VivoSim Labs, INC. — Director's Dealing 2019

May 20, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ORGANOVO HOLDINGS, INC. (ONVO)
CIK: 0001497253
Period of Report: 2019-05-16

Reporting Person: Gallant Paul (General Manager)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-05-16	Common Stock	F	9274	$0.97	Disposed	200835	Direct

Footnotes

F1: Represents the mandatory sale of shares to satisfy the Reporting Person's tax withholding obligations, in connection with the partial vesting and settlement of restricted stock units granted in July 2016, June 2017 and May 2018, pursuant to the Reporting Person's agreement with the Issuer.

F2: This number does not include 1,036,667 shares of common stock underlying outstanding options held by Mr. Gallant; post-transaction Mr. Gallant beneficially owns or has a right to acquire 1,237,502 shares of common stock.