Security key
37148K100
GENERATION BIO CO. - COMMON STOCK, $0.0001 PAR VALUE (GBIO)
CUSIP: 37148K100
Q4 2020 13F Holders as of 31 Dec 2020
- Security type / class
- Equity / COMMON STOCK, $0.0001 PAR VALUE
- Total 13F shares
- 31,971,964
- Total 13F value
- $906,479,426
- Share change
- +2,038,469
- SEC-reported price per share
- $28.35
- Number of holders
- 68
- Value change
- +$57,532,398
- Number of buys
- 45
- Number of sells
- 15
- Shares outstanding
- 67,017,829
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2020
Institutions
68
Top holders
10
GBIO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2021
Previous quarter: Q3 2020
Generation Bio Co. SEC filings
Generation Bio Co. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 37148K100
Recent filing periods:
Ownership snapshot
Top reported holders of GBIO - GENERATION BIO CO. - COMMON STOCK, $0.0001 PAR VALUE (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.
Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Sep 2020
13F
Lead comparable stake: 11%
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 11%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
11%
PRICE T ROWE ASSOCIATES INC /MD/
6.4%
Artal Group S.A.
4.2%
WELLINGTON MANAGEMENT GROUP LLP
3.7%
FARALLON CAPITAL MANAGEMENT LLC
3.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13F
Company
|
11%
|
$220,063,000
7,373,381 shares
|
— | 30 Sep 2020 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
6.4%
|
$128,866,000
4,320,962 shares
|
— | 30 Sep 2020 |
| Artal Group S.A. |
13F
Company
|
4.2%
|
$86,987,000
2,814,191 shares
|
— | 30 Sep 2020 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
3.7%
|
$76,285,000
2,487,138 shares
|
— | 30 Sep 2020 |
| FARALLON CAPITAL MANAGEMENT LLC |
13F
Company
|
3.2%
|
$65,549,000
2,120,625 shares
|
— | 30 Sep 2020 |
| Bellevue Group AG |
13F
Company
|
2.8%
|
$58,111,000
1,880,000 shares
|
— | 30 Sep 2020 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2020
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
68
Shares
31,971,964
Rows available
68
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-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. The marker flags a reported price that did not pass the local price check.
Compare Q4 2020 vs Q3 2020 Across Filers
Q3 2020 holders
52
Q4 2020 holders
68
Holder diff
16
| Investor | Q3 2020 Shares | Q4 2020 Shares | Share Diff | Share Chg % | Q3 2020 value | Q4 2020 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend