Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Miller Adam W
2. Date of Event Requiring Statement (Month/Day/Year)
02/08/2011
3. Issuer Name and Ticker or Trading Symbol
KNIGHT TRANSPORTATION INC [KNX]
(Last)
(First)
(Middle)
5601 WEST BUCKEYE ROAD
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sr. VP, Secretary, Treasurer
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PHOENIX, AZ 85043
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 810
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) 08/07/2010(1) 08/06/2013 Common Stock 788 (1) $ 11.4356 (1) D  
Employee Stock Option (right to buy) 03/19/2010(2) 03/18/2014 Common Stock 1,125 (2) $ 10.5378 (2) D  
Employee Stock Option (right to buy) 04/26/2010(3) 04/25/2015 Common Stock 1,125 (3) $ 14.48 (3) D  
Employee Stock Option (right to buy) 05/18/2010(4) 05/17/2016 Common Stock 1,500 (4) $ 18.75 (4) D  
Employee Stock Option (right to buy) 05/19/2010(5) 05/18/2016 Common Stock 1,000 (5) $ 18.77 (5) D  
Employee Stock Option (right to buy) 05/25/2010(6) 05/24/2017 Common Stock 2,500 (6) $ 18.2 (6) D  
Employee Stock Option (right to buy) 02/28/2011(7) 02/27/2018 Common Stock 5,335 (7) $ 14.79 (7) D  
Employee Stock Option (right to buy) 05/22/2011(8) 05/21/2018 Common Stock 5,000 (8) $ 17.29 (8) D  
Restricted Stock Unit   (9)   (9) Common Stock 20,000 $ (9) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Miller Adam W
5601 WEST BUCKEYE ROAD
PHOENIX, AZ 85043
      Sr. VP, Secretary, Treasurer  

Signatures

/s/ Adam W. Miller 02/18/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Mr. Miller was granted an option to purchase 788 shares of stock at the grant price of $11.4356 per share on August 7, 2003 of which 630 shares have been exercised and 158 are vested and exercisable.
(2) Mr. Miller was granted an option to purchase 1,125 shares of stock at the grant price of $10.5378 per share on March 19, 2004 of which 675 shares have been exercised and 225 are currently vested and exercisable with the remaining shares vesting as follows: 225 shares on March 19, 2011.
(3) Mr. Miller was granted an option to purchase 1,125 shares of stock at the grant price of $14.48 per share on April 26, 2005 of which 450 shares have been exercised and 225 shares are currently vested and exercisable with the remaining shares vesting as follows: 225 shares annually, with the next scheduled vesting on April 26, 2011, and each anniversary thereafter, until fully vested.
(4) Mr. Miller was granted an option to purchase 1,500 shares of stock at the grant price of $18.75 per share on May 18, 2006 of which 600 shares are currently vested and exercisable and zero have been exercised with the remaining shares vesting as follows: 300 shares annually, with the next scheduled vesting on May 18, 2011, and each anniversary thereafter, until fully vested.
(5) Mr. Miller was granted an option to purchase 1,000 shares of stock at the grant price of $18.77 per share on May 19, 2006 of which 400 shares are currently vested and exercisable with the remaining shares vesting as follows: 200 shares annually, with the next scheduled vesting on May 19, 2011, and each anniversary thereafter, until fully vested.
(6) Mr. Miller was granted an option to purchase 2,500 shares of stock at the grant price of $18.20 per share on May 25, 2007 of which 500 shares are currently vested and exercisable with the remaining shares vesting as follows: 500 shares annually, with the next scheduled vesting on May 25, 2011, and each anniversary thereafter, until fully vested.
(7) Mr. Miller was granted an option to purchase 5,335 shares of stock at the grant price of $14.79 per share on February 29, 2008, to vest as follows: 1,067 shares annually, with the next scheduled vesting on February 28, 2011, and each anniversary thereafter, until fully vested.
(8) Mr. Miller was granted an option to purchase 5,000 shares at the grant price of $17.29 per share on May 22, 2008, to vest as follows: 20% each year beginning on May 22, 2011, and each anniversary thereafter, until fully vested.
(9) On October 30, 2009, Mr. Miller was granted 20,000 Restricted Stock Units, with a vesting schedule as follows: six percent (6%) on January 31, 2011; five percent (5%) respectively on January 31, 2012, January 31, 2013, January 31, 2014 and January 31, 2015; six (6%) percent on January 31, 2016; seven (7%) percent on January 31, 2017; eight (8%) on January 31, 2018; nine (9%) percent on January 31, 2019; ten percent (10%) on January 31, 2020; eleven (11%) percent on January 31, 2021; twelve percent (12%) on January 31, 2022; and eleven percent (11%) on January 31, 2023. Stock is issued when and as vested. Each restricted stock unit represents a contingent right to receive one share of KNX common stock.

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