Comparable stake leader
William D. Clark
SEC ownership of GENOCEA BIOSCIENCES, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001457612.
Disclosed value leader
William D. Clark
Comparable rows
0/14
Latest evidence
02 Jun 2022
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
William D. Clark
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
02 Jun 2022
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001457612
- Issuer location
- Cambridge, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GENOCEA BIOSCIENCES, 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
William D. Clark
Disclosed value leader
William D. Clark
Comparable rows
0/14
Latest evidence
02 Jun 2022
3/4/5
Highest disclosed value: $380,471
14 rows are not safely comparable across share classes.
Showing 1-8 of 14 holder rows.
Quick read
William D. Clark has the largest disclosed position value at $380.5K.
0 of 14 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 William D. Clark's linked filing trail.
Disclosed position value
Top 5
William D. Clark
$380.5K
Jessica Baker Flechtner
$111.3K
Diantha Duvall
$94.2K
Girish N. Aakalu
$93.1K
Thomas Andrew Davis
$85.4K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 14 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| William D. Clark |
3/4/5
President and CEO, Director
|
—
class O/S missing
|
$380,471
304,377 shares
|
— | 02 Jun 2022 |
| Jessica Baker Flechtner |
3/4/5
Chief Scientific Officer
|
—
class O/S missing
|
$111,284
89,027 shares
|
— | 02 Jun 2022 |
| Diantha Duvall |
3/4/5
CHIEF FINANCIAL OFFICER
|
—
class O/S missing
|
$94,235
75,388 shares
|
— | 02 Jun 2022 |
| Girish N. Aakalu |
3/4/5
CHIEF BUSINESS OFFICER
|
—
class O/S missing
|
$93,074
74,459 shares
|
— | 04 Apr 2022 |
| Thomas Andrew Davis |
3/4/5
CHIEF MEDICAL OFFICER
|
—
mixed-class rows
|
$85,413
162,080 shares
mixed-class rows
|
— | 04 Apr 2022 |
| Raymond D. Stapleton Jr. |
3/4/5
CHIEF TECHNOLOGY OFFICER
|
—
class O/S missing
|
$54,688
43,750 shares
|
— | 25 May 2022 |
| Jacquelyn L. Sumer |
3/4/5
CHIEF LEGAL & COMPLIANCE OFF
|
—
class O/S missing
|
$53,750
43,000 shares
|
— | 01 Jun 2022 |
| George Siber |
3/4/5
Director
|
—
class O/S missing
|
$315
252 shares
|
— | 27 May 2022 |
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 13 Sep 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 23 reporting-owner rows connected to GENOCEA BIOSCIENCES, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
23
Largest Forms 3/4/5 holder
William D. Clark
Net 12M change
$0
Latest report
02 Jun 2022
Recent insider transactions for GENOCEA BIOSCIENCES, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.