OneStream, Inc. Class A Ownership | Who Owns OneStream, Inc. Class A?
OneStream, Inc. Class A Ownership Summary
OneStream, Inc. Class A is owned by 15.12% institutional investors, 1.80% insiders, and 83.07% retail investors. T. rowe price investment management is the largest institutional shareholder, holding 5.26% of OS shares.
OS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | OneStream, Inc. Class A | 15.12% | 1.80% | 83.07% |
| Sector | Technology Stocks | 50.63% | 12.54% | 36.83% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| T. rowe price investment management | 9.38M | 5.26% | $172.92M |
| Vanguard group | 8.61M | 4.83% | $158.61M |
| Kayne anderson rudnick investment management | 6.21M | 3.48% | $114.49M |
| Temasek (private) | 4.27M | 2.39% | $78.64M |
| Darlington partners capital management, lp | 3.84M | 2.15% | $70.76M |
| Brown advisory | 3.65M | 2.04% | $67.20M |
| Champlain investment partners | 2.89M | 1.62% | $53.19M |
| Alliancebernstein | 2.66M | 1.49% | $49.02M |
| Timessquare capital management | 2.55M | 1.43% | $46.91M |
| Marshall wace, llp | 2.48M | 1.39% | $45.74M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Darlington partners capital management, lp | 3.84M | 2.39% | $70.76M |
| Annis gardner whiting capital advisors | 205.53K | 0.78% | $3.79M |
| Seven grand managers | 500.00K | 0.75% | $9.21M |
| Timessquare capital management | 2.55M | 0.67% | $46.91M |
| Whetstone capital advisors | 112.31K | 0.57% | $2.07M |
| 2xideas | 136.01K | 0.53% | $2.51M |
| Advantage alpha capital partners lp | 88.20K | 0.49% | $1.63M |
| Burkehill global management, lp | 400.00K | 0.42% | $7.37M |
| Champlain investment partners | 2.89M | 0.40% | $53.19M |
| West paces advisors | 85.22K | 0.31% | $1.57M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Temasek (private) | 4.27M | 0.27% | 1.31M |
| Wellington management group llp | 1.26M | 0.00% | 1.26M |
| Brown advisory | 3.65M | 0.09% | 1.04M |
| Vanguard group | 8.61M | 0.00% | 786.41K |
| Marshall wace, llp | 2.48M | 0.05% | 492.81K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Goldman sachs group | 662.89K | 0.00% | -2.96M |
| Invesco | - | - | -1.62M |
| Westfield capital management co lp | - | - | -1.06M |
| Champlain investment partners | 2.89M | 0.40% | -888.76K |
| Kayne anderson rudnick investment management | 6.21M | 0.28% | -663.13K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Wellington management group llp | 1.26M | 0.00% | 1.26M | $23.25M |
| Evergreen capital management | 346.81K | 0.15% | 346.81K | $6.39M |
| Armistice capital | 250.00K | 0.07% | 250.00K | $4.61M |
| Kornitzer capital management inc /ks | 245.60K | 0.09% | 245.60K | $4.53M |
| Winton group | 131.50K | 0.09% | 131.50K | $2.42M |
Sold Out
| Holder | Change |
|---|---|
| Golden state wealth management | -13.00 |
| Signaturefd | -26.00 |
| Mrp capital investments | -30.00 |
| True wealth design | -37.00 |
| Venturi wealth management | -89.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 80 | -58.12% | 26,967,156 | -69.04% | 15 | 0.63% | 43 | -69.72% | 25 | -19.35% |
| Jun 30, 2025 | 191 | 32.64% | 87,102,837 | 36.76% | 48 | 3.68% | 141 | 38.24% | 32 | 18.52% |
| Mar 31, 2025 | 3 | -98.15% | 4,311,499 | -91.84% | 2 | 0.24% | 2 | -98.40% | 1 | -95.65% |
| Dec 31, 2024 | 166 | 43.10% | 53,352,047 | -61.57% | 32 | 0.43% | 129 | 14.16% | 23 | - |
| Sep 30, 2024 | 116 | - | 138,824,782 | - | 86 | - | 113 | - | - | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Nov 17, 2025 | Hohenstein Ken | Chief Revenue Officer | Sell | $837.60K |
| Oct 16, 2025 | Hohenstein Ken | Chief Revenue Officer | Sell | $665.35K |
| Oct 16, 2025 | Hohenstein Ken | Chief Revenue Officer | Sell | $8.62K |
| Sep 19, 2025 | Kinzer John | - | Sell | $600.00K |
| Sep 16, 2025 | Hohenstein Ken | Chief Revenue Officer | Sell | $747.60K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | 3 |
| 2025 Q3 | - | 9 |
| 2025 Q2 | - | 15 |
| 2025 Q1 | - | 2 |
| 2024 Q4 | - | 26 |
OS Ownership FAQ
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