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$ Value

$0

Shares

200,000

Price

$0

Filed

Jan 8

Insider

Name

Kauffman Michael

Title

President of Development

CIK

0001364719

Roles

Director Officer

Transaction Details

Transaction Date

2026-01-06

Code

A

Table

Derivative

Ownership

Direct

Equity Swap

No

Shares After

200,000

Footnotes

The stock option vests 33.33% of the shares on the first anniversary of January 6, 2026 (the "Grant Date"), and an additional 8.33% will vest at the end of each successive three-month period following the first anniversary of the Grant Date until the third anniversary of the Grant Date (with the number of shares vesting on each vesting date rounded down to the nearest whole share, except with respect to the final vesting date on which all remaining unvested shares shall vest) provided that the Reporting Person continues to serve as an employee of or other service provider to the Issuer on each such vesting date.

Filing Info

Accession No.

0001104659-26-002117

Form Type

4

Issuer CIK

0001526119

Kauffman Michael's History

Date Ticker Type Value
2026-01-06 VSTM A $0
2025-11-21 VSTM $86K
2025-06-18 KZR A $0
2025-06-04 FGEN A $0
2025-06-04 FGEN 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