Methodology
A common mistake when reading superinvestor filings: adding a firm's 13F to its funds' holdings to get a bigger, more complete total. That total isn't more complete — it counts the same shares two or more times over.
Managers with over $100M in qualifying assets file a quarterly 13F covering every account they manage. Registered funds — mutual funds and ETFs — each file their own N-PORT portfolio report. A manager who runs its own fund lineup files both, and the overlap is the trap: a share held inside one of the manager's funds appears in that fund's N-PORT and in the manager's 13F, because the 13F covers fund accounts too. These are two lenses on overlapping money, not a parent total and its line items.
ARK Investment Management is the adviser; it runs nine ETFs — ARKK, ARKQ, and so on — each filing its own N-PORT. Take Tesla: as of April 2026, four ARK funds' N-PORTs put their combined stake at roughly 2.63 million shares (ARKK alone about 1.65 million). The firm's own 13F for 2026 Q2 reported about 2.76 million shares.
Those numbers are close because they measure almost the same thing — the firm's 13F already contains the funds' shares. Add them together and you'd land around 5.4 million shares, nearly double a position that was never that large.
The firm's 13F isn't a superset of its funds, either. A 13F only covers a defined list of US-listed, 13F-eligible equities; an N-PORT reports a fund's full portfolio, foreign shares and bonds included. And the 13F also covers separately managed accounts that belong to no fund at all. No arithmetic turns one into a correct version of the other.
See the firm-and-funds structure in a real profile: ARK Invest. From there you can track the firm or any individual fund and get an email when they file.