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▼ SELL

$ Value

$3K

Shares

283

Price

$9

Filed

Dec 18

Insider

Name

Gagnon Robert E.

Title

CIK

0001504983

Roles

Director

Transaction Details

Transaction Date

2025-12-16

Code

S

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

41,678

Footnotes

The sale reported on this Form 4 represents shares sold by the Reporting Person to satisfy statutory withholding requirements in connection with the vesting of restricted stock units.

Filing Info

Accession No.

0001104659-25-122576

Form Type

4

Issuer CIK

0001526119

Gagnon Robert E.'s History

Date Ticker Type Value
2026-01-22 IRD A $0
2025-12-16 VSTM $3K
2025-09-16 VSTM $3K
2025-09-10 IRD A $0
2025-09-02 IRD A $0
2025-07-16 HBIO A $0
2025-06-16 VSTM $2K
2025-06-04 BBLG A $0
2025-05-22 VSTM A $0
2025-05-22 VSTM A $0

Other Insiders at VSTM (90d)

Insider Bought Sold Last
Paterson Dan
President and CEO
$6K 2026-02-04
Calkins Daniel
Chief Financial Officer
2026-03-20