Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in CLDX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | WELLINGTON MANAGEMENT GROUP LLP | 9.5M | $355.1M | +11.5% | 14.343% | 0.06% |
| 2 | BlackRock, Inc. | 7.0M | $260.6M | +30.4% | 10.524% | 0.00% |
| 3 | Kynam Capital Management, LP | 5.3M | $198.1M | -8.9% | 8.000% | 10.95% |
| 4 | STATE STREET CORP | 3.9M | $145.1M | +39.1% | 5.862% | 0.00% |
| 5 | FMR LLC | 3.7M | $138.5M | -0.7% | 5.595% | 0.01% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 3.5M | $128.9M | +17.0% | 5.207% | 0.00% |
| 7 | Deep Track Capital, LP | 2.9M | $109.4M | +128.9% | 4.417% | 1.59% |
| 8 | Logos Global Management LP | 2.1M | $78.1M | +366.7% | 3.156% | 3.36% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 2.0M | $75.3M | +19.8% | 3.039% | 0.00% |
| 10 | Eversept Partners, LP | 1.8M | $66.5M | -0.1% | 2.684% | 3.45% |
| 11 | GOLDMAN SACHS GROUP INC | 1.6M | $60.1M | +63.4% | 2.428% | 0.01% |
| 12 | Commodore Capital LP | 1.4M | $50.2M | -49.9% | 2.029% | 2.99% |
| 13 | Bellevue Group AG | 1.2M | $44.7M | 0.0% | 1.803% | 0.94% |
| 14 | BAKER BROS. ADVISORS LP | 1.2M | $44.0M | +77.7% | 1.777% | 0.22% |
| 15 | MILLENNIUM MANAGEMENT LLC | 1.2M | $43.6M | -6.6% | 1.760% | 0.02% |
| 16 | DIMENSIONAL FUND ADVISORS LP | 1.1M | $40.0M | +1.4% | 1.614% | 0.01% |
| 17 | AMERICAN CENTURY COMPANIES INC | 1.0M | $38.8M | +21.7% | 1.567% | 0.02% |
| 18 | EVENTIDE ASSET MANAGEMENT, LLC | 1.0M | $38.6M | 0.0% | 1.558% | 0.52% |
| 19 | Novo Holdings A/S | 1.0M | $38.1M | -14.6% | 1.540% | 2.21% |
| 20 | Elmind Capital, LP | 990K | $36.8M | +14.4% | 1.488% | 9.25% |
| 21 | DRIEHAUS CAPITAL MANAGEMENT LLC | 989K | $36.8M | — | 1.487% | 0.21% |
| 22 | Fisher Asset Management, LLC | 986K | $36.7M | -2.8% | 1.481% | 0.01% |
| 23 | Pictet Asset Management Holding SA | 917K | $34.1M | -0.7% | 1.379% | 0.03% |
| 24 | Foresite Capital Management VI LLC | 880K | $32.7M | +178.5% | 1.322% | 5.09% |
| 25 | VANGUARD PORTFOLIO MANAGEMENT LLC | 864K | $32.1M | +37.2% | 1.298% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in CLDX — a direct measure of their conviction.
Filings activity in CLDX during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 258 | +12% | 128.85% | 0.85 pp | $3.01B | +34% |
| Q1 2026 | 231 | +24% | 129.70% | 0.49 pp | $2.25B | +17% |
| Q4 2025 | 187 | +2.7% | 130.19% | +4.12 pp | $1.93B | +9.0% |
| Q3 2025 | 182 | +1.1% | 126.07% | 3.55 pp | $1.77B | +27% |
| Q2 2025 | 180 | +5.3% | 129.62% | +0.19 pp | $1.39B | +11% |
| Q1 2025 | 171 | 2.8% | 129.43% | 1.42 pp | $1.25B | 27% |
| Q4 2024 | 176 | 0.6% | 130.85% | +3.26 pp | $1.72B | 24% |
| Q3 2024 | 177 | — | 127.59% | — | $2.27B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying CLDX stock.
Based on Q2 2026 13F filings, institutional ownership of Celldex Therapeutics, Inc. stands at 128.8%, held across 258 reporting institutions.
WELLINGTON MANAGEMENT GROUP LLP is the largest reported institutional holder of CLDX, with approximately 9,543,671 shares worth $0.36B as of Q2 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of CLDX, including MILLENNIUM MANAGEMENT LLC, Fisher Asset Management, LLC.
Our composite Smart Money Score for CLDX is 60 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
45 institutions opened new positions in CLDX during Q2 2026, while 20 fully exited. 174 added to existing positions and 28 trimmed.
CLDX institutional ownership fell by 0.85 percentage points quarter-over-quarter, with a net change of +27 holders.
The top 10 institutions account for 51.7% of all reported 13F value in CLDX, and the top 25 account for 71.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Celldex Therapeutics, Inc. (CLDX) Institutional Ownership