Cerus Corporation (CERS) Ownership
CERS ownership summary
as of October 18, 2026- Institutions
- 73.0% of shares outstanding
- Insiders
- 3.61% of shares outstanding
- Shares outstanding
- 201.5M
- Float
- 195.3M shares available to trade
- Short interest
- 8.98% 17.6M shares short
- Days to cover
- 10.54 short interest down 2.3% vs prior month
- Institutions 73.04%
- Insiders 3.61%
- Other investors 23.34%
CERS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 11.02% | 22.2M | $48.4M | +639,708 (+3.0%) | June 30, 2026 |
| 2 | ARK Investment Management LLC | 8.90% | 17.9M | $39.1M | −1.2M (−6.4%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 4.25% | 8.6M | $18.7M | +431,646 (+5.3%) | June 30, 2026 |
| 4 | Baker Bros Advisors LP | 3.17% | 6.4M | $13.9M | −3.6M (−36.1%) | June 30, 2026 |
| 5 | D. E. Shaw & Co LP | 2.72% | 5.5M | $12.0M | +1.8M (+47.0%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 2.54% | 5.1M | $11.2M | +481,579 (+10.4%) | June 30, 2026 |
| 7 | State Street Corp | 2.36% | 4.8M | $10.4M | +539,060 (+12.8%) | June 30, 2026 |
| 8 | RIMA MANAGEMENT, LLC | 2.29% | 4.6M | $10.1M | +500,000 (+12.2%) | June 30, 2026 |
| 9 | Acadian Asset Management LLC | 2.12% | 4.3M | $9.3M | +560,573 (+15.1%) | June 30, 2026 |
| 10 | Sumitomo Mitsui Trust Group Inc | 2.05% | 4.1M | $9.0M | −377,074 (−8.3%) | June 30, 2026 |
| 11 | Amova Asset Management Americas, Inc | 2.05% | 4.1M | $9.0M | −384,072 (−8.5%) | June 30, 2026 |
| 12 | Silvercrest Asset Management Group LLC | 2.02% | 4.1M | $8.9M | −164,224 (−3.9%) | June 30, 2026 |
| 13 | Two Sigma Investments LLC | 1.73% | 3.5M | $7.6M | +739,612 (+26.9%) | June 30, 2026 |
| 14 | SILVERARC CAPITAL MANAGEMENT, LLC | 1.72% | 3.5M | $7.6M | +296,190 (+9.3%) | June 30, 2026 |
| 15 | Wasatch Advisors LP | 1.68% | 3.4M | $7.4M | −1.9M (−35.9%) | June 30, 2026 |
| 16 | Mackenzie Investments | 1.49% | 3.0M | $6.5M | +3.0M (+7,271.1%) | June 30, 2026 |
| 17 | Vanguard Portfolio Management, LLC | 1.37% | 2.8M | $6.0M | +849,923 (+44.3%) | June 30, 2026 |
| 18 | Soleus Capital Management, L.P. | 1.24% | 2.5M | $5.5M | −8.3M (−76.8%) | June 30, 2026 |
| 19 | IEQ CAPITAL, LLC | 1.19% | 2.4M | $5.2M | −36,911 (−1.5%) | June 30, 2026 |
| 20 | The Goldman Sachs Group Inc | 1.15% | 2.3M | $5.1M | −450,801 (−16.3%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 9.8M shares and 9 cut 16.4M.
CERS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | ARK Innovation ETF | 5.13% | 10.3M | $22.5M | −808,146 (−7.3%) | September 30, 2026 |
| 2 | ARK Genomic Revolution ETF | 3.76% | 7.6M | $16.5M | +18,524 (+0.2%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.01% | 6.1M | $13.2M | — | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 2.59% | 5.2M | $11.4M | −60,032 (−1.1%) | September 30, 2026 |
| 5 | Amova ARK Disruptive Innovation A USD | 1.97% | 4.0M | $8.7M | +589,343 (+17.4%) | August 31, 2026 |
| 6 | Wasatch Ultra Growth | 1.59% | 3.2M | $7.0M | −2.0M (−38.1%) | June 30, 2026 |
| 7 | Fidelity Small Cap Index | 1.08% | 2.2M | $4.7M | +16,293 (+0.8%) | July 31, 2026 |
| 8 | Canada Life US Small-Mid Cap Growth F | 1.03% | 2.1M | $4.5M | +1.5M (+258.6%) | July 31, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.91% | 1.8M | $4.0M | −2,315 (−0.1%) | September 30, 2026 |
| 10 | Fidelity Enhanced Small Cap Core ETF | 0.85% | 1.7M | $3.7M | +3,573 (+0.2%) | September 30, 2026 |
| 11 | BlackRock Advantage Small Cap Core Instl | 0.76% | 1.5M | $3.3M | — | August 31, 2026 |
| 12 | Vanguard Russell 2000 ETF | 0.57% | 1.2M | $2.5M | +12,555 (+1.1%) | September 30, 2026 |
| 13 | Schwab US Small-Cap ETF™ | 0.52% | 1.1M | $2.3M | +702 (+0.1%) | September 30, 2026 |
| 14 | BSF Systematic US Eq Abs Ret A2 USD | 0.52% | 1.0M | $2.3M | +348,580 (+50.6%) | December 31, 2025 |
| 15 | iShares U.S. Small-Cap Eq Fac ETF | 0.49% | 988K | $2.2M | — | September 30, 2026 |
| 16 | Fidelity Extended Market Index | 0.49% | 980K | $2.1M | −15,375 (−1.5%) | August 31, 2026 |
| 17 | AB Small Cap Core Z | 0.43% | 857K | $1.9M | — | August 31, 2026 |
| 18 | PRIMECAP Odyssey Aggressive Growth | 0.39% | 782K | $1.7M | −7,500 (−1.0%) | June 30, 2026 |
| 19 | Stt Strt® SPDR® S&P®HlthCrEqpmntETF | 0.37% | 745K | $1.6M | −18,188 (−2.4%) | September 30, 2026 |
| 20 | iShares Micro-Cap ETF | 0.31% | 627K | $1.4M | −4,327 (−0.7%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CERS insider transactions
latest 12| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-12 | Kevin Dennis Green | Sell | $1.66 | 127,544 | $211,723 |
| 2026-03-12 | Richard J Benjamin | Sell | $1.66 | 101,740 | $168,888 |
| 2026-03-12 | Vivek K Jayaraman | Sell | $1.66 | 165,200 | $274,232 |
| 2026-03-12 | William Mariner Greenman | Sell | $1.66 | 447,757 | $743,277 |
| 2026-03-09 | Richard J Benjamin | Sell | $1.88 | 40,426 | $76,001 |
| 2026-03-06 | Chrystal Jensen | Sell | $2.01 | 30,845 | $61,998 |
| 2026-03-06 | Kevin Dennis Green | Sell | $2.01 | 27,796 | $55,870 |
| 2026-03-06 | Richard J Benjamin | Sell | $2.01 | 24,235 | $48,712 |
| 2026-03-06 | Vivek K Jayaraman | Sell | $2.01 | 34,094 | $68,529 |
| 2026-03-06 | William Mariner Greenman | Sell | $2.01 | 78,187 | $157,156 |
| 2026-03-05 | Kevin Dennis Green | Sell | $2.06 | 55,225 | $113,764 |
| 2026-03-05 | Richard J Benjamin | Sell | $2.06 | 61,233 | $126,140 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CERS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CERS
Institutional investors own 73.0% of Cerus's shares and insiders 3.61%. The largest holder is BlackRock Inc with 11.02% of the shares (22.2M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 9 reduced their stake in the latest filings. Short interest is 8.98% of the float, or 10.54 days of average trading volume. The share count rose 143.8% since 2014.
Related: CERS analyst forecast, CERS key metrics. See the CERS stock overview for the latest quote and news.
CERS ownership FAQ
Who owns the most Cerus stock?
The largest shareholders of Cerus are BlackRock Inc (11.02%), ARK Investment Management LLC (8.90%), Vanguard Capital Management, LLC (4.25%), Baker Bros Advisors LP (3.17%), D. E. Shaw & Co LP (2.72%).
What percentage of Cerus is owned by institutions?
Institutions hold 73.0% of Cerus's shares outstanding; insiders hold 3.61%.
Which funds own Cerus?
The largest fund holders of Cerus are ARK Innovation ETF (5.13%), ARK Genomic Revolution ETF (3.76%), Vanguard MStar Total Stk Mkt Idx Invest (3.01%), iShares Russell 2000 ETF (2.59%), Amova ARK Disruptive Innovation A USD (1.97%).
What is Cerus's short interest?
17.6M shares of Cerus were sold short, 8.98% of the float; at the average daily volume it would take 10.54 days to cover.
Are insiders buying or selling Cerus?
Of the latest 12 reported insider transactions in Cerus (since March 5, 2026), 0 were purchases and 12 were sales.
How many shares of Cerus are outstanding?
Cerus has 201.5M shares outstanding, of which 195.3M are in the public float.