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BCS

Initial Beneficial Ownership · 3

TransCode Therapeutics, Inc.

RNAZNASDAQEQUITYCurrent

Initial Beneficial Ownership

Filed Sep 21, 2026Accepted Sep 21, 2026, 5:42 PM EDTFiling CIK 1829635Accession 0001104659-26-109371
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Structured filing — 3

tm2625857-1_3seq1.xml

Open full document ↗

Filing details

Report period
2026-09-10
Issuer
Transcode Therapeutics, Inc.
Issuer CIK
0001829635
Trading symbol
RNAZ
No securities owned
Checked

Reporting owner 1

Name
Tattory John A
Reporting owner CIK
0001499834
Relationship
Officer
Officer title
Interim CFO
Address
C/O TRANSCODE THERAPEUTICS, INC., 6 LIBERTY SQUARE, #2382, BOSTON, MA, 02109

Remarks

Exhibit 24: Power of Attorney

Signature 1

Signed
/s/ Philippe P. Calais, Attorney-in-Fact
Date
2026-09-21

Filed exhibits

Company context

TransCode is a clinical-stage company pioneering immuno-oncology and RNA therapeutics for treatment of high risk and advanced cancers We possess a diversified pipeline of therapeutic candidates, including two clinical stage assets, TTX-MC138, an antisense inhibitor of an oncogenic microRNA and Seviprotimut-L, a cancer vaccine. We also possess an oncolytic immunotherapy platform and three TTX-based pre-clinical stage assets.

Current securities

Recent company filings

  1. Other EventsOct 28, 2026
  2. Entry into a Material Definitive Agreement · Triggering Events That Accelerate or Increase a Direct Financial ObligationOct 1, 2026
  3. Other EventsSep 28, 2026
  4. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory ArrangementsSep 11, 2026
  5. 10-Q filingAug 14, 2026

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