OneStream, Inc. - Onestream Ord Shs Class A (OS)

Historical Holders from Q3 2024 to Q4 2025

Type / Class
Equity / Onestream Ord Shs Class A
Symbol
OS on Nasdaq
Shares outstanding
88,742,571
Price per share
$18.38
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares as of 30 Sep 2025
78,684,331
Holdings value
$1,450,162,850
% of all portfolios
0%
Share change
-8,046,248
Value change
-$247,394,073
Average buys %
+0%
Average sells %
-0%
Number of holders
180
Price from insider filings
$23.59
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of OneStream, Inc. - Onestream Ord Shs Class A (OS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
KKR Dream Holdings LLC 68% $2,012,335,739 94,520,232 KKR Group Partnership L.P. 31 Dec 2024
Colby Craig 11% $194,351,364 9,128,763 Craig Colby 31 Mar 2025
NORGES BANK 9.7% +16% $157,277,400 +$40,364,999 8,533,771 +35% Norges Bank 30 Sep 2025
VANGUARD GROUP INC 10% +109% $220,038,788 +$118,975,301 7,819,431 +118% The Vanguard Group 30 Jun 2025
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 7% -18% $114,486,791 +$309,624 6,211,980 +0.27% Kayne Anderson Rudnick Investment Management, LLC 30 Sep 2025
T. Rowe Price Investment Management, Inc. 11% +39% $110,436,680 +$29,854,818 5,187,256 +37% T. Rowe Price Investment Management, Inc. 31 Jan 2025
Champlain Investment Partners, LLC 5.5% -26% $85,960,398 +$12,747,537 4,037,595 +17% Champlain Investment Partners, LLC 14 May 2025
DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP 5.3% $81,740,932 3,839,405 Darlington Partners Capital Management, LP 11 Mar 2025
ALLIANCEBERNSTEIN L.P. 3.9% -30% $60,618,591 +$8,124,285 2,847,280 +15% AllianceBernstein L.P. 31 Mar 2025
ALKEON CAPITAL MANAGEMENT LLC 3.5% $53,784,097 2,526,261 Alkeon Capital Management LLC 31 Mar 2025
Koefoed William A 3.8% $43,673,965 2,051,384 William A. Koefoed 31 Dec 2024
As of 30 Sep 2025, OneStream, Inc. - Onestream Ord Shs Class A (OS) has 180 institutional shareholders filing 13F forms. They hold 78,684,331 shares of 88,742,571 outstanding shares (89%) .

Top 25 institutional shareholders own 71% of the company.

Filer Ownership Nb Shares Share Change % Portfolio % Holdings Value
T. Rowe Price Investment Management, Inc. 11% 9,382,724 +4% 0.11% $172,924,000
VANGUARD GROUP INC 9.7% 8,605,839 +10% 0% $158,605,614
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 7% 6,211,980 -9.6% 0.28% $114,486,791
Temasek Holdings (Private) Ltd 4.8% 4,266,714 +44% 0.27% $78,635,539
DARLINGTON PARTNERS CAPITAL MANAGEMENT, LP 4.3% 3,839,405 0% 2.4% $70,760,234
BROWN ADVISORY INC 4.1% 3,645,975 +40% 0.09% $67,195,317
Champlain Investment Partners, LLC 3.3% 2,886,232 -24% 0.4% $53,193,256
ALLIANCEBERNSTEIN L.P. 3% 2,659,712 +13% 0.02% $49,018,492
TimesSquare Capital Management, LLC 2.9% 2,545,548 -4.5% 0.67% $46,914,450
MARSHALL WACE, LLP 2.8% 2,481,917 +25% 0.05% $45,741,731
BlackRock, Inc. 2.4% 2,102,778 +2.6% 0% $38,754,198
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 1.6% 1,423,868 +34% 0.01% $26,241,887
NEUBERGER BERMAN GROUP LLC 1.5% 1,328,066 -14% 0.02% $24,476,257
WASATCH ADVISORS LP 1.5% 1,293,252 +2% 0.13% $23,834,634
WELLINGTON MANAGEMENT GROUP LLP 1.4% 1,261,552 0% $23,250,404
ROYAL BANK OF CANADA 1.3% 1,196,579 +18% 0% $22,053,000
MORGAN STANLEY 1.3% 1,146,709 +22% 0% $21,133,848
AMERICAN CENTURY COMPANIES INC 1.3% 1,146,236 -31% 0.01% $21,125,128
GEODE CAPITAL MANAGEMENT, LLC 1.2% 1,026,175 +8.4% 0% $18,917,571
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 1.1% 950,000 0% 0.03% $17,508,500
FEDERATED HERMES, INC. 0.96% 850,000 0% 0.03% $15,665,500
ALKEON CAPITAL MANAGEMENT LLC 0.9% 800,000 -16% 0.07% $14,744,000
STATE STREET CORP 0.81% 720,050 +7.6% 0% $13,270,522
MILLENNIUM MANAGEMENT LLC 0.79% 703,776 -11% 0.01% $12,970,592
GOLDMAN SACHS GROUP INC 0.75% 662,886 -82% 0% $12,216,988

Institutional Holders of OneStream, Inc. - Onestream Ord Shs Class A (OS) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price Investors
2025 Q4 15,903 $292,298 +$2,390 $18.38 4
2025 Q3 78,684,331 $1,450,162,850 -$247,394,073 $18.43 180
2025 Q2 87,102,837 $2,464,752,865 +$660,992,272 $28.30 185
2025 Q1 63,688,267 $1,358,555,234 +$139,486,819 $21.34 139
2024 Q4 53,348,725 $1,521,505,868 -$3,152,045,853 $28.52 159
2024 Q3 141,504,982 $4,796,662,441 +$4,781,290,316 $33.90 113