Comparable stake leader
ARCH Venture Fund VIII, L.P.
SEC ownership of Codiak BioSciences, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001659352.
Disclosed value leader
—
Comparable rows
0/16
Latest evidence
30 Mar 2023
- Parsed ownership sources
- 3/4/5
- Largest SEC-reported holder
- ARCH Venture Fund VIII, L.P.
- Latest parsed ownership date
- 30 Mar 2023
- Issuer CIK
- 0001659352
- 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 Codiak 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
ARCH Venture Fund VIII, L.P.
Disclosed value leader
—
Comparable rows
0/16
Latest evidence
30 Mar 2023
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
16 rows are not safely comparable across share classes.
Showing 1-8 of 16 holder rows.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 16 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 ARCH Venture Fund VIII, L.P.'s linked filing trail.
Detailed SEC evidence table Showing 1-8 of 16 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ARCH Venture Fund VIII, L.P. |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
13,854,098 shares
mixed-class rows
|
— | 13 Sep 2022 |
| Flagship Ventures Fund V General Partner LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
4,473,969 shares
mixed-class rows
|
— | 15 Sep 2022 |
| David J. Mauro |
3/4/5
Chief Medical Officer
|
—
class O/S missing
|
—
190,000 shares
|
— | 24 Jan 2023 |
| Jennifer J. Wheler |
3/4/5
Chief Medical Officer
|
—
class O/S missing
|
—
100,000 shares
|
— | 10 May 2021 |
| Benny Sorensen |
3/4/5
Former SVP, Clinical Development
|
—
class O/S missing
|
—
87,411 shares
|
— | 08 Jun 2021 |
| Richard Brudnick |
3/4/5
Officer title: Chief Business Officer and Head of Corporate Strategy
|
—
mixed-class rows
|
—
27,125 shares
mixed-class rows
|
— | 16 Feb 2022 |
| Kyriazi Theo Melas |
3/4/5
Director
|
—
class O/S missing
|
—
15,350 shares
|
— | 16 Feb 2023 |
| Anne-Virginie Eggimann |
3/4/5
Director
|
—
mixed-class rows
|
—
9,000 shares
mixed-class rows
|
— | 17 Jun 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 05 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 1-19 of 19 reporting-owner rows connected to Codiak BioSciences, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Douglas E. Williams
Net 12M change
$0
Latest report
30 Mar 2023
Recent insider transactions for Codiak 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.