The SEC has opened an administrative proceeding against Tombstone Exploration Corp. under Section 12(j) of the Securities Exchange Act after the company failed to keep its periodic reporting current. According to the Commission, Tombstone Exploration has not filed a periodic report since submitting a Form 20-F covering the year ended December 31, 2021. The proceeding places the company's Exchange Act registration at risk and highlights a recurring due-diligence issue for investors researching thinly traded OTC issuers: market quotations may continue to exist even when the underlying SEC reporting record has been inactive for years.
U.S. Securities and Exchange Commission (SEC)
Official Release: https://www.sec.gov/files/litigation/admin/2026/34-106453.pdf
NEWS:
The U.S. Securities and Exchange Commission instituted an administrative proceeding against Tombstone Exploration Corp. on September 21, 2026, under Section 12(j) of the Securities Exchange Act of 1934. The SEC identifies Tombstone Exploration, CIK No. 1072772, as a Canadian corporation located in Scottsdale, Arizona whose securities are registered under Section 12(g). According to the Commission's order, the company is delinquent in its reporting obligations because it has not filed a periodic report since its Form 20-F for the period ended December 31, 2021. Despite that extended reporting gap, unsolicited quotations for the company's common stock, trading under the symbol TMBXF, continue to be submitted on OTC Link ATS.
The SEC further alleges that Tombstone Exploration repeatedly failed to satisfy its obligation to file timely periodic reports. The order states that the company either failed to respond to a delinquency letter from the SEC's Division of Corporation Finance or did not receive the letter because it failed to maintain a valid address with the Commission. That detail makes the proceeding more significant than a simple late-filing event: regulators are questioning not only the missing reports but also whether the issuer maintained the basic contact information necessary for SEC communications. For investors, that creates a substantial information gap because financial statements, operating updates, risk disclosures and management certifications may no longer be current.
Section 12(j) gives the SEC authority to suspend or revoke the registration of a security when an issuer has failed to comply with Exchange Act requirements. The September 21 order institutes proceedings and provides for a hearing; it is not itself a final finding that Tombstone Exploration's registration has already been revoked. The distinction matters. However, the filing history illustrates why an OTC quotation should not be treated as evidence that an issuer is current with SEC reporting. When the latest periodic filing is years old, investors may be relying on business and financial information that no longer reflects the company's present condition, capital structure or operations.
KEY POINTS:
- The SEC instituted proceedings against Tombstone Exploration Corp. on September 21, 2026.
- The matter is Administrative Proceeding File No. 3-22743 and Exchange Act Release No. 106453.
- Tombstone Exploration is identified by the SEC as a Canadian corporation located in Scottsdale, Arizona.
- Its CIK is 1072772 and its OTC trading symbol is TMBXF.
- The SEC says the company has not filed a periodic report since its Form 20-F for the year ended December 31, 2021.
- Unsolicited quotations for TMBXF continue to be submitted on OTC Link ATS despite the reporting gap.
- The SEC says the issuer failed to respond to a delinquency letter or may not have received it because it did not maintain a valid address with the Commission.
- The proceeding could ultimately result in suspension or revocation of the company's Exchange Act registration, but the September 21 order itself begins the proceeding rather than announcing a final revocation.