OneStream, Inc. (OS) Insider Ownership

Historic Ownership Trends

Data spanning the past 90 days through December 17, 2025 reveals that OneStream's three principal insider shareholders consist of Chief Revenue Officer Ken Hohenstein (990.96K shares), CEO And President Thomas Anthony Shea (469.24K shares), Chief Financial Officer William A Koefoed (206.13K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Ken Hohenstein Chief Revenue Officer 990,961 12 Dec, 2025
Thomas Anthony Shea CEO And President 469,244 12 Dec, 2025
Craig Colby 388,010 12 Jun, 2025
William A Koefoed Chief Financial Officer 206,127 16 Dec, 2025
John Kinzer 101,737 04 Dec, 2025
Baskar Sridharan 21,609 07 Oct, 2025
Jonathan D Mariner 15,086 04 Dec, 2025
Michael Burkland 7,130 22 May, 2025
Kara Wilson 7,130 22 May, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
15 Dec, 2025 William A Koefoed Class A Common Stock D 9,571 $17.73 206,127 D S
10 Dec, 2025 Ken Hohenstein Class A Common Stock D 6,101 $18.38 990,961 D F
10 Dec, 2025 Thomas Anthony Shea Class A Common Stock D 13,805 $18.38 469,244 D F
10 Dec, 2025 William A Koefoed Class A Common Stock D 6,285 $18.38 215,698 D F
02 Dec, 2025 John Kinzer Class A Common Stock A 94,607 $0.00 101,737 D A
02 Dec, 2025 Jonathan D Mariner Class A Common Stock D 18,423 $20.90 15,086 D S
17 Nov, 2025 Ken Hohenstein Class A Common Stock A 40,000 $10.65 1,037,062 D M
17 Nov, 2025 Ken Hohenstein Class A Common Stock D 40,000 $20.94 997,062 D S
16 Oct, 2025 Ken Hohenstein Class A Common Stock A 40,000 $10.65 1,037,062 D M
16 Oct, 2025 Ken Hohenstein Class A Common Stock D 39,510 $16.84 997,552 D S
16 Oct, 2025 Ken Hohenstein Class A Common Stock D 490 $17.59 997,062 D S
03 Oct, 2025 Baskar Sridharan Class A Common Stock A 21,609 $0.00 21,609 D A
18 Sep, 2025 John Kinzer Class A Common Stock A 30,000 - 30,000 I C
19 Sep, 2025 John Kinzer Class A Common Stock D 30,000 $20.00 0 I S
16 Sep, 2025 Ken Hohenstein Class A Common Stock A 40,000 $10.65 1,037,062 D M
16 Sep, 2025 Ken Hohenstein Class A Common Stock D 40,000 $18.69 997,062 D S
15 Sep, 2025 William A Koefoed Class A Common Stock D 8,943 $19.03 221,983 D S
10 Sep, 2025 Ken Hohenstein Class A Common Stock D 6,101 $19.79 997,062 D F
10 Sep, 2025 Thomas Anthony Shea Class A Common Stock D 13,805 $19.79 483,049 D F
10 Sep, 2025 William A Koefoed Class A Common Stock D 6,913 $19.79 230,926 D F