SEC Form 4 · Updated Daily
CLDX
— CELLDEX THERAPEUTICS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Paluck Thomas S | Reporting Owner | 4,300,114 | 2007-01-31 | — |
| MEDAREX INC | 10%+ Owner | 2,960,848 | 2009-06-24 | S |
| RYAN UNA S | Director · Officer | 899,213 | 2007-07-02 | L |
| van den Broek Richard | Director | 233,500 | 2016-06-08 | A |
| McMahon Gerald PhD | Director | 180,697 | 2018-12-03 | F |
| CATLIN AVERY W | Director | 83,586 | 2016-09-02 | M |
| SHANNON TIMOTHY M | Director | 83,212 | 2014-06-04 | A |
| ELLBERGER LARRY | Director | 73,500 | 2017-06-15 | A |
| Heath-Chiozzi Margo | Officer | 71,752 | 2024-06-03 | M |
| Wright Richard M. | Reporting Owner | 70,131 | 2025-11-13 | M |
| PENNER HARRY JR | Director | 41,916 | 2017-06-15 | A |
| Shoos Karen L. | Director | 41,833 | 2017-06-15 | A |
| Marucci Anthony S | Director · Officer | 40,284 | 2024-11-11 | P |
| Crowley Elizabeth | Officer | 39,074 | 2024-06-14 | M |
| CONRAD HERBERT J | Director | 38,500 | 2017-06-15 | A |
| Martin Samuel Bates | Officer | 32,942 | 2026-01-02 | M |
| Jimenez Freddy A. | Officer | 30,796 | 2025-12-04 | S |
| Elston George | Officer | 28,500 | 2016-06-08 | A |
| KELER TIBOR | Officer | 24,217 | 2022-12-07 | M |
| Cavanaugh Sarah | Officer | 22,713 | 2024-05-30 | M |
| PEPIN RONALD | Officer | 20,097 | 2025-12-15 | M |
| Young Diane C. | Officer | 17,115 | 2024-06-11 | M |
| Brownlie Keith L | Director | 10,000 | 2017-06-15 | A |
| Newbold Ronald C | Officer | 5,868 | 2009-01-06 | A |
| SCHALLER CHARLES R | Director | 5,000 | 2010-09-09 | P |
| FREEMAN PAULA R | Reporting Owner | 2,955 | 2008-01-02 | L |
| MARINO JAMES J | Director | 2,204 | 2024-11-18 | G |
| PAREKH RAJESH R | Director | 2,000 | 2010-09-22 | A |
| Keilani Taha | Reporting Owner | 2,000 | 2008-01-02 | L |
| Davis Thomas Andrew | Officer | 1,489 | 2010-09-16 | P |
| Lorantis Holdings LTD | 10%+ Owner | 0 | 2008-04-07 | J |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-06-25 | PENNER HARRY JR | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | CONRAD HERBERT J | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | MARINO JAMES J | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | Brownlie Keith L | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | Cohen Cheryl | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | NEIL GARRY ARTHUR | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | Jain Rita | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | Torres Denice | Grant / award (derivative) | 26,000 | $0.00 | 26,000 |
| 2026-06-25 | Marucci Anthony S | Grant / award (derivative) | 375,000 | $0.00 | 375,000 |
| 2026-06-25 | KELER TIBOR | Grant / award (derivative) | 115,000 | $0.00 | 115,000 |
| 2026-06-25 | PEPIN RONALD | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2026-06-25 | Crowley Elizabeth | Grant / award (derivative) | 100,000 | $0.00 | 100,000 |
| 2026-06-25 | Cavanaugh Sarah | Grant / award (derivative) | 95,000 | $0.00 | 95,000 |
| 2026-06-25 | Martin Samuel Bates | Grant / award (derivative) | 93,000 | $0.00 | 93,000 |
| 2026-06-25 | Heath-Chiozzi Margo | Grant / award (derivative) | 95,000 | $0.00 | 95,000 |
| 2026-06-25 | Young Diane C. | Grant / award (derivative) | 57,000 | $0.00 | 57,000 |
| 2026-06-25 | Jimenez Freddy A. | Grant / award (derivative) | 93,000 | $0.00 | 93,000 |
| 2026-06-25 | Lawver Teri L | Grant / award (derivative) | 90,000 | $0.00 | 90,000 |
| 2026-01-02 | Martin Samuel Bates | Option exercise (derivative) | 4,817 | $0.00 | 58,815 |
| 2026-01-02 | Martin Samuel Bates | Option exercise | 4,817 | $10.38 | 32,942 |
| 2025-12-15 | PEPIN RONALD | Option exercise (derivative) | 11,000 | $0.00 | 0 |
| 2025-12-15 | PEPIN RONALD | Option exercise (derivative) | 8,333 | $0.00 | 5,000 |
| 2025-12-15 | PEPIN RONALD | Option exercise | 11,000 | $2.78 | 20,097 |
| 2025-12-15 | PEPIN RONALD | Option exercise | 8,333 | $9.02 | 9,097 |
| 2025-12-04 | Jimenez Freddy A. | Open-market sale | 4,166 | $29.09 | 30,796 |
| 2025-11-13 | Wright Richard M. | Option exercise (derivative) | 15,750 | $0.00 | 7,875 |
| 2025-11-13 | Wright Richard M. | Option exercise (derivative) | 6,876 | $0.00 | 0 |
| 2025-11-13 | Wright Richard M. | Open-market sale | 49,298 | $24.00 | 20,833 |
| 2025-11-13 | Wright Richard M. | Option exercise | 15,750 | $22.48 | 70,131 |
| 2025-11-13 | Wright Richard M. | Option exercise | 26,672 | $10.38 | 54,381 |
| 2025-11-13 | Wright Richard M. | Option exercise | 6,876 | $9.02 | 27,709 |
| 2025-11-10 | Lawver Teri L | Grant / award (derivative) | 100,000 | $0.00 | 100,000 |
| 2025-08-13 | Jimenez Freddy A. | Open-market sale | 430 | $25.41 | 34,962 |
| 2025-08-13 | Jimenez Freddy A. | Open-market sale | 341 | $23.95 | 35,392 |
| 2025-06-05 | MARINO JAMES J | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2025-06-05 | Brownlie Keith L | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2025-06-05 | Cohen Cheryl | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2025-06-05 | CONRAD HERBERT J | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2025-06-05 | PENNER HARRY JR | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2025-06-05 | NEIL GARRY ARTHUR | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.