Comparable stake leader
Jason Cole
SEC ownership of bluebird bio, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001293971.
Disclosed value leader
Jason Cole
Comparable rows
0/20
Latest evidence
02 Jun 2025
- Ownership evidence mix
- 3/4/5
- Largest current holder
- Jason Cole
- Latest evidence date
- 02 Jun 2025
- CIK
- 0001293971
- Location
- Somerville, MA
Ownership snapshot
1 signal
Issuer identity
2 identity fields
Ownership snapshot
Top shareholders of bluebird bio, Inc. (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
Jason Cole
Disclosed value leader
Jason Cole
Comparable rows
0/20
Latest evidence
02 Jun 2025
3/4/5
Highest disclosed value: $270,937
20 rows are not safely comparable across share classes.
Showing 1-8 of 20 holder rows.
Quick read
Jason Cole has the largest disclosed position value at $270.9K.
0 of 20 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.
Disclosed position value
Top 5
Jason Cole
$270.9K
Gina Consylman
$179.2K
Jessica Whitten
$81.4K
Christopher Krawtschuk
$65K
Anne-Virginie Eggimann
$60.4K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 20 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Jason Cole |
3/4/5
Chief Strategy & Financial Off
|
—
class O/S missing
|
$270,937
189,546 shares
|
— | 19 Aug 2022 |
| Gina Consylman |
3/4/5
Chief Financial Officer
|
—
mixed-class rows
|
$179,225
175,385 shares
mixed-class rows
|
— | 01 Feb 2022 |
| Jessica Whitten |
3/4/5
Chief Accounting Officer
|
—
mixed-class rows
|
$81,351
71,913 shares
mixed-class rows
|
— | 01 Feb 2022 |
| Christopher Krawtschuk |
3/4/5
Chief Financial Officer
|
—
mixed-class rows
|
$65,001
244,474 shares
mixed-class rows
|
— | 01 Mar 2024 |
| Anne-Virginie Eggimann |
3/4/5
Chief Regulatory Officer
|
—
class O/S missing
|
$60,395
42,252 shares
|
— | 12 Jul 2022 |
| Philip D. Gregory |
3/4/5
Chief Scientific Officer
|
—
class O/S missing
|
$48,781
34,127 shares
|
— | 11 Nov 2021 |
| William D. Baird III |
3/4/5
Chief Financial Officer
|
—
class O/S missing
|
$32,586
22,797 shares
|
— | 11 Nov 2021 |
| Wendy L. Dixon |
3/4/5
Director
|
—
mixed-class rows
|
$17,001
21,932 shares
mixed-class rows
|
— | 11 Nov 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.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 01 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 27 reporting-owner rows connected to bluebird bio, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
27
Largest current holder
Jason Cole
Net 12M change
$0
Latest report
02 Jun 2025
Recent insider transactions for bluebird bio, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Joseph Vittiglio | BLUE | Common Stock | Award | 2,500 | 2,500 | 02 Jun 2025 | Direct | |||
| Joseph Vittiglio | BLUE | Common Stock | Disposed to Issuer | -100% | -5,625 | 0 | 02 Jun 2025 | Direct | ||
| John O Agwunobi | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Mark Vachon | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Richard A. Colvin | BLUE | Common Stock | Award | 2,500 | 2,500 | 02 Jun 2025 | Direct | |||
| Richard A. Colvin | BLUE | Common Stock | Disposed to Issuer | -100% | -6,666 | 0 | 02 Jun 2025 | Direct | ||
| Najoh Tita-Reid | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Andrew Obenshain | BLUE | Common Stock | Award | 14,820 | 14,820 | 02 Jun 2025 | Direct | |||
| Andrew Obenshain | BLUE | Common Stock | Disposed to Issuer | -100% | -24,120 | 0 | 02 Jun 2025 | Direct | ||
| Elisabeth Leiderman | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Charlotte Jones-Burton | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Thomas J. Klima | BLUE | Common Stock | Award | 2,500 | 2,500 | 02 Jun 2025 | Direct | |||
| Thomas J. Klima | BLUE | Common Stock | Disposed to Issuer | -100% | -6,964 | 0 | 02 Jun 2025 | Direct | ||
| O James Sterling | BLUE | Common Stock | Award | 2,500 | 2,500 | 02 Jun 2025 | Direct | |||
| O James Sterling | BLUE | Common Stock | Disposed to Issuer | -100% | -7,500 | 0 | 02 Jun 2025 | Direct | ||
| Nick Leschly | BLUE | Common Stock | Disposed to Issuer | -100% | -1,245 | 0 | 02 Jun 2025 | Direct | ||
| Richard A. Paulson | BLUE | Common Stock | Disposed to Issuer | -100% | -1,323 | 0 | 02 Jun 2025 | Direct | ||
| Michael Cloonan | BLUE | Common Stock | Disposed to Issuer | -100% | -1,867 | 0 | 02 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.