Summary Notice to Stockholders of Supernova Partners Acquisition Company, Inc. Class A Common Stock as of August 27, 2021

IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE

SUMMARY NOTICE OF PENDENCY AND PROPOSED
SETTLEMENT OF STOCKHOLDER CLASS ACTION,
SETTLEMENT HEARING, AND RIGHT TO APPEAR

TO: All Persons who held shares of Supernova Partners Acquisition Company, Inc. (“Supernova”) Class A Common Stock as of 5:00 PM EDT on August 27, 2021 (the “Redemption Deadline”), either of record or beneficially, and who did not redeem all of their shares, including their successors in interest who obtained their shares by operation of law, but excluding the Excluded Persons (as defined in the Stipulation and the Notice) (the “Class”).¹

PLEASE READ THIS SUMMARY NOTICE CAREFULLY. YOUR RIGHTS WILL BE AFFECTED BY A CLASS ACTION LAWSUIT PENDING IN THIS COURT.

YOU ARE HEREBY NOTIFIED, pursuant to Delaware Court of Chancery Rules 23(a), 23(b)(1), and 23(b)(2) and an Order of the Court of Chancery of the State of Delaware (the “Court”), that the above-captioned stockholder class action (the “Action”) is pending in the Court.

YOU ARE ALSO NOTIFIED that (i) plaintiff Terry Jandreau (“Plaintiff”), individually and on behalf of the Class; and (ii) defendants Alexander Klabin, Spencer Rascoff, Ken Fox, Jim Lanzone, Gregg Renfrew, Rajeev Singh, Robert Reid, Michael Clifton, Supernova Partners, LLC (“Supernova Sponsor”), Michael Burnett, and Brian Bair (“Former Defendants”) (collectively, “Defendants,” and together with Plaintiff, the “Parties,” and each a “Party”), have reached a proposed cash settlement for $3,000,000.00 in total (the “Settlement Amount”), as set forth in the Stipulation. The Settlement, if approved, will resolve all claims in the Action against the Defendants. A copy of the Settlement is available at www.SupernovaDeSPACStockholderSettlement.com.

A hearing (the “Settlement Hearing”) will be held on December 2, 2026 at 3:15 p.m., before The Honorable Paul A. Fioravanti, Jr., Vice Chancellor, either in person at the Court of Chancery of the State of Delaware, Leonard L. Williams Justice Center, 500 North King Street, Wilmington, Delaware, 19801, or remotely by telephone or videoconference (in the discretion of the Court), to, among other things: (i) determine whether to finally certify the Class for settlement purposes only, pursuant to Court of Chancery Rules 23(a), 23(b)(1), and 23(b)(2); (ii) determine whether Plaintiff and Plaintiff’s Counsel have adequately represented the Class, and whether Plaintiff should be finally appointed as Class representatives for the Class and Plaintiff’s Counsel should be finally appointed as Class counsel for the Class; (iii) determine whether the proposed Settlement on the terms and conditions provided for in the Stipulation should be approved as fair, reasonable, and adequate to the Class and in the best interests of the Class; (iv) determine whether the Action should be dismissed with prejudice and the Releases provided under the Stipulation should be granted; (v) determine whether the Order and Final Judgment approving the Settlement should be entered; (vi) determine whether the proposed Plan of Allocation of the Net Settlement Fund is fair and reasonable, and should therefore be approved; (vii) determine whether and in what amount any Fee and Expense Award should be paid to Plaintiff’s Counsel out of the Settlement Fund; (viii) hear and rule on any objections to the Settlement, the proposed Plan of Allocation, and/or Plaintiff’s Counsel’s application for a Fee and Expense Award; (ix) determine whether and in what amount any service award should be paid to Plaintiff (up to a requested amount of $3,000) to Plaintiff, to be paid exclusively out of the Fee and Expense Award; and (x) consider any other matters that may properly be brought before the Court in connection with the Settlement. Any updates regarding the Settlement Hearing, including any changes to the date or time of the hearing or updatesregarding in-person or remote appearances at the hearing, will be posted to the Settlement website, www.SupernovaDeSPACStockholderSettlement.com.

If you are a member of the Class, your rights will be affected by the pending Action and the Settlement, and you may be entitled to share in the Net Settlement Fund. You may obtain a copy of the Notice by contacting the Settlement Administrator at Supernova Stockholder Settlement, c/o Epiq Systems, Inc., PO Box 2587, Portland, OR 97208-2587. A copy of the Notice can also be downloaded from the Settlement website, www.SupernovaDeSPACStockholderSettlement.com.

To receive a share of the Net Settlement Fund, you must complete and submit a Claim Form by no later than January 2, 2026. The Claim Form is Exhibit B-1 to the Stipulation, and may be viewed and downloaded at www.
SupernovaDeSPACStockholderSettlement.com. If you do not complete and submit a timely Claim Form, you will not receive any portion of the Net Settlement Fund but may still be bound by its outcome.

Any objections to the Settlement, the proposed Plan of Allocation, or Plaintiff’s Counsel’s application for the Fee and Expense Award must be filed with the Register in Chancery in the Court of Chancery of the State of Delaware and delivered to Plaintiff’s Counsel and Defendants’ Counsel such that they are received no later than November 17, 2026, in accordance with the instructions set forth in the Notice.

Please do not contact the Court or the Office of the Register in Chancery regarding this Summary Notice. All questions about this Summary Notice, the Settlement, or your eligibility to participate in the Settlement should be directed to the Settlement Administrator or Plaintiff’s Counsel.

Requests for the Notice and Claim Form should be made to the Settlement Administrator:

Inquiries, other than requests for the Notice and Claim Form, should be made to Plaintiff’s Counsel:

BY ORDER OF THE COURT OF CHANCERY OF THE STATE OF DELAWARE:

Dated: August 10, 2026