There is a long list of 404 institutional holders of CHX within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of CHX by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-CHX table below, the initial column indicates the name of each top institutional holder of CHX, with a link to that fund's top holdings. The next columns indicate the amount of CHX stock held by each of the institutional holders of CHX, followed by the CHX position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	23,767,417	$694,246	12/31/2023
CHX	23,767,417	$694,246	12/31/2023
Vanguard Group Inc.	20,033,091	$585,167	12/31/2023
CHX	20,033,091	$585,167	12/31/2023
Alliancebernstein L.P.	8,394,776	$245,211	12/31/2023
CHX	8,394,776	$245,211	12/31/2023
T. Rowe Price Investment Management Inc.	7,692,568	$224,700	12/31/2023
CHX	7,692,568	$224,700	12/31/2023
State Street Corp	7,260,347	$212,075	12/31/2023
CHX	7,260,347	$212,075	12/31/2023
FMR LLC	6,964,381	$203,430	12/31/2023
CHX	6,964,381	$203,430	12/31/2023
Brown Advisory Inc.	6,364,676	$185,912	12/31/2023
CHX	6,364,676	$185,912	12/31/2023
American Century Companies Inc.	6,257,591	$182,784	12/31/2023
CHX	6,257,591	$182,784	12/31/2023
Clearbridge Investments LLC	4,943,831	$144,409	12/31/2023
CHX	4,943,831	$144,409	12/31/2023
Congress Asset Management Co. MA	3,991,117	$143,241	03/31/2024
CHX	3,991,117	$143,241	03/31/2024
Geode Capital Management LLC	4,366,295	$127,554	12/31/2023
CHX	4,366,295	$127,554	12/31/2023
Invesco Ltd.	3,771,435	$110,164	12/31/2023
CHX	3,771,435	$110,164	12/31/2023
Bessemer Group Inc.	3,743,325	$109,343	12/31/2023
CHX	3,743,325	$109,343	12/31/2023
Dimensional Fund Advisors LP	3,433,718	$100,305	12/31/2023
CHX	3,433,718	$100,305	12/31/2023
Van ECK Associates Corp	3,429,572	$100,178	12/31/2023
CHX	3,429,572	$100,178	12/31/2023
Janus Henderson Group PLC	3,287,423	$96,026	12/31/2023
CHX	3,287,423	$96,026	12/31/2023
Bank of New York Mellon Corp	2,932,031	$85,645	12/31/2023
CHX	2,932,031	$85,645	12/31/2023
Northern Trust Corp	2,873,633	$83,939	12/31/2023
CHX	2,873,633	$83,939	12/31/2023
Bank of America Corp DE		$78,890	12/31/2023
CHX	1,890,393	$55,218	12/31/2023
Call	810,400	$23,672	12/31/2023
Price T Rowe Associates Inc. MD	2,616,619	$76,433	12/31/2023
CHX	2,616,619	$76,433	12/31/2023
Gates Capital Management Inc.	2,561,043	$74,808	12/31/2023
CHX	2,561,043	$74,808	12/31/2023
Charles Schwab Investment Management Inc.	2,466,830	$72,056	12/31/2023
CHX	2,466,830	$72,056	12/31/2023
Hawk Ridge Capital Management LP	2,314,002	$67,592	12/31/2023
CHX	2,314,002	$67,592	12/31/2023
Principal Financial Group Inc.	2,165,792	$63,263	12/31/2023
CHX	2,165,792	$63,263	12/31/2023
Capital Research Global Investors	2,025,494	$59,165	12/31/2023
CHX	2,025,494	$59,165	12/31/2023
GW&K Investment Management LLC	2,020,151	$59,008	12/31/2023
CHX	2,020,151	$59,008	12/31/2023
Massachusetts Financial Services Co. MA	1,926,176	$56,264	12/31/2023
CHX	1,926,176	$56,264	12/31/2023
Loomis Sayles & Co. L P	1,708,020	$49,891	12/31/2023
CHX	1,708,020	$49,891	12/31/2023
Fred Alger Management LLC	1,653,957	$48,312	12/31/2023
CHX	1,653,957	$48,312	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	1,598,635	$46,696	12/31/2023
CHX	1,598,635	$46,696	12/31/2023
Ameriprise Financial Inc.	1,547,867	$45,217	12/31/2023
CHX	1,547,867	$45,217	12/31/2023
Nuveen Asset Management LLC	1,477,840	$43,168	12/31/2023
CHX	1,477,840	$43,168	12/31/2023
Cramer Rosenthal Mcglynn LLC	1,458,811	$42,612	12/31/2023
CHX	1,458,811	$42,612	12/31/2023
Chevy Chase Trust Holdings Inc.	1,429,265	$41,749	12/31/2023
CHX	1,429,265	$41,749	12/31/2023
Fiera Capital Corp	1,331,283	$38,887	12/31/2023
CHX	1,331,283	$38,887	12/31/2023
Morgan Stanley	1,307,643	$38,196	12/31/2023
CHX	1,307,643	$38,196	12/31/2023
JPMorgan Chase & Co.	1,261,145	$36,838	12/31/2023
CHX	1,261,145	$36,838	12/31/2023
Paradice Investment Management LLC	1,178,766	$34,432	12/31/2023
CHX	1,178,766	$34,432	12/31/2023
Boston Partners	1,173,154	$33,756	12/31/2023
CHX	1,173,154	$33,756	12/31/2023
FIL Ltd	1,077,763	$31,481	12/31/2023
CHX	1,077,763	$31,481	12/31/2023
Envestnet Asset Management Inc.	979,517	$28,612	12/31/2023
CHX	979,517	$28,612	12/31/2023
William Blair Investment Management LLC	963,020	$28,130	12/31/2023
CHX	963,020	$28,130	12/31/2023
Goldman Sachs Group Inc.	939,373	$27,439	12/31/2023
CHX	939,373	$27,439	12/31/2023
Jupiter Asset Management Ltd.	929,301	$27,145	12/31/2023
CHX	929,301	$27,145	12/31/2023
Leeward Investments LLC MA	892,731	$26,077	12/31/2023
CHX	892,731	$26,077	12/31/2023
Westfield Capital Management Co. LP	891,381	$26,037	12/31/2023
CHX	891,381	$26,037	12/31/2023
Earnest Partners LLC	876,652	$25,607	12/31/2023
CHX	876,652	$25,607	12/31/2023
Standard Life Aberdeen plc	773,818	$22,603	12/31/2023
CHX	773,818	$22,603	12/31/2023
Rhumbline Advisers	724,926	$21,175	12/31/2023
CHX	724,926	$21,175	12/31/2023
Mutual of America Capital Management LLC	714,261	$20,864	12/31/2023
CHX	714,261	$20,864	12/31/2023