Ironwood Pharmaceuticals, Inc.
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(Name of Issuer)
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Class A Common Stock, $0.001 par value
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(Title of Class of Securities)
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46333X108
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(CUSIP Number)
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Mark DiPaolo
Senior Partner, General Counsel
Sarissa Capital Management LP
660 Steamboat Road
Greenwich, CT 06830
203-302-2330
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(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications) |
February 26, 2021
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(Date of Event which Requires Filing of this Statement)
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CUSIP No. 46333X108
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Page 2 of 6 Pages
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1
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NAME OF REPORTING PERSON OR
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Sarissa Capital Management LP |
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
|
(a) ☐
(b) ☐
|
||
3
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SEC USE ONLY
|
|||
4
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SOURCE OF FUNDS
WC |
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5
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CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)
|
☐
|
||
6
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CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware |
|||
NUMBER OF
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH |
7
|
SOLE VOTING POWER
0 |
||
8
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SHARED VOTING POWER
14,890,000 |
|||
9
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SOLE DISPOSITIVE POWER
0 |
|||
10
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SHARED DISPOSITIVE POWER
14,890,000 |
|||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
14,890,000 |
|||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:
|
☐
|
||
13
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
9.3%1 |
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14
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TYPE OF REPORTING PERSON
PN
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CUSIP No. 46333X108
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Page 3 of 6 Pages
|
1
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NAME OF REPORTING PERSON OR
I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Alexander J. Denner, Ph.D. |
|||
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
|
(a)☐
(b)☐
|
||
3
|
SEC USE ONLY
|
|||
4
|
SOURCE OF FUNDS
WC |
|||
5
|
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)
|
☐
|
||
6
|
CITIZENSHIP OR PLACE OF ORGANIZATION
United States |
|||
NUMBER OF
SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH |
7
|
SOLE VOTING POWER
37,8442 |
||
8
|
SHARED VOTING POWER
14,890,000 |
|||
9
|
SOLE DISPOSITIVE POWER
37,8443 |
|||
10
|
SHARED DISPOSITIVE POWER
14,890,000 |
|||
11
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
14,927,844 |
|||
12
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:
|
☐
|
||
13
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
9.3%4 |
|||
14
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TYPE OF REPORTING PERSON
IN
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CUSIP No. 46333X108
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Page 4 of 6 Pages
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CUSIP No. 46333X108
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Page 5 of 6 Pages
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CUSIP No. 46333X108
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Page 6 of 6 Pages
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By:
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/s/ Mark DiPaolo
|
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Name: Mark DiPaolo
|
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Title: Senior Partner, General Counsel
|
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By: /s/ Alexander J. Denner, Ph.D.
|
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Alexander J. Denner, Ph.D.
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