CUSIP
No. 45337C102
|
13D
|
1.
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Julian
C. Baker
|
||
2.
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a) p
(b) p
|
||
3.
|
SEC
USE ONLY
|
||
4.
|
SOURCE
OF FUNDS*
WC
|
||
5.
|
CHECK
BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d)
or 2(e) o
|
||
6.
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
United
States
|
||
NUMBER
OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
|
7.
|
SOLE
VOTING POWER: 137,917
|
|
8.
|
SHARED
VOTING POWER: 26,179,994
|
||
9.
|
SOLE
DISPOSITIVE POWER: 137,917
|
||
10.
|
SHARED
DISPOSITIVE POWER: 26,179,994
|
||
11.
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
26,317,911
|
||
12.
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See
Instructions)
p
|
||
13.
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
19.999%(1)
|
||
14.
|
TYPE
OF REPORTING PERSON (See Instructions)
IN
|
CUSIP
No. 45337C102
|
13D
|
1.
|
NAMES
OF REPORTING PERSONS
I.R.S.
IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Felix
J. Baker
|
||
2.
|
CHECK
THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a) p
(b) p
|
||
3.
|
SEC
USE ONLY
|
||
4.
|
SOURCE
OF FUNDS (See Instructions)
WC
|
||
5.
|
CHECK
BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d)
or 2(e)
o
|
||
6.
|
CITIZENSHIP
OR PLACE OF ORGANIZATION
United
States
|
||
NUMBER
OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
|
7.
|
SOLE
VOTING POWER: 0
|
|
8.
|
SHARED
VOTING POWER: 26,179,994
|
||
9.
|
SOLE
DISPOSITIVE POWER: 0
|
||
10.
|
SHARED
DISPOSITIVE POWER: 26,179,994
|
||
11.
|
AGGREGATE
AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON:
26,179,994
|
||
12.
|
CHECK
BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See
Instructions)
p
|
||
13.
|
PERCENT
OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
19.999%(1)
|
||
14.
|
TYPE
OF REPORTING PERSON (See Instructions)
IN
|
CUSIP
No. 45337C102
|
13D
|
Reporting Person
|
Number of Shares
|
Percentage of Class
Outstanding
|
Baker
Bros. Investments, L.P.
|
144,314
|
0.1%
|
Baker
Bros. Investments II, L.P.
|
161,547
|
0.1%
|
667,
L.P.
|
6,857,501
|
5.0%
|
Baker
Brothers Life Sciences, L.P.
|
23,130,957
|
16.9%
|
14159,
L.P.
|
678,481
|
0.5%
|
Baker/
Tisch Investments, L.P.
|
423,849
|
0.3%
|
FBB
Associates
|
33,410
|
0.0%
|
Julian
Baker
|
137,917
|
0.1%
|
CUSIP
No. 45337C102
|
13D
|
Exhibit
1:
|
Letter
Agreement dated September 24, 2009 with respect to the 4.75% Convertible
Senior Notes Due 2015, by and among Baker Bros. Investments II, L.P., 667,
L.P., Baker Brothers Life Sciences, L.P., 14159, L.P., Baker/ Tisch
Investments, L.P. and Incyte Corporation
|
Exhibit
2:
|
Joint
Filing Agreement dated October 1, 2009 with respect to Amendment
No. 11 to Schedule 13D, by and between Julian C. Baker and Felix J.
Baker
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CUSIP
No. 45337C102
|
13D
|