Arosa Capital Management LP
Arosa Capital Management LP reported 22 US-listed holdings worth $114.6 million in its 13F for the quarter ended 30 June 2026, filed 14 August 2026. Its largest: Vicor Corp. (41.4%), Monolithic Power Systems, Inc. (14.5%) and Power Integrations Inc. (9.1%). Against the quarter before, it opened 6 positions, added to 1, trimmed 12 and sold out of 33.
The 14 largest of its 22 positions, each sized by its share of the reported holdings, coloured by the change in shares against Q1 2026.
What the fund reported holding at each quarter's end; hover a bar for the number of positions
What its reported holdings returned
Held through each quarter, the holdings it reported returned +166.6% over the 7 quarters to 30 June 2026, against +30.2% for the S&P 500.
Not the fund's own return: each 13F's holdings are kept unchanged until the next one, so trades inside a quarter, dividends, cash and fees are left out. A rough guide to how its picks have done over time.
What it did on the quarter
Its positions against its 13F for the quarter to 31 March 2026; a change under 0.1% of a position counts as held
Opened 6
- Power Integrations Inc. POWI$10.5 million
- Qnity Electronics, Inc. Q$8.2 million
- Ceva Inc. CEVA$3.3 million
- Ambarella Inc. AMBA$3.0 million
- Flex Ltd. FLEX$1.6 million
- Neovolta Inc. NEOV$1.0 million
Added to 1
- Monolithic Power Systems, Inc. MPWR+7,500 shares · +167%
Trimmed 12
- Vicor Corp. VICR-31,500 shares · -20%
- Materion Corp. MTRN-21,000 shares · -84%
- Axt Inc. AXTI-67,500 shares · -79%
- Babcock & Wilcox Enterprises BW-300,000 shares · -52%
- Rogers Corp. ROG-21,612 shares · -50%
- Eos Energy Enterprises Inc. EOSE-526,033 shares · -72%
- Solaris Energy Infrastructure, Inc. SEI-20,000 shares · -33%
- Tecogen Inc. TGEN-225,000 shares · -64%
and 4 more in the table below
Sold out of 33
- Everus Construction Group, Inc. ECG$10.4 million last quarter
- Cameco Corp. CCJ$7.1 million last quarter
- Nextpower Inc. NXT$6.0 million last quarter
- First Solar, Inc. FSLR$6.0 million last quarter
- Quanta Services, Inc. PWR$5.2 million last quarter
- Mastec Inc. MTZ$4.8 million last quarter
- Sterling Infrastructure, Inc. STRL$3.3 million last quarter
- Eni S.p.A. E$3.1 million last quarter
What it holds
| Company | Shares | Value | Of its book | Change in shares |
|---|---|---|---|---|
| Vicor Corp. VICR | 125.0K | $47.5 million | 41.41% | -31.5K |
| Monolithic Power Systems, Inc. MPWR | 12.0K | $16.6 million | 14.47% | +7.5K |
| Power Integrations Inc. POWI | 125.0K | $10.5 million | 9.13% | new |
| Qnity Electronics, Inc. Q | 50.0K | $8.2 million | 7.12% | new |
| Williams Companies, Inc. WMB | 60.0K | $4.5 million | 3.89% | -15.0K |
| Babcock & Wilcox Enterprises BW | 275.0K | $3.9 million | 3.38% | -300.0K |
| Rogers Corp. ROG | 22.0K | $3.6 million | 3.14% | -21.6K |
| Ceva Inc. CEVA | 70.0K | $3.3 million | 2.88% | new |
| Solaris Energy Infrastructure, Inc. SEI | 40.0K | $3.2 million | 2.81% | -20.0K |
| Ambarella Inc. AMBA | 35.0K | $3.0 million | 2.62% | new |
| Flex Ltd. FLEX | 10.0K | $1.6 million | 1.41% | new |
| Axt Inc. AXTI | 17.5K | $1.3 million | 1.10% | -67.5K |
| Materion Corp. MTRN | 4.0K | $1.2 million | 1.04% | -21.0K |
| Eos Energy Enterprises Inc. EOSE | 200.0K | $1.2 million | 1.03% | -526.0K |
| Kulr Technology Group Inc. KULR | 300.0K | $1.1 million | 1.00% | no change |
| Neovolta Inc. NEOV | 320.0K | $1.0 million | 0.88% | new |
| Alpha & Omega Semiconductor Ltd. AOSL | 15.0K | $709,950 | 0.62% | -15.0K |
| Tecogen Inc. TGEN | 125.0K | $652,500 | 0.57% | -225.0K |
| HCM II Acquisition Corp (Pre-Reincorporation) IMSRW | 175.0K | $591,500 | 0.52% | no change |
| Eagle Nuclear Energy Corp. NUCLW | 390.4K | $566,044 | 0.49% | -359.6K |
| Ess Tech Inc. GWH | 550.0K | $522,500 | 0.46% | -360.0K |
| Net Power Inc. NPWRWS | 106.2K | $30,812 | 0.03% | no change |
Read more
Change is shares against its 13F for the quarter before; the 33 it sold out of are in the box above.Options it reported
| Company | Option | Shares under the options | Value of those shares |
|---|---|---|---|
| SPDR S&P 500 SPY | Puts | 80.0K | $59.7 million |
| Vaneck ETF Trust SMH | Puts | 70.0K | $45.9 million |
| Vicor Corp. VICR | Calls | 110.0K | $41.8 million |
| Enphase Energy, Inc. ENPH | Calls | 665.0K | $32.7 million |
| Iren Ltd. IREN | Calls | 710.0K | $32.5 million |
| Invesco QQQ Trust QQQ | Puts | 30.0K | $22.1 million |
| Applied Digital Corp. APLD | Calls | 540.0K | $20.1 million |
| Shoals Technologies Group in SHLS | Calls | 1.4M | $14.4 million |
| Cipher Digital Inc. CIFR | Calls | 550.0K | $13.5 million |
| Vaneck ETF Trust SMH | Calls | 20.0K | $13.1 million |
| Power Integrations Inc. POWI | Calls | 150.0K | $12.6 million |
| Bloom Energy Corp. BE | Calls | 40.0K | $12.1 million |
| Vicor Corp. VICR | Puts | 30.0K | $11.4 million |
| Monolithic Power Systems, Inc. MPWR | Calls | 8.0K | $11.1 million |
| Sunrun Inc. RUN | Calls | 800.0K | $10.7 million |
| Eaton Corp. plc ETN | Calls | 25.0K | $10.7 million |
| NXP Semiconductors N.V. NXPI | Calls | 30.0K | $8.4 million |
| Nextpower Inc. NXT | Calls | 70.0K | $8.3 million |
| Axt Inc. AXTI | Calls | 100.0K | $7.2 million |
| Global X FDS URA | Puts | 150.0K | $6.6 million |
| Devon Energy Corp. DVN | Puts | 150.0K | $6.2 million |
| Solaredge Technologies, Inc. SEDG | Calls | 100.0K | $5.8 million |
| Albemarle Corp. ALB | Calls | 40.0K | $5.4 million |
| Sunrun Inc. RUN | Puts | 400.0K | $5.4 million |
| iShares Trust ICLN | Puts | 250.0K | $5.1 million |
| Mastec Inc. MTZ | Puts | 12.0K | $5.0 million |
| Primoris Services Corp. PRIM | Calls | 50.0K | $5.0 million |
| Terawulf Inc. WULF | Calls | 200.0K | $4.9 million |
| First Solar, Inc. FSLR | Calls | 20.0K | $4.7 million |
| Halliburton Co. HAL | Puts | 120.0K | $4.1 million |
30 option lines. A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost; they are not counted in the holdings above.