Donald E Schrock

CIK 1191317 · View on SEC EDGAR ↗

Insider

First SEC filing: Nov. 19, 2014 · Latest: Nov. 19, 2014

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

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
Aug. 5, 2021	MXL	S	18,943	$51.46	$974,807	12,039 Direct	-61.14%	Disposed	28.3% (price as of 2026-08-20)
Aug. 5, 2021	MXL	S	1,057	$52.04	$55,006	10,982 Direct	-8.78%	Disposed	26.8% (price as of 2026-08-20)
June 2, 2021	MXL	S	10,857	$38.34	$416,257	30,982 Direct	-25.95%	Disposed	72.1% (price as of 2026-08-20)
May 12, 2021	MXL	A	5,944	—	—	5,944 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 17, 2020	MXL	S	10,721	$27.26	$292,254	41,839 Direct	-20.40%	Disposed	142.1% (price as of 2026-08-20)
Sept. 10, 2020	MXL	A	1,165	—	—	1,165 Direct	—	Acquired	(price as of 2026-08-20)
June 8, 2020	MXL	A	7,890	—	—	7,890 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 13, 2020	MXL	M	10,857	$14.00	$151,998	52,560 Direct	+26.03%	Acquired	371.4% (price as of 2026-08-20)
Feb. 13, 2020	MXL	M	10,857	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 9, 2019	MXL	A	6,545	—	—	6,545 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 28, 2019	MXL	M	34,575	$7.45	$257,584	76,278 Direct	+82.91%	Acquired	785.9% (price as of 2026-08-20)
Feb. 28, 2019	MXL	S	34,575	$25.36	$876,822	41,703 Direct	-45.33%	Disposed	160.3% (price as of 2026-08-20)
Feb. 28, 2019	MXL	M	34,575	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 10, 2019	MXL	M	6,217	—	—	41,703 Direct	+17.52%	Acquired	(price as of 2026-08-20)
Jan. 10, 2019	MXL	M	6,217	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 25, 2018	MXL	A	8,748	—	—	8,748 Direct	—	Acquired	(price as of 2026-08-20)
May 25, 2017	MXL	M	21,149	$9.10	$192,456	56,635 Direct	+59.60%	Acquired	625.3% (price as of 2026-08-20)
May 25, 2017	MXL	S	21,149	$31.23	$660,483	35,486 Direct	-37.34%	Disposed	111.3% (price as of 2026-08-20)
May 25, 2017	MXL	M	21,149	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 24, 2017	MXL	A	4,138	—	—	4,138 Direct	—	Acquired	(price as of 2026-08-20)
May 18, 2017	MXL	S	30,766	$30.92	$951,285	35,486 Direct	-46.44%	Disposed	113.5% (price as of 2026-08-20)
March 29, 2017	MXL	J	21,149	—	—	21,149 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	MXL	J	21,149	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 29, 2017	MXL	J	10,857	—	—	10,857 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	MXL	J	10,857	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 29, 2017	MXL	J	34,575	—	—	34,575 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	MXL	J	34,575	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 29, 2017	MXL	J	6,217	—	—	6,217 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	MXL	J	6,217	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 29, 2017	MXL	C	66,252	—	—	66,252 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2017	MXL	C	66,252	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 1, 2016	MXL	A	6,217	—	—	6,217 Direct	—	Acquired	(price as of 2026-08-20)
May 19, 2015	MXL	A	10,721	—	—	66,252 Direct	+19.31%	Acquired	(price as of 2026-08-20)
Nov. 17, 2014	703361	A	6,784	—	—	40,977	—	—
May 20, 2014	MXL	A	13,221	—	—	55,531 Direct	+31.25%	Acquired	(price as of 2026-08-20)
Nov. 15, 2013	703361	A	11,941	—	—	34,193 Direct	+53.66%	Acquired
May 14, 2013	MXL	A	11,544	—	—	42,310 Direct	+37.52%	Acquired	(price as of 2026-08-20)
Nov. 15, 2012	703361	A	12,000	—	—	12,000 Direct	—	Acquired
Nov. 15, 2012	703361	A	8,834	—	—	22,252 Direct	+65.84%	Acquired
Aug. 10, 2012	MXL	A	14,134	—	—	30,766 Direct	+84.98%	Acquired	(price as of 2026-08-20)
May 10, 2012	MXL	A	16,632	—	—	16,632 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 15, 2011	703361	A	12,000	—	—	12,000 Direct	—	Acquired
Nov. 15, 2011	703361	A	8,418	—	—	13,418 Direct	+168.36%	Acquired
May 6, 2011	MXL	A	21,149	—	—	21,149 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 15, 2010	703361	A	10,000	—	—	10,000 Direct	—	Acquired
Nov. 15, 2010	703361	A	5,000	—	—	5,000 Direct	—	Acquired
March 29, 2010	MXL	J	34,575	—	—	34,575 Direct	—	Acquired	(price as of 2026-08-20)
March 29, 2010	MXL	J	34,575	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 23, 2010	MXL	A	10,857	—	—	10,857 Direct	—	Acquired	(price as of 2026-08-20)
Nov. 16, 2009	703361	A	40,000	—	—	40,000 Direct	—	Acquired
July 28, 2003	QCOM	M	160,000	$7.02	$1,123,200	327,723 Direct	+95.40%	Acquired	4516.4% (price as of 2026-08-20)
July 28, 2003	QCOM	D	160,000	$38.43	$6,148,800	167,723 Direct	-48.82%	Disposed	743.3% (price as of 2026-08-20)
July 28, 2003	QCOM	D	160,000	$38.33	$6,132,800	7,723 Direct	-95.40%	Disposed	745.5% (price as of 2026-08-20)
July 28, 2003	QCOM	M	160,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)

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
May 12, 2021	MXL	Restricted Stock Units	Common Stock (5,944)	—	—	5,944	Acquired
Sept. 10, 2020	MXL	Restricted Stock Units	Common Stock (1,165)	—	—	1,165	Acquired
June 8, 2020	MXL	Restricted Stock Units	Common Stock (7,890)	—	—	7,890	Acquired
Feb. 13, 2020	MXL	Stock Option (right to buy)	Common Stock (10,857)	$14.00	March 23, 2020	10,857	Disposed
May 9, 2019	MXL	Restricted Stock Units	Common Stock (6,545)	—	—	6,545	Acquired
Feb. 28, 2019	MXL	Stock Option (right to buy)	Common Stock (34,575)	$7.45	Oct. 26, 2019	34,575	Disposed
Jan. 10, 2019	MXL	Restricted Stock Units	Common Stock (6,217)	—	—	6,217	Disposed
May 25, 2018	MXL	Restricted Stock Units	Common Stock (8,748)	—	—	8,748	Acquired
May 25, 2017	MXL	Stock Option (Right to Buy)	Common Stock (21,149)	$9.10	May 6, 2018	21,149	Disposed
May 24, 2017	MXL	Restricted Stock Units	Common Stock (4,138)	—	—	4,138	Acquired
March 29, 2017	MXL	Stock Option (Right to Buy)	Common Stock (21,149)	$9.10	May 6, 2018	21,149	Acquired
March 29, 2017	MXL	Stock Option (Right to Buy)	Class A Common Stock (21,149)	$9.10	May 6, 2018	21,149	Disposed
March 29, 2017	MXL	Stock Option (Right to Buy)	Common Stock (10,857)	$14.00	March 23, 2020	10,857	Acquired
March 29, 2017	MXL	Stock Option (Right to Buy)	Class A Common Stock (10,857)	$14.00	March 23, 2020	10,857	Disposed
March 29, 2017	MXL	Stock Option (Right to Buy)	Common Stock (34,575)	$7.45	Oct. 26, 2019	34,575	Acquired
March 29, 2017	MXL	Stock Option (Right to Buy)	Class B Common Stock (34,575)	$7.45	Oct. 26, 2019	34,575	Disposed
March 29, 2017	MXL	Restricted Stock Units	Common Stock (6,217)	—	—	6,217	Acquired
March 29, 2017	MXL	Restricted Stock Units	Class A Common Stock (6,217)	—	—	6,217	Disposed
June 1, 2016	MXL	Restricted Stock Units	Class A Common Stock (par value $0.0001) (6,217)	—	—	6,217	Acquired
Nov. 15, 2012	703361	Non-Qualified Stock Option (right to buy)	Common Stock (12,000)	$5.66	Nov. 15, 2019	12,000	Acquired
Nov. 15, 2011	703361	Non-Qualified Stock Option (right to buy)	Common Stock (12,000)	$5.94	Nov. 15, 2018	12,000	Acquired
May 6, 2011	MXL	Stock Option (Right to Buy)	Class A Common Stock (par value $0.0001) (21,149)	$9.10	May 6, 2018	21,149	Acquired
Nov. 15, 2010	703361	Non-Qualified Stock Option (right to buy)	Common Stock (10,000)	$6.14	Nov. 15, 2017	10,000	Acquired
March 29, 2010	MXL	Stock Option (right to buy)	Class B Common Stock [F3] (34,575)	$7.45	Oct. 27, 2019	34,575	Acquired
March 29, 2010	MXL	Stock Option (right to buy)	Common Stock (34,575)	$7.45	Oct. 27, 2019	34,575	Disposed
March 23, 2010	MXL	Stock Option (right to buy)	Class A Common Stock ($0.0001 par value) (10,857)	$14.00	March 23, 2020	10,857	Acquired
Nov. 16, 2009	703361	Non-Qualified Stock Option (right to buy)	Common Stock (40,000)	$6.00	Nov. 16, 2016	40,000	Acquired
July 28, 2003	QCOM	Non-Qualified Stock Option (right to buy)	Common Stock (160,000)	$7.02	July 16, 2008	160,000	Disposed

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
March 23, 2010	MXL	Stock Option (right to buy)→ Common Stock [F2,F3] (34,575)	34,575	Direct