Celldex Therapeutics, Inc.

CLDX

Exchange: Nasdaq
Industry: In Vitro & In Vivo Diagnostic Substances
SEC CIK: 0000744218

SEC filings (opens in a new tab)

No open-market purchases or sales by Celldex Therapeutics, Inc. insiders were filed in the last 90 days; 253 institutions reported holding it in 13F filings for Q2 2026, worth $3.16B in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Celldex Therapeutics, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of CLDX: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Of which not filed for Q4 2025	Q4 2025	Change
Holders	184	2	187	+5
Shares	70.7M	151.8K	73.0M	+2.45M (+3.5%)
Value	$1.83B	$3.93M	$1.99B	+$167.8M (+9.2%)

2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (25)

Institutions that held Celldex Therapeutics, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to CLDX in Q4 2025
Institution	Shares	Value	% of portfolio
Elmind Capital, LP	865,000	$23.5M	6.93%
Logos Global Management LP	350,000	$9.51M	0.63%
GordonMD Global Investments LP	170,307	$4.63M	3.32%
PFM Health Sciences, LP	133,161	$3.62M	0.37%
Connor, Clark & Lunn Investment Management Ltd.	118,205	$3.21M	0.01%
Superstring Capital Management LP	88,308	$2.40M	1.28%
Quantinno Capital Management LP	23,586	$640.6K	0.00%
PSP Research LLC	20,368	$553.2K	0.48%
SBI Okasan Asset Management Co.Ltd.	16,400	$426.9K	0.02%
Marex Group plc	8,200	$222.7K	0.00%
Values First Advisors, Inc.	7,728	$209.9K	0.11%
Kestra Advisory Services, LLC	3,600	$97.8K	0.00%
Pinnacle Wealth Planning Services, Inc.	2,242	$60.9K	0.01%
Group One Trading, L.P.	748	$20.3K	0.00%
Clear Street Markets LLC	452	$12.3K	0.00%
Sound Income Strategies, LLC	344	$8.82K	0.00%
Los Angeles Capital Management LLC	262	$6.81K	0.00%
Quarry LP	180	$4.89K	0.00%
SRS Capital Advisors, Inc.	87	$2.36K	0.00%
Bare Financial Services, Inc	79	$2.15K	0.00%
Jones Financial Companies LLLP	59	$1.60K	0.00%
GHP Investment Advisors, Inc.	25	$679	0.00%
Basecamp Wealth Advisors LLC	24	$652	0.00%
Caitong International Asset Management Co., Ltd	22	$598	0.00%
CWM Advisors, LLC	1	$27	0.00%

Sold out (20)

Institutions that held Celldex Therapeutics, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of CLDX in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Voloridge Investment Management, LLC	100,308	$2.59M
Verition Fund Management LLC	55,140	$1.43M
Jefferies Financial Group Inc.	50,000	$1.29M
Y-Intercept (Hong Kong) Ltd	48,906	$1.27M
Schroder Investment Management Group	48,099	$1.26M
Readystate Asset Management LP	46,520	$1.20M
Tudor Investment Corp Et Al	31,618	$818.0K
Susquehanna International Group, LLP	27,367	$708.0K
Guggenheim Capital LLC	22,721	$587.8K
Gsa Capital Partners LLP	18,308	$474.0K
Brevan Howard Capital Management LP	14,362	$371.5K
Balyasny Asset Management LLC	11,632	$300.9K
Prudential Financial Inc	8,809	$227.9K
HSBC Holdings PLC	8,145	$211.1K
Advisory Services Network, LLC	5,390	$139.4K
STRS Ohio	2,900	$75.0K
Simplex Trading, LLC	1,136	$29.0K
Aster Capital Management (DIFC) Ltd	1,014	$26.2K
Halbert Hargrove Global Advisors, LLC	78	$2.02K
FNY Investment Advisers, LLC	14	$0

Not filed for Q4 2025 yet (2)

Institutions that held Celldex Therapeutics, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CLDX in Q3 2025 that haven't filed for Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
AXA Investment Managers S.A.	121,326	$3.14M
Cubist Systematic Strategies, LLC	30,446	$787.6K