Timothy T. Griffith

Insider

First SEC filing: Aug. 3, 2011 · Latest: Aug. 3, 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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 83 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

83 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 14, 2021	MPC	A	6,331	—	—	71,131 Direct	+9.77%	Acquired	(price as of 2026-08-19)
May 14, 2021	MPC	A	5,457	—	—	64,800 Direct	+9.20%	Acquired	(price as of 2026-08-19)
May 14, 2021	MPC	F	3,764	$59.61	$224,372	59,343 Direct	-5.96%	Disposed	507.3% (price as of 2026-08-19)
March 1, 2021	MPC	F	1,156	$55.88	$64,597	63,107 Direct	-1.80%	Disposed	547.8% (price as of 2026-08-19)
Jan. 29, 2021	MPC	A	4,120	—	—	64,263 Direct	+6.85%	Acquired	(price as of 2026-08-19)
Dec. 28, 2020	MPC	F	2,470	$40.78	$100,727	60,143 Direct	-3.94%	Disposed	787.7% (price as of 2026-08-19)
Dec. 28, 2020	MPC	F	1,046	$40.78	$42,656	62,613 Direct	-1.64%	Disposed	787.7% (price as of 2026-08-19)
March 2, 2020	MPC	A	91,198	—	—	91,198 Direct	—	Acquired	(price as of 2026-08-19)
March 2, 2020	MPC	A	12,446	—	—	63,659 Direct	+24.30%	Acquired	(price as of 2026-08-19)
March 2, 2020	MPC	F	1,235	$46.95	$57,983	51,213 Direct	-2.35%	Disposed	671.0% (price as of 2026-08-19)
March 2, 2020	MPC	F	1,046	$46.95	$49,110	52,448 Direct	-1.96%	Disposed	671.0% (price as of 2026-08-19)
March 2, 2020	MPC	F	1,186	$46.95	$55,683	53,494 Direct	-2.17%	Disposed	671.0% (price as of 2026-08-19)
Jan. 27, 2020	MPC	A	2,926	—	—	54,680 Direct	+5.65%	Acquired	(price as of 2026-08-19)
March 1, 2019	MPLX	A	9,645	—	—	36,846 Direct	+35.46%	Acquired	(price as of 2026-08-19)
March 1, 2019	MPLX	F	1,173	$33.24	$38,991	27,201 Direct	-4.13%	Disposed	77.8% (price as of 2026-08-19)
March 1, 2019	MPLX	F	962	$33.24	$31,977	28,374 Direct	-3.28%	Disposed	77.8% (price as of 2026-08-19)
March 1, 2019	MPLX	F	1,102	$33.24	$36,630	29,336 Direct	-3.62%	Disposed	77.8% (price as of 2026-08-19)
March 1, 2019	MPC	A	53,557	—	—	53,557 Direct	—	Acquired	(price as of 2026-08-19)
March 1, 2019	MPC	A	8,169	—	—	51,754 Direct	+18.74%	Acquired	(price as of 2026-08-19)
March 1, 2019	MPC	F	1,011	$62.66	$63,349	43,585 Direct	-2.27%	Disposed	477.7% (price as of 2026-08-19)
March 1, 2019	MPC	F	1,147	$62.66	$71,871	44,596 Direct	-2.51%	Disposed	477.7% (price as of 2026-08-19)
March 1, 2019	MPC	F	1,206	$62.66	$75,568	45,743 Direct	-2.57%	Disposed	477.7% (price as of 2026-08-19)
Jan. 28, 2019	MPC	A	2,063	—	—	46,949 Direct	+4.60%	Acquired	(price as of 2026-08-19)
Jan. 25, 2019	MPLX	A	1,045	—	—	30,438 Direct	+3.56%	Acquired	(price as of 2026-08-19)
March 1, 2018	MPC	A	38,688	—	—	38,688 Direct	—	Acquired	(price as of 2026-08-19)
March 1, 2018	MPC	A	6,915	—	—	44,886 Direct	+18.21%	Acquired	(price as of 2026-08-19)
March 1, 2018	MPC	F	1,147	$64.86	$74,394	37,971 Direct	-2.93%	Disposed	458.1% (price as of 2026-08-19)
March 1, 2018	MPC	F	1,220	$64.86	$79,129	39,118 Direct	-3.02%	Disposed	458.1% (price as of 2026-08-19)
March 1, 2018	MPC	F	545	$64.86	$35,349	40,338 Direct	-1.33%	Disposed	458.1% (price as of 2026-08-19)
March 1, 2018	MPLX	A	8,026	—	—	29,393 Direct	+37.56%	Acquired	(price as of 2026-08-19)
March 1, 2018	MPLX	F	962	$34.66	$33,343	21,367 Direct	-4.31%	Disposed	70.5% (price as of 2026-08-19)
March 1, 2018	MPLX	F	1,102	$34.66	$38,195	22,329 Direct	-4.70%	Disposed	70.5% (price as of 2026-08-19)
March 1, 2018	MPLX	F	321	$34.66	$11,126	23,431 Direct	-1.35%	Disposed	70.5% (price as of 2026-08-19)
Jan. 31, 2018	MPC	A	1,773	—	—	40,883 Direct	+4.53%	Acquired	(price as of 2026-08-19)
Jan. 31, 2018	MPLX	A	526	—	—	23,752 Direct	+2.26%	Acquired	(price as of 2026-08-19)
March 1, 2017	MPC	A	56,180	—	—	56,180 Direct	—	Acquired	(price as of 2026-08-19)
March 1, 2017	MPC	A	7,845	—	—	39,110 Direct	+25.09%	Acquired	(price as of 2026-08-19)
March 1, 2017	MPC	F	1,431	$50.74	$72,609	31,265 Direct	-4.38%	Disposed	613.4% (price as of 2026-08-19)
March 1, 2017	MPC	F	874	$50.74	$44,347	32,696 Direct	-2.60%	Disposed	613.4% (price as of 2026-08-19)
March 1, 2017	MPC	F	260	$50.74	$13,192	33,570 Direct	-0.77%	Disposed	613.4% (price as of 2026-08-19)
March 1, 2017	MPLX	A	6,576	—	—	23,226 Direct	+39.50%	Acquired	(price as of 2026-08-19)
March 1, 2017	MPLX	F	1,168	$37.87	$44,232	16,650 Direct	-6.56%	Disposed	56.1% (price as of 2026-08-19)
March 1, 2017	MPLX	F	340	$37.87	$12,876	17,818 Direct	-1.87%	Disposed	56.1% (price as of 2026-08-19)
March 1, 2017	MPLX	F	144	$37.87	$5,453	18,158 Direct	-0.79%	Disposed	56.1% (price as of 2026-08-19)
Feb. 1, 2017	MPLX	A	92	—	—	18,302 Direct	+0.51%	Acquired	(price as of 2026-08-19)
Feb. 1, 2017	MPC	A	793	—	—	33,830 Direct	+2.40%	Acquired	(price as of 2026-08-19)
March 1, 2016	MPLX	A	7,539	—	—	18,210 Direct	+70.65%	Acquired	(price as of 2026-08-19)
March 1, 2016	MPLX	F	233	$26.04	$6,067	10,671 Direct	-2.14%	Disposed	127.0% (price as of 2026-08-19)
March 1, 2016	MPLX	F	99	$26.04	$2,578	10,904 Direct	-0.90%	Disposed	127.0% (price as of 2026-08-19)
March 1, 2016	MPC	A	64,193	—	—	64,193 Direct	—	Acquired	(price as of 2026-08-19)
March 1, 2016	MPC	A	9,241	—	—	33,037 Direct	+38.83%	Acquired	(price as of 2026-08-19)
March 1, 2016	MPC	F	601	$34.44	$20,698	23,796 Direct	-2.46%	Disposed	951.1% (price as of 2026-08-19)
March 1, 2016	MPC	F	260	$34.44	$8,954	24,397 Direct	-1.05%	Disposed	951.1% (price as of 2026-08-19)
Feb. 29, 2016	MPLX	F	122	$25.83	$3,151	11,003 Direct	-1.10%	Disposed	128.8% (price as of 2026-08-19)
Feb. 29, 2016	MPC	F	219	$34.54	$7,564	24,657 Direct	-0.88%	Disposed	948.1% (price as of 2026-08-19)
Feb. 1, 2016	MPLX	A	234	—	—	11,125 Direct	+2.15%	Acquired	(price as of 2026-08-19)
Feb. 1, 2016	MPC	A	984	—	—	24,876 Direct	+4.12%	Acquired	(price as of 2026-08-19)
Aug. 28, 2015	MPLX	P	1,000	$50.26	$50,260	10,891 Direct	+10.11%	Acquired	17.6% (price as of 2026-08-19)
Aug. 20, 2015	MPC	P	1,000	$54.11	$54,110	23,892 Direct	+4.37%	Acquired	569.0% (price as of 2026-08-19)
Aug. 20, 2015	MPLX	P	1,000	$51.34	$51,340	9,891 Direct	+11.25%	Acquired	15.1% (price as of 2026-08-19)
March 2, 2015	MPC	A	21,334	—	—	21,334 Direct	—	Acquired	(price as of 2026-08-19)
March 2, 2015	MPC	A	2,830	—	—	11,446 Direct	+32.85%	Acquired	(price as of 2026-08-19)
March 2, 2015	MPC	F	130	$102.68	$13,348	8,616 Direct	-1.49%	Disposed	605.1% (price as of 2026-08-19)
March 2, 2015	MPC	F	256	$102.68	$26,286	8,746 Direct	-2.84%	Disposed	605.1% (price as of 2026-08-19)
March 2, 2015	MPLX	A	2,190	—	—	8,891 Direct	+32.68%	Acquired	(price as of 2026-08-19)
March 2, 2015	MPLX	F	99	$82.17	$8,135	6,701 Direct	-1.46%	Disposed	-28.1% (price as of 2026-08-19)
Feb. 27, 2015	MPC	F	110	$106.58	$11,724	9,002 Direct	-1.21%	Disposed	579.3% (price as of 2026-08-19)
Feb. 27, 2015	MPLX	F	121	$81.14	$9,818	6,800 Direct	-1.75%	Disposed	-27.2% (price as of 2026-08-19)
Jan. 30, 2015	MPC	A	518	—	—	9,112 Direct	+6.03%	Acquired	(price as of 2026-08-19)
Aug. 26, 2014	MPC	F	381	$90.03	$34,301	8,594 Direct	-4.25%	Disposed	704.2% (price as of 2026-08-19)
March 3, 2014	MPLX	A	924	—	—	6,921 Direct	+15.41%	Acquired	(price as of 2026-08-19)
March 3, 2014	MPC	A	8,203	—	—	8,203 Direct	—	Acquired	(price as of 2026-08-19)
March 3, 2014	MPC	A	1,224	—	—	8,975 Direct	+15.79%	Acquired	(price as of 2026-08-19)
March 3, 2014	MPC	F	256	$84.18	$21,550	7,751 Direct	-3.20%	Disposed	760.1% (price as of 2026-08-19)
Feb. 27, 2014	MPC	F	128	$85.68	$10,967	8,007 Direct	-1.57%	Disposed	745.0% (price as of 2026-08-19)
Feb. 27, 2014	MPLX	F	141	$49.36	$6,960	5,997 Direct	-2.30%	Disposed	19.8% (price as of 2026-08-19)
Aug. 26, 2013	MPC	F	381	$75.41	$28,731	8,135 Direct	-4.47%	Disposed	860.1% (price as of 2026-08-19)
March 1, 2013	MPC	F	256	$83.68	$21,422	8,516 Direct	-2.92%	Disposed	765.2% (price as of 2026-08-19)
Feb. 27, 2013	MPLX	A	1,138	—	—	6,138 Direct	+22.76%	Acquired	(price as of 2026-08-19)
Feb. 27, 2013	MPC	A	6,536	—	—	6,536 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 27, 2013	MPC	A	1,028	—	—	8,772 Direct	+13.27%	Acquired	(price as of 2026-08-19)
Oct. 31, 2012	MPLX	P	5,000	$22.00	$110,000	5,000 Direct	—	Acquired	168.7% (price as of 2026-08-19)
Aug. 27, 2012	MPC	F	424	$49.73	$21,086	7,745 Direct	-5.19%	Disposed	1355.9% (price as of 2026-08-19)
Feb. 29, 2012	MPC	A	14,006	—	—	14,006 Direct	—	Acquired	(price as of 2026-08-19)
Feb. 29, 2012	MPC	A	2,407	—	—	8,142 Direct	+41.97%	Acquired	(price as of 2026-08-19)
Nov. 17, 2011	MPC	P	1,000	$32.26	$32,260	5,735 Direct	+21.12%	Acquired	2144.3% (price as of 2026-08-19)
Aug. 26, 2011	MPC	A	9,550	—	—	9,550 Direct	—	Acquired	(price as of 2026-08-19)
Aug. 26, 2011	MPC	A	3,585	—	—	4,735 Direct	+311.74%	Acquired	(price as of 2026-08-19)
Aug. 9, 2011	MPC	P	1,000	$32.83	$32,830	1,150 Direct	+666.67%	Acquired	2105.3% (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
March 2, 2020	MPC	Employee Stock Option (right to buy)	Common Stock (91,198)	$47.73	March 1, 2030	91,198	Acquired
March 1, 2019	MPC	Stock Option (right to buy)	Common Stock (53,557)	$62.68	March 1, 2029	53,557	Acquired
March 1, 2018	MPC	Stock Option (right to buy)	Common Stock (38,688)	$64.79	March 1, 2028	38,688	Acquired
March 1, 2017	MPC	Stock Option (right to buy)	Common Stock (56,180)	$50.99	March 1, 2027	56,180	Acquired
March 1, 2016	MPC	Stock Option (right to buy)	Common Stock (64,193)	$34.63	March 1, 2026	64,193	Acquired
March 2, 2015	MPC	Stock Option (right to buy)	Common Stock (21,334)	$101.78	March 1, 2025	21,334	Acquired
March 3, 2014	MPC	Stock Option (right to buy)	Common Stock (8,203)	$83.37	March 1, 2024	8,203	Acquired
Feb. 27, 2013	MPC	Stock Option (right to buy)	Common Stock (6,536)	$82.74	Feb. 27, 2023	6,536	Acquired
Feb. 29, 2012	MPC	Stock Option (right to buy)	Common Stock (14,006)	$41.55	March 1, 2022	14,006	Acquired
Aug. 26, 2011	MPC	Stock Option (right to buy)	Common Stock (9,550)	$34.87	Aug. 26, 2021	9,550	Acquired

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
Aug. 3, 2011	MPC	Common Stock	150	Direct

Compensation (DEF 14A)

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

MPC

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2020	$868,750	—	$2,169,261	$891,004	$1,285,667	$382,220	$242,547	$5,839,449
2019	$837,500	—	$1,916,038	$768,007	$2,233,332	$272,229	$508,922	$6,536,028
2018	$775,000	—	$1,655,410	$672,011	$1,150,000	$130,153	$135,124	$4,517,698

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