Cerus Corp (CERS) shareholders
CERSNasdaqSurgical & Medical Instruments & ApparatusFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 2, 2026Score 6/3023% below fair value
$1.99+0.05 (+2.32%)
Close on Nov 13, 2026Market cap $400.03MP/E –Yield –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
74.8%
151M of 202M shares
Institutional holders
185
35 new, 16 sold out
Net institutional buying
-1M
In Q2 2026
Insider trades, 12 months
0 buys · 25 sales
Net sold $3.34M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| ARK Investment Management LLC Joint filing with Catherine D. Wood (10.05%) | 19,207,604 | 10.05% | 13G (passive) amendment | Jun 30, 2025 |
| Catherine D. Wood Joint filing with ARK Investment Management LLC (8.95%) | 17,932,099 | 8.95% | 13G (passive) amendment | Jun 30, 2026 |
| BlackRock, Inc. | 13,728,396 | 7.60% | 13G (passive) amendment | Dec 31, 2023 |
| Guy Levy Joint filing with Soleus Capital Master Fund, L.P. (5.10%), Soleus Capital, LLC (5.10%) and 3 more | 9,828,700 | 5.10% | 13G (passive) | Mar 23, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CERS | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 22,215,127 | 11.02% | $64.87M | +639,708 | 0.00% |
| ARK Investment Management LLC | 17,932,099 | 8.90% | $52.36M | −1,229,049 | 0.34% |
| Vanguard Capital Management LLC | 8,563,424 | 4.25% | $25.01M | +431,646 | 0.00% |
| Baker Bros. Advisors LP | 6,395,431 | 3.17% | $18.67M | −3,612,914 | 0.09% |
| D. E. Shaw & Co., Inc. | 5,485,983 | 2.72% | $16.02M | +1,754,832 | 0.01% |
| Geode Capital Management, LLC | 5,119,019 | 2.54% | $14.95M | +481,579 | 0.00% |
| State Street Corp | 4,753,962 | 2.36% | $13.88M | +539,060 | 0.00% |
| Senvest Management, LLC | 4,614,061 | 2.29% | $13.47M | +500,000 | 0.40% |
| Acadian Asset Management LLC | 4,270,074 | 2.12% | $12.46M | +560,573 | 0.01% |
| Sumitomo Mitsui Trust Holdings, Inc. | 4,139,532 | 2.05% | $12.09M | −377,074 | 0.01% |
| Nikko Asset Management Americas, Inc. | 4,132,534 | 2.05% | $12.07M | −384,072 | 0.16% |
| Silvercrest Asset Management Group LLC | 4,077,187 | 2.02% | $11.91M | −164,224 | 0.08% |
| Two Sigma Investments, LP | 3,484,633 | 1.73% | $10.18M | +739,612 | 0.01% |
| Silverarc Capital Management, LLC | 3,472,737 | 1.72% | $10.14M | +296,190 | 1.05% |
| Wasatch Advisors LP | 3,383,899 | 1.68% | $9.88M | −1,897,237 | 0.06% |
| Mackenzie Financial Corp | 3,002,694 | 1.49% | $8.77M | +2,961,958 | 0.01% |
| Vanguard Portfolio Management LLC | 2,768,990 | 1.37% | $8.09M | +849,923 | 0.00% |
| Soleus Capital Management, L.P. | 2,500,000 | 1.24% | $7.30M | −8,253,700 | 0.25% |
| Ieq Capital, LLC | 2,406,330 | 1.19% | $7.03M | −36,911 | 0.03% |
| Goldman Sachs Group Inc | 2,317,802 | 1.15% | $6.77M | −450,801 | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 185 | 151M | 74.8% | 35 / 72 | 53 / 16 | 21M | 22M |
| Q1 2026 | 169 | 152M | 75.2% | 26 / 58 | 55 / 14 | 27M | 10M |
| Q4 2025 | 161 | 147M | 72.8% | 24 / 61 | 52 / 15 | 14M | 9M |
| Q3 2025 | 155 | 142M | 70.5% | 14 / 67 | 45 / 13 | 7M | 11M |
| Q2 2025 | 156 | 146M | 72.5% | 20 / 55 | 51 / 19 | 11M | 17M |
| Q1 2025 | 155 | 152M | 75.4% | 17 / 53 | 53 / 14 | 13M | 8M |
| Q4 2024 | 154 | 148M | 73.3% | 22 / 62 | 32 / 14 | 12M | 13M |
| Q3 2024 | 147 | 149M | 74.0% | 17 / 52 | 41 / 10 | 23M | 7M |
| Q2 2024 | 141 | 148M | 73.4% | 20 / 45 | 41 / 23 | 7M | 9M |
| Q1 2024 | 144 | 149M | 74.1% | 28 / 39 | 50 / 23 | 14M | 9M |
| Q4 2023 | 140 | 144M | 71.3% | 29 / 36 | 49 / 27 | 12M | 14M |
| Q3 2023 | 142 | 146M | 72.5% | 18 / 43 | 46 / 32 | 13M | 13M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
135 funds held CERS in Q2 2026, 68% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of CERS | Value | % of fund | As of |
|---|---|---|---|---|---|
| ARK Innovation ETF | 8,284,570 | 4.11% | $17.81M | 0.32% | Jul 31, 2026 |
| ARK Genomic Revolution ETF | 7,223,126 | 3.58% | $15.53M | 1.00% | Jul 31, 2026 |
| Vanguard Total Stock Market Index Fund | 6,075,566 | 3.01% | $17.74M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 5,183,366 | 2.57% | $15.14M | 0.02% | Jun 30, 2026 |
| Wasatch Ultra Growth Fund | 3,196,487 | 1.59% | $9.33M | 2.02% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 2,307,265 | 1.14% | $6.74M | 0.01% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 2,175,416 | 1.08% | $4.68M | 0.01% | Jul 31, 2026 |
| iShares Russell 2000 Growth ETF | 1,868,339 | 0.93% | $5.46M | 0.04% | Jun 30, 2026 |
| BlackRock Advantage Small Cap Core Fund | 1,524,439 | 0.76% | $4.63M | 0.09% | May 29, 2026 |
| Fidelity Enhanced Small Cap Core ETF | 1,208,271 | 0.60% | $3.53M | 0.06% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 998,953 | 0.50% | $3.04M | 0.01% | May 31, 2026 |
| iShares U.S. Small-Cap Equity Factor ETF | 965,854 | 0.48% | $2.08M | 0.05% | Jul 31, 2026 |
| Vanguard Russell 2000 Index Fund | 950,460 | 0.47% | $2.89M | 0.02% | May 31, 2026 |
| Schwab U.S. Small-Cap ETF | 917,893 | 0.46% | $2.79M | 0.01% | May 31, 2026 |
| Small Cap Core Portfolio | 857,210 | 0.43% | $2.50M | 0.29% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| William Mariner Greenman | President and CEO, Director | 5,154,955 | 2.56% | Jul 2, 2026 |
| Chrystal Jensen | Chief Legal Officer | 936,657 | 0.46% | Aug 17, 2026 |
| Vivek K. Jayaraman | Chief Executive Officer | 2,232,211 | 1.11% | Jul 20, 2026 |
| Kevin Dennis Green | Chief Financial Officer | 1,062,188 | 0.53% | Jul 2, 2026 |
| Richard J. Benjamin | Chief Medical Officer | 777,361 | 0.39% | Mar 16, 2026 |
| Eric Bjerkholt | Director | 261,679 | 0.13% | Jun 11, 2026 |
| Dean A. Gregory | Director | 146,725 | 0.07% | Jun 2, 2026 |
| Frank Witney | Director | 340,059 | 0.17% | Jun 2, 2026 |
| Jami K. Nachtsheim | Director | 268,362 | 0.13% | Jun 2, 2026 |
| Ann Lucena | Director | 232,284 | 0.12% | Jun 2, 2026 |
| Hua Shan | Director | 192,386 | 0.10% | Jun 2, 2026 |
| Timothy L. Moore | Director | 205,073 | 0.10% | Jun 4, 2025 |
| Daniel N. Swisher JR | Director | 207,045 | 0.10% | Jun 4, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Chrystal Jensen Chief Legal Officer | Aug 17, 2026 | Sale(10b5-1 plan) | −30,000 | $2.98 | $89.40K | 936,657 |
| Vivek K. Jayaraman Chief Executive Officer | Jul 16, 2026 | Sale(10b5-1 plan) | −16,666 | $3.16 | $52.66K | 2,232,211 |
| Vivek K. Jayaraman Chief Operating Officer | Jul 1, 2026 | Award | +554,529 | – | – | 2,248,877 |
| Vivek K. Jayaraman Chief Operating Officer | Jun 30, 2026 | Sale(10b5-1 plan) | −42,359 | $2.94 | $124.54K | 1,694,348 |
| Vivek K. Jayaraman Chief Operating Officer | Jun 30, 2026 | Award | −80,000 | – | – | 1,736,707 |
| William Mariner Greenman President and CEO, Director | Jun 30, 2026 | Award | −192,500 | – | – | 5,154,955 |
| William Mariner Greenman President and CEO, Director | Jun 30, 2026 | Sale(10b5-1 plan) | −101,919 | $2.94 | $299.64K | 5,053,036 |
| Kevin Dennis Green Chief Financial Officer | Jun 30, 2026 | Sale(10b5-1 plan) | −33,676 | $2.94 | $99.01K | 1,062,188 |
| Kevin Dennis Green Chief Financial Officer | Jun 30, 2026 | Award | −63,600 | – | – | 1,095,864 |
| Chrystal Jensen Chief Legal Officer | Jun 30, 2026 | Award | −55,000 | – | – | 990,986 |
| Chrystal Jensen Chief Legal Officer | Jun 30, 2026 | Sale(10b5-1 plan) | −24,329 | $2.94 | $71.53K | 966,657 |
| Eric Bjerkholt Director | Jun 9, 2026 | Sale | −20,454 | $2.60 | $53.18K | 261,679 |
| Hua Shan Director | Jun 2, 2026 | Award | +60,000 | – | – | 192,386 |
| Frank Witney Director | Jun 2, 2026 | Award | +60,000 | – | – | 340,059 |
| Eric Bjerkholt Director | Jun 2, 2026 | Award | +60,000 | – | – | 282,133 |
| Dean A. Gregory Director | Jun 2, 2026 | Award | +60,000 | – | – | 146,725 |
| Jami K. Nachtsheim Director | Jun 2, 2026 | Award | +60,000 | – | – | 268,362 |
| Ann Lucena Director | Jun 2, 2026 | Award | +60,000 | – | – | 232,284 |
| Vivek K. Jayaraman Chief Operating Officer | May 29, 2026 | Sale(10b5-1 plan) | −16,667 | $3.00 | $50.00K | 1,656,707 |
| Vivek K. Jayaraman Chief Operating Officer | May 1, 2026 | Sale(10b5-1 plan) | −16,667 | $3.00 | $50.00K | 1,673,374 |
| Kevin Dennis Green Chief Financial Officer | Apr 1, 2026 | Award | +200,000 | – | – | 1,240,551 |
| Chrystal Jensen Chief Legal Officer | Apr 1, 2026 | Award | +200,000 | – | – | 1,146,131 |
| Kevin Dennis Green Chief Financial Officer | Mar 12, 2026 | Sale(10b5-1 plan) | −127,544 | $1.66 | $211.72K | 1,040,551 |
| Richard J. Benjamin Chief Medical Officer | Mar 12, 2026 | Sale(10b5-1 plan) | −101,740 | $1.66 | $168.89K | 777,361 |
| William Mariner Greenman President and CEO, Director | Mar 12, 2026 | Sale(10b5-1 plan) | −447,757 | $1.66 | $743.28K | 4,998,493 |
| Vivek K. Jayaraman Chief Operating Officer | Mar 12, 2026 | Sale(10b5-1 plan) | −165,200 | $1.66 | $274.23K | 1,747,674 |
| Richard J. Benjamin Chief Medical Officer | Mar 9, 2026 | Sale(10b5-1 plan) | −40,426 | $1.88 | $76.00K | 879,101 |
| Richard J. Benjamin Chief Medical Officer | Mar 9, 2026 | Sale(10b5-1 plan) | −40,426 | $1.88 | $76.00K | 879,101 |
| Richard J. Benjamin Chief Medical Officer | Mar 6, 2026 | Sale(10b5-1 plan) | −24,235 | $2.01 | $48.71K | 919,527 |
| William Mariner Greenman President and CEO, Director | Mar 6, 2026 | Sale(10b5-1 plan) | −78,187 | $2.01 | $157.16K | 5,446,250 |
| Richard J. Benjamin Chief Medical Officer | Mar 6, 2026 | Sale(10b5-1 plan) | −24,235 | $2.01 | $48.71K | 919,527 |
| Vivek K. Jayaraman Chief Operating Officer | Mar 6, 2026 | Sale(10b5-1 plan) | −34,094 | $2.01 | $68.53K | 1,912,874 |
| Chrystal Jensen Chief Legal Officer | Mar 6, 2026 | Sale(10b5-1 plan) | −30,845 | $2.01 | $62.00K | 1,059,139 |
| Kevin Dennis Green Chief Financial Officer | Mar 6, 2026 | Sale(10b5-1 plan) | −27,796 | $2.01 | $55.87K | 1,168,095 |
| Richard J. Benjamin Chief Medical Officer | Mar 5, 2026 | Sale(10b5-1 plan) | −61,233 | $2.06 | $126.14K | 943,762 |
| Richard J. Benjamin Chief Medical Officer | Mar 5, 2026 | Award | +55,220 | – | – | 1,004,995 |
| William Mariner Greenman President and CEO, Director | Mar 5, 2026 | Award | +193,270 | – | – | 5,524,437 |
| Richard J. Benjamin Chief Medical Officer | Mar 5, 2026 | Award | +55,220 | – | – | 1,004,995 |
| Richard J. Benjamin Chief Medical Officer | Mar 5, 2026 | Sale(10b5-1 plan) | −61,233 | $2.06 | $126.14K | 943,762 |
| Vivek K. Jayaraman Chief Operating Officer | Mar 5, 2026 | Award | +80,320 | – | – | 1,946,968 |
| Chrystal Jensen Chief Legal Officer | Mar 5, 2026 | Award | +55,220 | – | – | 1,083,514 |
| Kevin Dennis Green Chief Financial Officer | Mar 5, 2026 | Sale(10b5-1 plan) | −55,225 | $2.06 | $113.76K | 1,195,891 |
| Kevin Dennis Green Chief Financial Officer | Mar 5, 2026 | Award | +63,854 | – | – | 1,251,116 |
| Kevin Dennis Green Chief Financial Officer | Mar 2, 2026 | Award | +300,000 | – | – | 1,187,262 |
| William Mariner Greenman President and CEO, Director | Mar 2, 2026 | Award | +1,200,000 | – | – | 5,331,167 |
| Vivek K. Jayaraman Chief Operating Officer | Mar 2, 2026 | Award | +420,000 | – | – | 1,866,648 |
| Richard J. Benjamin Chief Medical Officer | Mar 2, 2026 | Award | +264,000 | – | – | 949,775 |
| Chrystal Jensen Chief Legal Officer | Mar 2, 2026 | Award | +300,000 | – | – | 1,028,294 |
| Chrystal Jensen Chief Legal Officer | Nov 24, 2025 | Sale(10b5-1 plan) | −55,000 | $1.70 | $93.50K | 728,294 |
| Dean A. Gregory Director | Aug 25, 2025 | Buy | +25,000 | $1.25 | $31.25K | 86,725 |
| Ann Lucena Director | Jun 3, 2025 | Award | +60,000 | – | – | 172,284 |
| Jami K. Nachtsheim Director | Jun 3, 2025 | Award | +60,000 | – | – | 208,362 |
| Daniel N. Swisher JR Director | Jun 3, 2025 | Award | +60,000 | – | – | 207,045 |
| Frank Witney Director | Jun 3, 2025 | Award | +60,000 | – | – | 280,059 |
| Timothy L. Moore Director | Jun 3, 2025 | Award | +60,000 | – | – | 205,073 |
| Hua Shan Director | Jun 3, 2025 | Award | +60,000 | – | – | 132,386 |
| Eric Bjerkholt Director | Jun 3, 2025 | Award | +60,000 | – | – | 222,133 |
| William Mariner Greenman President and CEO, Director | Mar 14, 2025 | Sale(10b5-1 plan) | −122,827 | $1.45 | $178.10K | 4,115,845 |
| Richard J. Benjamin Chief Medical Officer | Mar 14, 2025 | Sale(10b5-1 plan) | −30,075 | $1.45 | $43.61K | 685,775 |
| Kevin Dennis Green Chief Financial Officer | Mar 14, 2025 | Sale(10b5-1 plan) | −36,740 | $1.45 | $53.27K | 875,867 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of float
7.72%
15M shares short
Days to cover
8.2
At 2M shares a day
Change since last report
-12.0%
From 17M shares
Short volume, 20 days
49.2%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Cerus's stock actually held short. Settlement fails (shares not delivered on time) peaked at 2,572 shares on Aug 24, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Chrystal Jensen Officer | Aug 17, 2026 | 30,000 | $89.53K | Aug 17, 2026 | Restricted Stock |
| Vivek K. Jayaraman Officer | Jul 16, 2026 | 16,666 | $52.66K | Jul 16, 2026 | Restricted Stock |
| Eric Bjerkholt Director | Jun 9, 2026 | 20,454 | $53.18K | Jun 9, 2026 | Restricted Stock |
| Vivek K. Jayaraman Officer | May 29, 2026 | 16,667 | $50.00K | May 29, 2026 | Restricted Stock |
| Richard J. Benjamin Officer | May 1, 2026 | 76,209 | $214.63K | May 1, 2026 | Restricted Stock |
| Vivek K. Jayaraman Officer | May 1, 2026 | 16,667 | $50.00K | May 1, 2026 | Restricted Stock |
| Richard J. Benjamin Officer | Mar 9, 2026 | 40,426 | $76.03K | Mar 9, 2026 | Restricted Stock |
| Richard J. Benjamin Officer | Mar 5, 2026 | 61,233 | $126.30K | Mar 5, 2026 | Restricted Stock |
| Kevin Dennis Green Officer | Mar 5, 2026 | 55,225 | $113.90K | Mar 5, 2026 | Restricted Stock |
| Chrystal Jensen Officer | Nov 24, 2025 | 55,000 | $93.50K | Nov 24, 2025 | Restricted Stock |
| Chrystal Jensen Officer | Mar 4, 2025 | 60,000 | $90.00K | Mar 4, 2025 | RESTRICTED STOCK |
| Richard J. Benjamin Officer | Mar 3, 2025 | 51,254 | $80.82K | Mar 3, 2025 | Restricted Stock |
| Kevin Dennis Green Officer | Mar 3, 2025 | 60,656 | $95.65K | Mar 3, 2025 | Employee Stock Purchase Plan |
| Chrystal Jensen Officer | Dec 16, 2024 | 16,667 | $28.63K | Dec 16, 2024 | Restricted Stock |
| Eric Bjerkholt Director | Dec 12, 2024 | 20,000 | $35.70K | Dec 12, 2024 | OPEN MARKET |
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