Third Harmonic BioTHRD
13F holders, Q4 2025 (December 31)4holders −14
0new positions
14sold out
$5.13avg. 13F price*
At the end of Q4 2025, 4 institutions reported holding Third Harmonic Bio Inc. (THRD) in their 13F filings, down 14 from Q3 2025. 0 opened new positions and 14 sold out. The largest holders were Rhumbline Advisers ($109K), GAMMA Investing LLC ($2K) and SBI Securities Co., Ltd. ($1).
- Company
- Third Harmonic Bio Inc.
- CUSIP
- 88427A107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 0 | $0 |
| Exits | 14 | $1.1M |
All 13F filers, Q3 2025 → Q4 2025: 4,309,200 shares sold, net −4,309,200 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 4 holders
| Rhumbline Advisers | 0.00% | Reduce -2.1% | 20,267 | $109K |
| GAMMA Investing LLC | 0.00% | No change | 458 | $2K |
| SBI Securities Co., Ltd. | 0.00% | No change | 20 | $1 |
| Caldwell Sutter Capital, Inc. | 0.00% | No change | 1,000 | $0 |
"% of holder's portfolio" is THRD's weight in each manager's 13F, not the share of Third Harmonic Bio Inc. the manager owns.