquired	(price as of 2026-08-20)
Feb. 26, 2020	POOL	F	1,460	$220.01	$321,215	117,689 Direct	-1.23%	Disposed	-12.5% (price as of 2026-08-20)
Oct. 21, 2019	POOL	S	5,000	$214.84	$1,074,200	120,920 Direct	-3.97%	Disposed	-10.4% (price as of 2026-08-20)
Aug. 21, 2019	POOL	S	7	$200.00	$1,400	125,920 Direct	-0.01%	Disposed	-3.7% (price as of 2026-08-20)
Aug. 9, 2019	POOL	S	1,429	$200.00	$285,800	125,927 Direct	-1.12%	Disposed	-3.7% (price as of 2026-08-20)
March 5, 2019	POOL	M	13,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 5, 2019	POOL	S	13,000	$160.05	$2,080,650	127,356 Direct	-9.26%	Disposed	20.3% (price as of 2026-08-20)
March 5, 2019	POOL	M	13,000	$18.44	$239,720	140,356 Direct	+10.21%	Acquired	944.0% (price as of 2026-08-20)
Feb. 27, 2019	POOL	F	1,460	$160.66	$234,564	127,356 Direct	-1.13%	Disposed	19.8% (price as of 2026-08-20)
Feb. 27, 2019	POOL	F	1,460	$160.66	$234,564	127,356 Direct	-1.13%	Disposed	19.8% (price as of 2026-08-20)
Feb. 27, 2019	POOL	A	5,140	—	—	125,458 Direct	+4.27%	Acquired	(price as of 2026-08-20)
Feb. 27, 2019	POOL	F	3,358	$160.66	$539,496	120,318 Direct	-2.72%	Disposed	19.8% (price as of 2026-08-20)
Aug. 22, 2018	POOL	M	5,473	—	—	13,000 Direct	-29.63%	Disposed	(price as of 2026-08-20)
Aug. 22, 2018	POOL	S	5,473	$162.33	$888,432	123,701 Direct	-4.24%	Disposed	18.6% (price as of 2026-08-20)
Aug. 22, 2018	POOL	M	5,473	$18.44	$100,922	129,174 Direct	+4.42%	Acquired	944.0% (price as of 2026-08-20)
Aug. 21, 2018	POOL	M	7,527	—	—	18,473 Direct	-28.95%	Disposed	(price as of 2026-08-20)
Aug. 21, 2018	POOL	S	7,527	$162.24	$1,221,180	123,701 Direct	-5.74%	Disposed	18.7% (price as of 2026-08-20)
Aug. 21, 2018	POOL	M	7,527	$18.44	$138,798	131,228 Direct	+6.08%	Acquired	944.0% (price as of 2026-08-20)
May 11, 2018	POOL	M	13,000	—	—	26,000 Direct	-33.33%	Disposed	(price as of 2026-08-20)
May 11, 2018	POOL	S	13,000	$150.00	$1,950,000	123,701 Direct	-9.51%	Disposed	28.3% (price as of 2026-08-20)
May 11, 2018	POOL	M	13,000	$18.44	$239,720	136,701 Direct	+10.51%	Acquired	944.0% (price as of 2026-08-20)
Feb. 28, 2018	POOL	A	6,000	—	—	123,701 Direct	+5.10%	Acquired	(price as of 2026-08-20)
Feb. 27, 2018	POOL	F	2,667	$140.56	$374,874	117,701 Direct	-2.22%	Disposed	37.0% (price as of 2026-08-20)
Feb. 26, 2018	POOL	F	2,223	$142.53	$316,844	120,368 Direct	-1.81%	Disposed	35.1% (price as of 2026-08-20)
Feb. 22, 2018	POOL	M	40,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 22, 2018	POOL	S	3,226	$143.11	$461,673	122,591 Direct	-2.56%	Disposed	34.5% (price as of 2026-08-20)
Feb. 22, 2018	POOL	S	17,625	$142.13	$2,505,041	125,817 Direct	-12.29%	Disposed	35.4% (price as of 2026-08-20)
Feb. 22, 2018	POOL	S	12,649	$141.38	$1,788,316	143,442 Direct	-8.10%	Disposed	36.2% (price as of 2026-08-20)
Feb. 22, 2018	POOL	S	6,500	$140.44	$912,860	156,091 Direct	-4.00%	Disposed	37.1% (price as of 2026-08-20)
Feb. 22, 2018	POOL	M	40,000	$20.34	$813,600	162,591 Direct	+32.63%	Acquired	846.4% (price as of 2026-08-20)
March 1, 2017	POOL	M	4,968	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 1, 2017	POOL	A	7,500	—	—	122,584 Direct	+6.52%	Acquired	(price as of 2026-08-20)
March 1, 2017	POOL	S	4,968	$117.25	$582,498	115,084 Direct	-4.14%	Disposed	64.2% (price as of 2026-08-20)
March 1, 2017	POOL	M	4,968	$37.85	$188,039	120,052 Direct	+4.32%	Acquired	408.6% (price as of 2026-08-20)
Feb. 28, 2017	POOL	F	3,388	$114.71	$388,637	115,084 Direct	-2.86%	Disposed	67.8% (price as of 2026-08-20)
Feb. 27, 2017	POOL	F	1,867	$117.15	$218,719	118,472 Direct	-1.55%	Disposed	64.3% (price as of 2026-08-20)
Feb. 27, 2017	POOL	M	1,932	—	—	4,968 Direct	-28.00%	Disposed	(price as of 2026-08-20)
Feb. 27, 2017	POOL	S	1,932	$117.25	$226,527	120,339 Direct	-1.58%	Disposed	64.2% (price as of 2026-08-20)
Feb. 27, 2017	POOL	M	1,932	$37.85	$73,126	122,271 Direct	+1.61%	Acquired	408.6% (price as of 2026-08-20)
Feb. 21, 2017	POOL	M	600	—	—	6,900 Direct	-8.00%	Disposed	(price as of 2026-08-20)
Feb. 21, 2017	POOL	S	600	$117.36	$70,416	120,335 Direct	-0.50%	Disposed	64.0% (price as of 2026-08-20)
Feb. 21, 2017	POOL	M	600	$37.85	$22,710	120,935 Direct	+0.50%	Acquired	408.6% (price as of 2026-08-20)
July 26, 2016	POOL	M	7,500	—	—	7,500 Direct	-50.00%	Disposed	(price as of 2026-08-20)
July 26, 2016	POOL	S	7,500	$100.85	$756,375	120,359 Direct	-5.87%	Disposed	90.9% (price as of 2026-08-20)
July 26, 2016	POOL	M	7,500	$37.85	$283,875	127,859 Direct	+6.23%	Acquired	408.6% (price as of 2026-08-20)
Feb. 27, 2016	POOL	F	1,947	$81.83	$159,323	120,359 Direct	-1.59%	Disposed	135.2% (price as of 2026-08-20)
Feb. 25, 2016	POOL	A	9,000	—	—	122,306 Direct	+7.94%	Acquired	(price as of 2026-08-20)
Nov. 3, 2015	POOL	S	6,215	$82.00	$509,630	112,959 Direct	-5.22%	Disposed	134.8% (price as of 2026-08-20)
Nov. 2, 2015	POOL	S	369	$82.00	$30,258	119,174 Direct	-0.31%	Disposed	134.8% (price as of 2026-08-20)
Oct. 27, 2015	POOL	M	20,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Oct. 27, 2015	POOL	F	3,924	$81.73	$320,709	119,543 Direct	-3.18%	Disposed	135.5% (price as of 2026-08-20)
Oct. 27, 2015	POOL	F	9,492	$81.73	$775,781	123,467 Direct	-7.14%	Disposed	135.5% (price as of 2026-08-20)
Oct. 27, 2015	POOL	M	20,000	$38.79	$775,800	132,959 Direct	+17.71%	Acquired	396.3% (price as of 2026-08-20)
Feb. 28, 2015	POOL	F	3,021	$69.17	$208,963	112,953 Direct	-2.60%	Disposed	178.3% (price as of 2026-08-20)
Feb. 26, 2015	POOL	A	10,000	—	—	115,974 Direct	+9.44%	Acquired	(price as of 2026-08-20)
Feb. 23, 2015	POOL	F	3,754	$69.45	$260,715	105,974 Direct	-3.42%	Disposed	177.2% (price as of 2026-08-20)
Jan. 5, 2015	POOL	M	22,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 5, 2015	POOL	F	3,157	$63.08	$199,144	109,722 Direct	-2.80%	Disposed	205.2% (price as of 2026-08-20)
Jan. 5, 2015	POOL	F	11,239	$63.08	$708,956	112,879 Direct	-9.06%	Disposed	205.2% (price as of 2026-08-20)
Jan. 5, 2015	POOL	M	22,500	$31.51	$708,975	124,118 Direct	+22.14%	Acquired	510.9% (price as of 2026-08-20)
Aug. 6, 2014	POOL	M	11,250	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Aug. 6, 2014	POOL	S	7,992	$55.40	$442,757	101,618 Direct	-7.29%	Disposed	247.5% (price as of 2026-08-20)
Aug. 6, 2014	POOL	M	11,250	$26.65	$299,812	109,610 Direct	+11.44%	Acquired	622.3% (price as of 2026-08-20)
March 2, 2014	POOL	F	3,887	$58.46	$227,234	98,353 Direct	-3.80%	Disposed	229.3% (price as of 2026-08-20)
Feb. 27, 2014	POOL	A	10,000	—	—	102,240 Direct	+10.84%	Acquired	(price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	—	—	11,250 Direct	-25.00%	Disposed	(price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	—	—	15,000 Direct	-20.00%	Disposed	(price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	—	—	18,750 Direct	-16.67%	Disposed	(price as of 2026-08-20)
July 29, 2013	POOL	S	3,750	$52.86	$198,225	91,772 Direct	-3.93%	Disposed	264.2% (price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	$26.65	$99,938	95,522 Direct	+4.09%	Acquired	622.3% (price as of 2026-08-20)
July 29, 2013	POOL	S	3,750	$52.86	$198,225	91,772 Direct	-3.93%	Disposed	264.2% (price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	$26.65	$99,938	95,522 Direct	+4.09%	Acquired	622.3% (price as of 2026-08-20)
July 29, 2013	POOL	S	3,750	$52.86	$198,225	91,772 Direct	-3.93%	Disposed	264.2% (price as of 2026-08-20)
July 29, 2013	POOL	M	3,750	$26.65	$99,938	95,522 Direct	+4.09%	Acquired	622.3% (price as of 2026-08-20)
Feb. 27, 2013	POOL	A	12,000	—	—	91,772 Direct	+15.04%	Acquired	(price as of 2026-08-20)
Feb. 28, 2012	POOL	A	14,400	—	—	79,752 Direct	+22.03%	Acquired	(price as of 2026-08-20)
March 2, 2011	POOL	A	20,800	—	—	65,339 Direct	+46.70%	Acquired	(price as of 2026-08-20)
Feb. 23, 2010	POOL	A	20,800	—	—	44,539 Direct	+87.62%	Acquired	(price as of 2026-08-20)
May 5, 2009	POOL	A	39,000	—	—	39,000 Direct	—	Acquired	(price as of 2026-08-20)
May 5, 2009	POOL	A	5,200	—	—	23,739 Direct	+28.05%	Acquired	(price as of 2026-08-20)
Feb. 26, 2008	POOL	A	40,000	—	—	40,000 Direct	—	Acquired	(price as of 2026-08-20)
May 8, 2007	POOL	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)
May 8, 2007	POOL	A	5,000	—	—	17,510 Direct	+39.97%	Acquired	(price as of 2026-08-20)
June 8, 2006	POOL	P	2,500	$40.50	$101,250	12,500 Direct	+25.00%	Acquired	375.3% (price as of 2026-08-20)
June 7, 2006	POOL	P	2,500	$41.50	$103,750	10,000 Direct	+33.33%	Acquired	363.9% (price as of 2026-08-20)
Feb. 8, 2006	POOL	A	20,000	—	—	20,000 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 14, 2005	POOL	A	22,500	—	—	22,500 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 9, 2004	POOL	A	15,000	—	—	15,000 Direct	—	Acquired	(price as of 2026-08-20)

Showing latest 100 of 102 transactions

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 5, 2019	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (13,000)	$18.44	May 5, 2019	13,000	Disposed
Aug. 22, 2018	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (5,473)	$18.44	May 5, 2019	5,473	Disposed
Aug. 21, 2018	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (7,527)	$18.44	May 5, 2019	7,527	Disposed
May 11, 2018	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (13,000)	$18.44	May 5, 2019	13,000	Disposed
Feb. 22, 2018	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (40,000)	$20.34	Feb. 26, 2018	40,000	Disposed
March 1, 2017	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (4,968)	$37.85	May 8, 2017	4,968	Disposed
Feb. 27, 2017	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (1,932)	$37.85	May 8, 2017	1,932	Disposed
Feb. 21, 2017	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (600)	$37.85	May 8, 2017	600	Disposed
July 26, 2016	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (7,500)	$37.85	May 8, 2017	7,500	Disposed
Oct. 27, 2015	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (20,000)	$38.79	Feb. 8, 2016	20,000	Disposed
Jan. 5, 2015	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (22,500)	$31.51	Feb. 14, 2015	22,500	Disposed
Aug. 6, 2014	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (11,250)	$26.65	Aug. 9, 2014	11,250	Disposed
July 29, 2013	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (3,750)	$26.65	Aug. 9, 2014	3,750	Disposed
July 29, 2013	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (3,750)	$26.65	Aug. 9, 2014	3,750	Disposed
July 29, 2013	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (3,750)	$26.65	Aug. 9, 2014	3,750	Disposed
May 5, 2009	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (39,000)	$18.44	May 5, 2019	39,000	Acquired
Feb. 26, 2008	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (40,000)	$20.34	Feb. 26, 2018	40,000	Acquired
May 8, 2007	POOL	Non-Qualified Stock Option (right to buy)	Common Stock (15,000)	$37.85	May 8, 2017	15,000	Acquired
Feb. 8, 2006	POOL	Employee Stock Option (Right to Buy)	Common Stock (20,000)	$38.79	Feb. 8, 2016	20,000	Acquired
Feb. 14, 2005	POOL	Employee Stock Option (Right to Buy)	Common Stock (22,500)	$31.51	Feb. 14, 2015	22,500	Acquired
Aug. 9, 2004	POOL	Employee Stock Option (Right to Buy)	Common Stock (15,000)	—	Aug. 9, 2014	15,000	Acquired
Aug. 9, 2004	POOL	Employee Stock Option (Right to Buy)	Common Stock (15,000)	$39.81	Aug. 9, 2014	15,000	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
Aug. 11, 2004	POOL	Common Stock	0	Direct