Security key
37148K100
GENERATION BIO CO. - COMMON STOCK, $0.0001 PAR VALUE (GBIO)
CUSIP: 37148K100
Q2 2021 13F Holders as of 30 Jun 2021
- Security type / class
- Equity / COMMON STOCK, $0.0001 PAR VALUE
- Total 13F shares
- 46,476,896
- Total 13F value
- $1,249,307,742
- Share change
- +1,911,789
- SEC-reported price per share
- $26.90
- Number of holders
- 95
- Value change
- +$48,933,202
- Number of buys
- 57
- Number of sells
- 31
- Shares outstanding
- 67,017,829
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2021
Institutions
95
Top holders
10
GBIO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2021
Previous quarter: Q1 2021
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
31 Mar 2021
13F
Lead comparable stake: 13%
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 13%.
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
13%
PRICE T ROWE ASSOCIATES INC /MD/
9.7%
FARALLON CAPITAL MANAGEMENT LLC
4.9%
VANGUARD GROUP INC
4.4%
BlackRock Finance, Inc.
4.3%
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
|
13%
|
$240,889,000
8,464,109 shares
|
— | 31 Mar 2021 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
9.7%
|
$184,550,000
6,484,544 shares
|
— | 31 Mar 2021 |
| FARALLON CAPITAL MANAGEMENT LLC |
13F
Company
|
4.9%
|
$93,078,000
3,270,500 shares
|
— | 31 Mar 2021 |
| VANGUARD GROUP INC |
13F
Company
|
4.4%
|
$83,541,000
2,935,382 shares
|
— | 31 Mar 2021 |
| BlackRock Finance, Inc. |
13F
Company
|
4.3%
|
$82,917,000
2,913,455 shares
|
— | 31 Mar 2021 |
| Artal Group S.A. |
13F
Company
|
4.2%
|
$80,092,000
2,814,191 shares
|
— | 31 Mar 2021 |
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 Q2 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
95
Shares
46,476,896
Rows available
95
| 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 Q2 2021 vs Q1 2021 Across Filers
Q1 2021 holders
86
Q2 2021 holders
95
Holder diff
9
| Investor | Q1 2021 Shares | Q2 2021 Shares | Share Diff | Share Chg % | Q1 2021 value | Q2 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend