Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
MESDAG WILLEM
  2. Issuer Name and Ticker or Trading Symbol
Air Transport Services Group, Inc. [ATSG]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
10100 SANTA MONICA BOULEVARD, SUITE 925
3. Date of Earliest Transaction (Month/Day/Year)
05/26/2009
(Street)

LOS ANGELES, CA 90067
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock               3,176,148 I See footnote and Remarks below. (1)
Common Stock 05/26/2009   P   300,000 A $ 1.1926 (3) 4,100,368 (6) I See footnote and Remarks below. (2)
Common Stock 05/27/2009   P   283,873 A $ 1.3203 (4) 4,384,241 (6) I See footnote and Remarks below. (2)
Common Stock 05/28/2009   P   221,041 A $ 1.4239 (5) 4,605,282 (6) I See footnote and Remarks below. (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MESDAG WILLEM
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    
RED MOUNTAIN CAPITAL PARTNERS LLC
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    
RED MOUNTAIN CAPITAL MANAGEMENT INC
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    
RED MOUNTAIN CAPITAL PARTNERS II, L.P.
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    
RED MOUNTAIN CAPITAL PARTNERS III, L.P.
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    
RMCP GP LLC
10100 SANTA MONICA BOULEVARD
SUITE 925
LOS ANGELES, CA 90067
    X    

Signatures

 /s/ Willem Mesdag (on behalf of himself and the Red Mountain Entities)   05/28/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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) These shares are held directly by Red Mountain Capital Partners III, L.P. ("RMCP III").
(2) These shares are held directly by Red Mountain Capital Partners II, L.P. ("RMCP II").
(3) Weighted average price of shares acquired on May 26, 2009.
(4) Weighted average price of shares acquired on May 27, 2009.
(5) Weighted average price of shares acquired on May 28, 2009.
(6) After giving effect to all transactions reported in this Form 4, the aggregate amount of Common Stock held by RMCP II as of May 28, 2009, is 4,605,282 shares.
 
Remarks:
This Form 4 is jointly filed by (i) RMCP II, (ii) RMCP III, (iii) RMCP GP LLC ("RMCP GP"), (iv) Red Mountain Capital Partners LLC ("RMCP LLC"), (v) Red Mountain Capital Management, Inc. ("RMCM"), and (vi) Mr. Mesdag. RMCP GP is the general partner of each of RMCP II and RMCP III. RMCP LLC is the managing member of RMCP GP. RMCM is the managing member of RMCP LLC. Mr. Mesdag is the president, sole executive officer, sole director and sole shareholder of RMCM. Each of Mr. Mesdag, RMCM, RMCP LLC and RMCP GP, by virtue of their direct or indirect control of RMCP II and RMCP III, may be deemed to beneficially own some or all of the securities reported as being held by RMCP II and RMCP III. Each of the reporting persons hereunder disclaims beneficial ownership of the reported securities except to the extent of its or his pecuniary interest therein. In addition, RMCP II disclaims beneficial ownership of any securities held directly by RMCP III, and RMCP III disclaims beneficial ownership of any securities held directly by RMCP II. This Form 4 shall not be deemed to be an admission that any reporting person hereunder is the beneficial owner of any of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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