Jerome S Markowitz

Insider

First SEC filing: July 25, 2019 · Latest: July 25, 2019

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

MKTX

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 27 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

27 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 24, 2019	1466538	A	15,591	—	—	164,331 Direct	+10.48%	Acquired
June 18, 2019	1466538	G	12,000	—	—	148,740 Direct	-7.47%	Disposed
July 31, 2018	1466538	A	16,279	—	—	160,740 Direct	+11.27%	Acquired
June 22, 2017	1466538	A	15,160	—	—	144,461 Direct	+11.72%	Acquired
June 27, 2016	1466538	A	61,747	—	—	517,202 Direct	+13.56%	Acquired
April 27, 2015	1466538	A	42,307	—	—	455,455 Direct	+10.24%	Acquired
May 5, 2014	1466538	A	48,813	—	—	413,148 Direct	+13.40%	Acquired
May 2, 2013	1466538	A	58,155	—	—	364,335 Direct	+18.99%	Acquired
March 11, 2013	1466538	P	100,000	$2.70	$270,000	306,180 Direct	+48.50%	Acquired
March 7, 2013	1466538	P	19,047	$2.64	$50,284	206,180 Direct	+10.18%	Acquired
March 5, 2013	1466538	P	50,000	$2.58	$129,000	187,133 Direct	+36.46%	Acquired
Dec. 14, 2012	1466538	S	322,000	$2.30	$740,600	137,133 Direct	-70.13%	Disposed
May 4, 2012	1466538	A	56,160	—	—	350,930 Direct	+19.05%	Acquired
Dec. 1, 2011	1466538	J	108,122	—	—	294,770 Direct	+57.93%	Acquired
July 29, 2011	MKTX	A	2,870	—	—	17,307 Direct	+19.88%	Acquired	(price as of 2026-08-19)
May 5, 2011	1466538	A	36,471	—	—	186,648 Direct	+24.29%	Acquired
Dec. 29, 2010	1466538	J	106,359	—	—	106,359 Direct	—	Acquired
Nov. 24, 2010	MKTX	G	20,903	—	—	14,437 Direct	-59.15%	Disposed	(price as of 2026-08-19)
July 30, 2010	MKTX	A	4,923	—	—	28,533 Direct	+20.85%	Acquired	(price as of 2026-08-19)
Feb. 23, 2010	1466538	A	18,818	—	—	43,818 Direct	+75.27%	Acquired
Dec. 18, 2009	1466538	P	25,000	$5.00	$125,000	25,000 Direct	—	Acquired
Nov. 2, 2009	1466538	A	321,054	—	—	321,054 Indirect	—	Acquired
July 30, 2009	MKTX	M	3,187	—	—	3,187 Direct	—	Acquired	(price as of 2026-08-19)
July 30, 2009	MKTX	A	4,178	—	—	23,610 Direct	+21.50%	Acquired	(price as of 2026-08-19)
Aug. 1, 2008	MKTX	A	4,225	—	—	4,225 Direct	—	Acquired	(price as of 2026-08-19)
Aug. 1, 2008	MKTX	A	4,225	—	—	19,432 Direct	+27.78%	Acquired	(price as of 2026-08-19)
Aug. 3, 2007	MKTX	M	2,500	—	—	2,500 Direct	—	Acquired	(price as of 2026-08-19)
Aug. 3, 2007	MKTX	A	2,500	—	—	15,207 Direct	+19.67%	Acquired	(price as of 2026-08-19)
Aug. 4, 2006	MKTX	M	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-19)
Aug. 4, 2006	MKTX	A	5,000	—	—	12,707 Direct	+64.88%	Acquired	(price as of 2026-08-19)
Aug. 15, 2005	MKTX	M	5,000	$10.04	$50,200	5,000 Direct	—	Acquired	1513.9% (price as of 2026-08-19)
Aug. 15, 2005	MKTX	A	5,000	—	—	7,707 Direct	+184.71%	Acquired	(price as of 2026-08-19)

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 30, 2009	MKTX	Employee Stock Option (right to buy)	Common Stock (3,187)	$10.77	July 30, 2019	3,187	Acquired
Aug. 1, 2008	MKTX	Non-Qualified Stock Option (right to buy)	Common Stock (4,225)	$9.72	Aug. 1, 2018	4,225	Acquired
Aug. 3, 2007	MKTX	Employee Stock Option (right to buy)	Common Stock (2,500)	$16.99	Aug. 3, 2017	2,500	Acquired
Aug. 4, 2006	MKTX	Employee Stock Option (right to buy)	Common Stock (5,000)	$9.30	Aug. 4, 2016	5,000	Acquired
Aug. 15, 2005	MKTX	Employee Stock Option (right to buy)	Common Stock (5,000)	$10.04	Aug. 15, 2015	5,000	Acquired

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

Initial ownership (Form 3) 7 holdings

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

Date	Ticker	Security	Shares	Ownership
Nov. 19, 2004	MKTX	Common Stock, par value $0.003 per share	2,707	Direct
Nov. 19, 2004	MKTX	Common Stock, par value $0.003 per share	6,807	Indirect
Nov. 19, 2004	MKTX	Stock Option (right to buy)→ Common Stock, par value $0.003 per share (8,334)	8,334	Direct
Nov. 19, 2004	MKTX	Stock Option (right to buy)→ Common Stock, par value $0.003 per share (10,000)	10,000	Direct
Nov. 4, 2004	MKTX	Common Stock, par value $0.003 per share	2,707	Direct
Nov. 4, 2004	MKTX	Common Stock, par value $0.003 per share	6,807	Indirect
Nov. 4, 2004	MKTX	Stock Option (right to buy)→ Common Stock, par value $0.003 per share (8,334)	8,334	Direct