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 *
  Amoruso Leonard J
2. Date of Event Requiring Statement (Month/Day/Year)
05/10/2007
3. Issuer Name and Ticker or Trading Symbol
KNIGHT CAPITAL GROUP, INC. [NITE]
(Last)
(First)
(Middle)
KNIGHT CAPITAL GROUP, INC. 545 WASHINGTON BLVD.
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Sen.Man.Dir.& General Counsel
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

JERSEY CITY, NJ 07310
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)
Class A Common Stock 12,508
D
 
Restricted Class A Common Stock 48,168
D (1)
 

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
Stock Option (Right to Buy)   (2)   (2) Class A Common Stock 95,000 $ (2) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Amoruso Leonard J
KNIGHT CAPITAL GROUP
INC. 545 WASHINGTON BLVD.
JERSEY CITY, NJ 07310
      Sen.Man.Dir.& General Counsel  

Signatures

/s/ Leonard J. Amoruso 05/15/2007
**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) Restrictions lapse pursuant to the following schedule: 13,695 on 01/31/2008; 9,854 on 01/31/2009; 4,619 on 01/31/2010; 6,667 on 02/29/2008; 6,667 on 02/28/2009; and 6,666 on 02/28/2010.
(2) 20,000 vested options with an exercise price of $22.94 and expiration date of 10/19/2009; 50,000 vested options with an exercise price of $9.81 and expiration date of 01/31/2015; and 25,000 unvested options with a vesting date of 01/31/2008, exercise price of $9.81 and an expiration date of 01/31/2015.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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