TWIN DISC INC — Director's Dealing 2010

Oct 19, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TWIN DISC INC (TWIN)
CIK: 0000100378
Period of Report: 2010-10-15

Reporting Person: ZIMMER DAVID R (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-10-15	Common Stock	A	2748	$16.37	Acquired	14108	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Options	$6.225	2014-10-15	Common Stock (1200)	1200	Direct
Stock Options	$10.1125	2015-10-21	Common Stock (1200)	1200	Direct
Stock Options	$18.005	2016-10-20	Common Stock (1200)	1200	Direct
Stock Options	$14.61	2019-10-16	Common Stock (1200)	1200	Direct
Stock Options	$27.545	2017-10-19	Common Stock (1200)	1200	Direct
Stock Options	$10.01	2018-10-17	Common Stock (1200)	1200	Direct

Footnotes

F1: Award of Restricted Stock Pursuant to 2010 Stock Incentive Plan for Non-Employee Directors. Stock Grant will be fully vested on the date of the next annual meeting.

F2: Total includes 7,760 shares of common stock held in Reporting Person's self-directed IRA.