Security key
37148K209
- Type / Class
- Equity / COMMON STOCK
- Shares outstanding
- 6,762,613
- Total 13F shares
- 4,312,052
- Share change
- +531,035
- Total reported value
- $24,490,431
- Price per share
- $5.68
- Number of holders
- 45
- Value change
- +$2,886,466
- Number of buys
- 21
- Number of sells
- 15
Report period
Q4 2025
Institutions
45
Top holders
10
GBIO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
Broader feeds
Reporting periods
Holder history for CUSIP 37148K209
Recent filing periods:
Ownership snapshot
Top shareholders of GBIO - Generation Bio Co. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
—
13D/G signal
—
Evidence rows
0
Latest as of
—
No top shareholder records were found across 13F, 13D/G, and Forms 3/4/5 for this issuer.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
45
Shares
4,312,052
Rows loaded
45
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. An asterisk next to the price means the price is likely invalid.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
35
Q4 2025 holders
45
Holder diff
10
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend