Ladenburg Thalmann & Co. Inc.
999 Vanderbilt Beach Road, Suite 200
Naples, Florida 34108
June 19, 2018
VIA FACSIMILE AND EDGAR
U.S. Securities and Exchange Commission
Division of Corporation Finance
Washington, DC 20549
Re: INVIVO THERAPEUTICS HOLDINGS CORP.
Registration Statement on Form S-1 (Registration No. 333-224424
Concurrence in Acceleration Request
Ladies and Gentlemen:
Ladenburg Thalmann & Co. Inc. (“Ladenburg”), as representative of the underwriters for the above-referenced offering, hereby concurs in the request by InVivo Therapeutics Holdings Corp. that the effective date of the above-referenced registration statement be accelerated to 4:30 p.m. (Eastern Time), or as soon as practicable thereafter, on June 20, 2018, pursuant to Rule 461 under the Securities Act. Ladenburg affirms that it is aware of its obligations under the Securities Act in connection with this offering.
| Very truly yours, | |
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| LADENBURG THALMANN & CO. INC. | |
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| By: | /s/ David Rosenberg |
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| Name: David Rosenberg |
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| Title: Chief Executive Officer |
