Seth W Brennan

CIK 1201027 · View on SEC EDGAR ↗

Insider

First SEC filing: Feb. 2, 2018 · Latest: Feb. 2, 2018

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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.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 51 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

51 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 29, 2019	APAM	A	6,571	—	—	29,883 Direct	+28.19%	Acquired	(price as of 2026-08-21)
Feb. 1, 2018	APAM	A	3,784	—	—	23,312 Direct	+19.38%	Acquired	(price as of 2026-08-21)
Jan. 27, 2017	APAM	A	5,339	—	—	19,528 Direct	+37.63%	Acquired	(price as of 2026-08-21)
Jan. 26, 2016	APAM	A	4,831	—	—	14,189 Direct	+51.62%	Acquired	(price as of 2026-08-21)
Sept. 10, 2015	APAM	P	6,250	$39.08	$244,250	6,250 Indirect	—	Acquired	8.4% (price as of 2026-08-21)
Sept. 10, 2015	APAM	P	6,250	$39.08	$244,250	9,358 Direct	+201.09%	Acquired	8.4% (price as of 2026-08-21)
Jan. 30, 2015	APAM	A	3,108	—	—	3,108 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 12, 2006	MGRD	A	52,521	$102.83	$5,400,734	52,521 Direct	—	Acquired	-85.8% (price as of 2026-08-21)
Nov. 6, 2006	MGRD	M	53,437	$33.97	$1,815,255	17,813 Direct	-75.00%	Disposed	-56.9% (price as of 2026-08-21)
Nov. 6, 2006	MGRD	S	53,437	$101.05	$5,399,809	36,985 Direct	-59.10%	Disposed	-85.5% (price as of 2026-08-21)
Nov. 6, 2006	MGRD	M	53,437	$33.97	$1,815,255	36,985 Direct	—	Acquired	-56.9% (price as of 2026-08-21)
July 28, 2006	MGRD	M	37,749	$27.01	$1,019,600	0 Direct	-100.00%	Disposed	-45.8% (price as of 2026-08-21)
July 28, 2006	MGRD	M	25,805	$46.69	$1,204,835	0 Direct	-100.00%	Disposed	-68.7% (price as of 2026-08-21)
July 28, 2006	MGRD	S	63,554	$90.81	$5,771,339	36,985 Direct	-63.21%	Disposed	-83.9% (price as of 2026-08-21)
July 28, 2006	MGRD	M	37,749	$27.01	$1,019,600	36,985 Direct	—	Acquired	-45.8% (price as of 2026-08-21)
July 28, 2006	MGRD	M	25,805	$46.69	$1,204,835	36,985 Direct	+230.81%	Acquired	-68.7% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	31,250	$38.73	$1,210,312	0 Direct	-100.00%	Disposed	-62.2% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	33,194	$19.33	$641,640	0 Direct	-100.00%	Disposed	-24.3% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	27,945	$46.69	$1,304,752	25,805 Direct	-51.99%	Disposed	-68.7% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	G	3,260	—	—	36,985 Direct	-8.10%	Disposed	(price as of 2026-08-21)
Jan. 30, 2006	MGRD	F	1,081	$92.34	$99,820	36,985 Direct	-2.84%	Disposed	-84.2% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	S	90,249	$92.15	$8,316,445	36,985 Direct	-70.93%	Disposed	-84.1% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	31,250	$38.73	$1,210,312	36,985 Direct	+544.90%	Acquired	-62.2% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	33,194	$19.33	$641,640	36,985 Direct	+875.60%	Acquired	-24.3% (price as of 2026-08-21)
Jan. 30, 2006	MGRD	M	27,945	$46.69	$1,304,752	36,985 Direct	+309.13%	Acquired	-68.7% (price as of 2026-08-21)
Dec. 30, 2005	MGRD	A	24,922	$80.25	$1,999,990	39,186 Direct	+174.72%	Acquired	-81.8% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	47,500	$38.73	$1,839,675	14,264 Direct	—	Acquired	-62.2% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	35,000	$46.69	$1,634,150	14,264 Direct	—	Acquired	-68.7% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	26,000	$27.01	$702,260	14,264 Direct	—	Acquired	-45.8% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	S	108,500	$72.39	$7,854,315	14,264 Direct	-88.38%	Disposed	-79.8% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	47,500	$38.73	$1,839,675	31,250 Direct	-60.32%	Disposed	-62.2% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	35,000	$46.69	$1,634,150	53,750 Direct	-39.44%	Disposed	-68.7% (price as of 2026-08-21)
Aug. 2, 2005	MGRD	M	26,000	$27.01	$702,260	37,750 Direct	-40.78%	Disposed	-45.8% (price as of 2026-08-21)
May 3, 2005	MGRD	M	3,129	$31.96	$100,003	46,871 Direct	-6.26%	Disposed	-54.2% (price as of 2026-08-21)
May 3, 2005	MGRD	F	1,612	$62.00	$99,944	14,264 Direct	-10.15%	Disposed	-76.4% (price as of 2026-08-21)
May 3, 2005	MGRD	M	3,129	$31.96	$100,003	14,264 Direct	+28.10%	Acquired	-54.2% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	7,500	$27.01	$202,575	63,750 Direct	-10.53%	Disposed	-45.8% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	5,000	$46.69	$233,450	88,750 Direct	-5.33%	Disposed	-68.7% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	15,000	$38.73	$580,950	78,750 Direct	-16.00%	Disposed	-62.2% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	10,000	$31.96	$319,600	50,000 Direct	-16.67%	Disposed	-54.2% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	10,000	$35.42	$354,200	72,500 Direct	-12.12%	Disposed	-58.7% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	20,868	$19.33	$403,378	33,194 Direct	-38.60%	Disposed	-24.3% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	F	1,705	$66.50	$113,382	12,747 Direct	-11.80%	Disposed	-78.0% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	S	62,500	$66.54	$4,158,750	12,747 Direct	-83.06%	Disposed	-78.0% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	7,500	$27.01	$202,575	12,747 Direct	+142.94%	Acquired	-45.8% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	5,000	$46.69	$233,450	12,747 Direct	+64.54%	Acquired	-68.7% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	15,000	$38.73	$580,950	12,747 Direct	—	Acquired	-62.2% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	10,000	$31.96	$319,600	12,747 Direct	+364.03%	Acquired	-54.2% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	10,000	$35.42	$354,200	12,747 Direct	+364.03%	Acquired	-58.7% (price as of 2026-08-21)
Dec. 15, 2004	MGRD	M	20,868	$19.33	$403,378	12,747 Direct	—	Acquired	-24.3% (price as of 2026-08-21)
Nov. 30, 2004	MGRD	A	115,000	$63.38	$7,288,700	115,000 Direct	—	Acquired	-76.9% (price as of 2026-08-21)
July 27, 2004	MGRD	A	115,000	$45.27	$5,206,050	806,562 Direct	+16.63%	Acquired	-67.7% (price as of 2026-08-21)
Dec. 10, 2003	MGRD	A	50,000	$66.52	$3,326,000	249,791 Direct	+25.03%	Acquired	-78.0% (price as of 2026-08-21)
Oct. 28, 2003	MGRD	S	12,171	$70.32	$855,865	5,723 Direct	-68.02%	Disposed	-79.2% (price as of 2026-08-21)
Oct. 27, 2003	MGRD	M	20,209	$29.00	$586,061	177,679 Direct	-10.21%	Disposed	-49.6% (price as of 2026-08-21)
Oct. 27, 2003	MGRD	M	5,000	$53.12	$265,600	177,679 Direct	-2.74%	Disposed	-72.5% (price as of 2026-08-21)
Oct. 27, 2003	MGRD	M	7,500	$34.63	$259,725	177,679 Direct	-4.05%	Disposed	-57.8% (price as of 2026-08-21)
Oct. 27, 2003	MGRD	M	2,888	$34.63	$100,011	5,723 Direct	+101.87%	Acquired	-57.8% (price as of 2026-08-21)
Oct. 27, 2003	MGRD	S	17,650	$69.86	$1,233,029	5,723 Direct	-75.51%	Disposed	-79.1% (price as of 2026-08-21)
July 24, 2003	MGRD	A	60,000	$65.25	$3,915,000	168,750 Direct	+55.17%	Acquired	-77.6% (price as of 2026-08-21)

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
Dec. 12, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (52,521)	$102.83	Dec. 12, 2013	52,521	Acquired
Nov. 6, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (53,437)	$33.97	Dec. 10, 2009	53,437	Disposed
July 28, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (37,749)	$27.01	July 23, 2009	37,749	Disposed
July 28, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (25,805)	$46.69	Dec. 19, 2008	25,805	Disposed
Jan. 30, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (31,250)	$38.73	July 24, 2008	31,250	Disposed
Jan. 30, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (33,194)	$19.33	Dec. 2, 2009	33,194	Disposed
Jan. 30, 2006	MGRD	Employee Stock Option (Right to Buy)	Common Stock (27,945)	$46.69	Dec. 19, 2008	27,945	Disposed
Aug. 2, 2005	MGRD	Employee Stock Option (Right to Buy)	Common Stock (47,500)	$38.73	July 24, 2008	47,500	Disposed
Aug. 2, 2005	MGRD	Employee Stock Option (Right to Buy)	Common Stock (35,000)	$46.69	Dec. 19, 2008	35,000	Disposed
Aug. 2, 2005	MGRD	Employee Stock Option (Right to Buy)	Common Stock (26,000)	$27.01	July 23, 2009	26,000	Disposed
May 3, 2005	MGRD	Employee Stock Option (Right to Buy)	Common Stock (3,129)	$31.96	Dec. 19, 2010	3,129	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (7,500)	$27.01	July 23, 2009	7,500	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (5,000)	$46.69	Dec. 19, 2008	5,000	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (15,000)	$38.73	July 24, 2008	15,000	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (10,000)	$31.96	Dec. 19, 2010	10,000	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (10,000)	$35.42	Aug. 14, 2010	10,000	Disposed
Dec. 15, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (20,868)	$19.33	Dec. 2, 2009	20,868	Disposed
Nov. 30, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (115,000)	$63.38	Nov. 30, 2014	115,000	Acquired
July 27, 2004	MGRD	Employee Stock Option (Right to Buy)	Common Stock (115,000)	$45.27	July 27, 2011	115,000	Acquired
Dec. 10, 2003	MGRD	Employee Stock Option (Right to Buy)	Common Stock (50,000)	$66.52	Dec. 31, 2010	50,000	Acquired
Oct. 27, 2003	MGRD	Employee Stock Option (Right to Buy)	Common Stock (20,209)	$29.00	Dec. 2, 2009	20,209	Disposed
Oct. 27, 2003	MGRD	Employee Stock Option (Right to Buy)	Common Stock (5,000)	$53.12	Aug. 14, 2010	5,000	Disposed
Oct. 27, 2003	MGRD	Employee Stock Option (Right to Buy)	Common Stock (7,500)	$34.63	April 16, 2008	7,500	Disposed
July 24, 2003	MGRD	Employee Stock Option (Right to Buy)	Common Stock (60,000)	$65.25	July 24, 2010	60,000	Acquired

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