CELLDEX THERAPEUTICS INC NEW CLDX
COM NEW · Common Stock · CUSIP 15117B202 · ISIN US15117B2025
American biopharmaceutical company
- SectorHealth care
- IndustryIn Vitro & In Vivo Diagnostic Substances
- HeadquartersHampton, NJ
- Founded1983
- Websitecelldex.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($330.6k this quarter). Holder counts are more reliable. Shares outstanding: 66.4m as of 2025-07-28, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $20.46. Options: 8 managers hold calls ($3.2m notional), 7 hold puts ($5.4m).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 161 |
| Q4 2022 | 168 |
| Q1 2023 | 163 |
| Q2 2023 | 152 |
| Q3 2023 | 146 |
| Q4 2023 | 166 |
| Q1 2024 | 199 |
| Q2 2024 | 185 |
| Q3 2024 | 178 |
| Q4 2024 | 176 |
| Q1 2025 | 173 |
| Q2 2025 | 184 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 74 | 63 |
| Q4 2023 | 92 | 55 |
| Q1 2024 | 123 | 57 |
| Q2 2024 | 103 | 84 |
| Q3 2024 | 86 | 85 |
| Q4 2024 | 91 | 84 |
| Q1 2025 | 90 | 82 |
| Q2 2025 | 114 | 71 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $61.3m | $36.0m | 0.59 |
| Q4 2024 | $25.0m | $17.1m | 0.68 |
| Q1 2025 | $2.1m | $6.1m | 2.87 |
| Q2 2025 | $3.2m | $5.4m | 1.67 |
Biggest buyers
| Vestal Point Capital, LP | Added | +1.6m |
| Logos Global Management LP | New | +600.0k |
| BAKER BROS. ADVISORS LP | Added | +417.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +407.3k |
| SEGALL BRYANT & HAMILL, LLC | New | +387.9k |
| TSP Capital Management Group, LLC | New | +371.4k |
| Pictet Asset Management Holding SA | Added | +342.5k |
| READYSTATE ASSET MANAGEMENT LP | New | +335.0k |
| Woodline Partners LP | Added | +312.0k |
| Commodore Capital LP | Added | +250.0k |
Biggest sellers
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -3.1m |
| EVENTIDE ASSET MANAGEMENT, LLC | Reduced | -2.4m |
| UBS Group AG | Reduced | -627.0k |
| STATE STREET CORP | Reduced | -400.9k |
| Kynam Capital Management, LP | Reduced | -399.3k |
| TSP Capital Management Group, LLC | Sold out | -336.0k |
| Redmile Group, LLC | Reduced | -247.1k |
| MORGAN STANLEY | Reduced | -241.4k |
| NATIXIS | Sold out | -232.2k |
| CITADEL ADVISORS LLC | Reduced | -224.7k |
Biggest calls
| GROUP ONE TRADING LLC | Added | $997.1k49.0k shares |
| CITADEL ADVISORS LLC | Added | $995.1k48.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $643.1k31.6k shares |
| Sender Co & Partners, Inc. | New | $264.6k13.0k shares |
| WOLVERINE TRADING, LLC | New | $217.1k10.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $97.0k4.8k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| FNY Investment Advisers, LLC | New | $020 shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $2.0m97.8k shares |
| Jefferies Financial Group Inc. | Unchanged | $1.6m79.7k shares |
| SIMPLEX TRADING, LLC | Reduced | $750.0k36.9k shares |
| CITADEL ADVISORS LLC | Reduced | $675.6k33.2k shares |
| JANE STREET GROUP, LLC | Reduced | $223.8k11.0k shares |
| GROUP ONE TRADING LLC | Reduced | $109.9k5.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| WELLINGTON MANAGEMENT GROUP LLP 13G · institution +1.1 pts · filed 2026-02-10 | 12.2% |
| FMR LLC 13G · institution +5.1 pts · filed 2026-10-07 | 10.7% |
| BlackRock, Inc. 13G · institution -1.0 pts · filed 2025-04-17 | 7.3% |
| Kynam Capital Management, LP 13G · institution -2.0 pts · filed 2026-08-14 | 6.8% |
| PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution +2.4 pts · filed 2026-08-14 | 6.0% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.2% |
Fell to 5% or below in the last year: Bellevue Group AG (1.5%, 2026-05-15), STATE STREET CORP (4.2%, 2026-05-12), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC), Point72 Asset Management, L.P. (2.6%, 2026-03-10), Commodore Capital LP (4.6%, 2025-11-14)
Insider purchases and sales in Q2 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 7 | $12.1m | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 1 | $308.4k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| Kynam Capital Management, LP 13.37% of their portfolio | 6.1m $124.1m | Reduced -399.3k |
| BlackRock, Inc. 0.00% of their portfolio | 5.6m $112.9m | Added +25.9k |
| FMR LLC 0.01% of their portfolio | 5.4m $110.7m | Added +59.0k |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 5.2m $106.5m | Reduced -3.1m |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.0m $80.5m | Added +58.7k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 3.8m $77.7m | Added +407.3k |
| Commodore Capital LP 4.96% of their portfolio | 3.5m $70.2m | Added +250.0k |
| Bellevue Group AG 1.48% of their portfolio | 3.3m $67.3m | Added +236.0k |
| Point72 Asset Management, L.P. 0.13% of their portfolio | 2.8m $57.0m | Added +180.5k |
| STATE STREET CORP 0.00% of their portfolio | 2.4m $49.0m | Reduced -400.9k |
| Deep Track Capital, LP 1.31% of their portfolio | 2.0m $40.7m | Unchanged |
| Vestal Point Capital, LP 1.87% of their portfolio | 1.8m $35.6m | Added +1.6m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.7m $34.0m | Added +83.2k |
| Woodline Partners LP 0.16% of their portfolio | 1.5m $30.5m | Added +312.0k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.48% of their portfolio | 1.4m $27.6m | Reduced -2.4m |
| Pictet Asset Management Holding SA 0.03% of their portfolio | 1.3m $26.5m | Added +342.5k |
| Polar Capital Holdings Plc 0.13% of their portfolio | 1.2m $25.0m | Reduced -175.0k |
| NOVO HOLDINGS A/S 1.72% of their portfolio | 1.2m $24.4m | Unchanged |
| UBS Group AG 0.00% of their portfolio | 841.2k $17.1m | Reduced -627.0k |
| Eversept Partners, LP 1.72% of their portfolio | 838.7k $17.1m | Added +142.2k |
| Fisher Asset Management, LLC 0.01% of their portfolio | 822.2k $16.7m | Reduced -49.4k |
| Rock Springs Capital Management LP 1.03% of their portfolio | 812.7k $16.5m | Unchanged |
| AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio | 780.0k $15.9m | Added +154.7k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 727.5k $14.8m | Added +31.5k |
| BAKER BROS. ADVISORS LP 0.13% of their portfolio | 665.4k $13.5m | Added +417.7k |
| MORGAN STANLEY 0.00% of their portfolio | 661.5k $13.5m | Reduced -241.4k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 645.7k $13.1m | Added +239.5k |
| Logos Global Management LP 1.63% of their portfolio | 600.0k $12.2m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 575.9k $11.7m | Reduced -1.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 553.1k $11.3m | Added +17.2k |
| 5AM Venture Management, LLC 3.89% of their portfolio | 497.3k $10.1m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 477.2k $9.7m | Added +77.3k |
| SPHERA FUNDS MANAGEMENT LTD. 2.23% of their portfolio | 419.5k $8.5m | Reduced -88.3k |
| SEGALL BRYANT & HAMILL, LLC 0.11% of their portfolio | 387.9k $7.9m | New |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 378.7k $7.7m | Reduced -224.7k |
| TSP Capital Management Group, LLC 2.37% of their portfolio | 371.4k $7.6m | New |
| Redmile Group, LLC 0.74% of their portfolio | 343.0k $7.0m | Reduced -247.1k |
| READYSTATE ASSET MANAGEMENT LP 0.28% of their portfolio | 335.0k $6.8m | New |
| Tetragon Partners GP Ltd 1.16% of their portfolio | 316.1k $6.4m | Added +55.1k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 276.2k $5.6m | Added +31.2k |
| Nuveen, LLC 0.00% of their portfolio | 265.6k $5.4m | Reduced -163.6k |
| BARCLAYS PLC 0.00% of their portfolio | 262.7k $5.3m | Added +146.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 233.8k $4.8m | Reduced -7.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 213.8k $4.4m | Added +82.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 211.3k $4.3m | Added +106.1k |
| Corient Private Wealth LP 0.01% of their portfolio | 201.7k $4.1m | New |
| SILVERARC CAPITAL MANAGEMENT, LLC 0.83% of their portfolio | 198.4k $4.0m | Reduced -7.5k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 194.1k $3.9m | Added +20.2k |
| AXA S.A. 0.01% of their portfolio | 185.1k $3.8m | Added +297 |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 181.4k $3.7m | Added +34.8k |
| ALGERT GLOBAL LLC 0.08% of their portfolio | 181.0k $3.7m | Added +47.4k |
| Mirador Capital Partners LP 0.52% of their portfolio | 158.7k $3.2m | Added +30.8k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 143.9k $2.9m | New |
| Cinctive Capital Management LP 0.16% of their portfolio | 138.0k $2.8m | Added +94.6k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 128.6k $2.6m | Reduced -9.7k |
| TD Asset Management Inc 0.00% of their portfolio | 127.9k $2.6m | Added +49.0k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 124.5k $2.5m | Added +29.8k |
| Schonfeld Strategic Advisors LLC 0.02% of their portfolio | 118.8k $2.4m | New |
| Swiss National Bank 0.00% of their portfolio | 114.1k $2.3m | Reduced -1.6k |
| Trexquant Investment LP 0.03% of their portfolio | 112.5k $2.3m | Added +34.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 111.4k $2.3m | Added +17.7k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 106.6k $2.2m | Added +8.3k |
| HighVista Strategies LLC 0.80% of their portfolio | 106.6k $2.2m | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 101.2k $2.1m | Added +100.7k |
| CITIGROUP INC 0.00% of their portfolio | 99.2k $2.0m | Reduced -31.5k |
| PDT Partners, LLC 0.11% of their portfolio | 97.8k $2.0m | Added +76.9k |
| SummitTX Capital, L.P. 0.09% of their portfolio | 96.1k $2.0m | Added +10.0k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 84.7k $1.7m | Added +49.9k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 80.7k $1.6m | Added +52.1k |
| Exome Asset Management LLC 1.26% of their portfolio | 73.0k $1.5m | New |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 71.6k $1.5m | Reduced -36.8k |
| Legal & General Group Plc 0.00% of their portfolio | 71.2k $1.4m | Added +7.0k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 65.5k $1.3m | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 62.9k $1.3m | Added +10.4k |
| Y-Intercept (Hong Kong) Ltd 0.03% of their portfolio | 58.4k $1.2m | New |
| ADAR1 Capital Management, LLC 0.19% of their portfolio | 57.5k $1.2m | Added +42.9k |
| Jefferies Financial Group Inc. 0.02% of their portfolio | 57.0k $1.2m | Added +2.0k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 55.5k $1.1m | Reduced -662 |
| HRT FINANCIAL LP 0.01% of their portfolio | 48.4k $985.0k | Added +27.0k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.00% of their portfolio | 48.1k $978.8k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 43.3k $880.7k | Added +9.9k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 42.3k $860.5k | New |
| INTECH INVESTMENT MANAGEMENT LLC 0.01% of their portfolio | 41.9k $852.7k | Added +7.7k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 40.6k $826.2k | New |
| Perbak Capital Partners LLP 0.19% of their portfolio | 40.4k $822.3k | New |
| Sovran Advisors, LLC 0.09% of their portfolio | 39.5k $842.0k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 39.4k $801.3k | Reduced -4.1k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 39.0k $793.7k | Unchanged |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.01% of their portfolio | 36.7k $747.0k | Reduced -2.6k |
| ALPS ADVISORS INC 0.00% of their portfolio | 35.8k $728.8k | Reduced -14.1k |
| Verition Fund Management LLC 0.00% of their portfolio | 33.9k $689.3k | Added +15.5k |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.06% of their portfolio | 31.1k $632.2k | New |
| Creative Planning 0.00% of their portfolio | 29.9k $608.5k | Added +6.2k |
| Jump Financial, LLC 0.01% of their portfolio | 29.5k $600.4k | Added +10.3k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 28.9k $587.3k | Reduced -185.6k |
| SIMPLEX TRADING, LLC 0.02% of their portfolio | 28.3k $575.0k | Added +26.2k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 27.6k $562.7k | New |
| GUGGENHEIM CAPITAL LLC 0.00% of their portfolio | 26.0k $529.0k | Added +1.2k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 25.6k $522.3k | Unchanged |
| DekaBank Deutsche Girozentrale 0.00% of their portfolio | 25.0k $514.0k | Unchanged |