July 9, 2024 Tom Shea Chief Executive Officer OneStream, Inc. 191 N. Chester Street Birmingham, Michigan 48009 Re: OneStream, Inc. Registration Statement on Form S-1 Filed June 28, 2024 File No. 333-280573 Dear Tom Shea: We have reviewed your registration statement and have the following comment. Please respond to this letter by amending your registration statement and providing the requested information. If you do not believe a comment applies to your facts and circumstances or do not believe an amendment is appropriate, please tell us why in your response. After reviewing any amendment to your registration statement and the information you provide in response to this letter, we may have additional comments. Registration Statement on Form S-1 Key Metrics, page 108 1. We note that you present Key Metrics and non-GAAP measures prior to your discussion of GAAP results and financial condition. Please revise MD&A to balance the presentation to discuss GAAP measures prior to your discussion of Key Metrics and Non-GAAP measures. See the Division's C&DI on non-GAAP financial measures, Question 102.10(a) for guidance. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Refer to Rules 460 and 461 regarding requests for acceleration. Please allow adequate time for us to review any amendment prior to the requested effective date of the registration statement. July 9, 2024 Page 2 Please contact Claire DeLabar at 202-551-3349 or Robert Littlepage at 202-551-3361 if you have questions regarding comments on the financial statements and related matters. Please contact Mariam Mansaray at 202-551-5176 or Matthew Derby at 202-551-3334 with any other questions. Sincerely, Division of Corporation Finance Office of Technology