13G Filing: Nexthera Capital and Catalyst Biosciences Inc. (CBIO)

Page 2 of 9 – SEC Filing

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Nexthera Capital LP
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a)    [  ]
(b)    [  ]
3.
SEC USE ONLY
4.
CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
5.
SOLE VOTING POWER
0
6.
SHARED VOTING POWER
311,175
7.
SOLE DISPOSITIVE POWER
0
8.
SHARED DISPOSITIVE POWER
311,175
9.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
311,175
10.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES    [ ]
11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
5.4%
12.
TYPE OF REPORTING PERSON
PN, IA

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