Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1147 (02-08) American LegalNet, Inc. www.FormsWorkFlow.com OMB APPROVAL OMB Number: 3235-0101 Expires: March 31, 2011 Estimated average burden hours per response 2.00 SEC USE ONLY DOCUMENT SEQUENCE NO. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933 ATTENTION: Transmit for filing 3 copies of this form concurrently with either placing an order with a broker to execute sale or executing a sale directly with a market maker. CUSIP NUMBER WORK LOCATION 1 (a) NAME OF ISSUER (Please type or print) TranS1 Inc. b) IRS IDENT. NO. 33-0909022 (c) S.E.C. FILE NO. 001-33744 1 (d) ADDRESS OF ISSUER (e) TELEPHONE NO. 301 Government Center Drive STREET CITY Wilmingtom STATE NC ZIP CODE 28403 AREA CODE 910 NUMBER 332-1700 2 (a) NAME OF PERSON FOR WHOSE ACCOUNT THE SECURITIES ARE TO BE SOLD Richard Randall (b) RELATIONSHIP TO ISSUER Director and CEO (c) ADDRESS STREET 310 Government Center Drive CITY Wilmington STATE NC ZIP CODE 28403 INSTRUCTION: The person filing this notice should contact the issuer to obtain the I.R.S. Identification Number and the S.E.C. File Number. 3 (a) SEC USE ONLY Title of the Class of Securities To Be Sold (b) Name and Address of Each Broker Through Whom the Securities are to be Offered or Each Market Maker who is Acquiring the Securities Broker-Dealer File Number (c) Number of Shares or Other Units To Be Sold (See instr. 3(c)) (d) Aggregate Market Value (See instr. 3(d)) (e) Number of Shares or Other Units Outstanding (See instr. 3(e)) (f) Approximate Date of Sale (See instr. 3(f)) (MO. DAY YR.) (g) Name of Each Securities Exchange (See instr. 3(g)) Common Stock 210-4 Avondale, Wilmington, NC 28403 6255 100,000 282,200.00 20,656,793 5/26/2010 through 8/26/2010 Nasdaq INSTRUCTIONS: 1. (a) Name of issuer (b) Issuer’s I.R.S. Identification Number

(c) Issuer’s S.E.C. file number, if any (d) Issuer’s address, including zip code (e) Issuer’s telephone number, including area code 2. (a) Name of person for whose account the securities are to be sold (b) Such person’s relationship to the issuer (e.g., officer, director, 10% stockholder, or member of immediate family of any of the foregoing) (c) Such person’s address, including zip code 3. (a) Title of the class of securities to be sold (b) Name and address of each broker through whom the securities are intended to be sold (c) Number of shares or other units to be sold (if debt securities, give the aggregate face amount) (d) Aggregate market value of the securities to be sold as of a specified date within 10 days prior to the filing of this notice (e) Number of shares or other units of the class outstanding, or if debt securities the face amount thereof outstanding, as shown by the most recent report or statement published by the issuer (f) Approximate date on which the securities are to be sold (g) Name of each securities exchange, if any, on which the securities are intended to be sold