Onestream, INC Schedule 13G passive stakes

Darlington Partners Capital Management and associated entities have filed a Schedule 13G indicating zero beneficial ownership in OneStream, Inc. as of March 31, 2026.

Kayne Anderson Rudnick Investment Management, LLC has filed a Schedule 13G, reporting no beneficial ownership of OneStream Inc. common stock as of March 31, 2026.

Norges Bank has reported beneficial ownership of 181,642 shares, representing 0.1820% of OneStream, Inc.'s common stock as of March 31, 2026.

The Vanguard Group has reported a 0% beneficial ownership in Onestream Inc. following an internal realignment, disaggregating its reporting from certain subsidiaries.

T. Rowe Price Investment Management, Inc. has filed an amended Schedule 13G, reporting an 8.6% beneficial ownership stake in ONESTREAM INC.

Thomas Anthony Shea, a key insider, has reported beneficial ownership of 16.3% of OneStream, Inc.'s Class A Common Stock.

Kayne Anderson Rudnick Investment Management, LLC has reported a 5.4% beneficial ownership stake in OneStream Inc., holding 4,867,687 Class A Ordinary Shares.

Champlain Investment Partners, LLC reported a 3.3% beneficial ownership stake in OneStream, Inc. common stock as of September 30, 2025.

Glazer Capital, LLC and Paul J. Glazer have reported a 6.83% passive ownership stake in OneStream, Inc., holding 6,166,406 shares of Class A common stock.

Norges Bank, the central bank of Norway, has reported a 6.6% beneficial ownership stake in Onestream Inc, holding 5,974,029 shares of common stock.

Kayne Anderson Rudnick Investment Management, LLC and affiliates reported a 7.0% beneficial ownership in OneStream Inc. Class A shares.

Norges Bank, acting on behalf of the Government of Norway, has reported a 9.7% beneficial ownership stake in Onestream Inc.

Norges Bank, the central bank of Norway, has reported a significant passive ownership stake of 8.4% in Onestream Inc., holding over 6.3 million shares of common stock.

The Vanguard Group has filed an amended Schedule 13G, reporting a beneficial ownership of 10.37% of Onestream Inc.'s common stock as of June 30, 2025.

Craig Colby, a key individual, has disclosed a 10.9% beneficial ownership stake in OneStream, Inc., primarily through Class A and convertible Class D common stock.

AllianceBernstein L.P. has filed an amended Schedule 13G, disclosing a 3.9% beneficial ownership stake in Onestream Inc. as of March 31, 2025.

Alkeon Capital Management LLC and its founder, Panayotis D. Sparaggis, have filed an amended Schedule 13G, reporting a passive beneficial ownership of 3.5% in OneStream, Inc.'s Class A Common Stock.

Kayne Anderson Rudnick Investment Management, LLC, along with affiliates Virtus Investment Advisers, LLC and Virtus Equity Trust, have disclosed beneficial ownership exceeding 5% in OneStream, Inc.'s common stock.

Champlain Investment Partners, LLC has filed a Schedule 13G, reporting a beneficial ownership of 5.5% of OneStream, Inc.'s Common Stock.

The Vanguard Group has filed an amended Schedule 13G, disclosing a reduction in its beneficial ownership of Onestream Inc.'s common stock to 4.91%.

Darlington Partners Capital Management and its affiliates have disclosed a 5.3% beneficial ownership stake in OneStream, Inc.'s Class A Common Stock, totaling 3,839,405 shares.

T. Rowe Price Investment Management, Inc. has filed an amended Schedule 13G, disclosing a beneficial ownership of 8.3% in ONESTREAM INC as of December 31, 2024.

William A. Koefoed has filed an amended Schedule 13G, disclosing beneficial ownership of 3.8% of OneStream, Inc.'s Class A common stock as of December 31, 2024.

Champlain Investment Partners, LLC has filed a Schedule 13G, revealing a beneficial ownership of 7.6% of OneStream, Inc.'s Common Stock as of December 31, 2024.

An amended Schedule 13G filing reveals that various KKR entities collectively hold a 67.5% beneficial ownership stake in OneStream, Inc.'s Class A Common Stock as of December 31, 2024.

T. Rowe Price Investment Management, Inc. has filed an amended Schedule 13G, disclosing a beneficial ownership of 11.4% in OneStream Inc.'s common stock as of January 31, 2025.

AllianceBernstein L.P. has disclosed a 5.4% beneficial ownership stake in Onestream Inc. as of December 31, 2024, held for investment purposes on behalf of client accounts.