CELLDEX THERAPEUTICS INC (CLDX) Institutional Shareholders
CELLDEX THERAPEUTICS INC (CLDX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $3.00B in CLDX holdings during the latest filing period.
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 $400.07M, representing an estimated gain of +12.66% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% 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
246
Total Reported Value
$3.00B
Largest Holder
Wellington Management Group Llp
Largest Position
$355.12M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
82
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 | $400,070,688 | +$44,950,689 | +12.66% | |
| Blackrock, Inc. | 0.00% | 7,002,530 | $260,564,141 | $293,546,058 | +$32,981,917 | +12.66% | |
| Kynam Capital Management, Lp | 10.95% | 5,322,908 | $198,065,407 | $223,136,303 | +$25,070,896 | +12.66% | |
| State Street Corp | 0.00% | 3,900,427 | $145,134,889 | $163,505,900 | +$18,371,011 | +12.66% | |
| Fmr Llc | 0.01% | 3,722,888 | $138,528,663 | $156,063,465 | +$17,534,802 | +12.66% | |
| Vanguard Capital Management Llc | 0.00% | 3,464,831 | $128,926,362 | $145,245,716 | +$16,319,354 | +12.66% | |
| Deep Track Capital, Lp | 1.61% | 2,939,151 | $109,365,809 | $123,209,210 | +$13,843,401 | +12.66% | |
| Logos Global Management Lp | 3.36% | 2,100,000 | $78,141,000 | $88,032,000 | +$9,891,000 | +12.66% | |
| Geode Capital Management, Llc | 0.00% | 2,022,226 | $75,262,712 | $84,771,714 | +$9,509,002 | +12.63% | |
| Eversept Partners, Lp | 3.62% | 1,785,941 | $66,454,865 | $74,866,647 | +$8,411,782 | +12.66% | |
| Goldman Sachs Group Inc | 0.01% | 1,615,343 | $60,106,913 | $67,715,179 | +$7,608,266 | +12.66% | |
| Commodore Capital Lp | 2.99% | 1,350,000 | $50,233,500 | $56,592,000 | +$6,358,500 | +12.66% | |
| Bellevue Group Ag | 0.94% | 1,200,000 | $44,652,000 | $50,304,000 | +$5,652,000 | +12.66% | |
| Baker Bros. Advisors Lp | 0.22% | 1,182,611 | $44,004,955 | $49,575,053 | +$5,570,098 | +12.66% | |
| Millennium Management Llc | 0.03% | 1,170,787 | $43,564,984 | $49,079,391 | +$5,514,407 | +12.66% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,073,985 | $39,964,295 | $45,021,451 | +$5,057,156 | +12.65% | |
| American Century Companies Inc | 0.02% | 1,042,395 | $38,787,594 | $43,697,198 | +$4,909,604 | +12.66% | |
| Eventide Asset Management, Llc | 0.52% | 1,037,000 | $38,586,770 | $43,471,040 | +$4,884,270 | +12.66% | |
| Novo Holdings A/S | 2.21% | 1,025,000 | $38,140,250 | $42,968,000 | +$4,827,750 | +12.66% | |
| Elmind Capital, Lp | 9.25% | 990,000 | $36,837,900 | $41,500,800 | +$4,662,900 | +12.66% | |
| Driehaus Capital Management Llc | 0.21% | 989,442 | $36,817,137 | $41,477,409 | +$4,660,272 | +12.66% | |
| Fisher Asset Management, Llc | 0.01% | 985,677 | $36,677,040 | $41,319,580 | +$4,642,540 | +12.66% | |
| Pictet Asset Management Holding Sa | 0.03% | 917,408 | $34,136,752 | $38,457,743 | +$4,320,991 | +12.66% | |
| Foresite Capital Management Vi Llc | 5.09% | 879,713 | $32,734,121 | $36,877,569 | +$4,143,448 | +12.66% | |
| Vanguard Portfolio Management Llc | 0.00% | 863,536 | $32,132,175 | $36,199,429 | +$4,067,254 | +12.66% | |
| Assenagon Asset Management S.A. | 0.04% | 788,696 | $29,347,378 | $33,062,136 | +$3,714,758 | +12.66% | |
| Northern Trust Corp | 0.00% | 719,647 | $26,778,065 | $30,167,602 | +$3,389,537 | +12.66% | |
| Woodline Partners Lp | 0.08% | 700,830 | $26,077,884 | $29,378,794 | +$3,300,910 | +12.66% | |
| Affinity Asset Advisors, Llc | 1.27% | 700,000 | $26,047,000 | $29,344,000 | +$3,297,000 | +12.66% | |
| Rock Springs Capital Management Lp | 1.27% | 699,146 | $26,015,223 | $29,308,200 | +$3,292,977 | +12.66% | |
| Two Sigma Investments, Lp | 0.02% | 661,235 | $24,604,554 | $27,718,971 | +$3,114,417 | +12.66% | |
| Charles Schwab Investment Management Inc | 0.00% | 655,954 | $24,408,048 | $27,497,592 | +$3,089,544 | +12.66% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 655,954 | $24,408,048 | $27,497,592 | +$3,089,544 | +12.66% | |
| Algert Global Llc | 0.29% | 647,836 | $24,105,978 | $27,157,285 | +$3,051,307 | +12.66% | |
| Adar1 Capital Management, Llc | 1.08% | 619,542 | $23,053,158 | $25,971,201 | +$2,918,043 | +12.66% | |
| Bank Of America Corp | 0.00% | 607,195 | $22,593,726 | $25,453,614 | +$2,859,888 | +12.66% | |
| Panagora Asset Management Inc | 0.07% | 572,538 | $21,304,139 | $24,000,793 | +$2,696,654 | +12.66% | |
| Nuveen, Llc | 0.01% | 568,460 | $21,152,396 | $23,829,843 | +$2,677,447 | +12.66% | |
| Vanguard Fiduciary Trust Co | 0.00% | 552,973 | $20,576,125 | $23,180,628 | +$2,604,503 | +12.66% | |
| 5Am Venture Management, Llc | 6.43% | 497,270 | $18,503,417 | $20,845,558 | +$2,342,141 | +12.66% | |
| Federated Hermes, Inc. | 0.03% | 492,893 | $18,340,549 | $20,662,075 | +$2,321,526 | +12.66% | |
| Ubs Group Ag | 0.00% | 481,997 | $17,935,109 | $20,205,314 | +$2,270,205 | +12.66% | |
| Candriam S.C.A. | 0.08% | 481,125 | $17,885,437 | $20,168,760 | +$2,283,323 | +12.77% | |
| Ikarian Capital, Llc | 2.91% | 478,500 | $17,804,985 | $20,058,720 | +$2,253,735 | +12.66% | |
| Braidwell Lp | 0.60% | 436,646 | $16,247,598 | $18,304,200 | +$2,056,602 | +12.66% | |
| Redmile Group, Llc | 1.08% | 433,921 | $16,146,200 | $18,189,968 | +$2,043,768 | +12.66% | |
| Citigroup Inc | 0.01% | 404,703 | $15,058,998 | $16,965,150 | +$1,906,152 | +12.66% | |
| Palo Alto Investors Lp | 2.06% | 399,856 | $14,878,642 | $16,761,964 | +$1,883,322 | +12.66% | |
| Tsp Capital Management Group, Llc | 3.30% | 371,127 | $13,809,638 | $15,557,644 | +$1,748,006 | +12.66% | |
| Pfm Health Sciences, Lp | 1.11% | 342,751 | $12,753,765 | $14,368,122 | +$1,614,357 | +12.66% |
Frequently asked questions about CLDX
Who owns the most CLDX stock?
The largest holders of CLDX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CELLDEX THERAPEUTICS INC (CLDX).
Is CLDX widely held by superinvestors?
Many widely followed stocks like CLDX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CLDX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.