EcoR1 Capital, LLC: CG ONCOLOGY INC (CGON): Quarterly 13F Position History
As of Q1 2026, EcoR1 Capital, LLC reported 1,102,000 shares of CG ONCOLOGY INC (CGON), worth $74.6M and representing 3.2% of its 13F equity book. Quarter-over-quarter share count change: + 330,000 (+42.7%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 1,102,000Shares Held (Latest Filing)
- $74.6MReported Market Value (Latest Filing)
- 3.2%Portfolio Weight (% of 13F Equity Book)
- +330,000Quarter-over-Quarter Share Change
- +$42.5MQuarter-over-Quarter Value Change
- 1,102,000Peak Reported Shares (Historical)
Recent initiation: EcoR1 Capital, LLC first reported CGON on the Q4 2025 filing — fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,102,000 | +330,000 | +42.7% | $74.6M | 3.2% | $67.7 |
| Q4 2025 | 772,000 | — | — | $32.1M | 1.5% | $41.5 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did EcoR1 Capital, LLC first disclose a CGON position in 13F-HR filings?
EcoR1 Capital, LLC first reported CG ONCOLOGY INC (CGON) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was EcoR1 Capital, LLC's most recent quarter-over-quarter share-count change in CGON?
Between Q4 2025 and Q1 2026, EcoR1 Capital, LLC added 330,000 shares of CGON (+42.7%), bringing the total reported position to 1,102,000 shares at a market value of $74.6M.
Does the implied price-per-share represent EcoR1 Capital, LLC's cost basis in CGON?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.