SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under The Securities Exchange Act of 1934 (Amendment No. 1) KapStone Paper and Packaging Corporation (formerly known as Stone Arcade Acquisition Corporation) ------------------------------------------------------ (Name of Issuer) Common Stock, $0.0001 par value per share ------------------------------------------------------ (Title of Class of Securities) 861575108 ------------------------------------------------------ (CUSIP Number) December 31, 2006 ------------------------------------------------------ (Date of Event Which Requires Filing of this statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). Page 1 of 11 Pages CUSIP No. 861575108 13G/A Page 2 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS D.B. Zwirn & Co., L.P. 20-0597442 ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,930,000 Shares Warrants to purchase 220,000 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED 8.52% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 3 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS D.B. Zwirn Special Opportunities Fund, Ltd. ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands, British West Indies ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 940,238 Shares Warrants to purchase 140,800 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 940,238 Shares Warrants to purchase 140,800 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 940,238 Shares Warrants to purchase 140,800 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 4.30% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** CO ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 4 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS D.B. Zwirn Special Opportunities Fund, L.P. 73-1637217 ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 989,762 Shares Warrants to purchase 79,200 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 989,762 Shares Warrants to purchase 79,200 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 989,762 Shares Warrants to purchase 79,200 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 4.26% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** PN ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 5 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS DBZ GP, LLC 42-1657316 ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,930,000 Shares Warrants to purchase 220,000 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.52% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** OO ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 6 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS Zwirn Holdings, LLC 30-0080444 ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,930,000 Shares Warrants to purchase 220,000 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.52% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** OO ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 7 of 11 Pages ------------------------------------------------------------------------------- (1) NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS Daniel B. Zwirn ------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ** (a) [X] (b) [ ] ------------------------------------------------------------------------------- (3) SEC USE ONLY ------------------------------------------------------------------------------- (4) CITIZENSHIP OR PLACE OF ORGANIZATION United States ------------------------------------------------------------------------------- NUMBER OF (5) SOLE VOTING POWER 0 SHARES ________________________________________________________________ BENEFICIALLY (6) SHARED VOTING POWER 1,930,000 Shares Warrants to purchase 220,000 Shares OWNED BY ________________________________________________________________ EACH (7) SOLE DISPOSITIVE POWER 0 REPORTING ________________________________________________________________ PERSON WITH (8) SHARED DISPOSITIVE POWER 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,930,000 Shares Warrants to purchase 220,000 Shares ------------------------------------------------------------------------------- (10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ** [ ] ------------------------------------------------------------------------------- (11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 8.52% ------------------------------------------------------------------------------- (12) TYPE OF REPORTING PERSON ** IN ------------------------------------------------------------------------------- ** SEE INSTRUCTIONS BEFORE FILLING OUT! CUSIP No. 861575108 13G/A Page 8 of 11 Pages This Amendment No. 1 (this "Amendment") amends the statement on Schedule 13G filed on September 27, 2006 (as amended, the "Schedule 13G") with respect to warrants and shares of Common Stock, par value $0.0001 per share ("Common Stock") of KapStone Paper and Packaging Corporation, a Delaware corporation (the "Company") (the "Shares"). Capitalized terms used herein and not otherwise defined in this Amendment have the meanings set forth in the Schedule 13G. This Amendment amends and restates Items 2(a), 2(b), 2(c), 4, 5 and 8 in their entirety as set forth below. Item 2(a). Name of Person Filing Item 2(b). Address of Principal Business Office Item 2(c). Citizenship D.B. Zwirn & Co, L.P. 745 Fifth Avenue, 18th Floor New York, NY 10151 Citizenship: Delaware D.B. Zwirn Special Opportunities Fund, L.P. c/o D.B. Zwirn & Co., L.P. 745 Fifth Avenue, 18th Floor New York, NY 10151 Citizenship: Delaware D.B. Zwirn Special Opportunities Fund, Ltd. c/o Goldman Sachs (Cayman) Trust, Limited P.O. Box 896 George Town Harbour Centre, 2nd Floor Grand Cayman, Cayman Islands British West Indies Citizenship: Cayman Islands, British West Indies DBZ GP, LLC c/o D.B. Zwirn & Co., L.P. 745 Fifth Avenue, 18th Floor New York, NY 10151 Citizenship: Delaware Zwirn Holdings, LLC c/o D.B. Zwirn & Co., L.P. 745 Fifth Avenue, 18th Floor New York, NY 10151 Citizenship: Delaware Daniel B. Zwirn c/o D.B. Zwirn & Co., L.P. 745 Fifth Avenue, 18th Floor New York, NY 10151 Citizenship: United States Item 4. Ownership (a) Amount Beneficially Owned As of the date of this filing, D.B. Zwirn & Co., L.P., DBZ GP, LLC, Zwirn Holdings, LLC, and Daniel B. Zwirn may each be deemed the beneficial owner of (i) 989,762 Shares and warrants to purchase 79,200 Shares owned by D.B. Zwirn CUSIP No. 861575108 13G/A Page 9 of 11 Pages Special Opportunities Fund, L.P. and (ii) 940,238 Shares and warrants to purchase 140,800 Shares owned by D.B. Zwirn Special Opportunities Fund, Ltd. (each entity referred to in (i) through (ii) is herein referred to as a "Fund" and, collectively, as the "Funds"). D.B. Zwirn & Co., L.P. is the manager of each of the Funds, and consequently has voting control and investment discretion over the Shares and the warrants held by each of the Funds. Daniel B. Zwirn is the managing member of and thereby controls Zwirn Holdings, LLC, which in turn is the managing member of and thereby controls DBZ GP, LLC, which in turn is the general partner of and thereby controls D.B. Zwirn & Co., L.P. The foregoing should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of Shares and warrants owned by another Reporting Person. In addition, each of D.B. Zwirn & Co., L.P., DBZ GP, LLC, Zwirn Holdings, LLC, and Daniel B. Zwirn disclaims beneficial ownership of the Shares and the warrants held by the Funds. (b) Percent of Class Based upon the Issuer's Quarterly Report on form 10-Q/A filed on December 12, 2006, there were 25,000,000 Shares outstanding as of November 10, 2006. Therefore, (i) D.B. Zwirn Special Opportunities Fund, L.P. owns approximately 4.26% of the outstanding Shares, (ii) D.B. Zwirn Special Opportunities Fund, Ltd. owns approximately 4.30% of the outstanding Shares and (iii) each of D.B. Zwirn & Co., L.P., DBZ GP, LLC, Zwirn Holdings, LLC, and Daniel B. Zwirn may be deemed to beneficially own 8.52% of the outstanding Shares. In calculating the percentage of Shares held by the Reporting Persons, we assumed the exercise of the reported warrants. The foregoing should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of Shares and warrants owned by another Reporting Person. (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: See Item 4(a) (ii) Shared power to vote or to direct the vote See Item 4(a) (iii) Sole power to dispose or to direct the disposition of See Item 4(a) (iv) Shared power to dispose or to direct the disposition of See Item 4(a) Item 5. Ownership of Five Percent or Less of a Class Not applicable. Item 8. Identification and Classification of Members of the Group See Exhibit I of Schedule 13G filed on September 27, 2006 with respect to the Shares of the Company. Exhibits: Exhibit I: Power of attorney for Daniel B. Zwirn dated February 5, 2007. CUSIP No. 861575108 13G/A Page 10 of 11 Pages SIGNATURES After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information with respect to it set forth in this statement is true, complete, and correct. Dated: February 5, 2007 D.B. ZWIRN SPECIAL OPPORTUNITIES D.B. ZWIRN SPECIAL OPPORTUNITIES FUND, L.P. FUND, LTD. By: D.B. Zwirn & Co., L.P. By: D.B. Zwirn & Co., L.P. By: DBZ GP, LLC, By: DBZ GP, LLC, its General Partner its General Partner By: Zwirn Holdings, LLC, By: Zwirn Holdings, LLC, its Managing Member its Managing Member D.B. ZWIRN & CO., L.P. DBZ GP, LLC By: DBZ GP, LLC, By: Zwirn Holdings, LLC, its General Partner its Managing Member By: Zwirn Holdings, LLC, its Managing Member ZWIRN HOLDINGS, LLC By: /s/ Lawrence D. Cutler ---------------------------- Name: Lawrence D. Cutler Title: Authorized Signatory /s/ Lawrence D. Cutler -------------------------- LAWRENCE D. CUTLER, as Attorney-in-Fact for Daniel B. Zwirn CUSIP No. 861575108 13G/A Page 11 of 11 Pages EXHIBIT I POWER OF ATTORNEY The undersigned hereby appoints David C. Lee and Lawrence D. Cutler, or either of them, his true and lawful attorney-in fact and agent to execute and file with the Securities and Exchange Commission any Schedule 13D, Schedule 13G, any amendments thereto and any related documentation which may be required to be filed in his individual capacity as a result of the undersigned's beneficial ownership of, or participation in a group with respect to, securities directly or indirectly beneficially owned by D.B. Zwirn & Co, L.P. or any of its affiliates, and granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing which he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent may lawfully do or cause to be done by virtue hereof. The authority of David C. Lee and Lawrence D. Cutler, or either of them, under this Power of Attorney shall continue with respect to the undersigned until the undersigned is no longer required to file Schedule 13Ds or Schedule 13Gs unless revoked earlier in writing. Date: February 5, 2007 /s/ Daniel B. Zwirn -------------------------------- Daniel B. Zwirn