Calamos Advisors LLC

SEC CIK: 0001316507
Latest filing: Jul 31, 2026

SEC filings (opens in a new tab)

MPC holding history

Marathon Petroleum Corp in every 13F filed by Calamos Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MPC overview All 13F holders of MPC Full Q2 2026 holdings

Shares (Q2 2026): 290,934
Value: $74.4M
% of portfolio: 0.3%
Quarters held: 22; Since Q1 2021

Holdings of MPC by Calamos Advisors LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	290,934	$74.4M	0.3%	−28,225−8.8%	Reduced	Holders
Q1 2026	319,159	$77.9M	0.3%	+5,955+1.9%	Added	Holders
Q4 2025	313,204	$50.9M	0.2%	−23,002−6.8%	Reduced	Holders
Q3 2025	336,206	$64.8M	0.3%	+974+0.3%	Added	Holders
Q2 2025	335,232	$55.7M	0.2%	+59,238+21.5%	Added	Holders
Q1 2025	275,994	$40.2M	0.2%	+2,208+0.8%	Added	Holders
Q4 2024	273,786	$38.2M	0.2%	+626+0.2%	Added	Holders
Q3 2024	273,160	$44.5M	0.2%	+32,423+13.5%	Added	Holders
Q2 2024	240,737	$41.8M	0.2%	−5,041−2.1%	Reduced	Holders
Q1 2024	245,778	$49.5M	0.2%	−127,166−34.1%	Reduced	Holders
Q4 2023	372,944	$55.3M	0.3%	−3,218−0.9%	Reduced	Holders
Q3 2023	376,162	$56.9M	0.3%	+533+0.1%	Added	Holders
Q2 2023	375,629	$43.8M	0.2%	−122,369−24.6%	Reduced	Holders
Q1 2023	497,998	$67.1M	0.3%	−65,977−11.7%	Reduced	Holders
Q4 2022	563,975	$65.6M	0.3%	−74,835−11.7%	Reduced	Holders
Q3 2022	638,810	$63.5M	0.3%	−58,335−8.4%	Reduced	Holders
Q2 2022	697,145	$57.3M	0.3%	+123,494+21.5%	Added	Holders
Q1 2022	573,651	$49.0M	0.2%	+62,987+12.3%	Added	Holders
Q4 2021	510,664	$32.7M	0.1%	−38,522−7.0%	Reduced	Holders
Q3 2021	549,186	$33.9M	0.2%	+39,540+7.8%	Added	Holders
Q2 2021	509,646	$30.8M	0.2%	+92,876+22.3%	Added	Holders
Q1 2021	416,770	$22.3M	0.1%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.