Yeah I think basically all the ones here with letter/number combos are SPVs. (A lot of the time, they're actually the first two letters of the portfolio company -- would be cool to attempt analysis there!)
(I don't think this would change the overall message of the analysis), but one reason why the "Fund I" bump might be so pronounced compared to other reports is because of the "SPV as a service" data that was hinted at in the takeaways.
It's very common for these single-asset SPVs to be titled, "[Abbreviation] Fund I" -- but these aren't really the same type of "Fund I" as a multi-security venture fund run by a professional manager.
E.g.:
(1) These are entities that are sort of arbitrarily titled "Fund I" as part of a template naming convention, but there's not as much of a direct expectation that they'll have a corresponding Fund II, III, etc.
(2) Whether they do is more of a function of the underlying portfolio company raising a subsequent financing and giving the same SPV manager an allocation (which small time SPV managers often don't get pro rata for), rather than the fund manager's ability to raise a subsequent blind pool fund II.