VivoSim Labs, INC. — Director's Dealing 2012

Aug 25, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ORGANOVO HOLDINGS, INC. (ONVO)
CIK: 0001497253
Period of Report: 2012-08-23

Reporting Person: MICHAELS BARRY D (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-23	Common Stock	F	79687	$2.10	Disposed	680313	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-23	Stock Option (Right to Buy)	$2.10	A	79687	Acquired	2023-08-23	Common Stock (79687)	Direct

Footnotes

F1: The shares were withheld at the election of the Reporting Person to satisfy tax withholding obligations in connection with the partial vesting of restricted stock units granted in August 2012.

F2: The option was automatically issued pursuant to the terms of the Reporting Person's Equity Incentive Award Agreement issued in August 2012.