Del. Ch. Ct. R. 15 (2026)

Rule 15(c)(2) is satisfied and, within 120 days of the filing of the complaint, or such additional time the Court allows for good cause shown, the party to be brought in by amendment: (A) has received such notice of the institution of the action that the party will not be prejudiced in maintaining a defense on the merits; and (B) knew or should have known that, but for a mistake concerning the identity of the proper party, the action would have been brought against the party. (d) Supplemental Pleadings. On a motion, the Court may permit a party to serve a supplemental pleading setting out any transaction, occurrence or event that happened after the date of the pleading to be supplemented. The Court may permit supplementation even though the original pleading is defective in stating a claim or defense. If the Court permits the supplemental pleading, the opposing party must respond within 10 days after service of the pleading. History. Amended, effective June 1, 2001; Jan. 4, 2006, effective Feb. 1, 2006; Dec. 31, 2008, effective Mar. 2, 2009; Dec. 15, 2014, effective Jan. 1, 2015; May 31, 2024, effective June 14, 2024.