13D Filing: Matthew S Kaplan and Kapstone Paper & Packaging Corp (NYSE:KS)

CUSIP No.   48562P103

1.

Names of Reporting Persons.
Matthew Kaplan

2.

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)

 o

(b)

 x

3.

SEC Use Only

4.

Source of Funds (See Instructions):
OO

5.

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):
Not Applicable

6.

Citizenship or Place of Organization:
U.S.A.

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

7.

Sole Voting Power:
3,389,693

8.

Shared Voting Power:
504,172

9.

Sole Dispositive Power:
3,389,693

10.

Shared Dispositive Power:
504,172

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:
3,893,865 (1)

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):   o

13.

Percent of Class Represented by Amount in Row (11):
4.02% (2)

14.

Type of Reporting Person (See Instructions):
IN