Peter M Ziemba

Insider

First SEC filing: July 22, 2011 · Latest: Jan. 17, 2017

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

WT selling May 19, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-1,931,000 + 82 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

82 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 19, 2026	WT	S	100,000	$19.31	$1,931,000	885,686 Direct	-10.15%	Disposed	18.8% (price as of 2026-08-20)
Feb. 23, 2026	WT	A	3,046	—	—	3,046 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 27, 2026	WT	M	61,005	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 27, 2026	WT	F	31,563	—	—	985,686 Direct	-3.10%	Disposed	(price as of 2026-08-20)
Jan. 27, 2026	WT	M	61,005	—	—	1,017,249 Direct	+6.38%	Acquired	(price as of 2026-08-20)
Jan. 25, 2026	WT	A	5,571	—	—	5,571 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 25, 2026	WT	A	25,853	—	—	983,503 Direct	+2.70%	Acquired	(price as of 2026-08-20)
Jan. 25, 2026	WT	F	27,259	—	—	956,244 Direct	-2.77%	Disposed	(price as of 2026-08-20)
Jan. 25, 2026	WT	A	8,617	—	—	8,617 Direct	—	Acquired	(price as of 2026-08-20)
June 6, 2022	WT	G	850	—	—	1,006,362 Direct	-0.08%	Disposed	(price as of 2026-08-20)
June 6, 2022	WT	G	8,400	—	—	1,007,212 Direct	-0.83%	Disposed	(price as of 2026-08-20)
June 3, 2022	WT	G	5,000	—	—	1,015,612 Direct	-0.49%	Disposed	(price as of 2026-08-20)
June 3, 2022	WT	G	5,000	—	—	1,020,612 Direct	-0.49%	Disposed	(price as of 2026-08-20)
Jan. 25, 2022	WT	A	16,654	—	—	16,654 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 25, 2022	WT	A	19,764	—	—	19,764 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 25, 2022	WT	F	22,895	—	—	1,025,612 Direct	-2.18%	Disposed	(price as of 2026-08-20)
Jan. 25, 2022	WT	A	59,293	—	—	1,048,507 Direct	+5.99%	Acquired	(price as of 2026-08-20)
Nov. 17, 2021	WT	S	5,000	$6.76	$33,800	989,214 Direct	-0.50%	Disposed	239.3% (price as of 2026-08-20)
May 21, 2021	WT	G	8,500	—	—	994,214 Direct	-0.85%	Disposed	(price as of 2026-08-20)
May 20, 2021	WT	G	8,000	—	—	1,002,714 Direct	-0.79%	Disposed	(price as of 2026-08-20)
Jan. 25, 2021	WT	A	15,084	—	—	15,084 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 25, 2021	WT	F	20,571	—	—	1,010,714 Direct	-1.99%	Disposed	(price as of 2026-08-20)
Jan. 25, 2021	WT	A	45,251	—	—	1,031,285 Direct	+4.59%	Acquired	(price as of 2026-08-20)
Dec. 9, 2020	WT	G	11,500	—	—	986,034 Direct	-1.15%	Disposed	(price as of 2026-08-20)
Feb. 3, 2020	WT	P	25,000	$4.19	$104,750	1,004,201 Direct	+2.55%	Acquired	447.5% (price as of 2026-08-20)
Feb. 4, 2019	WT	P	16,000	$6.07	$97,120	957,177 Direct	+1.70%	Acquired	277.9% (price as of 2026-08-20)
Jan. 27, 2019	WT	F	10,249	—	—	941,177 Direct	-1.08%	Disposed	(price as of 2026-08-20)
Jan. 25, 2019	WT	A	24,299	—	—	24,299 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 25, 2019	WT	F	6,014	—	—	951,426 Direct	-0.63%	Disposed	(price as of 2026-08-20)
Jan. 25, 2019	WT	A	97,196	—	—	957,440 Direct	+11.30%	Acquired	(price as of 2026-08-20)
Feb. 15, 2018	WT	G	6,000	—	—	865,844 Direct	-0.69%	Disposed	(price as of 2026-08-20)
Feb. 15, 2018	WT	G	6,000	—	—	865,844 Direct	-0.69%	Disposed	(price as of 2026-08-20)
Jan. 25, 2018	WT	A	34,398	—	—	871,844 Direct	+4.11%	Acquired	(price as of 2026-08-20)
Dec. 29, 2017	WT	F	6,565	—	—	837,446 Direct	-0.78%	Disposed	(price as of 2026-08-20)
Dec. 29, 2017	WT	F	15,459	—	—	844,011 Direct	-1.80%	Disposed	(price as of 2026-08-20)
Dec. 29, 2017	WT	F	1,984	—	—	859,470 Direct	-0.23%	Disposed	(price as of 2026-08-20)
Dec. 14, 2017	WT	G	2,650	—	—	861,454 Direct	-0.31%	Disposed	(price as of 2026-08-20)
May 23, 2017	WT	G	5,600	—	—	860,244 Direct	-0.65%	Disposed	(price as of 2026-08-20)
Jan. 28, 2017	WT	F	5,201	—	—	864,104 Direct	-0.60%	Disposed	(price as of 2026-08-20)
Jan. 28, 2017	WT	F	5,147	—	—	864,158 Direct	-0.59%	Disposed	(price as of 2026-08-20)
Jan. 27, 2017	WT	F	11,029	—	—	869,305 Direct	-1.25%	Disposed	(price as of 2026-08-20)
Jan. 27, 2017	WT	F	11,029	—	—	869,305 Direct	-1.25%	Disposed	(price as of 2026-08-20)
Jan. 25, 2017	WT	A	11,542	—	—	880,334 Direct	+1.33%	Acquired	(price as of 2026-08-20)
Jan. 14, 2017	WT	F	4,252	—	—	868,792 Direct	-0.49%	Disposed	(price as of 2026-08-20)
Sept. 9, 2016	WT	G	5,000	—	—	873,544 Direct	-0.57%	Disposed	(price as of 2026-08-20)
Jan. 28, 2016	WT	F	5,201	—	—	878,544 Direct	-0.59%	Disposed	(price as of 2026-08-20)
Jan. 27, 2016	WT	A	89,929	—	—	883,745 Direct	+11.33%	Acquired	(price as of 2026-08-20)
Jan. 25, 2016	WT	F	13,864	—	—	793,816 Direct	-1.72%	Disposed	(price as of 2026-08-20)
Jan. 22, 2016	WT	F	5,189	—	—	807,680 Direct	-0.64%	Disposed	(price as of 2026-08-20)
Jan. 14, 2016	WT	F	4,180	—	—	812,869 Direct	-0.51%	Disposed	(price as of 2026-08-20)
Dec. 14, 2015	WT	G	300	—	—	817,049 Direct	-0.04%	Disposed	(price as of 2026-08-20)
Dec. 11, 2015	WT	G	2,950	—	—	817,349 Direct	-0.36%	Disposed	(price as of 2026-08-20)
Aug. 5, 2015	WT	S	1,000	$25.95	$25,950	14,300 Indirect	-6.54%	Disposed	-11.6% (price as of 2026-08-20)
May 7, 2015	WT	M	100,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 7, 2015	WT	M	250,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 7, 2015	WT	S	194,608	$19.39	$3,773,449	820,299 Direct	-19.17%	Disposed	18.3% (price as of 2026-08-20)
May 7, 2015	WT	M	100,000	$2.25	$225,000	1,014,907 Direct	+10.93%	Acquired	919.6% (price as of 2026-08-20)
May 7, 2015	WT	M	250,000	$1.07	$267,500	914,907 Direct	+37.60%	Acquired	2043.9% (price as of 2026-08-20)
March 2, 2015	WT	M	50,000	—	—	250,000 Direct	-16.67%	Disposed	(price as of 2026-08-20)
March 2, 2015	WT	S	50,000	$19.20	$960,000	664,907 Direct	-6.99%	Disposed	19.5% (price as of 2026-08-20)
March 2, 2015	WT	M	50,000	$1.07	$53,500	714,907 Direct	+7.52%	Acquired	2043.9% (price as of 2026-08-20)
Jan. 27, 2015	WT	F	12,893	—	—	622,700 Direct	-2.03%	Disposed	(price as of 2026-08-20)
Jan. 25, 2015	WT	F	14,380	—	—	635,593 Direct	-2.21%	Disposed	(price as of 2026-08-20)
Jan. 22, 2015	WT	F	5,219	—	—	649,973 Direct	-0.80%	Disposed	(price as of 2026-08-20)
Jan. 14, 2015	WT	F	4,062	—	—	655,192 Direct	-0.62%	Disposed	(price as of 2026-08-20)
Dec. 15, 2014	WT	G	1,500	—	—	15,300 Indirect	+10.87%	Acquired	(price as of 2026-08-20)
Dec. 15, 2014	WT	G	3,700	—	—	659,254 Direct	-0.56%	Disposed	(price as of 2026-08-20)
Aug. 25, 2014	WT	M	5,350	—	—	300,000 Direct	-1.75%	Disposed	(price as of 2026-08-20)
Aug. 25, 2014	WT	S	5,350	$11.28	$60,348	662,954 Direct	-0.80%	Disposed	103.4% (price as of 2026-08-20)
Aug. 25, 2014	WT	M	5,350	$1.07	$5,724	668,304 Direct	+0.81%	Acquired	2043.9% (price as of 2026-08-20)
Aug. 22, 2014	WT	M	44,650	—	—	305,350 Direct	-12.76%	Disposed	(price as of 2026-08-20)
Aug. 22, 2014	WT	S	44,650	$11.02	$492,043	662,954 Direct	-6.31%	Disposed	108.2% (price as of 2026-08-20)
Aug. 22, 2014	WT	M	44,650	$1.07	$47,776	707,604 Direct	+6.74%	Acquired	2043.9% (price as of 2026-08-20)
Jan. 27, 2014	WT	F	12,893	—	—	673,691 Direct	-1.88%	Disposed	(price as of 2026-08-20)
Jan. 25, 2014	WT	F	15,060	—	—	686,584 Direct	-2.15%	Disposed	(price as of 2026-08-20)
Jan. 22, 2014	WT	F	28,330	—	—	690,907 Direct	-3.94%	Disposed	(price as of 2026-08-20)
Jan. 14, 2014	WT	A	30,167	—	—	701,644 Direct	+4.49%	Acquired	(price as of 2026-08-20)
Dec. 6, 2013	WT	G	1,800	—	—	13,800 Indirect	+15.00%	Acquired	(price as of 2026-08-20)
Dec. 6, 2013	WT	G	1,800	—	—	8,800 Indirect	+25.71%	Acquired	(price as of 2026-08-20)
Dec. 6, 2013	WT	G	3,800	—	—	671,477 Direct	-0.56%	Disposed	(price as of 2026-08-20)
March 12, 2013	WT	S	1,600	$9.61	$15,376	12,000 Indirect	-11.76%	Disposed	138.7% (price as of 2026-08-20)
Feb. 11, 2013	WT	S	2,500	$9.59	$23,975	7,000 Indirect	-26.32%	Disposed	139.2% (price as of 2026-08-20)
Jan. 22, 2013	WT	A	56,661	—	—	675,277 Direct	+9.16%	Acquired	(price as of 2026-08-20)
Dec. 19, 2012	WT	F	31,823	—	—	618,616 Direct	-4.89%	Disposed	(price as of 2026-08-20)
Dec. 11, 2012	WT	G	4,000	—	—	8,000 Indirect	-33.33%	Disposed	(price as of 2026-08-20)
Dec. 11, 2012	WT	G	4,000	—	—	13,600 Indirect	-22.73%	Disposed	(price as of 2026-08-20)
Aug. 21, 2012	WT	S	75,000	$6.73	$504,750	628,242 Direct	-10.66%	Disposed	240.9% (price as of 2026-08-20)
Aug. 20, 2012	WT	M	100,000	—	—	400,000 Direct	-20.00%	Disposed	(price as of 2026-08-20)
Aug. 20, 2012	WT	S	25,000	$6.72	$168,000	703,242 Direct	-3.43%	Disposed	241.4% (price as of 2026-08-20)
Aug. 20, 2012	WT	M	100,000	$1.07	$107,000	728,242 Direct	+15.92%	Acquired	2043.9% (price as of 2026-08-20)
Aug. 16, 2012	WT	S	10,000	$6.61	$66,100	628,242 Direct	-1.57%	Disposed	247.0% (price as of 2026-08-20)
Aug. 15, 2012	WT	S	27,309	$6.51	$177,782	638,242 Direct	-4.10%	Disposed	252.4% (price as of 2026-08-20)
Aug. 14, 2012	WT	S	37,691	$6.66	$251,022	665,551 Direct	+6.00%	Acquired	244.4% (price as of 2026-08-20)
Aug. 13, 2012	WT	M	100,000	—	—	500,000 Direct	-16.67%	Disposed	(price as of 2026-08-20)
Aug. 13, 2012	WT	S	25,000	$6.66	$166,500	703,242 Direct	-3.43%	Disposed	244.4% (price as of 2026-08-20)
Aug. 13, 2012	WT	M	100,000	$1.07	$107,000	728,242 Direct	+15.92%	Acquired	2043.9% (price as of 2026-08-20)
Feb. 3, 2012	WT	M	27,768	—	—	600,000 Direct	-4.42%	Disposed	(price as of 2026-08-20)
Feb. 3, 2012	WT	S	27,768	$5.33	$148,003	658,439 Direct	-4.05%	Disposed	330.4% (price as of 2026-08-20)
Feb. 3, 2012	WT	M	27,768	$1.07	$29,712	686,207 Direct	+4.22%	Acquired	2043.9% (price as of 2026-08-20)
Feb. 2, 2012	WT	M	172,232	—	—	627,768 Direct	-21.53%	Disposed	(price as of 2026-08-20)

Showing latest 100 of 107 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
Feb. 23, 2026	WT	Performance Based Restricted Stock Units [F1]	Common Stock (3,046)	—	—	3,046	Acquired
Jan. 27, 2026	WT	Performance Based Restricted Stock Units	Common Stock	—	—	61,005	Disposed
Jan. 25, 2026	WT	Performance Based Restricted Stock Units	Common Stock (5,571)	—	—	5,571	Acquired
Jan. 25, 2026	WT	Performance Based Restricted Stock Units	Common Stock (8,617)	—	—	8,617	Acquired
Jan. 25, 2022	WT	Performance Based Restricted Stock Units	Common Stock (16,654)	$0.00	—	16,654	Acquired
Jan. 25, 2022	WT	Performance Based Restricted Stock Units	Common Stock (19,764)	$0.00	—	19,764	Acquired
Jan. 25, 2021	WT	Performance Based Restricted Stock Units	Common Stock (15,084)	$0.00	—	15,084	Acquired
Jan. 25, 2019	WT	Performance Based Restricted Stock Units	Common Stock (24,299)	$0.00	—	24,299	Acquired
May 7, 2015	WT	Stock Option (right to buy)	Common Stock (100,000)	$2.25	Jan. 27, 2020	100,000	Disposed
May 7, 2015	WT	Stock Option (right to buy)	Common Stock (250,000)	$1.07	April 22, 2017	250,000	Disposed
March 2, 2015	WT	Stock Option (right to buy)	Common Stock (50,000)	$1.07	April 22, 2017	50,000	Disposed
Aug. 25, 2014	WT	Stock Option (right to buy)	Common Stock (5,350)	$1.07	April 22, 2017	5,350	Disposed
Aug. 22, 2014	WT	Stock Option (right to buy)	Common Stock (44,650)	$1.07	April 22, 2017	44,650	Disposed
Aug. 20, 2012	WT	Stock Option (right to buy)	Common Stock (100,000)	$1.07	April 22, 2017	100,000	Disposed
Aug. 13, 2012	WT	Stock Option (right to buy)	Common Stock (100,000)	$1.07	April 22, 2017	100,000	Disposed
Feb. 3, 2012	WT	Stock Option (right to buy)	Common Stock (27,768)	$1.07	April 22, 2017	27,768	Disposed
Feb. 2, 2012	WT	Stock Option (right to buy)	Common Stock (172,232)	$1.07	April 22, 2017	172,232	Disposed
July 30, 2003	WT	Stock Option (Right to Buy)	Common Stock (100,000)	$0.10	July 29, 2013	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 22, 2011	WT	Common Stock	408,401	Direct
July 22, 2011	WT	Common Stock	105,197	Direct
July 22, 2011	WT	Common Stock	9,600	Indirect
July 22, 2011	WT	Common Stock	4,500	Indirect
July 22, 2011	WT	Stock Option (right to buy)→ common stock (800,000)	800,000	Direct
July 22, 2011	WT	Stock Option (right to buy)→ commo stock (100,000)	100,000	Direct

Compensation (DEF 14A)

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

WT

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2021	$375,000	$840,550	—	—	—	—	$13,000	$1,569,443
2020	$375,000	$551,000	—	—	—	—	$13,000	$1,121,936
2019	$375,000	$760,000	—	—	—	—	$12,500	$1,923,124

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