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

Page 4 of 6 – SEC Filing

CUSIP No. 14888D208
Page 4 of 6
Item 3.  If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 73c).
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C.78c).
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
(e)
An investment adviser in accordance with §13d-1(b)(1)(ii)(E).
(f)
An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F).
(g)
A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G).
(h)
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813).
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3).
(j)
Group, in accordance with §240.13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to §240.13d-1(c), check this box.
Item 4.
Ownership.
(a) through (c):
The information set forth in Items 5 through 9 and 11 of the cover pages to this Schedule 13G is incorporated herein by reference. 3

Item 5.
Ownership of Five Percent or Less of a Class.
Not Applicable.
Item 6.
Ownership of More than Five Percent on Behalf of Another Person.
Various advisory clients of the Reporting Person have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the common stock of Catalyst Biosciences, Inc in their accounts with the Reporting Person.  No such person has such interest relating to more than 5% of the outstanding shares of common stock of Catalyst Biosciences, Inc.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported By the Parent Holding Company.
Not Applicable.
_____________________________
3 Sio and Sio GP, LLC (the “GP”) act as investment advisor and general partner, respectively, to various clients that are the record owners of the Common Stock reported on this Schedule 13G.  Because Sio’s investment discretion with respect to such clients is subject to oversight by the GP, the GP may be deemed to be the beneficial owner of the Common Stock of the Issuer owned by such clients.  In addition, both Sio and the GP are controlled by Michael Castor.  As such, he may be deemed to control the voting and dispositive decisions with respect to, and therefore be the beneficial owner of, the shares of Common Stock reported on this Schedule 13G.  Neither the filing of this Schedule 13G nor any of its contents shall be deemed to constitute an admission by the GP or Michael Castor that such person is the beneficial owner of any of the equity securities referred to herein for purposes of Section 13(d) of the Exchange Act, or for any other purpose, and such beneficial ownership is expressly disclaimed.

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