CELLDEX THERAPEUTICS INC (CLDX) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $2.23B 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 $271.54M in its March 31, 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 $281.90M, representing an estimated gain of +3.81% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 55% of the total disclosed CLDX value among the investors covered in this analysis. Major shareholders include Wellington Management Group Llp, Kynam Capital Management, Lp, Blackrock, Inc., 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
222
Total Reported Value
$2.23B
Largest Holder
Wellington Management Group Llp
Largest Position
$271.54M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
173
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 | 0.05% | 8,560,476 | $271,538,300 | $281,896,475 | +$10,358,175 | +3.81% | |
| Kynam Capital Management, Lp | 11.76% | 5,840,567 | $185,262,785 | $192,329,871 | +$7,067,086 | +3.81% | |
| Blackrock, Inc. | 0.00% | 5,369,885 | $170,332,752 | $176,830,313 | +$6,497,561 | +3.81% | |
| Fmr Llc | 0.01% | 3,749,048 | $118,919,804 | $123,456,151 | +$4,536,347 | +3.81% | |
| Point72 Asset Management, L.P. | 0.18% | 3,229,939 | $102,453,665 | $106,361,891 | +$3,908,226 | +3.81% | |
| Vanguard Capital Management Llc | 0.00% | 2,960,895 | $93,919,589 | $97,502,272 | +$3,582,683 | +3.81% | |
| State Street Corp | 0.00% | 2,804,168 | $88,948,209 | $92,341,252 | +$3,393,043 | +3.81% | |
| Commodore Capital Lp | 4.95% | 2,696,616 | $85,536,660 | $88,799,565 | +$3,262,905 | +3.81% | |
| Eversept Partners, Lp | 3.74% | 1,788,016 | $56,715,868 | $58,879,367 | +$2,163,499 | +3.81% | |
| Geode Capital Management, Llc | 0.00% | 1,688,074 | $53,556,480 | $55,588,277 | +$2,031,797 | +3.79% | |
| Braidwell Lp | 1.43% | 1,356,082 | $43,014,921 | $44,655,780 | +$1,640,859 | +3.81% | |
| Deep Track Capital, Lp | 0.84% | 1,283,979 | $40,727,814 | $42,281,428 | +$1,553,614 | +3.81% | |
| Millennium Management Llc | 0.03% | 1,253,532 | $39,762,035 | $41,278,809 | +$1,516,774 | +3.81% | |
| Vestal Point Capital, Lp | 1.09% | 1,224,165 | $38,830,514 | $40,311,753 | +$1,481,239 | +3.81% | |
| Bellevue Group Ag | 0.91% | 1,200,000 | $38,064,000 | $39,516,000 | +$1,452,000 | +3.81% | |
| Novo Holdings A/S | 3.08% | 1,200,000 | $38,064,000 | $39,516,000 | +$1,452,000 | +3.81% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,059,534 | $33,595,626 | $34,890,455 | +$1,294,829 | +3.85% | |
| Eventide Asset Management, Llc | 0.54% | 1,037,000 | $32,893,640 | $34,148,410 | +$1,254,770 | +3.81% | |
| Fisher Asset Management, Llc | 0.01% | 1,013,648 | $32,152,913 | $33,379,429 | +$1,226,516 | +3.81% | |
| Goldman Sachs Group Inc | 0.00% | 988,416 | $31,352,555 | $32,548,539 | +$1,195,984 | +3.81% | |
| Pictet Asset Management Holding Sa | 0.03% | 923,696 | $29,299,637 | $30,417,309 | +$1,117,672 | +3.81% | |
| Elmind Capital, Lp | 7.79% | 865,000 | $27,437,800 | $28,484,450 | +$1,046,650 | +3.81% | |
| American Century Companies Inc | 0.01% | 856,310 | $27,162,211 | $28,198,288 | +$1,036,077 | +3.81% | |
| Bank Of America Corp | 0.00% | 708,647 | $22,478,282 | $23,335,746 | +$857,464 | +3.81% | |
| Baker Bros. Advisors Lp | 0.12% | 665,370 | $21,105,536 | $21,910,634 | +$805,098 | +3.81% | |
| Rock Springs Capital Management Lp | 1.22% | 650,270 | $20,626,564 | $21,413,391 | +$786,827 | +3.81% | |
| Vanguard Portfolio Management Llc | 0.00% | 629,252 | $19,959,873 | $20,721,268 | +$761,395 | +3.81% | |
| Northern Trust Corp | 0.00% | 577,267 | $18,310,909 | $19,009,402 | +$698,493 | +3.81% | |
| Charles Schwab Investment Management Inc | 0.00% | 545,486 | $17,302,816 | $17,962,854 | +$660,038 | +3.81% | |
| Woodline Partners Lp | 0.06% | 500,127 | $15,864,028 | $16,469,182 | +$605,154 | +3.81% | |
| Affinity Asset Advisors, Llc | 0.93% | 500,000 | $15,860,000 | $16,465,000 | +$605,000 | +3.81% | |
| 5Am Venture Management, Llc | 4.38% | 497,270 | $15,773,404 | $16,375,101 | +$601,697 | +3.81% | |
| Ikarian Capital, Llc | 2.09% | 461,247 | $14,630,755 | $15,188,864 | +$558,109 | +3.81% | |
| Logos Global Management Lp | 0.74% | 450,000 | $14,274,000 | $14,818,500 | +$544,500 | +3.81% | |
| Vanguard Fiduciary Trust Co | 0.00% | 429,597 | $13,626,817 | $14,146,629 | +$519,812 | +3.81% | |
| Adar1 Capital Management, Llc | 0.82% | 427,816 | $13,570,324 | $14,087,981 | +$517,657 | +3.81% | |
| Tsp Capital Management Group, Llc | 2.90% | 375,127 | $11,899,031 | $12,352,932 | +$453,901 | +3.81% | |
| Kennedy Capital Management Llc | 0.24% | 352,302 | $11,175,019 | $11,601,305 | +$426,286 | +3.81% | |
| Rosalind Advisors, Inc. | 4.29% | 330,000 | $10,467,600 | $10,866,900 | +$399,300 | +3.81% | |
| Pfm Health Sciences, Lp | 1.08% | 324,957 | $10,307,636 | $10,700,834 | +$393,198 | +3.81% | |
| Foresite Capital Management Vi Llc | 2.18% | 315,913 | $10,020,760 | $10,403,015 | +$382,255 | +3.81% | |
| Tetragon Partners Gp Ltd | 1.95% | 312,316 | $9,906,664 | $10,284,566 | +$377,902 | +3.81% | |
| Ubs Group Ag | 0.00% | 296,970 | $9,419,888 | $9,779,222 | +$359,334 | +3.81% | |
| Palo Alto Investors Lp | 1.44% | 296,408 | $9,402,062 | $9,760,715 | +$358,653 | +3.81% | |
| Candriam S.C.A. | 0.05% | 278,888 | $8,846,327 | $9,183,782 | +$337,455 | +3.81% | |
| Segall Bryant & Hamill, Llc | 0.14% | 266,670 | $8,328,104 | $8,781,443 | +$453,339 | +5.44% | |
| Redmile Group, Llc | 0.55% | 261,508 | $8,295,034 | $8,611,458 | +$316,424 | +3.81% | |
| Stempoint Capital Lp | 1.57% | 254,267 | $8,065,349 | $8,373,012 | +$307,663 | +3.81% | |
| Sphera Funds Management Ltd. | 1.33% | 243,575 | $7,726,199 | $8,020,925 | +$294,726 | +3.81% | |
| Summittx Capital, L.P. | 0.24% | 236,637 | $7,506,126 | $7,792,456 | +$286,330 | +3.81% |
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.