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Form SD/A Filings

SEC Form SD/A is an amended filing used by companies to update or correct a previously submitted Form SD Specialized Disclosure Report with the Securities and Exchange Commission (SEC).

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ID Form Filer Name Filing Agent Date Actions
21980634SD/ATernium S.a.Iris Business Services /fa08/24/2026
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What Is SEC Form SD/A?

SEC Form SD/A is an important filing used to amend a previously filed Form SD under the Securities Exchange Act of 1934. It is typically submitted when a company needs to correct, update, or restate information previously reported in its Specialized Disclosure Report.

This form is generally filed when a registrant identifies an error, revises exhibit information, or needs to update disclosure originally provided under Rule 13p-1 or Rule 13q-1. Once Form SD/A is submitted, the amended report becomes part of the company’s public SEC filing record.

Form SD/A ensures transparency by formally notifying investors and regulators that a company has revised a previously filed Specialized Disclosure Report. It may be used to amend conflict minerals disclosure, related exhibits, or resource extraction payment disclosure.

Key elements typically found in SEC Form SD/A include:

  • Name of the registrant and amendment designation
  • Reference to the original Form SD being amended
  • Reporting period or fiscal year covered by the amendment
  • Description of the correction, revision, or restatement being made
  • Any amended exhibit information related to conflict minerals or resource extraction disclosure
  • Signature and date of the amended filing

SEC Form SD/A Filing Deadlines

SEC Form SD/A does not have a separate fixed amendment deadline in the form instructions. It is generally filed as needed after the original Form SD when a company must revise previously submitted disclosure or exhibit information, and investors may review related SEC insider trading disclosures alongside other company filings for additional context.

Filing Stage Timeline Details
Original Form SD Filing According to the applicable Form SD deadline The original Form SD must first be filed under the timing requirements of Rule 13p-1 or Rule 13q-1.
Form SD/A Filing As needed Filed electronically with the SEC to amend or restate a previously submitted Form SD.
Amendment Effective Date Upon filing The amended disclosure becomes part of the company’s public SEC filing record once submitted.
Separate Waiting Period Not applicable Form SD/A does not trigger a separate automatic waiting period like certain other SEC filing types.

Key Things to Know About Form SD/A Filing Rules

  • Amendment of Prior Filing Required: Form SD/A is only used to revise a previously filed Form SD and is not a standalone initial report.
  • No Separate Fixed Amendment Deadline: Unlike the original Form SD, the amendment is generally filed as needed when corrections or updates become necessary.
  • May Apply to Different Disclosure Regimes: Form SD/A may be used to amend disclosure related to conflict minerals under Rule 13p-1 or resource extraction payments under Rule 13q-1.
  • Exhibits May Also Be Revised: Companies often use Form SD/A to amend exhibit information, including a Conflict Minerals Report or other Form SD-related attachments.
  • Corrections Should Be Clearly Identified: Many Form SD/A filings include an explanatory note describing the specific correction, update, or restatement being made.

To monitor specialized and core disclosure filings, covering annual conflict minerals/resource extraction reports, amendments, comprehensive annual reports, and event‑driven updates, our platform helps to track Form SD, Form SD/A, Form 10‑K, and Form 8‑K.

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