Who owns CLDX (CLDX)
Which tracked institutional funds hold CLDX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CLDX company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on CLDX is one-sided between 2025-Q4 and 2026-Q1: 89 added or opened and 23 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
CLDX’s largest tracked holder by dollar value, WELLINGTON MANAGEMENT GROUP LLP, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CLDX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 229 tracked filers holding CLDX, 128 increased or opened the position and 75 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in CLDX between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 27
- VANGUARD CAPITAL MANAGEMENT LLC$94M
- VANGUARD PORTFOLIO MANAGEMENT LLC$20M
- Ikarian Capital, LLC$15M
- VANGUARD FIDUCIARY TRUST CO$14M
- KENNEDY CAPITAL MANAGEMENT LLC$11M
- Rosalind Advisors, Inc.$10M
Full exits 3
- VANGUARD GROUP INC$96M
- Polar Capital Holdings Plc$27M
- RENAISSANCE TECHNOLOGIES LLC$3M
Largest adds
- Point72 Asset Management, L.P.$55M
- WELLINGTON MANAGEMENT GROUP LLP$52M
- Kynam Capital Management, LP$24M
- BlackRock, Inc.$22M
- Eversept Partners, LP$18M
- DIMENSIONAL FUND ADVISORS LP$16M
Largest trims
- Bellevue Group AG$60M
- FMR LLC$14M
- EVENTIDE ASSET MANAGEMENT, LLC$12M
- Deep Track Capital, LP$11M
- BRAIDWELL LP$7M
- BARCLAYS PLC$6M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP added | 8,555,968 | $271M | 11.3% | 2026-Q1 |
| Kynam Capital Management, LP trimmed | 5,840,567 | $185M | 7.7% | 2026-Q1 |
| BlackRock, Inc. trimmed | 5,369,885 | $170M | 7.1% | 2026-Q1 |
| FMR LLC trimmed | 3,747,750 | $119M | 4.9% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 3,229,939 | $102M | 4.3% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,960,895 | $94M | 3.9% | 2026-Q1 |
| STATE STREET CORP trimmed | 2,804,168 | $89M | 3.7% | 2026-Q1 |
| Commodore Capital LP added | 2,696,616 | $86M | 3.6% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,086,332 | $66M | 2.8% | 2026-Q1 |
| Eversept Partners, LP added | 1,788,016 | $57M | 2.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,688,074 | $54M | 2.2% | 2026-Q1 |
| BRAIDWELL LP trimmed | 1,356,082 | $43M | 1.8% | 2026-Q1 |
| Deep Track Capital, LP trimmed | 1,283,979 | $41M | 1.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,253,532 | $40M | 1.7% | 2026-Q1 |
| Vestal Point Capital, LP added | 1,224,165 | $39M | 1.6% | 2026-Q1 |
| NOVO HOLDINGS A/S | 1,200,000 | $38M | 1.6% | 2026-Q1 |
| Bellevue Group AG trimmed | 1,200,000 | $38M | 1.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,059,534 | $34M | 1.4% | 2026-Q1 |
| EVENTIDE ASSET MANAGEMENT, LLC trimmed | 1,037,000 | $33M | 1.4% | 2026-Q1 |
| Fisher Asset Management, LLC added | 1,013,648 | $32M | 1.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 988,416 | $31M | 1.3% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 923,696 | $29M | 1.2% | 2026-Q1 |
| Elmind Capital, LP | 865,000 | $27M | 1.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 856,310 | $27M | 1.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 708,647 | $22M | 0.9% | 2026-Q1 |
| BAKER BROS. ADVISORS LP | 665,370 | $21M | 0.9% | 2026-Q1 |
| Rock Springs Capital Management LP trimmed | 650,270 | $21M | 0.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 629,252 | $20M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP added | 577,267 | $18M | 0.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 545,486 | $17M | 0.7% | 2026-Q1 |
| Woodline Partners LP | 500,127 | $16M | 0.7% | 2026-Q1 |
| Affinity Asset Advisors, LLC added | 500,000 | $16M | 0.7% | 2026-Q1 |
| 5AM Venture Management, LLC | 497,270 | $16M | 0.7% | 2026-Q1 |
| Ikarian Capital, LLC added | 461,247 | $15M | 0.6% | 2026-Q1 |
| Logos Global Management LP added | 450,000 | $14M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 429,597 | $14M | 0.6% | 2026-Q1 |
| ADAR1 Capital Management, LLC trimmed | 427,816 | $14M | 0.6% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 352,302 | $11M | 0.5% | 2026-Q1 |
| Rosalind Advisors, Inc. new | 330,000 | $10M | 0.4% | 2026-Q1 |
| PFM Health Sciences, LP added | 324,957 | $10M | 0.4% | 2026-Q1 |
| Foresite Capital Management VI LLC new | 315,913 | $10M | 0.4% | 2026-Q1 |
| Tetragon Partners GP Ltd added | 312,316 | $10M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 296,970 | $9M | 0.4% | 2026-Q1 |
| Palo Alto Investors LP new | 296,408 | $9M | 0.4% | 2026-Q1 |
| Candriam S.C.A. trimmed | 278,888 | $9M | 0.4% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 266,670 | $8M | 0.3% | 2026-Q1 |
| Redmile Group, LLC trimmed | 261,508 | $8M | 0.3% | 2026-Q1 |
| STEMPOINT CAPITAL LP added | 254,267 | $8M | 0.3% | 2026-Q1 |
| SPHERA FUNDS MANAGEMENT LTD. added | 243,575 | $8M | 0.3% | 2026-Q1 |
| SummitTX Capital, L.P. added | 236,637 | $8M | 0.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 217,549 | $7M | 0.3% | 2026-Q1 |
| CITIGROUP INC added | 217,335 | $7M | 0.3% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 215,159 | $7M | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 201,949 | $6M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 200,612 | $6M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 190,399 | $6M | 0.3% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 184,104 | $6M | 0.2% | 2026-Q1 |
| SUPERSTRING CAPITAL MANAGEMENT LP added | 180,048 | $6M | 0.2% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC trimmed | 178,378 | $6M | 0.2% | 2026-Q1 |
| Mirador Capital Partners LP added | 178,053 | $6M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 175,788 | $6M | 0.2% | 2026-Q1 |
| GordonMD Global Investments LP | 170,307 | $5M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 164,778 | $5M | 0.2% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 146,525 | $5M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 143,037 | $5M | 0.2% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 142,327 | $5M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 137,015 | $4M | 0.2% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 134,945 | $4M | 0.2% | 2026-Q1 |
| Propel Bio Management, LLC trimmed | 131,364 | $4M | 0.2% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 122,404 | $4M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 120,807 | $4M | 0.2% | 2026-Q1 |
| Swiss National Bank | 117,900 | $4M | 0.2% | 2026-Q1 |
| PDT Partners, LLC | 97,822 | $3M | 0.1% | 2026-Q1 |
| Invesco Ltd. added | 93,684 | $3M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 90,321 | $3M | 0.1% | 2026-Q1 |
| HighVista Strategies LLC added | 89,397 | $3M | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 85,983 | $3M | 0.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 85,026 | $3M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 79,630 | $3M | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 77,772 | $2M | 0.1% | 2026-Q1 |
| TD Asset Management Inc added | 70,292 | $2M | 0.1% | 2026-Q1 |
| Birchview Capital, LP new | 70,095 | $2M | 0.1% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 70,053 | $2M | 0.1% | 2026-Q1 |
| Simplify Asset Management Inc. trimmed | 68,994 | $2M | 0.1% | 2026-Q1 |
| DAFNA Capital Management LLC | 68,518 | $2M | 0.1% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 68,470 | $2M | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 65,744 | $2M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 65,050 | $2M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 65,540 | $2M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 55,080 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 3,517,703 | $96M | 4.0% | 2025-Q4 stale |
| Polar Capital Holdings Plc trimmed | 1,008,163 | $27M | 1.1% | 2025-Q4 stale |
| TSP Capital Management Group, LLC added | 375,927 | $10M | 0.4% | 2025-Q3 stale |
| NATIXIS added | 232,188 | $4M | 0.2% | 2025-Q1 stale |
| AXA S.A. added | 185,100 | $4M | 0.2% | 2025-Q2 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 118,488 | $3M | 0.1% | 2025-Q4 stale |
| AXA Investment Managers S.A. new | 121,326 | $3M | 0.1% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 100,308 | $3M | 0.1% | 2025-Q3 stale |
| Schonfeld Strategic Advisors LLC trimmed | 118,775 | $2M | 0.1% | 2025-Q2 stale |
| Trexquant Investment LP added | 112,464 | $2M | 0.1% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.