I do not think this is correct. As I posted earlier today the SEC definition of the institutional investor excludes retail investors holding shares through the corresponding brokerage. In this case it is not the brokerage which exercises investment discretion, but retail investor. Therefore shares held by retail investors through a brokerage do not get listed on 13F.
I don't want to keep harping on this but institutional investor and institutional investment manager are NOT the same things, you're mixing them up.
- The NASDAQ "Institutional Holdings" webpage you originally correctly cited does not include retail holdings. No disagreement.
- Form 13F is filed by an institutional investment manager and *does* included holdings in funds held by retail investors.
I'm not sure why you still disagree when I linked the 13F section that specifically cites BoA/ML file together under the BoA 13F. Again, it shows the institutional holdings number can include an institutional investor account at Merrill Lynch.
And I specifically said hypothetical example, as you were asking how a fund would buy more TSLA shares without the fund manager deciding to do so.
Anyway, thank you for finding that gem on Lovallo tho