13G Filing: Laurence W Lytton and Catalyst Biosciences Inc. (NASDAQ:CBIO)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G
Under the Securities Exchange Act of 1934(Name of Issuer) Catalyst Biosciences, Inc.

(Title of Class of Securities) Common Stock

(CUSIP Number) 14888D208
(Date of Event Which Requires Filing of this Statement) April 14, 2017

Check the appropriate box to designate the rule pursuant to which this
Schedule
is filed:
[ ]Rule 13d-1(b)
[ X ]Rule 13d-1(c)
[ ]Rule 13d-1(d)

CUSIP No. 14888D208

1.Names of Reporting Persons.

Laurence W.Lytton

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

a)………………………………………………………………..

(b)………………………………………………………………..

3.SEC Use Only

4.Citizenship or Place of Organization

USA

5.Sole Voting Power 220,500

6.Shared Voting Power

7.Sole Dispositive Power 220,500
8.Shared Dispositive Power

9.Aggregate Amount Beneficially Owned by Each Reporting
Person 220,500

10.Check if the Aggregate Amount in Row (9) Excludes Certain Shares
(See Instructions)……………………………

11.Percent of Class Represented by Amount in Row (9)
8.1%

12.Type of Reporting Person (See Instructions)

IN

Item 1.

(a)Name of Issuer Catalyst Biosciences, Inc.

(b)Address of Issuer’s Principal Executive Offices

260 Littlefield Ave.
South San Francisco, California