CLDX Institutional Ownership & Shareholders
CELLDEX THERAPEUTICS INC (CLDX) is currently held by 245 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $3.14B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Wellington Management Group Llp is currently the largest disclosed institutional shareholder of CLDX tracked by InsiderSet, reporting ownership valued at approximately $355.12M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $277.15M, representing an estimated loss of -21.96% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed CLDX value among the investors covered in this analysis. Major shareholders include Wellington Management Group Llp, Blackrock, Inc., Kynam Capital Management, Lp, and several other long-term asset managers with concentrated positions in CELLDEX THERAPEUTICS INC (CLDX).
This page ranks the largest institutional CLDX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
245
Total Reported Value
$3.14B
Largest Holder
Wellington Management Group Llp
Largest Position
$355.12M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
69
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Wellington Management Group Llp | 0.06% | 9,543,671 | $355,119,999 | $277,148,206 | -$77,971,793 | -21.96% | |
| Blackrock, Inc. | 0.00% | 7,002,530 | $260,564,141 | $203,353,471 | -$57,210,670 | -21.96% | |
| Kynam Capital Management, Lp | 10.95% | 5,322,908 | $198,065,407 | $154,577,248 | -$43,488,159 | -21.96% | |
| Price T Rowe Associates Inc | 0.02% | 4,685,223 | $174,338,000 | $136,058,876 | -$38,279,124 | -21.96% | |
| State Street Corp | 0.00% | 3,900,427 | $145,134,889 | $113,268,400 | -$31,866,489 | -21.96% | |
| Fmr Llc | 0.01% | 3,722,888 | $138,528,663 | $108,112,668 | -$30,415,995 | -21.96% | |
| Vanguard Capital Management Llc | 0.00% | 3,464,831 | $128,926,362 | $100,618,692 | -$28,307,670 | -21.96% | |
| Deep Track Capital, Lp | 1.61% | 2,939,151 | $109,365,809 | $85,352,945 | -$24,012,864 | -21.96% | |
| Logos Global Management Lp | 3.36% | 2,100,000 | $78,141,000 | $60,984,000 | -$17,157,000 | -21.96% | |
| Geode Capital Management, Llc | 0.00% | 2,022,226 | $75,262,712 | $58,725,443 | -$16,537,269 | -21.97% | |
| Eversept Partners, Lp | 3.62% | 1,785,941 | $66,454,865 | $51,863,727 | -$14,591,138 | -21.96% | |
| Goldman Sachs Group Inc | 0.01% | 1,615,343 | $60,106,913 | $46,909,561 | -$13,197,352 | -21.96% | |
| Commodore Capital Lp | 2.99% | 1,350,000 | $50,233,500 | $39,204,000 | -$11,029,500 | -21.96% | |
| Bellevue Group Ag | 0.94% | 1,200,000 | $44,652,000 | $34,848,000 | -$9,804,000 | -21.96% | |
| Baker Bros. Advisors Lp | 0.22% | 1,182,611 | $44,004,955 | $34,343,023 | -$9,661,932 | -21.96% | |
| Millennium Management Llc | 0.03% | 1,170,787 | $43,564,984 | $33,999,654 | -$9,565,330 | -21.96% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,073,985 | $39,964,295 | $31,188,524 | -$8,775,771 | -21.96% | |
| American Century Companies Inc | 0.02% | 1,042,395 | $38,787,594 | $30,271,151 | -$8,516,443 | -21.96% | |
| Eventide Asset Management, Llc | 0.52% | 1,037,000 | $38,586,770 | $30,114,480 | -$8,472,290 | -21.96% | |
| Novo Holdings A/S | 2.21% | 1,025,000 | $38,140,250 | $29,766,000 | -$8,374,250 | -21.96% | |
| Elmind Capital, Lp | 9.25% | 990,000 | $36,837,900 | $28,749,600 | -$8,088,300 | -21.96% | |
| Driehaus Capital Management Llc | 0.21% | 989,442 | $36,817,137 | $28,733,396 | -$8,083,741 | -21.96% | |
| Fisher Asset Management, Llc | 0.01% | 985,677 | $36,677,040 | $28,624,060 | -$8,052,980 | -21.96% | |
| Pictet Asset Management Holding Sa | 0.03% | 917,408 | $34,136,752 | $26,641,528 | -$7,495,224 | -21.96% | |
| Foresite Capital Management Vi Llc | 5.09% | 879,713 | $32,734,121 | $25,546,866 | -$7,187,255 | -21.96% | |
| Vanguard Portfolio Management Llc | 0.00% | 863,536 | $32,132,175 | $25,077,085 | -$7,055,090 | -21.96% | |
| Northern Trust Corp | 0.00% | 719,647 | $26,778,065 | $20,898,549 | -$5,879,516 | -21.96% | |
| Woodline Partners Lp | 0.08% | 700,830 | $26,077,884 | $20,352,103 | -$5,725,781 | -21.96% | |
| Affinity Asset Advisors, Llc | 1.27% | 700,000 | $26,047,000 | $20,328,000 | -$5,719,000 | -21.96% | |
| Rock Springs Capital Management Lp | 1.27% | 699,146 | $26,015,223 | $20,303,200 | -$5,712,023 | -21.96% | |
| Two Sigma Investments, Lp | 0.02% | 661,235 | $24,604,554 | $19,202,264 | -$5,402,290 | -21.96% | |
| Charles Schwab Investment Management Inc | 0.00% | 655,954 | $24,408,048 | $19,048,904 | -$5,359,144 | -21.96% | |
| Algert Global Llc | 0.29% | 647,836 | $24,105,978 | $18,813,157 | -$5,292,821 | -21.96% | |
| Adar1 Capital Management, Llc | 1.08% | 619,542 | $23,053,158 | $17,991,500 | -$5,061,658 | -21.96% | |
| Bank Of America Corp | 0.00% | 607,195 | $22,593,726 | $17,632,943 | -$4,960,783 | -21.96% | |
| Panagora Asset Management Inc | 0.07% | 572,538 | $21,304,139 | $16,626,504 | -$4,677,635 | -21.96% | |
| Nuveen, Llc | 0.01% | 568,460 | $21,152,396 | $16,508,078 | -$4,644,318 | -21.96% | |
| Vanguard Fiduciary Trust Co | 0.00% | 552,973 | $20,576,125 | $16,058,336 | -$4,517,789 | -21.96% | |
| 5Am Venture Management, Llc | 6.43% | 497,270 | $18,503,417 | $14,440,721 | -$4,062,696 | -21.96% | |
| Federated Hermes, Inc. | 0.03% | 492,893 | $18,340,549 | $14,313,613 | -$4,026,936 | -21.96% | |
| Ubs Group Ag | 0.00% | 481,997 | $17,935,109 | $13,997,193 | -$3,937,916 | -21.96% | |
| Candriam S.C.A. | 0.08% | 481,125 | $17,885,437 | $13,971,870 | -$3,913,567 | -21.88% | |
| Ikarian Capital, Llc | 2.91% | 478,500 | $17,804,985 | $13,895,640 | -$3,909,345 | -21.96% | |
| Braidwell Lp | 0.60% | 436,646 | $16,247,598 | $12,680,200 | -$3,567,398 | -21.96% | |
| Redmile Group, Llc | 1.08% | 433,921 | $16,146,200 | $12,601,066 | -$3,545,134 | -21.96% | |
| Citigroup Inc | 0.01% | 404,703 | $15,058,998 | $11,752,575 | -$3,306,423 | -21.96% | |
| Palo Alto Investors Lp | 2.06% | 399,856 | $14,878,642 | $11,611,818 | -$3,266,824 | -21.96% | |
| Assenagon Asset Management S.A. | 0.01% | 444,922 | $14,419,922 | $12,920,535 | -$1,499,387 | -10.40% | |
| Pfm Health Sciences, Lp | 1.11% | 342,751 | $12,753,765 | $9,953,489 | -$2,800,276 | -21.96% | |
| Kennedy Capital Management Llc | 0.23% | 342,328 | $12,738,025 | $9,941,205 | -$2,796,820 | -21.96% |
Frequently asked questions about CLDX
Who are the largest institutional holders of CLDX?
The largest institutional holders of CLDX reported in the latest SEC Form 13F filings include Wellington Management Group Llp, Blackrock, Inc., Kynam Capital Management, Lp, Price T Rowe Associates Inc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported CLDX position.
What is CLDX institutional ownership?
This page tracks CLDX positions reported by institutional investment managers through SEC Form 13F. CELLDEX THERAPEUTICS INC (CLDX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own CLDX?
InsiderSet currently tracks 245 institutional managers reporting CLDX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of CLDX shareholders.
How much CLDX stock do institutions own?
Institutional investment managers disclosed approximately $3.14B in CLDX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was CLDX institutional ownership last updated?
The latest CLDX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional CLDX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its CLDX position after the reporting date.
Are institutions buying or selling CLDX?
Institutional buying and selling can be analyzed by comparing CLDX positions across consecutive 13F reporting periods. InsiderSet's CLDX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View CLDX ownership changes.
How has CLDX institutional ownership changed over time?
InsiderSet tracks CLDX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.