Key facts
- Icosavax, Inc. has 21 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are not currently available.
Insider Transactions Reported by 21 Insiders of Icosavax, Inc.
- Location
- Seattle, WA
Change
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Research use
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 26 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 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 |
Icosavax, Inc. executives and other stock owners filed with the SEC include:
Top shareholders of Icosavax, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: 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.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Qiming U.S. Healthcare Fund II, L.P. |
3/4/5
|
Former 10% Owner |
—
class O/S missing
|
3,523,561
|
$55,223,010 | — | 02 Aug 2021 | |
| Sanofi |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
3,155,169
|
$49,449,386 | — | 02 Aug 2021 | |
| NanoDimension III, L.P. |
3/4/5
|
Former 10% Owner |
—
class O/S missing
|
2,883,329
|
$45,188,974 | — | 02 Aug 2021 | |
| Cormorant Asset Management, LP |
3/4/5
|
Former 10% Owner |
—
class O/S missing
|
426,393
|
$6,682,644 | — | 02 Aug 2021 | |
| ADAMS STREET PARTNERS LLC |
3/4/5
|
Former 10% Owner |
—
class O/S missing
|
256,783
|
$4,024,432 | — | 02 Aug 2021 | |
| Tadataka Yamada |
3/4/5
|
Director |
—
class O/S missing
|
751,326
|
$11,775,157 | — | 28 Jul 2021 | |
| Douglas Holtzman |
3/4/5
|
Chief Scientific Officer |
—
mixed-class rows
|
321,467
mixed-class rows
|
$4,589,629 | — | 03 Jul 2023 | |
| Terry P. Gould |
3/4/5
|
Director |
—
class O/S missing
|
256,783
|
$4,024,432 | — | 02 Aug 2021 | |
| Charles E. Richardson |
3/4/5
|
SVP, Technical Operations |
—
class O/S missing
|
165,168
|
$2,588,595 | — | 29 Jul 2022 | |
| Elizabeth Balta |
3/4/5
|
General Counsel & Corp. Sec. |
—
mixed-class rows
|
203,007
mixed-class rows
|
$1,614,377 | — | 15 Feb 2023 |
Recent Insider Transactions by Companies or Individuals for Icosavax, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* An asterisk sign (*) next to the price indicates that the price is likely invalid.