Q2 2026 13F · SEC CIK 1596053
Arosa Capital Management LP
Hedge fundFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗
- Reported 13F value
- $114.6M
- Reported positions
- 22
- Top holdings a year, 3 yrs
- +16.8%
- Assets under management
- $856.6M
Arosa Capital Management LP is a hedge fund that reported 22 positions worth $114.6M in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Vicor Corp (VICR, 41.4%), Monolithic Pwr Sys Inc (MPWR, 14.5%), Power Integrations Inc (POWI, 9.1%). A portfolio copying its top holdings returned 16.8% a year over the last 3 years, against 20.4% for the S&P 500.
Arosa Capital Management LP holdings all 22 positions.
Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.
| Stock | % of 13F value | Share change | Reported value |
|---|---|---|---|
| VICRVicor Corp | 41.4% | -20.1% | $47.5M |
| MPWRMonolithic Pwr Sys Inc | 14.5% | +166.7% | $16.6M |
| POWIPower Integrations Inc | 9.1% | — | $10.5M |
| QQnity Electronics Inc Common Stock | 7.1% | — | $8.2M |
| WMBWilliams Cos | 3.9% | -20.0% | $4.5M |
| BWBabcock & Wilcox Enterprises | 3.4% | -52.2% | $3.9M |
| ROGRogers Corp | 3.1% | -49.6% | $3.6M |
| CEVACeva Inc | 2.9% | — | $3.3M |
| SOISolaris Energy Infrastructure Inc | 2.8% | -33.3% | $3.2M |
| AMBAAmbarella Inc | 2.6% | — | $3.0M |
| FLEXFlex Ltd Ord | 1.4% | — | $1.6M |
| AXTIAxt Inc | 1.1% | -79.4% | $1.3M |
| MTRNMaterion Corp | 1.0% | -84.0% | $1.2M |
| EOSEEos Energy Enterprises, Inc. | 1.0% | -72.5% | $1.2M |
| KULRKulr Technology Group Inc | 1.0% | +0.0% | $1.1M |
| NEOVNeovolta Inc | 0.9% | — | $1.0M |
| AOSLAlpha & Omega Semiconductor | 0.6% | -50.0% | $710K |
| TGENTecogen Inc New | 0.6% | -64.3% | $653K |
| IMSRWTerrestrial Energy Inc. | 0.5% | +0.0% | $592K |
| NUCLWEagle Nuclear Energy Corp | 0.5% | -48.0% | $566K |
| GWHTEss Tech in | 0.5% | -39.6% | $523K |
| 64107A113Net Power Inc | 0.0% | +0.0% | $31K |
What Arosa Capital Management LP bought and sold in Q2 2026, against Q1 2026.
New positions
- POWI Power Integrations Inc9.1% of 13F
- Q Qnity Electronics Inc Common Stock7.1% of 13F
- CEVA Ceva Inc2.9% of 13F
- AMBA Ambarella Inc2.6% of 13F
- FLEX Flex Ltd Ord1.4% of 13F
- NEOV Neovolta Inc0.9% of 13F
Added to
- MPWR Monolithic Pwr Sys Inc+166.7% shares
Reduced
- MTRN Materion Corp-84.0% shares
- AXTI Axt Inc-79.4% shares
- EOSE Eos Energy Enterprises, Inc.-72.5% shares
- TGEN Tecogen Inc New-64.3% shares
- BW Babcock & Wilcox Enterprises-52.2% shares
- AOSL Alpha & Omega Semiconductor-50.0% shares
- ROG Rogers Corp-49.6% shares
- NUCLW Eagle Nuclear Energy Corp-48.0% shares
Sold out
- ECG Everus Constr Groupwas 6.8%
- CCJ Cameco Corpwas 4.6%
- NXT Nextpower Incwas 3.9%
- FSLR First Solar Incwas 3.9%
- PWR Quanta Svcs Incwas 3.4%
- MTZ MasTec Incwas 3.1%
- STRL Sterling Infrastructure Incwas 2.1%
- E Eni Spawas 2.0%
Share counts compared with the Q1 2026 13F; a split also changes share counts.
How the holdings did against the S&P 500.
- 1 year
- +30.5% /yr
- S&P 500 +20.1%
- 3 years
- +16.8% /yr
- S&P 500 +20.4%
- 5 years
- +14.8% /yr
- S&P 500 +13.3%
A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.
Reported 13F value by quarter.
| Quarter | 13F value | Positions |
|---|---|---|
| Q2 2026 | $114.6M | 22 |
| Q1 2026 | $153.6M | 49 |
| Q4 2025 | $155.9M | 54 |
| Q3 2025 | $65.0M | 44 |
| Q2 2025 | $137.0M | 39 |
| Q1 2025 | $150.7M | 34 |
| Q4 2024 | $150.5M | 32 |
| Q3 2024 | $141.2M | 28 |
| Q2 2024 | $129.3M | 29 |
| Q1 2024 | $148.3M | 32 |
| Q4 2023 | $160.7M | 25 |
| Q3 2023 | $284.4M | 44 |
Questions about Arosa Capital Management LP's portfolio
What stocks does Arosa Capital Management LP own?
Arosa Capital Management LP's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 22 positions worth $114.6M. The largest are Vicor Corp (VICR) at 41.4%, Monolithic Pwr Sys Inc (MPWR) at 14.5%, Power Integrations Inc (POWI) at 9.1%, Qnity Electronics Inc Common Stock (Q) at 7.1% and Williams Cos (WMB) at 3.9%.
What did Arosa Capital Management LP buy last quarter?
In Q2 2026, Arosa Capital Management LP added a new position in Power Integrations Inc (POWI), a new position in Qnity Electronics Inc Common Stock (Q), a new position in Ceva Inc (CEVA), a new position in Ambarella Inc (AMBA), a new position in Flex Ltd Ord (FLEX) and Monolithic Pwr Sys Inc (MPWR) (+166.7% shares), compared with its Q1 2026 filing.
What did Arosa Capital Management LP sell last quarter?
In Q2 2026, Arosa Capital Management LP sold all of Everus Constr Group (ECG), sold all of Cameco Corp (CCJ), sold all of Nextpower Inc (NXT), sold all of First Solar Inc (FSLR), sold all of Quanta Svcs Inc (PWR), Materion Corp (MTRN) (-84.0% shares), Axt Inc (AXTI) (-79.4% shares) and Eos Energy Enterprises, Inc. (EOSE) (-72.5% shares), compared with its Q1 2026 filing.
How has Arosa Capital Management LP's portfolio performed?
A portfolio copying Arosa Capital Management LP's 20 largest 13F holdings each quarter, from the day each filing was public, returned +16.8% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +30.5% against +20.1%. Over 5 years: +14.8% a year against +13.3%.
When is Arosa Capital Management LP's next 13F filing due?
13F filings are due 45 days after each quarter ends. Arosa Capital Management LP's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.
How much money does Arosa Capital Management LP manage?
Arosa Capital Management LP reported $856.6M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $114.6M.