There is a long list of 144 institutional holders of CERS 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 CERS by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-CERS table below, the initial column indicates the name of each top institutional holder of CERS, with a link to that fund's top holdings. The next columns indicate the amount of CERS stock held by each of the institutional holders of CERS, followed by the CERS 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
Baker BROS. Advisors LP	19,477,339	$42,071	12/31/2023
CERS	19,477,339	$42,071	12/31/2023
ARK Investment Management LLC	21,545,196	$40,720	03/31/2024
CERS	21,545,196	$40,720	03/31/2024
BlackRock Inc.	13,728,396	$29,653	12/31/2023
CERS	13,728,396	$29,653	12/31/2023
Vanguard Group Inc.	9,870,671	$21,321	12/31/2023
CERS	9,870,671	$21,321	12/31/2023
Primecap Management Co. CA	8,613,000	$18,604	12/31/2023
CERS	8,613,000	$18,604	12/31/2023
Nikko Asset Management Americas Inc.	7,568,071	$16,347	12/31/2023
CERS	7,568,071	$16,347	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	7,750,700	$14,649	03/31/2024
CERS	7,750,700	$14,649	03/31/2024
Senvest Management LLC	6,583,826	$14,221	12/31/2023
CERS	6,583,826	$14,221	12/31/2023
Wasatch Advisors Inc.	6,284,104	$11,877	03/31/2024
CERS	6,284,104	$11,877	03/31/2024
Geode Capital Management LLC	4,012,720	$8,668	12/31/2023
CERS	4,012,720	$8,668	12/31/2023
State Street Corp	3,517,032	$7,597	12/31/2023
CERS	3,517,032	$7,597	12/31/2023
D. E. Shaw & Co. Inc.	2,867,711	$6,194	12/31/2023
CERS	2,867,711	$6,194	12/31/2023
Millennium Management LLC	2,700,215	$5,832	12/31/2023
CERS	2,700,215	$5,832	12/31/2023
Voya Investment Management LLC	2,592,621	$5,600	12/31/2023
CERS	2,592,621	$5,600	12/31/2023
Silvercrest Asset Management Group LLC	2,581,932	$5,577	12/31/2023
CERS	2,581,932	$5,577	12/31/2023
Citadel Advisors LLC		$5,449	12/31/2023
CERS	2,544,079	$5,495	12/31/2023
Put	31,000	$67	12/31/2023
Call	9,600	$21	12/31/2023
Charles Schwab Investment Management Inc.	1,656,656	$3,578	12/31/2023
CERS	1,656,656	$3,578	12/31/2023
Northern Trust Corp	1,636,662	$3,535	12/31/2023
CERS	1,636,662	$3,535	12/31/2023
Barclays PLC	1,588,070	$3,430	12/31/2023
CERS	1,588,070	$3,430	12/31/2023
Silverarc Capital Management LLC	1,499,851	$3,240	12/31/2023
CERS	1,499,851	$3,240	12/31/2023
Morgan Stanley	1,400,316	$3,025	12/31/2023
CERS	1,400,316	$3,025	12/31/2023
GSA Capital Partners LLP	1,003,850	$2,168	12/31/2023
CERS	1,003,850	$2,168	12/31/2023
Assenagon Asset Management S.A.	1,107,740	$2,094	03/31/2024
CERS	1,107,740	$2,094	03/31/2024
Goldman Sachs Group Inc.	703,983	$1,521	12/31/2023
CERS	703,983	$1,521	12/31/2023
Susquehanna International Group LLP		$1,149	12/31/2023
CERS	523,361	$1,130	12/31/2023
Call	24,900	$54	12/31/2023
Put	16,300	$35	12/31/2023
Jane Street Group LLC	502,128	$1,085	12/31/2023
CERS	502,128	$1,085	12/31/2023
Bank of New York Mellon Corp	557,373	$1,053	03/31/2024
CERS	557,373	$1,053	03/31/2024
Nuveen Asset Management LLC	444,639	$960	12/31/2023
CERS	444,639	$960	12/31/2023
UBS Group AG	406,484	$878	12/31/2023
CERS	406,484	$878	12/31/2023
FMR LLC	380,664	$822	12/31/2023
CERS	380,664	$822	12/31/2023
Man Group plc	342,921	$741	12/31/2023
CERS	342,921	$741	12/31/2023
Two Sigma Investments LP	331,790	$717	12/31/2023
CERS	331,790	$717	12/31/2023
Raymond James & Associates	315,520	$596	03/31/2024
CERS	315,520	$596	03/31/2024
Renaissance Technologies LLC	274,100	$592	12/31/2023
CERS	274,100	$592	12/31/2023
Engineers Gate Manager LP	268,662	$580	12/31/2023
CERS	268,662	$580	12/31/2023
Formula Growth Ltd.	242,290	$523	12/31/2023
CERS	242,290	$523	12/31/2023
Bouvel Investment Partners LLC	269,849	$510	03/31/2024
CERS	269,849	$510	03/31/2024
Rhumbline Advisers	233,853	$505	12/31/2023
CERS	233,853	$505	12/31/2023
Stifel Financial Corp	231,472	$500	12/31/2023
CERS	231,472	$500	12/31/2023
Kennedy Capital Management Inc.	226,712	$490	12/31/2023
CERS	226,712	$490	12/31/2023
Alliancebernstein L.P.	202,074	$436	12/31/2023
CERS	202,074	$436	12/31/2023
BNP Paribas Arbitrage SA	218,647	$413	03/31/2024
CERS	218,647	$413	03/31/2024
SG Americas Securities LLC	188,702	$408	12/31/2023
CERS	188,702	$408	12/31/2023
Price T Rowe Associates Inc. MD	183,891	$398	12/31/2023
CERS	183,891	$398	12/31/2023
JPMorgan Chase & Co.	174,264	$376	12/31/2023
CERS	174,264	$376	12/31/2023
Stephens Inc. AR	161,829	$350	12/31/2023
CERS	161,829	$350	12/31/2023
Sepio Capital LP	147,500	$319	12/31/2023
CERS	147,500	$319	12/31/2023
Capital Impact Advisors LLC	129,404	$280	12/31/2023
CERS	129,404	$280	12/31/2023
Algert Global LLC	121,970	$263	12/31/2023
CERS	121,970	$263	12/31/2023
Sierra Summit Advisors LLC	117,379	$254	12/31/2023
CERS	117,379	$254	12/31/2023