Kenneth Carl Anderson - 02 Jan 2026 Form 4 Insider Report for C4 Therapeutics, Inc. (CCCC)

Reporting relationship: Director
Issuer ticker: CCCC
Reported as of: 02 Jan 2026
Net transaction value: +$11,499
SEC form: 4
Accepted by SEC: 05 Jan 2026, 16:10:46 UTC
Prior SEC filing: 03 Oct 2025
Next SEC filing: 03 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Jolie M. Siegel, Attorney-in-Fact

Filing notes and source

Key filing fact

Kenneth Carl Anderson filed Form 4 for C4 Therapeutics, Inc. (CCCC) on 05 Jan 2026.

Key facts

This page summarizes Kenneth Carl Anderson's Form 4 filing for C4 Therapeutics, Inc. (CCCC).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Jan 2026, 16:10.

Change

Previous filing in this sequence was filed on 03 Oct 2025.
Current net transaction value: +$11,499.

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 0001824862 Primary reporting owner

Anderson Kenneth Carl

Relationship: Director
Address: C/O C4 THERAPEUTICS, INC., 490 ARSENAL WAY #120, WATERTOWN
Signature: /s/ Jolie M. Siegel, Attorney-in-Fact
Signature date: 05 Jan 2026

Reported non-derivative transactions

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

CCCC transaction

Common Stock

Award

Transaction value: $11,499
Shares: +5,958
Change %: +4.2%
Price: $1.93
Shares after: 146,532
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F1, F2

CCCC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 47,316
Date: 02 Jan 2026
Ownership: By Spouse

CCCC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 61,265
Date: 02 Jan 2026
Ownership: By Kenneth C. Anderson 2016 Grantor Retained Annuity Trust
Footnotes: F3

CCCC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 61,265
Date: 02 Jan 2026
Ownership: By Cynthia E. Anderson 2016 Grantor Retained Annuity Trust
Footnotes: F4

CCCC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 16,939
Date: 02 Jan 2026
Ownership: By Kenneth C. Anderson 2015 Irrevocable Trust
Footnotes: F5

CCCC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 16,939
Date: 02 Jan 2026
Ownership: By Cynthia E. Anderson 2015 Irrevocable Trust
Footnotes: F6

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

These shares were issued in accordance with the Issuer's Non-Employee Director Compensation Policy, pursuant to which the Reporting Person elected to receive shares of the Issuer's common stock in lieu of cash compensation for services as a non-employee director of the Issuer.

Footnote F2

The price reported in Column 4 is based upon the closing market price of the Issuer's common stock on January 2, 2026.

Footnote F3

Shares held by the Kenneth C. Anderson 2016 Grantor Retained Annuity Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Footnote F4

Shares held by the Cynthia E. Anderson 2016 Grantor Retained Annuity Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Footnote F5

Shares held by the Kenneth C. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Footnote F6

Shares held by the Cynthia E. Anderson 2015 Irrevocable Trust. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

SEC remarks

Exhibit 24 - Power of Attorney

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