Charles L Gummer

Insider

First SEC filing: Nov. 2, 2011 · Latest: Nov. 2, 2011

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

MTDR buying Feb. 7, 2012

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 49 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

49 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 6, 2012	MTDR	A	4,000	—	—	26,500 Direct	+17.78%	Acquired	(price as of 2026-08-20)
April 11, 2012	MTDR	A	1,701	—	—	24,201 Direct	+7.56%	Acquired	(price as of 2026-08-20)
Feb. 7, 2012	MTDR	P	22,000	$12.00	$264,000	22,500 Direct	+4400.00%	Acquired	400.5% (price as of 2026-08-20)
Oct. 31, 2011	28412	F	12,285	$25.55	$313,882	85,894 Direct	-12.51%	Disposed
Feb. 16, 2011	28412	S	486	$39.54	$19,216	97,965 Direct	-0.49%	Disposed
Feb. 16, 2011	28412	S	400	$39.53	$15,812	98,451 Direct	-0.40%	Disposed
Feb. 16, 2011	28412	S	100	$39.52	$3,952	98,851 Direct	-0.10%	Disposed
Feb. 16, 2011	28412	S	1,161	$39.52	$45,883	98,951 Direct	-1.16%	Disposed
Feb. 16, 2011	28412	S	2,853	$39.51	$112,722	100,112 Direct	-2.77%	Disposed
Feb. 15, 2011	28412	F	1,356	$39.74	$53,887	102,965 Direct	-1.30%	Disposed
Feb. 5, 2011	28412	M	9,253	—	—	0 Direct	-100.00%	Disposed
Feb. 5, 2011	28412	D	9,253	$38.60	$357,166	104,321 Direct	-8.15%	Disposed
Feb. 5, 2011	28412	M	9,253	—	—	113,574 Direct	+8.87%	Acquired
Jan. 25, 2011	28412	A	15,600	—	—	104,321 Direct	+17.58%	Acquired
Jan. 7, 2011	28412	A	341	—	—	9,253 Direct	+3.83%	Acquired
Dec. 24, 2010	28412	A	352	—	—	8,911 Direct	+4.11%	Acquired
Dec. 10, 2010	28412	A	363	—	—	8,559 Direct	+4.43%	Acquired
Nov. 26, 2010	28412	A	408	—	—	8,195 Direct	+5.24%	Acquired
Nov. 12, 2010	28412	A	399	—	—	7,787 Direct	+5.40%	Acquired
Oct. 29, 2010	28412	A	416	—	—	7,388 Direct	+5.97%	Acquired
Oct. 15, 2010	28412	A	390	—	—	6,972 Direct	+5.93%	Acquired
Oct. 1, 2010	28412	A	401	—	—	6,582 Direct	+6.49%	Acquired
Sept. 17, 2010	28412	A	404	—	—	6,181 Direct	+6.99%	Acquired
Sept. 3, 2010	28412	A	403	—	—	5,777 Direct	+7.50%	Acquired
Aug. 20, 2010	28412	A	421	—	—	5,374 Direct	+8.50%	Acquired
Aug. 6, 2010	28412	A	401	—	—	4,953 Direct	+8.81%	Acquired
July 27, 2010	28412	A	18,500	—	—	18,500 Direct	—	Acquired
July 27, 2010	28412	A	9,500	—	—	88,636 Direct	+12.00%	Acquired
July 23, 2010	28412	A	395	—	—	4,552 Direct	+9.50%	Acquired
July 9, 2010	28412	A	380	—	—	4,157 Direct	+10.06%	Acquired
June 25, 2010	28412	A	387	—	—	3,777 Direct	+11.42%	Acquired
June 11, 2010	28412	A	398	—	—	3,390 Direct	+13.30%	Acquired
May 28, 2010	28412	A	391	—	—	2,992 Direct	+15.03%	Acquired
May 14, 2010	28412	A	353	—	—	2,601 Direct	+15.70%	Acquired
April 30, 2010	28412	A	355	—	—	2,248 Direct	+18.75%	Acquired
April 21, 2010	28412	F	1,058	$43.40	$45,917	79,113 Direct	-1.32%	Disposed
April 16, 2010	28412	A	365	—	—	1,894 Direct	+23.87%	Acquired
April 2, 2010	28412	A	392	—	—	1,529 Direct	+34.48%	Acquired
March 19, 2010	28412	A	383	—	—	1,136 Direct	+50.86%	Acquired
March 5, 2010	28412	A	370	—	—	753 Direct	+96.61%	Acquired
Feb. 22, 2010	28412	S	500	$36.35	$18,175	80,143 Direct	-0.62%	Disposed
Feb. 22, 2010	28412	S	2,000	$36.35	$72,700	80,643 Direct	-2.42%	Disposed
Feb. 22, 2010	28412	S	1,400	$36.15	$50,610	82,643 Direct	-1.67%	Disposed
Feb. 22, 2010	28412	S	1,100	$36.15	$39,765	84,043 Direct	-1.29%	Disposed
Feb. 19, 2010	28412	A	383	—	—	383 Direct	—	Acquired
Nov. 17, 2009	28412	A	6,450	$28.76	$185,502	85,108 Direct	+8.20%	Acquired
April 16, 2009	28412	F	1,058	$20.32	$21,499	78,572 Direct	-1.33%	Disposed
Feb. 9, 2009	28412	S	300	$19.18	$5,754	79,573 Direct	-0.38%	Disposed
Jan. 27, 2009	28412	A	23,300	—	—	23,300 Direct	—	Acquired
Jan. 27, 2009	28412	A	12,100	—	—	79,873 Direct	+17.85%	Acquired
Nov. 5, 2008	28412	G	100	—	—	67,445 Direct	-0.15%	Disposed
Nov. 4, 2008	28412	S	600	$28.73	$17,238	67,545 Direct	-0.88%	Disposed
Nov. 4, 2008	28412	S	400	$28.72	$11,488	68,145 Direct	-0.58%	Disposed
Nov. 4, 2008	28412	S	700	$28.71	$20,097	68,545 Direct	-1.01%	Disposed
Nov. 4, 2008	28412	S	2,300	$28.70	$66,010	69,245 Direct	-3.21%	Disposed
Nov. 4, 2008	28412	S	3,000	$28.69	$86,070	71,545 Direct	-4.02%	Disposed
Nov. 4, 2008	28412	S	3,900	$28.68	$111,852	74,545 Direct	-4.97%	Disposed
Nov. 4, 2008	28412	S	2,400	$28.67	$68,808	78,445 Direct	-2.97%	Disposed
Nov. 4, 2008	28412	S	2,900	$28.66	$83,114	80,845 Direct	-3.46%	Disposed
Nov. 4, 2008	28412	S	1,600	$28.65	$45,840	83,745 Direct	-1.87%	Disposed
Nov. 4, 2008	28412	S	2,200	$28.64	$63,008	85,345 Direct	-2.51%	Disposed
Jan. 22, 2008	28412	A	25,000	—	—	25,000 Direct	—	Acquired
Jan. 22, 2008	28412	A	6,400	—	—	83,521 Direct	+8.30%	Acquired
May 23, 2007	28412	G	300	—	—	76,403 Direct	-0.39%	Disposed
May 18, 2007	28412	S	1,000	$63.49	$63,490	76,703 Direct	-1.29%	Disposed
May 18, 2007	28412	S	1,600	$63.48	$101,568	77,703 Direct	-2.02%	Disposed
May 18, 2007	28412	S	700	$63.47	$44,429	79,303 Direct	-0.87%	Disposed
May 18, 2007	28412	S	700	$63.46	$44,422	80,003 Direct	-0.87%	Disposed
May 18, 2007	28412	S	800	$63.45	$50,760	80,703 Direct	-0.98%	Disposed
May 18, 2007	28412	S	200	$63.44	$12,688	81,503 Direct	-0.24%	Disposed
April 19, 2007	28412	M	18,000	—	—	0 Direct	-100.00%	Disposed
April 19, 2007	28412	S	200	$62.00	$12,400	84,607 Direct	-0.24%	Disposed
April 19, 2007	28412	S	300	$62.01	$18,603	84,807 Direct	-0.35%	Disposed
April 19, 2007	28412	S	900	$62.02	$55,818	85,107 Direct	-1.05%	Disposed
April 19, 2007	28412	S	400	$62.03	$24,812	86,007 Direct	-0.46%	Disposed
April 19, 2007	28412	S	800	$62.04	$49,632	86,407 Direct	-0.92%	Disposed
April 19, 2007	28412	S	457	$62.05	$28,357	87,207 Direct	-0.52%	Disposed
April 19, 2007	28412	S	343	$62.06	$21,287	87,664 Direct	-0.39%	Disposed
April 19, 2007	28412	S	700	$62.07	$43,449	88,007 Direct	-0.79%	Disposed
April 19, 2007	28412	S	500	$62.08	$31,040	88,707 Direct	-0.56%	Disposed
April 19, 2007	28412	S	600	$62.09	$37,254	89,207 Direct	-0.67%	Disposed
April 19, 2007	28412	S	900	$62.10	$55,890	89,807 Direct	-0.99%	Disposed
April 19, 2007	28412	S	1,800	$62.11	$111,798	90,707 Direct	-1.95%	Disposed
April 19, 2007	28412	S	2,200	$62.12	$136,664	92,507 Direct	-2.32%	Disposed
April 19, 2007	28412	S	2,000	$62.13	$124,260	94,707 Direct	-2.07%	Disposed
April 19, 2007	28412	S	1,400	$62.14	$86,996	96,707 Direct	-1.43%	Disposed
April 19, 2007	28412	S	500	$62.15	$31,075	98,107 Direct	-0.51%	Disposed
April 19, 2007	28412	S	100	$62.16	$6,216	98,607 Direct	-0.10%	Disposed
April 19, 2007	28412	S	100	$62.16	$6,216	98,707 Direct	-0.10%	Disposed
April 19, 2007	28412	S	767	$62.17	$47,684	98,807 Direct	-0.77%	Disposed
April 19, 2007	28412	S	1,333	$62.18	$82,886	99,574 Direct	-1.32%	Disposed
April 19, 2007	28412	S	700	$62.19	$43,533	100,907 Direct	-0.69%	Disposed
April 19, 2007	28412	S	100	$62.25	$6,225	101,607 Direct	-0.10%	Disposed
April 19, 2007	28412	S	500	$62.26	$31,130	101,707 Direct	-0.49%	Disposed
April 19, 2007	28412	S	400	$62.27	$24,908	102,207 Direct	-0.39%	Disposed
April 19, 2007	28412	M	18,000	$40.25	$724,500	102,607 Direct	+21.27%	Acquired
April 17, 2007	28412	J	1,323	$62.56	$82,767	84,607 Direct	-1.54%	Disposed
Jan. 23, 2007	28412	A	25,000	—	—	25,000 Direct	—	Acquired
Jan. 23, 2007	28412	A	6,000	—	—	85,672 Direct	+7.53%	Acquired
April 28, 2006	28412	J	926	$56.87	$52,662	78,993 Direct	-1.16%	Disposed

Showing latest 100 of 144 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. 5, 2011	28412	Phantom Stock Units [F4]	Common Stock (9,253)	—	Feb. 5, 2011	9,253	Disposed
Jan. 7, 2011	28412	Phantom Stock Units [F3]	Common Stock (341)	—	Feb. 5, 2011	341	Acquired
Dec. 24, 2010	28412	Phantom Stock Units [F3]	Common Stock (352)	—	Feb. 5, 2011	352	Acquired
Dec. 10, 2010	28412	Phantom Stock Units [F3]	Common Stock (363)	—	Feb. 5, 2011	363	Acquired
Nov. 26, 2010	28412	Phantom Stock Units [F3]	Common Stock (408)	—	Feb. 5, 2011	408	Acquired
Nov. 12, 2010	28412	Phantom Stock Units [F3]	Common Stock (399)	—	Feb. 5, 2011	399	Acquired
Oct. 29, 2010	28412	Phantom Stock Units [F3]	Common Stock (416)	—	Feb. 5, 2011	416	Acquired
Oct. 15, 2010	28412	Phantom Stock Units [F3]	Common Stock (390)	—	Feb. 5, 2011	390	Acquired
Oct. 1, 2010	28412	Phantom Stock Units [F3]	Common Stock (401)	—	Feb. 5, 2011	401	Acquired
Sept. 17, 2010	28412	Phantom Stock Units [F3]	Common Stock (404)	—	Feb. 5, 2011	404	Acquired
Sept. 3, 2010	28412	Phantom Stock Units [F3]	Common Stock (403)	—	Feb. 5, 2011	403	Acquired
Aug. 20, 2010	28412	Phantom Stock Units [F3]	Common Stock (421)	—	Feb. 5, 2011	421	Acquired
Aug. 6, 2010	28412	Phantom Stock Units [F3]	Common Stock (401)	—	Feb. 5, 2011	401	Acquired
July 27, 2010	28412	Employee Stock Option (right to buy)	Common Stock (18,500)	$39.16	July 27, 2020	18,500	Acquired
July 23, 2010	28412	Phantom Stock Units [F3]	Common Stock (395)	—	Feb. 5, 2011	395	Acquired
July 9, 2010	28412	Phantom Stock Units [F3]	Common Stock (380)	—	Feb. 5, 2011	380	Acquired
June 25, 2010	28412	Phantom Stock Units [F3]	Common Stock (387)	—	Feb. 5, 2011	387	Acquired
June 11, 2010	28412	Phantom Stock Units [F3]	Common Stock (398)	—	Feb. 5, 2011	398	Acquired
May 28, 2010	28412	Phantom Stock Units [F3]	Common Stock (391)	—	Feb. 5, 2011	391	Acquired
May 14, 2010	28412	Phantom Stock Units [F3]	Common Stock (353)	—	Feb. 5, 2011	353	Acquired
April 30, 2010	28412	Phantom Stock Units [F3]	Common Stock (355)	—	Feb. 5, 2011	355	Acquired
April 16, 2010	28412	Phantom Stock Units [F3]	Common Stock (365)	—	Feb. 5, 2011	365	Acquired
April 2, 2010	28412	Phantom Stock Units [F3]	Common Stock (392)	—	Feb. 5, 2011	392	Acquired
March 19, 2010	28412	Phantom Stock Units [F3]	Common Stock (383)	—	Feb. 5, 2011	383	Acquired
March 5, 2010	28412	Phantom Stock Units [F3]	Common Stock (370)	—	Feb. 5, 2011	370	Acquired
Feb. 19, 2010	28412	Phantom Stock Units [F3]	Common Stock (383)	—	Feb. 5, 2011	383	Acquired
Jan. 27, 2009	28412	Employee Stock Option (right to buy)	Common Stock (23,300)	$17.32	Jan. 27, 2019	23,300	Acquired
Jan. 22, 2008	28412	Employee Stock Option (right to buy)	Common Stock (25,000)	$37.45	Jan. 22, 2018	25,000	Acquired
April 19, 2007	28412	Employee Stock Option (right to buy)	Common Stock (18,000)	$40.25	April 20, 2007	18,000	Disposed
Jan. 23, 2007	28412	Employee Stock Option (right to buy)	Common Stock (25,000)	$58.98	Jan. 23, 2017	25,000	Acquired
March 6, 2006	28412	Employee Stock Option (right to buy)	Common Stock (18,000)	$25.42	April 14, 2006	18,000	Acquired
Feb. 15, 2006	28412	Employee Stock Option (right to buy)	Common Stock (20,500)	$56.47	Feb. 15, 2016	20,500	Acquired
April 21, 2005	28412	Employee Stock Option (right to buy)	Common Stock (25,000)	$54.99	April 21, 2015	25,000	Acquired
Feb. 23, 2005	28412	Employee Stock Option (right to buy)	Common Stock (6,500)	$18.59	April 18, 2005	6,500	Disposed
Nov. 12, 2004	28412	Employee Stock Option (right to buy)	Common Stock (16,500)	$18.59	April 18, 2005	10,000	Disposed
April 16, 2004	28412	Employee Stock Option (right to buy)	Common Stock (25,000)	$52.50	April 16, 2014	25,000	Acquired
Feb. 17, 2004	28412	Employee Stock Option (right to buy)	Common Stock (4,250)	$18.00	April 19, 2004	4,250	Disposed
Feb. 12, 2004	28412	Employee Stock Option (right to buy)	Common Stock (5,000)	$18.00	April 19, 2004	5,000	Disposed
Jan. 23, 2004	28412	Employee Stock Option (right to buy)	Common Stock (5,000)	$18.00	April 19, 2004	5,000	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
Feb. 1, 2012	MTDR	Class A Common Stock	500	Direct