OnterrisONT
13F holders, Q1 2026 (March 31)171holders −15
18new positions
36sold out
7famous investors
$21.98avg. 13F price*
At the end of Q1 2026, 171 institutions reported holding Onterris Inc. (ONT) in their 13F filings, down 15 from Q4 2025. 18 opened new positions and 36 sold out. The largest holders were BlackRock, Inc. ($69.0M), Baron Capital (BAMCO) ($47.5M) and Goldman Sachs Group Inc. ($42.9M). 7 famous investors held it, including Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Onterris Inc.
- Filed as
- MONTROSE ENVIRONMENTAL GROUP (Q1 2026)
- CUSIP
- 615111101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 18 | $31.5M |
| Exits | 36 | $21.6M |
All 13F filers, Q4 2025 → Q1 2026: 3,915,635 shares bought and 2,933,700 shares sold, net +981,935 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 171 holders
| BlackRock, Inc. | 0.00% | Reduce -2.8% | 3,150,760 | $69.0M |
| Baron Capital (BAMCO) | 0.14% | Add +0.3% | 2,168,183 | $47.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +13.1% | 1,960,610 | $42.9M |
| Nomura Asset Management International Inc. | 0.06% | Reduce -7.4% | 1,531,641 | $33.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +4.0% | 1,515,671 | $33.2M |
| Vanguard Capital Management LLC | 0.00% | — | 1,436,165 | $31.4M |
| Principal Financial Group Inc. | 0.02% | Add +5.2% | 1,346,257 | $29.5M |
| Alliancebernstein L.P. | 0.01% | Add +26.6% | 1,130,913 | $28.1M |
| Royce & Associates LP | 0.21% | Add +21.2% | 954,776 | $20.9M |
| Amundi | 0.01% | New | 880,032 | $19.2M |
| Janus Henderson Group PLC | 0.01% | Add +13.5% | 867,042 | $19.0M |
| Dimensional Fund Advisors LP | 0.00% | Add +23.0% | 858,856 | $18.8M |
| Geode Capital Management, LLC | 0.00% | Add +3.7% | 803,732 | $17.6M |
| Truist Financial Corp. | 0.02% | Reduce -1.1% | 795,313 | $17.4M |
| Legal & General Group Plc | 0.00% | Add +18.0% | 753,684 | $16.5M |
| State Street Corp. | 0.00% | Add +0.4% | 728,450 | $15.9M |
| Stephens Investment Management Group LLC | 0.21% | Reduce -1.4% | 694,980 | $15.2M |
| Algert Global LLC | 0.20% | Add +5.7% | 599,025 | $13.1M |
| FMR LLC | 0.00% | Add +25.5% | 568,373 | $12.4M |
| Summit Creek Advisors LLC | 2.30% | Reduce -18.7% | 511,160 | $11.2M |
| Morgan Stanley | 0.00% | Reduce -9.1% | 508,809 | $11.1M |
| DekaBank Deutsche Girozentrale | 0.02% | No change | 505,697 | $11.0M |
| Avalon Trust Co | 0.66% | Add +2.1% | 436,494 | $9.6M |
| Allspring Global Investments Holdings, LLC | 0.01% | Reduce -3.5% | 393,908 | $8.6M |
| Fred Alger Management, LLC | 0.04% | Reduce -63.7% | 387,994 | $8.5M |
| Bank of America Corp. | 0.00% | Reduce -7.4% | 372,637 | $8.2M |
| Fisher Asset Management | 0.00% | No change | 352,569 | $7.7M |
| Northern Trust Corp. | 0.00% | Add +4.7% | 341,298 | $7.5M |
| Millennium Management | 0.01% | Add +334.7% | 311,166 | $6.8M |
| Vanguard Portfolio Management LLC | 0.00% | — | 283,521 | $6.2M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.5% | 273,043 | $6.0M |
| Nuveen, LLC | 0.00% | Reduce -47.3% | 272,364 | $6.0M |
| Peregrine Capital Management LLC | 0.22% | Reduce -4.1% | 268,781 | $5.9M |
| Blair William & Co. | 0.02% | Reduce -21.7% | 266,980 | $5.8M |
| Granahan Investment Management, LLC | 0.26% | Add +21.3% | 241,787 | $5.3M |
| Citadel Advisors | 0.00% | Add +28.9% | 222,587 | $4.9M |
| UBS Group AG | 0.00% | Add +250.7% | 221,778 | $4.9M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 212,109 | $4.6M |
| Russell Investments Group, Ltd. | 0.00% | Add +1.7% | 201,464 | $4.4M |
| Invesco Ltd. | 0.00% | Add +6.4% | 181,500 | $4.0M |
| Tudor Investment Corporation | 0.02% | Reduce -0.0% | 168,671 | $3.7M |
| Citigroup Inc. | 0.00% | Add +9006.6% | 156,451 | $3.4M |
| OP Asset Management Ltd | 0.03% | Add +114.8% | 156,157 | $3.4M |
| Sei Investments Co. | 0.00% | Add +60.9% | 154,308 | $3.4M |
| BNP Paribas Financial Markets | 0.00% | Add +27.7% | 150,373 | $3.3M |
| Jane Street Group, LLC | 0.00% | Add +100.9% | 145,401 | $3.2M |
| Global Alpha Capital Management Ltd. | 0.19% | Reduce -0.3% | 142,996 | $3.1M |
| CenterBook Partners LP | 0.17% | Add +26.8% | 140,508 | $3.1M |
| ArrowMark Colorado Holdings LLC | 0.08% | Reduce -48.1% | 139,928 | $3.1M |
| Mackenzie Financial Corp. | 0.00% | New | 134,451 | $2.9M |
| Panagora Asset Management Inc. | 0.01% | Add +2.7% | 134,177 | $2.9M |
| Rockefeller Capital Management L.P. | 0.01% | Add +0.2% | 128,188 | $2.8M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +2.1% | 118,912 | $2.6M |
| Essex Investment Management Co. LLC | 0.39% | Add +1.8% | 111,473 | $2.4M |
| AQR Capital Management | 0.00% | Reduce -48.5% | 111,074 | $2.4M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Add +5.0% | 107,481 | $2.4M |
| Bank of New York Mellon Corp | 0.00% | Reduce -1.9% | 99,448 | $2.2M |
| Conestoga Capital Advisors, LLC | 0.04% | Add +16.9% | 83,515 | $1.8M |
| Raiffeisen Bank International AG | 0.03% | New | 86,668 | $1.8M |
| Nordea Investment Management AB | 0.00% | Add +40.7% | 78,642 | $1.7M |
| Qube Research & Technologies Ltd | 0.00% | Add +183.3% | 69,504 | $1.5M |
| Swiss National Bank | 0.00% | No change | 66,100 | $1.4M |
| Gsa Capital Partners LLP | 0.08% | New | 59,455 | $1.3M |
| Wells Fargo & Company | 0.00% | Reduce -22.4% | 55,934 | $1.2M |
| HRT Financial LP | 0.00% | New | 54,565 | $1.2M |
| Creative Planning | 0.00% | Reduce -1.9% | 54,323 | $1.2M |
| ExodusPoint Capital Management, LP | 0.01% | New | 53,532 | $1.2M |
| Cladis Investment Advisory, LLC | 0.64% | Reduce -9.4% | 52,900 | $1.2M |
| Trexquant Investment LP | 0.01% | Reduce -70.7% | 51,192 | $1.1M |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 0.08% | Add +0.2% | 49,543 | $1.1M |
| Congress Asset Management Co. | 0.01% | New | 49,516 | $1.1M |
| Holcombe Financial, Inc. | 0.61% | No change | 47,651 | $1.0M |
| Mariner, LLC | 0.00% | Reduce -6.2% | 39,101 | $856K |
| Harbor Capital Advisors, Inc. | 0.07% | Add +14.8% | 38,240 | $837K |
| XTX Topco Ltd | 0.01% | Add +136.5% | 36,762 | $805K |
| Squarepoint Ops LLC | 0.00% | Reduce -17.9% | 36,485 | $799K |
| Man Group plc | 0.00% | New | 34,801 | $762K |
| Legato Capital Management LLC | 0.07% | Reduce -1.4% | 34,668 | $759K |
| Deutsche Bank AG | 0.00% | Add +13.0% | 32,631 | $714K |
| Franklin Resources Inc. | 0.00% | Reduce -7.4% | 31,193 | $683K |
| T. Rowe Price Associates Inc. | 0.00% | Add +19.2% | 30,727 | $673K |
| California State Teachers Retirement System | 0.00% | Reduce -0.8% | 29,816 | $653K |
| Managed Asset Portfolios, LLC | 0.08% | Add +2.3% | 29,703 | $650K |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 29,017 | $635K |
| Virtus Advisers, LLC | 0.29% | Add +41.9% | 28,518 | $624K |
| Royal Bank of Canada | 0.00% | Reduce -8.3% | 28,422 | $623K |
| Pinnacle Financial Partners, Inc. | 0.00% | No change | 27,333 | $598K |
| Engineers Gate Manager LP | 0.01% | Reduce -55.2% | 26,731 | $585K |
| Stifel Financial Corp. | 0.00% | Reduce -13.9% | 24,231 | $530K |
| Gotham Asset Management | 0.00% | Reduce -18.8% | 22,518 | $493K |
| SG Americas Securities, LLC | 0.00% | Reduce -2.2% | 22,471 | $492K |
| Horrell Capital Management, Inc. | 0.22% | Reduce -8.2% | 22,337 | $489K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -48.1% | 21,966 | $481K |
| Numerai GP LLC | 0.05% | Add +111.5% | 21,656 | $474K |
| Ieq Capital, LLC | 0.00% | Reduce -32.8% | 20,405 | $447K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 19,875 | $435K |
| MetLife Investment Management, LLC | 0.00% | No change | 18,975 | $415K |
| Jupiter Asset Management Ltd. | 0.00% | Add +25.4% | 18,029 | $395K |
| Dark Forest Capital Management LP | 0.03% | Reduce -61.2% | 17,544 | $384K |
| Natixis Advisors, LLC | 0.00% | Reduce -37.9% | 16,351 | $358K |
"% of holder's portfolio" is ONT's weight in each manager's 13F, not the share of Onterris Inc. the manager owns.