On this page, we present all of the funds holding MRC from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding MRC, with a link to that fund's top holdings. The next columns indicate the amount of MRC stock held by each of the funds holding MRC, followed by the MRC position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 178 funds holding MRC within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by Vanguard Group Inc.. For more details on the positions held by Vanguard Group Inc. (or by any of the other funds holding MRC), click the fund name in the "Holder" column of the funds-holding-MRC table below.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	9,003,975	$99,134	12/31/2023
MRC	9,003,975	$99,134	12/31/2023
Pzena Investment Management LLC	7,001,859	$77,090	12/31/2023
MRC	7,001,859	$77,090	12/31/2023
BlackRock Inc.	6,560,977	$72,236	12/31/2023
MRC	6,560,977	$72,236	12/31/2023
Frontier Capital Management Co. LLC	6,005,201	$66,117	12/31/2023
MRC	6,005,201	$66,117	12/31/2023
Fuller & Thaler Asset Management Inc.	4,002,499	$44,068	12/31/2023
MRC	4,002,499	$44,068	12/31/2023
Engine Capital Management LP	3,866,886	$42,574	12/31/2023
MRC	3,866,886	$42,574	12/31/2023
Dimensional Fund Advisors LP	3,327,337	$36,635	12/31/2023
MRC	3,327,337	$36,635	12/31/2023
Wellington Management Group LLP	3,002,126	$33,053	12/31/2023
MRC	3,002,126	$33,053	12/31/2023
American Century Companies Inc.	2,251,116	$24,785	12/31/2023
MRC	2,251,116	$24,785	12/31/2023
State Street Corp	1,869,029	$20,578	12/31/2023
MRC	1,869,029	$20,578	12/31/2023
Geode Capital Management LLC	1,782,928	$19,632	12/31/2023
MRC	1,782,928	$19,632	12/31/2023
Kennedy Capital Management Inc.	1,530,794	$16,854	12/31/2023
MRC	1,530,794	$16,854	12/31/2023
Harvey Partners LLC	1,500,000	$16,515	12/31/2023
MRC	1,500,000	$16,515	12/31/2023
Charles Schwab Investment Management Inc.	1,431,512	$15,761	12/31/2023
MRC	1,431,512	$15,761	12/31/2023
Philosophy Capital Management LLC	1,377,777	$15,169	12/31/2023
MRC	1,377,777	$15,169	12/31/2023
Morgan Stanley	1,251,079	$13,774	12/31/2023
MRC	1,251,079	$13,774	12/31/2023
Mirae Asset Global Investments Co. Ltd.	1,235,674	$13,605	12/31/2023
MRC	1,235,674	$13,605	12/31/2023
Royce & Associates LP	1,078,511	$11,874	12/31/2023
MRC	1,078,511	$11,874	12/31/2023
Renaissance Technologies LLC	947,600	$10,433	12/31/2023
MRC	947,600	$10,433	12/31/2023
Assenagon Asset Management S.A.	795,818	$10,003	03/31/2024
MRC	795,818	$10,003	03/31/2024
Loomis Sayles & Co. L P	876,352	$9,649	12/31/2023
MRC	876,352	$9,649	12/31/2023
Nuveen Asset Management LLC	860,971	$9,479	12/31/2023
MRC	860,971	$9,479	12/31/2023
Northern Trust Corp	827,813	$9,114	12/31/2023
MRC	827,813	$9,114	12/31/2023
Pekin Hardy Strauss Inc.	747,447	$8,229	12/31/2023
MRC	747,447	$8,229	12/31/2023
Lord Abbett & CO. LLC	740,332	$8,151	12/31/2023
MRC	740,332	$8,151	12/31/2023
South Dakota Investment Council	729,599	$8,033	12/31/2023
MRC	729,599	$8,033	12/31/2023
Balyasny Asset Management LLC	683,452	$7,525	12/31/2023
MRC	683,452	$7,525	12/31/2023
Goldman Sachs Group Inc.	669,085	$7,367	12/31/2023
MRC	669,085	$7,367	12/31/2023
Two Sigma Advisers LP	628,700	$6,922	12/31/2023
MRC	628,700	$6,922	12/31/2023
Wintrust Investments LLC	605,510	$6,667	12/31/2023
MRC	605,510	$6,667	12/31/2023
BOKF NA	520,301	$5,729	12/31/2023
MRC	520,301	$5,729	12/31/2023
Bank of America Corp DE	492,683	$5,424	12/31/2023
MRC	492,683	$5,424	12/31/2023
D. E. Shaw & Co. Inc.	482,655	$5,314	12/31/2023
MRC	482,655	$5,314	12/31/2023
Two Sigma Investments LP	481,676	$5,303	12/31/2023
MRC	481,676	$5,303	12/31/2023
Bank of New York Mellon Corp	378,625	$4,759	03/31/2024
MRC	378,625	$4,759	03/31/2024
Appian Way Asset Management LP	430,968	$4,745	12/31/2023
MRC	430,968	$4,745	12/31/2023
Invesco Ltd.	366,573	$4,036	12/31/2023
MRC	366,573	$4,036	12/31/2023
Sourcerock Group LLC	363,936	$4,007	12/31/2023
MRC	363,936	$4,007	12/31/2023
Driehaus Capital Management LLC	362,762	$3,994	12/31/2023
MRC	362,762	$3,994	12/31/2023
Alliancebernstein L.P.	348,750	$3,840	12/31/2023
MRC	348,750	$3,840	12/31/2023
AQR Capital Management LLC	336,028	$3,700	12/31/2023
MRC	336,028	$3,700	12/31/2023
Deutsche Bank AG	275,523	$3,034	12/31/2023
MRC	275,523	$3,034	12/31/2023
Hotchkis & Wiley Capital Management LLC	263,590	$2,902	12/31/2023
MRC	263,590	$2,902	12/31/2023
Essex Investment Management Co. LLC	259,526	$2,857	12/31/2023
MRC	259,526	$2,857	12/31/2023
Maven Securities LTD	250,000	$2,752	12/31/2023
MRC	250,000	$2,752	12/31/2023
Brandywine Global Investment Management LLC	229,621	$2,528	12/31/2023
MRC	229,621	$2,528	12/31/2023
Citadel Advisors LLC		$2,217	12/31/2023
MRC	222,337	$2,448	12/31/2023
Put	21,100	$232	12/31/2023
Call	100	$1	12/31/2023
Rhumbline Advisers	188,850	$2,079	12/31/2023
MRC	188,850	$2,079	12/31/2023
Millennium Management LLC	187,420	$2,063	12/31/2023
MRC	187,420	$2,063	12/31/2023
Beryl Capital Management LLC	170,865	$1,881	12/31/2023
MRC	170,865	$1,881	12/31/2023
CastleKnight Management LP	170,600	$1,878	12/31/2023
MRC	170,600	$1,878	12/31/2023
Swiss National Bank	165,549	$1,823	12/31/2023
MRC	165,549	$1,823	12/31/2023
Algert Global LLC	155,918	$1,717	12/31/2023
MRC	155,918	$1,717	12/31/2023
Barclays PLC	151,733	$1,671	12/31/2023
MRC	151,733	$1,671	12/31/2023
HighVista Strategies LLC	151,800	$1,671	12/31/2023
MRC	151,800	$1,671	12/31/2023
Russell Investments Group Ltd.	143,637	$1,581	12/31/2023
MRC	143,637	$1,581	12/31/2023
Cubist Systematic Strategies LLC	135,046	$1,487	12/31/2023
MRC	135,046	$1,487	12/31/2023
Susquehanna International Group LLP		$1,456	12/31/2023
MRC	178,480	$1,965	12/31/2023
Put	46,200	$509	12/31/2023
Credit Suisse AG	129,057	$1,421	12/31/2023
MRC	129,057	$1,421	12/31/2023
UBS Asset Management Americas Inc.	125,454	$1,381	12/31/2023
MRC	125,454	$1,381	12/31/2023
Legato Capital Management LLC	104,382	$1,312	03/31/2024
MRC	104,382	$1,312	03/31/2024
JPMorgan Chase & Co.	116,370	$1,281	12/31/2023
MRC	116,370	$1,281	12/31/2023
UBS Group AG	108,812	$1,198	12/31/2023
MRC	108,812	$1,198	12/31/2023
Susquehanna Portfolio Strategies LLC	105,472	$1,161	12/31/2023
MRC	105,472	$1,161	12/31/2023
Arrowstreet Capital Limited Partnership	104,558	$1,151	12/31/2023
MRC	104,558	$1,151	12/31/2023
Schonfeld Strategic Advisors LLC	103,000	$1,134	12/31/2023
MRC	103,000	$1,134	12/31/2023
Federated Hermes Inc.	102,020	$1,123	12/31/2023
MRC	102,020	$1,123	12/31/2023
Engineers Gate Manager LP	99,709	$1,098	12/31/2023
MRC	99,709	$1,098	12/31/2023
First Hawaiian Bank	86,393	$1,086	03/31/2024
MRC	86,393	$1,086	03/31/2024
State of Wisconsin Investment Board	98,068	$1,080	12/31/2023
MRC	98,068	$1,080	12/31/2023
PDT Partners LLC	95,062	$1,047	12/31/2023
MRC	95,062	$1,047	12/31/2023
Norges Bank	94,000	$1,035	12/31/2023
MRC	94,000	$1,035	12/31/2023
Dynamic Technology Lab Private Ltd	93,607	$1,031	12/31/2023
MRC	93,607	$1,031	12/31/2023
California State Teachers Retirement System	88,668	$976	12/31/2023
MRC	88,668	$976	12/31/2023
Legal & General Group Plc	84,140	$926	12/31/2023
MRC	84,140	$926	12/31/2023
SummerHaven Investment Management LLC	71,089	$894	03/31/2024
MRC	71,089	$894	03/31/2024
Bank of Montreal Can	77,269	$859	12/31/2023
MRC	77,269	$859	12/31/2023
Bridgeway Capital Management Inc.	77,752	$856	12/31/2023
MRC	77,752	$856	12/31/2023
Empowered Funds LLC	77,752	$856	12/31/2023
MRC	77,752	$856	12/31/2023
BNP Paribas Arbitrage SA	75,434	$831	12/31/2023
MRC	75,434	$831	12/31/2023
Great West Life Assurance Co. Can	73,478	$804	12/31/2023
MRC	73,478	$804	12/31/2023
Dark Forest Capital Management LP	70,744	$779	12/31/2023
MRC	70,744	$779	12/31/2023
Price T Rowe Associates Inc. MD	63,452	$699	12/31/2023
MRC	63,452	$699	12/31/2023
Strs Ohio	62,800	$691	12/31/2023
MRC	62,800	$691	12/31/2023
Bailard Inc.	60,410	$665	12/31/2023
MRC	60,410	$665	12/31/2023
Raymond James & Associates	51,639	$649	03/31/2024
MRC	51,639	$649	03/31/2024
Franklin Resources Inc.	55,553	$612	12/31/2023
MRC	55,553	$612	12/31/2023
Qube Research & Technologies Ltd	50,122	$552	12/31/2023
MRC	50,122	$552	12/31/2023
Venator Management LLC	50,000	$550	12/31/2023
MRC	50,000	$550	12/31/2023
Jump Financial LLC	47,800	$526	12/31/2023
MRC	47,800	$526	12/31/2023
Aigen Investment Management LP	46,876	$516	12/31/2023
MRC	46,876	$516	12/31/2023
Cornercap Investment Counsel Inc.	44,228	$487	12/31/2023
MRC	44,228	$487	12/31/2023
MetLife Investment Management LLC	44,004	$484	12/31/2023
MRC	44,004	$484	12/31/2023
FMR LLC	43,351	$477	12/31/2023
MRC	43,351	$477	12/31/2023
American International Group Inc.	41,729	$459	12/31/2023
MRC	41,729	$459	12/31/2023
Y Intercept Hong Kong Ltd	41,491	$457	12/31/2023
MRC	41,491	$457	12/31/2023
Ameriprise Financial Inc.	39,846	$439	12/31/2023
MRC	39,846	$439	12/31/2023
Janus Henderson Group PLC	36,087	$397	12/31/2023
MRC	36,087	$397	12/31/2023
Voya Investment Management LLC	34,338	$378	12/31/2023
MRC	34,338	$378	12/31/2023
State Board of Administration of Florida Retirement System	34,072	$375	12/31/2023
MRC	34,072	$375	12/31/2023
RBF Capital LLC	33,926	$374	12/31/2023
MRC	33,926	$374	12/31/2023
Jacobs Levy Equity Management Inc.	32,784	$361	12/31/2023
MRC	32,784	$361	12/31/2023
The Manufacturers Life Insurance Company	32,730	$360	12/31/2023
MRC	32,730	$360	12/31/2023
Grantham Mayo Van Otterloo & Co. LLC	32,294	$356	12/31/2023
MRC	32,294	$356	12/31/2023
American Trust	30,468	$335	12/31/2023
MRC	30,468	$335	12/31/2023
Affinity Investment Advisors LLC	29,755	$328	12/31/2023
MRC	29,755	$328	12/31/2023
Comerica Bank	29,183	$321	12/31/2023
MRC	29,183	$321	12/31/2023
Trexquant Investment LP	28,934	$319	12/31/2023
MRC	28,934	$319	12/31/2023
Boothbay Fund Management LLC	28,601	$315	12/31/2023
MRC	28,601	$315	12/31/2023
Fox Run Management L.L.C.	27,589	$304	12/31/2023
MRC	27,589	$304	12/31/2023
Ophir Asset Management Pty Ltd	27,599	$304	12/31/2023
MRC	27,599	$304	12/31/2023
Shell Asset Management Co.	27,244	$300	12/31/2023
MRC	27,244	$300	12/31/2023
Wells Fargo & Company MN	26,415	$291	12/31/2023
MRC	26,415	$291	12/31/2023
New York State Common Retirement Fund	26,428	$291	12/31/2023
MRC	26,428	$291	12/31/2023
Zurcher Kantonalbank Zurich Cantonalbank	22,356	$281	03/31/2024
MRC	22,356	$281	03/31/2024
Royal Bank of Canada	25,446	$280	12/31/2023
MRC	25,446	$280	12/31/2023
AXA S.A.	24,700	$272	12/31/2023
MRC	24,700	$272	12/31/2023
Arizona State Retirement System	23,485	$259	12/31/2023
MRC	23,485	$259	12/31/2023
Connor Clark & Lunn Investment Management Ltd.	22,425	$247	12/31/2023
MRC	22,425	$247	12/31/2023
Stifel Financial Corp	21,750	$239	12/31/2023
MRC	21,750	$239	12/31/2023
Tower Research Capital LLC TRC	20,978	$231	12/31/2023
MRC	20,978	$231	12/31/2023
Jane Street Group LLC	20,806	$229	12/31/2023
MRC	20,806	$229	12/31/2023
HB Wealth Management LLC	20,164	$222	12/31/2023
MRC	20,164	$222	12/31/2023
Hsbc Holdings PLC	19,455	$215	12/31/2023
MRC	19,455	$215	12/31/2023
Blair William & Co. IL	19,500	$215	12/31/2023
MRC	19,500	$215	12/31/2023
Citigroup Inc.	18,769	$207	12/31/2023
MRC	18,769	$207	12/31/2023
Quantbot Technologies LP	16,391	$180	12/31/2023
MRC	16,391	$180	12/31/2023
Teacher Retirement System of Texas	16,126	$178	12/31/2023
MRC	16,126	$178	12/31/2023
Public Employees Retirement Association of Colorado	15,780	$174	12/31/2023
MRC	15,780	$174	12/31/2023
XTX Topco Ltd	15,323	$169	12/31/2023
MRC	15,323	$169	12/31/2023
Lazard Asset Management LLC	14,274	$157	12/31/2023
MRC	14,274	$157	12/31/2023
ProShare Advisors LLC	13,897	$153	12/31/2023
MRC	13,897	$153	12/31/2023
SG Americas Securities LLC	13,846	$152	12/31/2023
MRC	13,846	$152	12/31/2023
Sei Investments Co.	13,754	$151	12/31/2023
MRC	13,754	$151	12/31/2023
EntryPoint Capital LLC	11,609	$128	12/31/2023
MRC	11,609	$128	12/31/2023
Graham Capital Management L.P.	11,183	$123	12/31/2023
MRC	11,183	$123	12/31/2023
Victory Capital Management Inc.	11,074	$122	12/31/2023
MRC	11,074	$122	12/31/2023
Sequoia Financial Advisors LLC	11,041	$122	12/31/2023
MRC	11,041	$122	12/31/2023
Bridgefront Capital LLC	11,112	$122	12/31/2023
MRC	11,112	$122	12/31/2023
Mackenzie Financial Corp	10,890	$120	12/31/2023
MRC	10,890	$120	12/31/2023
Principal Financial Group Inc.	10,348	$114	12/31/2023
MRC	10,348	$114	12/31/2023
Brevan Howard Capital Management LP	10,099	$111	12/31/2023
MRC	10,099	$111	12/31/2023
New York State Teachers Retirement System	7,514	$94	03/31/2024
MRC	7,514	$94	03/31/2024
Ameritas Investment Partners Inc.	8,341	$92	12/31/2023
MRC	8,341	$92	12/31/2023
Metropolitan Life Insurance Co NY	4,865	$54	12/31/2023
MRC	4,865	$54	12/31/2023
Point72 Middle East FZE	3,795	$42	12/31/2023
MRC	3,795	$42	12/31/2023
State of Wyoming	3,720	$41	12/31/2023
MRC	3,720	$41	12/31/2023
Aquatic Capital Management LLC	3,500	$39	12/31/2023
MRC	3,500	$39	12/31/2023
Amalgamated Bank	2,909	$37	03/31/2024
MRC	2,909	$37	03/31/2024
Public Employees Retirement System of Ohio	3,153	$35	12/31/2023
MRC	3,153	$35	12/31/2023
Gladius Capital Management LP	2,848	$31	12/31/2023
MRC	2,848	$31	12/31/2023
Quadrant Capital Group LLC	2,745	$30	12/31/2023
MRC	2,745	$30	12/31/2023
Venturi Wealth Management LLC	1,457	$18	03/31/2024
MRC	1,457	$18	03/31/2024
Nomura Asset Management Co. Ltd.	1,400	$15	12/31/2023
MRC	1,400	$15	12/31/2023
DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main	1,400	$15	12/31/2023
MRC	1,400	$15	12/31/2023
Investors Research Corp	1,200	$13	12/31/2023
MRC	1,200	$13	12/31/2023
Benjamin F. Edwards & Company Inc.	900	$10	12/31/2023
MRC	900	$10	12/31/2023
Point72 Hong Kong Ltd	800	$9	12/31/2023
MRC	800	$9	12/31/2023
Advisor Group Holdings Inc.	840	$9	12/31/2023
MRC	840	$9	12/31/2023
CWM LLC	633	$8	03/31/2024
MRC	633	$8	03/31/2024
NewSquare Capital LLC	655	$7	12/31/2023
MRC	655	$7	12/31/2023
Steward Partners Investment Advisory LLC	641	$7	12/31/2023
MRC	641	$7	12/31/2023
Ronald Blue Trust Inc.	508	$6	12/31/2023
MRC	508	$6	12/31/2023
US Bancorp DE	438	$5	12/31/2023
MRC	438	$5	12/31/2023
Advisory Services Network LLC	426	$5	12/31/2023
MRC	426	$5	12/31/2023
Lindbrook Capital LLC	161	$2	03/31/2024
MRC	161	$2	03/31/2024
GAMMA Investing LLC	189	$2	03/31/2024
MRC	189	$2	03/31/2024
Farther Finance Advisors LLC	157	$2	12/31/2023
MRC	157	$2	12/31/2023
Nisa Investment Advisors LLC	78	$1	12/31/2023
MRC	78	$1	12/31/2023
Signaturefd LLC	132	$1	12/31/2023
MRC	132	$1	12/31/2023
Covestor Ltd	115	$1	12/31/2023
MRC	115	$1	12/31/2023
Proequities Inc.		$0	12/31/2023
MRC	0	$0	12/31/2023
Put	0	$0	12/31/2023
Call	0	$0	12/31/2023
Toronto Dominion Bank	1	$0	12/31/2023
MRC	1	$0	12/31/2023
Parallel Advisors LLC	11	$0	12/31/2023
MRC	11	$0	12/31/2023
Smartleaf Asset Management LLC	1	$0	12/31/2023
MRC	1	$0	12/31/2023
Simplex Trading LLC		$-2	03/31/2024
Put	200	$2	03/31/2024
Group One Trading L.P.		$-66	12/31/2023
Put	7,500	$83	12/31/2023
Call	1,500	$17	12/31/2023
Parallax Volatility Advisers L.P.		$-225	12/31/2023
Put	24,900	$274	12/31/2023
MRC	4,472	$49	12/31/2023
PEAK6 Investments LLC	200	$-3,151	12/31/2023
Put	357,200	$3,933	12/31/2023
MRC	70,889	$780	12/31/2023
Call	200	$2	12/31/2023