"Aspen Funds seems to be a solid GP "

My investment with Aspen Funds' 116 Upstream Energy Fund is reasonably new (one year, give or take), but so far the fund is over-performing.

"One O&G Investment, Planning on Future Investments"

Positive experience with Aspen. I like that they are a public facing company. Reporting is adequate, timely and complete. They don't go above and beyond with quarterly updates, hence the 4 starts, but otherwise are responsive, etc. My biggest complaint is that they prioritize larger investors. For example, if an investor has 1M to invest, they will receive a return of 10% vs 8% at a 100k investment amount. I personally don't ethically like tiers that reward larger investors and this has deterred me from a few of their investments. Will be placing more capital with them in the future.