Mass. S.J.C. R. 1:21

(a) Who must file

In civil and criminal cases in the Trial Court and appellate courts, any nongovernmental corporate party to a proceeding must file a statement identifying all its parent corporations and listing any publicly held corporation that owns 10% or more of the party's stock or stating that there is no such corporation. In a criminal case, if an organization is a victim of the alleged criminal activity, the government must file a statement identifying the victim and if the victim is a corporation providing the information required by this paragraph.

(b) Time for filing

The manner of filing the corporate disclosure statement shall be as follows:

(i) Appellate Court.

In an appellate court, a party must file an original and nine copies of the statement required in paragraph (a) within thirty days of the entry of the appeal upon the docket. In the single justice session of the Supreme Judicial Court, a party must file in accordance with subparagraph (ii). Even if such statement has already been filed, the party's principal brief must include the statement before the table of contents.

(ii) Trial Court; Civil Case.

In a civil case in the Trial Court, a party must file an original and one copy of the statement required in paragraph (a) with its first appearance, pleading, petition, motion, response or other request. A copy of the statement must also be filed with each contested motion.

(iii) Trial Court; Criminal Case.

In a criminal case in the Trial Court, a party must file an original and one copy of the statement required in paragraph (a) upon the defendant's initial appearance pursuant to Mass. R. Crim. P. 7. A copy of the statement must also be filed with each contested motion.

(c) Supplemental filing

In any case, a party shall promptly file a supplemental statement upon any change in the information that the statement requires.