Ryan L. Polk - 02 Mar 2026 Form 4 Insider Report for SideChannel, Inc. (SDCH)

Reporting relationship: Chief Financial Officer
Issuer ticker: SDCH
Reported as of: 02 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Mar 2026, 13:26:26 UTC
Prior SEC filing: 05 Mar 2025
Source filing: View source filing
Reporting owner signature: /s/ Ryan L. Polk

Key filing fact

Ryan L. Polk filed Form 4 for SideChannel, Inc. (SDCH) on 18 Mar 2026.

Key facts

This page summarizes Ryan L. Polk's Form 4 filing for SideChannel, Inc. (SDCH).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 18 Mar 2026, 13:26.

Change

Previous filing in this sequence was filed on 05 Mar 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001492514 Primary reporting owner

Polk Ryan

Relationship: Chief Financial Officer
Address: 146 MAIN STREET, SUITE 405, WORCESTER,
Signature: /s/ Ryan L. Polk
Signature date: 18 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SDCH transaction

Restricted Stock Unit

Tax liability

Transaction value
Shares: -25,745
Change %: -43%
Price: $2.20^*
Shares after: 34,130
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F2, F3

SDCH transaction

Restricted Stock Unit

Award

Transaction value
Shares: +35,574
Change %: +104%
Price: $2.01^*
Shares after: 69,704
Date: 16 Mar 2026
Ownership: Direct
Footnotes: F3, F4, F5

SDCH holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 31,229
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

SDCH holding

Restricted Stock Unit

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 59,875
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

SDCH holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 46,372
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Represents the total amount of securities beneficially owned by the Reporting Person following the 1 for 52 reverse stock split, effective January 22, 2026.

Footnote F2

On March 2, 2026, 25,745 RSUs vested, 10,602 shares of common stock otherwise issuable pursuant to the vesting were withheld for the payment of taxes, resulting in the issuance of 15,143 shares of common stock to the Reporting Person.

Footnote F3

The closing price of the issuer's common stock on the transaction date.

Footnote F4

Represents the total amount of securities beneficially owned by the Reporting Person following the reported transactions above.

Footnote F5

Represents a 35,574 RSU award, one third of which shall vest on the first business day of each subsequent March, for the following three years.