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$ Value

$0

Shares

16,665

Price

$0

Filed

Jan 23

Insider

Name

Calkins Daniel

Title

Chief Financial Officer

CIK

0001951861

Roles

Officer

Transaction Details

Transaction Date

2026-01-21

Code

A

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

121,384

Footnotes

Restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest as to 33.3% of the RSUs on the first three anniversaries of January 21, 2026 such that the award is fully vested on January 21, 2029 (with the number of RSUs vesting on each vesting date rounded down to the nearest whole RSU, except with respect to the final vesting date on which all remaining unvested RSUs 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.

0001104659-26-006282

Form Type

4

Issuer CIK

0001526119

Calkins Daniel's History

Date Ticker Type Value
2026-03-20 VSTM A $327
2026-01-21 VSTM A $0
2026-01-12 VSTM $36K
2025-12-24 VSTM $629
2025-09-24 VSTM $231
2025-09-22 VSTM $518
2025-06-23 VSTM $118
2025-06-20 VSTM $21K
2025-05-20 VSTM $91K
2025-05-16 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