exv4w4



 





EXHIBIT 4.4



AMENDMENT NO. 2 TO INVESTOR’S RIGHTS AGREEMENT




     THIS AMENDMENT NO. 2 TO INVESTOR’S RIGHTS AGREEMENT is entered into effective this 19th day of
September, 2007 (this “Amendment No. 2”), by and among Cardiovascular Systems, Inc., a Minnesota
Corporation (the “Company”) , the Series A-1 Convertible Preferred Stockholders listed on Exhibit A
hereto (“Series A-1 Investors”), and the Investors signatory hereto.



RECITALS




     WHEREAS, this Amendment No. 2 amends an Investor’s Rights Agreement, dated July 19, 2006 (the
"Investor’s Rights Agreement”) by and between the Company and the “Investors” set forth on Schedule
A thereto and “Stockholders” set forth on Schedule B thereto, as amended by Amendment No. 1 to
Investor’s Rights Agreement, dated October 3, 2006 by and between the Company, ITX International
Equity Corp. and the “Investors” signatory thereto;



     WHEREAS, the Company has agreed to sell up to 2,941,177 shares of Series A-1 Convertible
Preferred Stock to the Series A-1 Investors (the “Offering”) in accordance with the terms of that
certain Private Placement Memorandum dated May 16, 2007, as supplemented on August 8, 2007, and
those certain Subscription Agreements by and between the Company and the Series A-1 Investors
received in connection with the Offering (the “Subscription Agreements”);



     WHEREAS, on May 21, 2007, the Company’s Board of Directors approved the sale of up to
1,175,000 shares of Series A-1 Convertible Preferred Stock to the Series A-1 Investors and the
transactions contemplated by the Subscription Agreements including this Amendment No. 2, and on
August 7, 2007 the Board further authorized that the Offering be increased to not more than
2,941,177 shares of Series A-1 Convertible Preferred Stock; and



     WHEREAS, Investors executing this Amendment No. 2 hold at least 66 2/3% of the combined voting
power of the outstanding shares of Series A Preferred Stock and any Common Stock issued upon
conversion of the Series A Preferred Stock.



     NOW THEREFORE, in consideration of the mutual covenants and agreements contained in this
Amendment No. 2, the sufficiency of which is hereby acknowledged, the parties hereto agree as set
forth below:




	 	1.	 	Defined Terms. Capitalized terms not defined herein shall have the meanings ascribed
to them in the Investor’s Rights Agreement.
	 
	 	2.	 	The Series A-1 Convertible Preferred Stock sold in the Offering shall be deemed
additional shares of Series A Convertible Preferred Stock for purposes of the Investor’s
Rights Agreement.




1









 






	 	3.	 	Schedule A is hereby amended in its entirety as follows and each of the Series A-1
Investors shall be deemed an Investor as that term is used in the Investor’s Rights
Agreement:





Investors




	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	Easton Hunt Capital Partners, L.P.
	 	 	612,960	 	 	 	87,040	 	 	 	—	 	 	 	—	 
	Easton Hunt Partners, LP
	 	 	612,960	 	 	 	87,040	 	 	 	—	 	 	 	—	 
	Maverick Fund, L.D.C.
	 	 	770,212	 	 	 	109,370	 	 	 	103,524	 	 	$	879,954.00	 
	Maverick Fund USA, Ltd.
	 	 	310,952	 	 	 	44,155	 	 	 	41,795	 	 	$	355,257.50	 
	Maverick Fund II, Ltd.
	 	 	670,149	 	 	 	95,161	 	 	 	90,075	 	 	$	765,637.50	 
	Mitsui & Co. Venture Partners II, L.P.
	 	 	675,148	 	 	 	95,871	 	 	 	117,647	 	 	$	999,999.50	 
	ITX International Equity Corp.
	 	 	350,263	 	 	 	49,737	 	 	 	47,079	 	 	$	400,171.50	 
	Abrasive Technology, Inc. Profit Shar Pl
	 	 	—	 	 	 	—	 	 	 	32,000	 	 	$	272,000.00	 
	Michael Adrian
	 	 	8,943	 	 	 	1,270	 	 	 	3,552	 	 	$	30,200.00	 
	Mark R. Alvig
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Shahla Amiri
	 	 	—	 	 	 	—	 	 	 	5,000	 	 	$	42,500.00	 
	Anthony Angelini
	 	 	—	 	 	 	—	 	 	 	12,000	 	 	$	102,000.00	 
	Michael J. Antonello
	 	 	35,937	 	 	 	5,103	 	 	 	18,255	 	 	$	155,167.50	 
	Massoud Arbabzadeh, MD
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	49,997.00	 
	Naoum Baladi
	 	 	—	 	 	 	—	 	 	 	28,000	 	 	$	238,000.00	 
	Michael S. Barish
	 	 	44,474	 	 	 	6,315	 	 	 	11,928	 	 	$	101,388.00	 
	Frederick L. Betz and
Cynthia A. Betz, JTWROS
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	RBC Dain Rauscher Cust
FBO Frederick L. Betz IRA
	 	 	—	 	 	 	—	 	 	 	9,500	 	 	$	80,750.00	 
	Charles Schwab & Co. Cust
FBO John A. Beyer IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Thomas M. Bies and
Edith C. Bies, JTWROS
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Gerry Black
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Brent G. Blackey
	 	 	—	 	 	 	—	 	 	 	5,900	 	 	$	50,150.00	 
	Pensco Trust Company Cust
FBO Michael J. Bogart IRA
	 	 	—	 	 	 	—	 	 	 	4,900	 	 	$	41,650.00	 
	William Bold
	 	 	—	 	 	 	—	 	 	 	3,600	 	 	$	30,600.00	 
	John R. Borrell
	 	 	—	 	 	 	—	 	 	 	11,764	 	 	$	99,994.00	 
	Robert Brady
	 	 	—	 	 	 	—	 	 	 	9,000	 	 	$	76,500.00	 
	Larry Brandt and Judy Brandt JTWROS
	 	 	8,943	 	 	 	1,270	 	 	 	4,120	 	 	$	35,020.00	 
	David Brink
	 	 	10,260	 	 	 	1,457	 	 	 	17,000	 	 	$	144,500.00	 
	Gerald F. Bubnick
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Brian P. Burns, Jr.
	 	 	—	 	 	 	—	 	 	 	7,500	 	 	$	63,750.00	 
	Marlyn and Margaret Buss, Trustees,
Marlyn and Margaret Buss Rev.
Living Trust dated 4/12/04
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Wedbush Morgan Securities Cust
FBO Richard E. Bye IRA
	 	 	—	 	 	 	—	 	 	 	7,050	 	 	$	59,925.00	 
	Timothy Byrne and Sandra Byrne,
Trustees, Byrne Family Trust
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Christopher Campbell
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 






2









 






	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	H. Daniel Caparo
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Charles Schwab & Co., Inc. Cust
FBO Franklin G. Capitanini IRA
	 	 	—	 	 	 	—	 	 	 	5,800	 	 	$	49,300.00	 
	Joseph Anthony Cardenas
	 	 	—	 	 	 	—	 	 	 	29,400	 	 	$	249,900.00	 
	Curtis L. Carlson Family Foundation
	 	 	43,783	 	 	 	6,217	 	 	 	29,414	 	 	$	250,019.00	 
	Charles Schwab & Co., Inc. Cust
FBO Steven W. Carter IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	CAVA Partners, LLC
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	John F. Cavanaugh
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Vijay T. Char
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Scott Chase
	 	 	—	 	 	 	—	 	 	 	17,647	 	 	$	150,000.00	 
	Richard J. Cherry and
JoAnn Cherry, JTWROS
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	George Jean Chilazi
	 	 	—	 	 	 	—	 	 	 	6,777	 	 	$	57,604.50	 
	Charles Schwab & Co., Inc. Cust
FBO Bruce A. Church IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Pershing LLC Custodian
FBO Walter Douglas Clark IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	David E. Cohen, M.D.
	 	 	—	 	 	 	—	 	 	 	5,884	 	 	$	50,014.00	 
	Sean Collins
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,002.50	 
	Wachovia Securities Cust
FBO Sean Collins IRA
	 	 	—	 	 	 	—	 	 	 	12,941	 	 	$	110,000.00	 
	Tom Correia
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Ralph D. Crawford
	 	 	—	 	 	 	—	 	 	 	11,750	 	 	$	99,875.00	 
	Carla C. Dahl
	 	 	—	 	 	 	—	 	 	 	590	 	 	$	5,015.00	 
	Thomas P. Davis, MD
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Keith Donnan
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Peter S. Dougan, M.D.
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Charles Schwab & Co., Inc. Cust
FBO Mark W. DuPont IRA
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Keith M. Eastman
	 	 	—	 	 	 	—	 	 	 	4,000	 	 	$	34,000.00	 
	Joane Evans and
Lyell Evans JTWROS
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Ryan E. Evans
	 	 	—	 	 	 	—	 	 	 	5,883	 	 	$	50,005.50	 
	Gary Jay Fishbein, MD
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Jeffrey Fleming
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	James Flynn
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Linda M. Foster
	 	 	17,890	 	 	 	2,540	 	 	 	2,404	 	 	$	20,434.00	 
	Michael D. Fugit, M.D.
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Michael Furlong
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Geoffrey T. Gainor
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Dennis R. Gancarz
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	GDN Holdings, LLC
	 	 	131,349	 	 	 	18,652	 	 	 	41,913	 	 	$	356,260.50	 
	Kenneth L. Gibbs, MD and
Beverly T. Gibbs JTWROS
	 	 	—	 	 	 	—	 	 	 	2,950	 	 	$	25,075.00	 
	Scott Kean Goodman
	 	 	—	 	 	 	—	 	 	 	19,059	 	 	$	162,001.50	 
	UBS Financial Services, Inc. Cust
FBO R. Hunt Greene IRA
	 	 	—	 	 	 	—	 	 	 	6,500	 	 	$	55,250.00	 






3









 






	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	Daniel Patrick Greenleaf and
Diane Francis Greenleaf
	 	 	—	 	 	 	—	 	 	 	10,000	 	 	$	85,000.00	 
	Barry K. Griffith
	 	 	—	 	 	 	—	 	 	 	18,750	 	 	$	159,375.00	 
	Edith Guglielmi
	 	 	—	 	 	 	—	 	 	 	7,060	 	 	$	60,010.00	 
	David J. Gunther
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Rob Hadley
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Fiserv ISS & Co. Cust
FBO Rob Hadley IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Scott Robert Hannum
	 	 	—	 	 	 	—	 	 	 	11,764	 	 	$	100,000.00	 
	Scott Merle Hanson
	 	 	—	 	 	 	—	 	 	 	600	 	 	$	5,100.00	 
	Steven J. Healy
	 	 	8,815	 	 	 	1,252	 	 	 	9,431	 	 	$	80,173.50	 
	Syntel, LLC Profit Sharing Plan FBO
Alfred Harry Herget, Alfred Harry
Herget, Trustee
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	49,997.00	 
	Richard R. Heuser and Sharon L.Heuser,
Trustees, R&S Trust dated 8/3/99
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Charles Schwab & Co., Inc. Cust
FBO David Richard Hewitt IRA
	 	 	—	 	 	 	—	 	 	 	13,000	 	 	$	110,500.00	 
	Robert C. Hinckle
	 	 	—	 	 	 	—	 	 	 	17,647	 	 	$	150,000.00	 
	William Hoffman and
Lilia Helen Hoffman JTWROS
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Jeremy Houseman
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Derek J. Howe
	 	 	—	 	 	 	—	 	 	 	8,000	 	 	$	68,000.00	 
	Wende S. Hutton, Trustee,
Hutton Living Trust dtd 12/10/96
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Innovasc, LLC
	 	 	—	 	 	 	—	 	 	 	4,500	 	 	$	38,250.00	 
	Michael Iovanni and
Linda Iovanni, JTWROS
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Andrew J.
Iseman and Shelly D. Iseman JTWROS 
	 	 	17,657	 	 	 	2,507	 	 	 	7,108	 	 	$	60,418.00	 
	
Sean Janzer
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,000.00	 
	Sara Jay
	 	 	—	 	 	 	—	 	 	 	5,900	 	 	$	50,150.00	 
	Takemito Jimbo
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,002.50	 
	Charles David Joffe, MD
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Darla R. Johnson and
John A. Beyer JTWROS
	 	 	—	 	 	 	—	 	 	 	3,529	 	 	$	30,000.00	 
	Elias H. Kassab
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Salva Kassab and
Suha Kassab JTWROS
	 	 	—	 	 	 	—	 	 	 	3,529	 	 	$	30,000.00	 
	KD Holding, Inc.
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Puneet K. Khanna and
Monica Khanna JTWROS
	 	 	—	 	 	 	—	 	 	 	17,647	 	 	$	150,000.00	 
	Yazan Khatib
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Farhad Khosravi, Ttee, Farhad Khosravi
and Flora Shirzad Khosravi Trust U/A
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Bertram W. Klein
	 	 	—	 	 	 	—	 	 	 	10,000	 	 	$	85,000.00	 
	E*Trade as Cust
FBO Joseph F. Koziol IRA
	 	 	—	 	 	 	—	 	 	 	5,883	 	 	$	50,005.50	 






4









 






	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	Al Kraus and
Eileen Kraus JTWROS
	 	 	—	 	 	 	—	 	 	 	8,825	 	 	$	75,012.50	 
	Al Kraus
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	David Kraus, M.D.
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Scott Kraus
	 	 	—	 	 	 	—	 	 	 	22,600	 	 	$	192,100.00	 
	John T. Kuzara
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Habib John Lahlouh
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	David Lamadrid
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Aaron Lew
	 	 	—	 	 	 	—	 	 	 	17,000	 	 	$	144,500.00	 
	MLPF&S Cust FBO Aaron Lew IRA
	 	 	—	 	 	 	—	 	 	 	23,529	 	 	$	199,996.50	 
	Robert Lindmeier and
Sheryl Lindmeier
	 	 	—	 	 	 	—	 	 	 	11,764	 	 	$	100,000.00	 
	William Andrew Lindmeier and
Susan J. Lindmeier JTWROS
	 	 	—	 	 	 	—	 	 	 	5,000	 	 	$	42,500.00	 
	Wells Fargo Bank, N.A. as Trustee of the
Donald M. Longlet Rev Trust
	 	 	—	 	 	 	—	 	 	 	11,764	 	 	$	99,994.00	 
	Louis Lopez, MD
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,000.00	 
	Richard A. Lotti
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Jonathan K. Lubkert
	 	 	—	 	 	 	—	 	 	 	600	 	 	$	5,100.00	 
	Kenneth H. Lubkert and
Elizabeth R. Lubkert JTWROS
	 	 	—	 	 	 	—	 	 	 	4,706	 	 	$	40,001.00	 
	Satyaprakash Makam
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Louis Manfredo and
Genevieve Manfredo JTWROS
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Carol A. Martin, Sole Trustee of the
Martin Family Revocable Trust
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Lynne Martin and
Tevis P. Martin III
	 	 	—	 	 	 	—	 	 	 	1,200	 	 	$	10,200.00	 
	MaxBee Holding Company LLC
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Gary McCord
	 	 	—	 	 	 	—	 	 	 	17,647	 	 	$	150,000.00	 
	Christopher W. McNeill
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	John J. Mehalchin
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,002.50	 
	Jacob P. Mercer
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Amir Motarjeme, Trustee of the Amir
Motarjeme Profit Sharing Plan FBO
Amir Motarjeme
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	49,997.00	 
	Padmini Natarajan and
B. R. Natarajan JTWROS
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Fiserv ISS & Co. Cust
FBO Thomas P. Neslund IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Thomas P. Neslund
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Hajime Oshita
	 	 	—	 	 	 	—	 	 	 	2,400	 	 	$	20,400.00	 
	Marco Ovikian and
Catherine Ovikian, JTWROS
	 	 	—	 	 	 	—	 	 	 	8,823	 	 	$	75,000.00	 
	Ashish Pal
	 	 	—	 	 	 	—	 	 	 	30,000	 	 	$	255,000.00	 
	Tom Pardubeck
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Daryl L. Peterman
	 	 	1,027	 	 	 	146	 	 	 	5,000	 	 	$	42,500.00	 
	Loyal M. Peterman, Jr.
	 	 	20,564	 	 	 	2,920	 	 	 	16,124	 	 	$	137,054.00	 
	John N. Phillips
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 






5









 






	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	Cassandra Piippo
	 	 	—	 	 	 	—	 	 	 	589	 	 	$	5,006.50	 
	Pinnacle Investment Group, LLC
	 	 	—	 	 	 	—	 	 	 	9,000	 	 	$	76,500.00	 
	Sridhar Prativadi
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Rolando E. Prieto
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	24,998.50	 
	Dave B. Radovich
	 	 	7,203	 	 	 	1,023	 	 	 	25,169	 	 	$	213,936.50	 
	Robert K. Ranum
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	24,998.50	 
	Ambika Ravindran
	 	 	—	 	 	 	—	 	 	 	12,000	 	 	$	102,000.00	 
	Redmile Capital, LP
	 	 	—	 	 	 	—	 	 	 	7,569	 	 	$	64,341.00	 
	Redmile Ventures, LLC
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	49,997.00	 
	Redmile Capital Offshore, Ltd.
	 	 	—	 	 	 	—	 	 	 	27,725	 	 	$	235,658.00	 
	Michael Reilly and Lisa Reilly
	 	 	—	 	 	 	—	 	 	 	11,764	 	 	$	99,994.00	 
	Ronald Reuss and
Rita Reuss JTWROS
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Stacey Rickert
	 	 	—	 	 	 	—	 	 	 	10,000	 	 	$	85,000.00	 
	Benjamin S. Rinkey
	 	 	—	 	 	 	—	 	 	 	4,000	 	 	$	34,000.00	 
	Caleb Rivera
	 	 	—	 	 	 	—	 	 	 	2,940	 	 	$	24,990.00	 
	Edward Todd Robbins
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Cecilia S.
Roberts, Trustee David K. Roberts Residuary Trust 
	 	 	—	 	 	 	—	 	 	 	21,200	 	 	$	180,200.00	 
	
David K. Roberts
	 	 	—	 	 	 	—	 	 	 	11,800	 	 	$	100,300.00	 
	Todd A. Roberts and
Debra D. Roberts
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Peter Lars Runquist
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Paul W. Schaffer
	 	 	10,216	 	 	 	1,451	 	 	 	20,000	 	 	$	170,000.00	 
	James W. Schlesing and
Dona Connelly
	 	 	—	 	 	 	—	 	 	 	7,059	 	 	$	60,001.50	 
	Marc S. Schwartzberg
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Gary M. Scott and Malisa M. Scott, Ttees
of the Gary and Malisa Scott Rev
Trust
	 	 	—	 	 	 	—	 	 	 	29,500	 	 	$	250,750.00	 
	R. Randolph Scott
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Gino J. Sedillo, MD
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	David Shaskey
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Pamela Shaw and
James Shaw JTWROS
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Neil J. Sheehan
	 	 	—	 	 	 	—	 	 	 	2,000	 	 	$	17,000.00	 
	Chiemsee Money Purchase Plan, dtd
03/11/97, FBO Robert T. Shepard
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Robert Shepard and Celia Shepard, Ttees
of the Shepard Family Trust dated
2/1/99
	 	 	—	 	 	 	—	 	 	 	6,000	 	 	$	51,000.00	 
	Harvinder Paul Singh, MD
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Kevin Spanier
	 	 	—	 	 	 	—	 	 	 	1,200	 	 	$	10,200.00	 
	Kathleen A. Stauter
	 	 	—	 	 	 	—	 	 	 	1,775	 	 	$	15,087.50	 
	Steven Mendelow, Trustee, Teledata
Financial Services Corp. Profit Shar Plan
	 	 	—	 	 	 	—	 	 	 	23,529	 	 	$	200,000.00	 
	Charles Schwab & Co., Inc. Cust
FBO Robert J. Thatcher IRA
	 	 	—	 	 	 	—	 	 	 	12,000	 	 	$	102,000.00	 
	Kimberley J. Thomas and
A. Conrade Thomas JTWROS
	 	 	—	 	 	 	—	 	 	 	5,890	 	 	$	50,065.00	 






6









 






	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 	 	Series A	 	Series A	 	Series A-1	 	 
	 	 	Preferred	 	Preferred	 	Preferred	 	Aggregate
	Name of Investor	 	Shares	 	Warrant	 	Shares	 	Purchase Price
	TMP, LLLP
	 	 	53,217	 	 	 	7,557	 	 	 	56,768	 	 	$	482,529.00	 
	Top Medical Holding B.V.
	 	 	—	 	 	 	—	 	 	 	4,000	 	 	$	34,000.00	 
	Leslie Trigg and Michael Trigg,
Trustees,
Trigg Family Trust
	 	 	—	 	 	 	—	 	 	 	2,942	 	 	$	25,007.00	 
	Edwin C. Tyska
	 	 	—	 	 	 	—	 	 	 	11,765	 	 	$	100,000.00	 
	Hector J. Vasquez and
Sandra L. Vasquez
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Greg Vella and Michelle Vella, Ttees,
Greg Vella and Michelle Vella Family
Tr
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Chris Vieira
	 	 	—	 	 	 	—	 	 	 	4,588	 	 	$	39,000.00	 
	Douglas A. Waldo, MD
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Joseph A. Wasselle and Stacie Poole
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	24,998.50	 
	Charles Schwab & Co., Inc. Cust
FBO Burton M. Waxman IRA
	 	 	—	 	 	 	—	 	 	 	7,058	 	 	$	60,000.00	 
	Wellspring Capital
	 	 	—	 	 	 	—	 	 	 	176,470	 	 	$	1,500,000.00	 
	Wellspring Management, LLC
	 	 	—	 	 	 	—	 	 	 	58,823	 	 	$	500,000.00	 
	Martin F. Whalen
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Fiserv ISS & Co. Cust
FBO Kimberly Williamson IRA
	 	 	—	 	 	 	—	 	 	 	5,882	 	 	$	50,000.00	 
	Steven Wishnia
	 	 	—	 	 	 	—	 	 	 	3,000	 	 	$	25,500.00	 
	Sharon T. Wooster
	 	 	—	 	 	 	—	 	 	 	2,941	 	 	$	25,000.00	 
	Total 
	 	 	4,002,644	 	 	 	568,374	 	 	 	2,188,425	 	 	$	18,601,821.50	 







	 	4.	 	This Amendment No. 2 may be executed in any number of original or facsimile
counterparts, and each such counterpart hereof shall be deemed to be an original
instrument, but all such counterparts together shall constitute but one agreement. Any
counterpart or other signature to this Amendment No. 2 that is delivered by facsimile shall
be deemed for all purposes as constituting good and valid execution and delivery by such
party of this Amendment No. 2.
	 
	 	5.	 	Except as set forth herein, all other terms and conditions of the Investor’s Rights
Agreement remain the same.





[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]




7









 








     IN WITNESS WHEREOF, the parties hereto have executed this Amendment No. 2 to Investor’s Rights
Agreement effective the date first written above.



	 	 	 	 	 
	 	CARDIOVASCULAR SYSTEMS, INC.

 	 
	 	By:  	/s/ James E. Flaherty
 	 
	 	 	Name:  	James E. Flaherty 	 
	 	 	Title:  	Chief Financial Officer 	 



8









 






	 	 	 	 	 




	     IN WITNESS WHEREOF, the parties hereto have executed this Amendment No. 2 to Investor’s Rights
Agreement effective the date first written above.





	 	 	 	 	 
	 	 	EASTON HUNT CAPITAL PARTNERS, L.P.
	 
	 	 	 	 
	 

	 	By:
	 	EHC GP, L.P. its General Partner
	 

	 	By:
	 	EHC GP, Inc., its General Partner
	 
	 	 	 	 
	 

	 	By:
	 	/s/ John H. Friedman
	 

	 	 	 	 
	 

	 	 	 	Name: John H. Friedman 

Title: President
	 
	 	 	 	 
	 	 	EASTON CAPITAL PARTNERS, LP
	 
	 	 	 	 
	 

	 	By:
	 	ECP GP, LLC
	 

	 	By:
	 	ECP GP, Inc., its Manager
	 
	 	 	 	 
	 

	 	By:
	 	/s/ John H. Friedman
	 

	 	 	 	 
	 

	 	 	 	Name: John H. Friedman
	 

	 	 	 	Title: President






9









 






     IN WITNESS WHEREOF, the parties hereto have executed this Amendment No. 2 to Investor’s
Rights Agreement effective the date first written above.



	 	 	 	 	 
	 	 	MAVERICK FUND, L.D.C.
	 
	 	 	 	 
	 

	 	By:
	 	Maverick Capital, Ltd.
	 

	 	 	 	Its Investment Advisor
	 
	 	 	 	 
	 

	 	By:
	 	/s/ John T. McCafferty
	 

	 	 	 	 
	 

	 	 	 	Name: John T. McCafferty
	 

	 	 	 	Title: Limited Partner and General Counsel
	 
	 	 	 	 
	 	 	MAVERICK FUND USA, LTD.
	 
	 	 	 	 
	 

	 	By:
	 	Maverick Capital, Ltd.
	 

	 	 	 	Its Investment Advisor
	 
	 	 	 	 
	 

	 	By:
	 	/s/ John T. McCafferty
	 

	 	 	 	 
	 

	 	 	 	Name: John T. McCafferty
	 

	 	 	 	Title: Limited Partner and General Counsel
	 
	 	 	 	 
	 	 	MAVERICK FUND II, LTD.
	 
	 	 	 	 
	 

	 	By:
	 	Maverick Capital, Ltd.
	 

	 	 	 	Its Investment Advisor
	 
	 	 	 	 
	 

	 	By:
	 	/s/ John T. McCafferty
	 

	 	 	 	 
	 

	 	 	 	Name: John T. McCafferty
	 

	 	 	 	Title: Limited Partner and General Counsel






10









 






     IN WITNESS WHEREOF, the parties hereto have executed this Amendment No. 2 to Investor’s Rights
Agreement effective the date first written above.



	 	 	 	 	 
	 

	 	MITSUI & CO. VENTURE PARTNERS II, L.P.
	 
	 	 	 	 
	 

	 	By:
	 	Mitsui & Co. Venture Partners, Inc.
	 

	 	 	 	Its General Partner
	 
	 	 	 	 
	 

	 	By:
	 	/s/ Koichi Ando
	 

	 	 	 	 
	 

	 	 	 	Name: Koichi Ando
	 

	 	 	 	Title: President & CEO






11









 






     IN WITNESS WHEREOF, the parties hereto have executed this Amendment No. 2 to Investor’s Rights
Agreement effective the date first written above.



	 	 	 	 	 
	 	SERIES A-1 CONVERTIBLE PREFERRED INVESTORS

 	 
	 	By:  	/s/ James E. Flaherty
 	 
	 	 	James E. Flaherty, as Attorney-in-Fact for the Series A-1 Convertible 	 
	 	 	Preferred Investors named on Exhibit A hereto 	 



12









 






	 	 	 	 	 



EXHIBIT A




SERIES A-1 CONVERTIBLE PREFERRED INVESTORS




	 
	Abrasive Technology, Inc.

Profit Sharing Plan

	Michael Adrian

	Mark R. Alvig

	Shahla Amiri

	Anthony Angelini

	Michael J. Antonello

	Massoud Arbabzadeh, MD

	Naoum Baladi

	Michael S. Barish

	Frederick L. Betz and

Cynthia A. Betz, JTWROS

	RBC Dain Rauscher Cust

FBO Frederick L. Betz IRA

	Charles Schwab & Co. Cust

FBO John A. Beyer IRA

	Thomas M. Bies and

Edith C. Bies, JTWROS

	Gerry Black

	Brent G. Blackey

	Pensco Trust Company Cust

FBO Michael J. Bogart IRA

	William Bold

	John R. Borrell

	Robert Brady

	Larry Brandt and

Judy Brandt JTWROS

	David Brink

	Gerald F. Bubnick

	Brian P. Burns, Jr.

	Marlyn and Margaret Buss,

Ttees, Marlyn and Margaret

Buss Rev. Living Trust

	Wedbush Morgan Securities

Cust FBO Richard E. Bye IRA

	Timothy Byrne and Sandra Byrne, Trustees,

	Byrne Family Trust

	Christopher Campbell

	H. Daniel Caparo

	Charles Schwab & Co., Inc. Cust

FBO Franklin G. Capitanini IRA

	Joseph Anthony Cardenas

	Curtis L. Carlson Family

Foundation

	Charles Schwab & Co., Inc.

Cust FBO Steven W. Carter IRA

	CAVA Partners, LLC

	John F. Cavanaugh

	Vijay T. Char

	Scott Chase

	Richard J. Cherry and

JoAnn Cherry, JTWROS

	George Jean Chilazi

	Charles Schwab & Co., Inc. Cust

FBO Bruce A. Church IRA

	Pershing LLC Custodian

FBO Walter Douglas Clark IRA

	David E. Cohen, M.D.

	Sean Collins

	Wachovia Securities Cust

FBO Sean Collins IRA

	Tom Correia

	Ralph D. Crawford

	Carla C. Dahl

	Thomas P. Davis, MD

	Keith Donnan

	Peter S. Dougan, M.D.

	Charles Schwab & Co., Inc. Cust

FBO Mark W. DuPont IRA

	Keith M. Eastman

	Joane Evans and

Lyell Evans JTWROS

	Ryan E. Evans

	Gary Jay Fishbein, MD

	Jeffrey Fleming

	James Flynn

	Linda M. Foster

	Michael D. Fugit, M.D.

	Michael Furlong

	Geoffrey T. Gainor

	Dennis R. Gancarz

	GDN Holdings, LLC

	Kenneth L. Gibbs, MD and

Beverly T. Gibbs JTWROS

	Scott Kean Goodman

	UBS Financial Services, Inc. Cust

FBO R. Hunt Greene IRA

	Daniel Patrick Greenleaf and

Diane Francis Greenleaf

	Barry K. Griffith

	Edith Guglielmi

	David J. Gunther

	Rob Hadley

	Fiserv ISS & Co. Cust

FBO Rob Hadley IRA

	Scott Robert Hannum

	Scott Merle Hanson

	Steven J. Healy

	Syntel, LLC Profit Sharing Plan

FBO Alfred Harry Herget, Alfred

Harry Herget, Trustee

	Richard R. Heuser and Sharon L.

Heuser, Trustees, R&S Trust

dated 8/3/99

	Charles Schwab & Co., Inc. Cust

FBO David Richard Hewitt IRA

	Robert C. Hinckle







13









 






	 
	William Hoffman and

Lilia Helen Hoffman JTWROS

	Jeremy Houseman

	Derek J. Howe

	Wende S. Hutton, Trustee,

Hutton Living Trust dtd 12/10/96

	Innovasc, LLC

	Michael Iovanni and

Linda Iovanni, JTWROS

	Andrew J. Iseman and

Shelly D. Iseman JTWROS

	ITX International Equity Corp.

	Sean Janzer

	Sara Jay

	Takemito Jimbo

	Charles David Joffe, MD

	Darla R. Johnson and

John A. Beyer JTWROS

	Elias H. Kassab

	Salva Kassab and

Suha Kassab JTWROS

	KD Holding, Inc.

	Puneet K. Khanna and

Monica Khanna JTWROS

	Yazan Khatib

	Farhad Khosravi, Ttee, Farhad Khosravi

and Flora Shirzad Khosravi Trust U/A

	Bertram W. Klein

	E*Trade as Cust

FBO Joseph F. Koziol IRA

	Al Kraus and

Eileen Kraus JTWROS

	Al Kraus

	David Kraus, M.D.

	Scott Kraus

	John T. Kuzara

	Habib John Lahlouh

	David Lamadrid

	Aaron Lew

	MLPF&S Cust FBO

Aaron Lew IRA

	Robert Lindmeier and

Sheryl Lindmeier

	William Andrew Lindmeier and

Susan J. Lindmeier JTWROS

	Wells Fargo Bank, N.A. as Trustee

of the Donald M. Longlet Rev Tr

	Louis Lopez, MD

	Richard A. Lotti

	Jonathan K. Lubkert

	Kenneth H. Lubkert and

Elizabeth R. Lubkert JTWROS

	Satyaprakash Makam

	Louis Manfredo and

Genevieve Manfredo JTWROS

	Carol A. Martin, Sole Trustee,

Martin Family Revocable Trust

	Lynne Martin and

Tevis P. Martin III

	Maverick Fund, L.D.C.

	Maverick Fund USA, Ltd.

	Maverick Fund II, Ltd.

	MaxBee Holding Company LLC

	Gary McCord

	Christopher W. McNeill

	John J. Mehalchin

	Jacob P. Mercer

	Mitsui & Co. Venture Partners II, LP

	Amir Motarjeme, Trustee, Amir

Motarjeme Profit Sharing Plan

FBO Amir Motarjeme

	Padmini Natarajan and

B. R. Natarajan JTWROS

	Fiserv ISS & Co. Cust

FBO Thomas P. Neslund IRA

	Thomas P. Neslund

	Hajime Oshita

	Marco Ovikian and

Catherine Ovikian, JTWROS

	Ashish Pal

	Tom Pardubeck

	Daryl L. Peterman

	Loyal M. Peterman, Jr.

	John N. Phillips

	Cassandra Piippo

	Pinnacle Investment Group, LLC

	Sridhar Prativadi

	Rolando E. Prieto

	Dave B. Radovich

	Robert K. Ranum

	Ambika Ravindran

	Redmile Capital, LP

	Redmile Ventures, LLC

	Redmile Capital Offshore, Ltd.

	Michael Reilly and Lisa Reilly

	Ronald Reuss and

Rita Reuss JTWROS

	Stacey Rickert

	Benjamin S. Rinkey

	Caleb Rivera

	Edward Todd Robbins

	Cecilia S. Roberts, Trustee

David K. Roberts Residuary Trust
	David K. Roberts

	Todd A. Roberts and

Debra D. Roberts

	Peter Lars Runquist

	Paul W. Schaffer

	James W. Schlesing and

Dona Connelly

	Marc S. Schwartzberg

	Gary M. Scott and Malisa M. Scott,

Ttees of the Gary and Malisa Scott

Rev Trust

	R. Randolph Scott







14









 






	 
	Gino J. Sedillo, MD

	David Shaskey

	Pamela Shaw and

James Shaw JTWROS

	Neil J. Sheehan

	Chiemsee Money Purchase Plan,

dtd 03/11/97, FBO Robert T.

Shepard

	Robert Shepard and Celia Shepard,

Ttees of the Shepard Family Trust

dated 2/1/99

	Harvinder Paul Singh, MD

	Kevin Spanier

	Kathleen A. Stauter

	Steven Mendelow, Trustee,

Teledata Financial Services Corp.

Profit Shar Plan

	Charles Schwab & Co., Inc. Cust

FBO Robert J. Thatcher IRA

	Kimberley J. Thomas and

A. Conrade Thomas JTWROS

	TMP, LLLP

	Top Medical Holding B.V.

	Leslie Trigg and Michael Trigg,

Trustees, Trigg Family Trust

	Edwin C. Tyska

	Hector J. Vasquez and

Sandra L. Vasquez

	Greg Vella and Michelle Vella,

Ttees, Greg Vella and Michelle

Vella Family Tr

	Chris Vieira

	Douglas A. Waldo, MD

	Joseph A. Wasselle and

Stacie Poole

	Charles Schwab & Co., Inc. Cust

FBO Burton M. Waxman IRA

	Wellspring Capital

	Wellspring Management, LLC

	Martin F. Whalen

	Fiserv ISS & Co. Cust

FBO Kimberly Williamson IRA

	Steven Wishnia

	Sharon T. Wooster








15