Companies / Climb Bio, Inc.
Climb Bio, Inc.
Nasdaq: CLYMCIK 1768446WELLESLEY HILLS, MA
Financials
Ownership
57.4M shares outstanding · as of Jul 31, 2026
Ownership
| 10%+ / strategic | 4.65% | 2,671,480 |
| Institutions | 56.98% | 32,725,418 |
| Public float | 38.37% | 22,039,357 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 14
View all →| Insider | % of shares | Shares |
|---|---|---|
RA Capital Management, L.P.FormerDirector · 10% owner | 5.93% | 3,403,429 |
Thomas Stephen BasilFormerDirector | 0.27% | 154,657 |
ALTSCHULLER SusanChief Financial Officer | — | — |
Brennan AoifeCEOPresident and CEO · Director | — | — |
Drapkin Kimberlee CDirector | — | — |
Driscoll CindyFormerSenior Vice President, Finance | — | — |
Kolchinsky PeterFormerDirector · 10% owner | — | — |
RA Capital Healthcare Fund LPFormerDirector · 10% owner | — | — |
RA Capital Nexus Fund III, L.P.FormerDirector · 10% owner | — | — |
RA Capital Nexus Fund II, L.P.FormerDirector | — | — |
Institutional holders 68
View all →| Holder | Value | % of shares |
|---|---|---|
| $77.41M | 19.68% | |
| $30.71M | 4.10% | |
| $10.69M | 4.65% | |
| $9.14M | 2.32% | |
| $8.96M | 1.20% | |
| $8.74M | 2.22% | |
| $5.73M | 2.49% | |
| $5.36M | 2.33% | |
| $5.30M | 1.35% | |
| $5.20M | 2.26% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common Stock | $25.63M | +2.0M +504.89% | 2,354,872 4.10% of shares | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common Stock | $7.27M | +558K +432.79% | 686,772 1.20% of shares | medium |
| Q1 2026 as of | Millennium Management LLC 13F manager | Add | Common Stock | $6.71M | +980K +330.71% | 1,276,260 2.22% of shares | medium |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common Stock | $3.21M | +469K +154.30% | 773,123 1.35% of shares | low |
| Q1 2026 as of | Great Point Partners, LLC 13F manager | Add | Common Stock | $2.43M | +355K +36.20% | 1,334,130 2.32% of shares | low |
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Trim | Common Stock | $-1.75M | -256K -45.19% | 310,606 0.54% of shares | low |
| Q4 2025 as of | Cantor Fitzgerald, L. P. 13F manager | Exit | Common Stock | $-1.10M | -547K -100.00% | — | low |
| Q1 2026 as of | Renaissance Technologies LLC 13F manager | Trim | Common Stock | $-707.6K | -103K -32.22% | 217,300 0.38% of shares | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| MPM BioImpact LLC | Passive13G | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| CLYM | Common Stock | 28658R106 |