CERS · Cerus Corp · Shareholders & Ownership

$2.31 +0.09 (+4.05%)

Russell 2000 member Rebalance outlook locked

Market Cap

$465.52M

201.52M

Volume · Oct 20 1.48M Avg daily vol (3M) 2.16M

Every disclosed holder of CERS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns CERS

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	186	149,520,313	74.19%	Yes
Insiders (Forms 3, 4, 5)	13	11,915,066	5.91%	Yes
13D/G-only blocks	1	2,500,000	1.24%	Yes
Remaining	—	37,589,519	18.65%	Rest
Registered funds (N-PORT, not summed)	136	56,852,968	28.21%	No

Shares outstanding: 201,524,898, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of CERS

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	22,215,127	11.02%	+639,708	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	5,183,366	2.57%	+650,340	Jun 30, 2026	iShares Trust, not summed
1.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,868,339	0.93%	+365,482	Jun 30, 2026	iShares Trust, not summed
1.3	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	1,524,439	0.76%	-19,010	May 29, 2026	BlackRock Funds, not summed
1.4	iShares U.S. Small-Cap Equity Factor ETF Fund S000048624 · Registered fund · Jul 31, 2026 iShares Trust, not summed	965,854	0.48%	+67,943	Jul 31, 2026	iShares Trust, not summed
1.5	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	668,838	0.33%	+203,560	Jun 30, 2026	iShares Trust, not summed
2	ARK Investment Management LLC 13F CIK 1697748 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	17,932,099	8.90%	-1,229,049	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	ARK Investment Management LLC 13G CIK 1697748 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	17,932,099	8.90%	-1,275,505	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	ARK Innovation ETF Fund S000042977 · Registered fund · Jul 31, 2026 ARK ETF Trust, not summed	8,284,570	4.11%	-1,358,165	Jul 31, 2026	ARK ETF Trust, not summed
2.3	ARK Genomic Revolution ETF Fund S000042975 · Registered fund · Jul 31, 2026 ARK ETF Trust, not summed	7,223,126	3.58%	-227,408	Jul 31, 2026	ARK ETF Trust, not summed
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	8,563,424	4.25%	+431,646	Jun 30, 2026	carried, not yet filed for the newest quarter
4	BAKER BROS. ADVISORS LP 13F CIK 1263508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,395,431	3.17%	-3,612,914	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	BAKER BROS. ADVISORS LP 13G CIK 1263508 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	6,415,295	3.18%	-6,488,413	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
5	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	6,075,566	3.01%	+354,500	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
6	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	5,485,983	2.72%	+1,754,832	Jun 30, 2026	carried, not yet filed for the newest quarter
7	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,119,019	2.54%	+481,579	Jun 30, 2026	carried, not yet filed for the newest quarter
8	Greenman William Mariner Insider CIK 1377258 · Jun 30, 2026 Director, President and CEO, issuer-wide	5,053,036	2.51%	+54,543	Jun 30, 2026	Director, President and CEO, issuer-wide
9	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,753,962	2.36%	+539,060	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	State Street(R) SPDR(R) S&P(R) Health Care Equipment ETF Fund S000012330 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	325,903	0.16%	—	Jun 30, 2026	SPDR SERIES TRUST, not summed
9.2	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	67,009	0.03%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
9.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	5,308	0.00%	+1,216	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
9.4	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	1,786	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
10	Senvest Management, LLC 13F CIK 1328785 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,614,061	2.29%	+500,000	Jun 30, 2026	carried, not yet filed for the newest quarter
11	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	4,270,074	2.12%	+560,573	Jun 30, 2026	carried, not yet filed for the newest quarter
12	Sumitomo Mitsui Trust Group, Inc. 13F CIK 1475365 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	4,139,532	2.05%	-377,074	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Amova Asset Management Americas, Inc. 13F CIK 1480751 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,132,534	2.05%	-384,072	Jun 30, 2026	carried, not yet filed for the newest quarter
14	SILVERCREST ASSET MANAGEMENT GROUP LLC 13F CIK 1232395 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,077,187	2.02%	-164,224	Jun 30, 2026	carried, not yet filed for the newest quarter
15	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,484,633	1.73%	+739,612	Jun 30, 2026	carried, not yet filed for the newest quarter
16	SILVERARC CAPITAL MANAGEMENT, LLC 13F CIK 1816307 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,472,737	1.72%	+296,190	Jun 30, 2026	carried, not yet filed for the newest quarter
17	MACKENZIE FINANCIAL CORP 13F CIK 919859 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,002,694	1.49%	+2,961,958	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,768,990	1.37%	+849,923	Jun 30, 2026	carried, not yet filed for the newest quarter
19	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	2,567,586	1.27%	-816,313	Sep 30, 2026
19.1	Wasatch Ultra Growth Fund Fund S000000879 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	3,196,487	1.59%	-1,969,228	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
20	Soleus Capital Management, L.P. 13F CIK 1802630 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,500,000	1.24%	-8,253,700	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Soleus Capital Master Fund, L.P. 13G CIK 1812275 · Unknown · Jun 30, 2026 Rule 13d-1(c), passive investor	2,500,000	1.24%	-7,328,700	Jun 30, 2026	Rule 13d-1(c), passive investor
22	IEQ CAPITAL, LLC 13F CIK 1779789 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,406,330	1.19%	-36,911	Jun 30, 2026	carried, not yet filed for the newest quarter
23	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,317,802	1.15%	-450,801	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	263,199	0.13%	+3,498	May 31, 2026	Goldman Sachs ETF Trust, not summed
23.2	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	189,689	0.09%	-42,434	Jul 31, 2026	Goldman Sachs Trust, not summed
23.3	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	175,970	0.09%	-35,101	Jul 31, 2026	Goldman Sachs Trust, not summed
23.4	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	94,229	0.05%	0	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
23.5	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	85,331	0.04%	+48,817	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
24	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,307,265	1.14%	+89,164	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
25	Jayaraman Vivek K Insider CIK 1605456 · Jul 16, 2026 Chief Operating Officer, issuer-wide	2,232,211	1.11%	-16,666	Jul 16, 2026	Chief Operating Officer, issuer-wide
26	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,878,275	0.93%	-234,957	Jun 30, 2026	carried, not yet filed for the newest quarter
27	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,733,553	0.86%	+103,484	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	917,893	0.46%	-14,824	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	483,566	0.24%	+74,171	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
27.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	152,391	0.08%	+2,395	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	134,641	0.07%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
28	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,697,977	0.84%	+212,887	Jun 30, 2026	carried, not yet filed for the newest quarter
28.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	102,403	0.05%	+23,546	Jun 30, 2026	Northern Funds, not summed
28.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	29,179	0.01%	-1,394	Jun 30, 2026	Northern Funds, not summed
29	ALGERT GLOBAL LLC 13F CIK 1275218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,491,119	0.74%	+1,372,243	Jun 30, 2026	carried, not yet filed for the newest quarter
30	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,427,346	0.71%	+123,248	Jun 30, 2026	carried, not yet filed for the newest quarter
31	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,412,678	0.70%	+206,941	Jun 30, 2026	carried, not yet filed for the newest quarter
31.1	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	2,175,416	1.08%	+347,948	Jul 31, 2026	Fidelity Salem Street Trust, not summed
31.2	Fidelity Enhanced Small Cap Core ETF Fund S000081807 · Registered fund · Jun 30, 2026 Fidelity Covington Trust, not summed	1,208,271	0.60%	+202,189	Jun 30, 2026	Fidelity Covington Trust, not summed
31.3	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	998,953	0.50%	-14,613	May 31, 2026	Fidelity Concord Street Trust, not summed
31.4	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	349,472	0.17%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
31.5	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	294,930	0.15%	+15,905	May 31, 2026	Fidelity Concord Street Trust, not summed
32	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,159,506	0.58%	+705,455	Jun 30, 2026	carried, not yet filed for the newest quarter
32.1	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	331	0.00%	—	Jun 30, 2026	Columbia ETF Trust I, not summed
33	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,118,262	0.55%	+292,278	Jun 30, 2026	carried, not yet filed for the newest quarter
34	PANAGORA ASSET MANAGEMENT INC 13F CIK 883677 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,093,822	0.54%	+788,576	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Green Kevin Dennis Insider CIK 1459351 · Jun 30, 2026 Chief Financial Officer, issuer-wide	1,062,188	0.53%	-178,363	Jun 30, 2026	Chief Financial Officer, issuer-wide
36	Topline Capital Management, LLC 13F CIK 1792549 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,051,676	0.52%	+1,051,676	Jun 30, 2026	carried, not yet filed for the newest quarter
37	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,029,160	0.51%	+842,053	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Small Cap Core Portfolio Fund S000051867 · Registered fund · Jun 30, 2026 Bernstein Fund Inc, not summed	857,210	0.43%	—	Jun 30, 2026	Bernstein Fund Inc, not summed
38	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,002,562	0.50%	-1,096,791	Jun 30, 2026	carried, not yet filed for the newest quarter
39	VOYA INVESTMENT MANAGEMENT LLC 13F CIK 1068837 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	998,804	0.50%	-108,544	Jun 30, 2026	carried, not yet filed for the newest quarter
40	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	950,460	0.47%	+33,589	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
41	Jensen Chrystal Insider CIK 1564252 · Aug 17, 2026 Chief Legal Officer, issuer-wide	936,657	0.46%	-30,000	Aug 17, 2026	Chief Legal Officer, issuer-wide
42	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	899,385	0.45%	+750,731	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Putnam Dynamic Asset Allocation Growth Fund Fund S000000780 · Registered fund · Jun 30, 2026 Putnam Asset Allocation Funds, not summed	56,839	0.03%	—	Jun 30, 2026	Putnam Asset Allocation Funds, not summed
42.2	Franklin Small Cap Enhanced ETF Fund S000097279 · Registered fund · Jun 30, 2026 Franklin Templeton ETF Trust, not summed	47,888	0.02%	—	Jun 30, 2026	Franklin Templeton ETF Trust, not summed
42.3	Putnam Dynamic Asset Allocation Balanced Fund Fund S000000778 · Registered fund · Jun 30, 2026 Putnam Asset Allocation Funds, not summed	38,797	0.02%	—	Jun 30, 2026	Putnam Asset Allocation Funds, not summed
42.4	Franklin U.S. Small Cap Multifactor Index ETF Fund S000057202 · Registered fund · Jun 30, 2026 Franklin Templeton ETF Trust, not summed	6,174	0.00%	—	Jun 30, 2026	Franklin Templeton ETF Trust, not summed
42.5	Putnam Dynamic Asset Allocation Conservative Fund Fund S000000779 · Registered fund · Jun 30, 2026 Putnam Asset Allocation Funds, not summed	6,125	0.00%	—	Jun 30, 2026	Putnam Asset Allocation Funds, not summed
43	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	868,457	0.43%	-349,873	Jun 30, 2026	carried, not yet filed for the newest quarter
44	PRIMECAP MANAGEMENT CO/CA/ 13F CIK 763212 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	781,800	0.39%	-7,500	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	PRIMECAP Odyssey Aggressive Growth Fund Fund S000005541 · Registered fund · Jul 31, 2026 PRIMECAP Odyssey Funds, not summed	781,800	0.39%	-7,500	Jul 31, 2026	PRIMECAP Odyssey Funds, not summed
45	Benjamin Richard J Insider CIK 1296322 · Mar 12, 2026 Chief Medical Officer, issuer-wide	777,361	0.39%	-101,740	Mar 12, 2026	Chief Medical Officer, issuer-wide
46	IQ EQ FUND MANAGEMENT (IRELAND) Ltd 13F CIK 1620943 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	744,658	0.37%	-36,296	Jun 30, 2026	carried, not yet filed for the newest quarter
47	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	736,682	0.37%	+736,682	Jun 30, 2026	carried, not yet filed for the newest quarter
48	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	678,595	0.34%	+646,984	Jun 30, 2026	carried, not yet filed for the newest quarter
49	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	671,700	0.33%	+92,800	Jun 30, 2026	carried, not yet filed for the newest quarter
50	Russell Investments Group, Ltd. 13F CIK 1692234 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	665,244	0.33%	+199,208	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	U.S. Small Cap Equity Fund Fund S000006864 · Registered fund · Jun 30, 2026 RUSSELL INVESTMENT FUNDS, not summed	36,804	0.02%	0	Jun 30, 2026	RUSSELL INVESTMENT FUNDS, not summed

17 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 264 holders

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Key facts CIK 1020214 CUSIP 157085101 13F (30d) 18 filings 17 filers Visit website Investor relations