Yeah, its really weird to me how I've seen several of these posts that specifically mention Blackrock, but the OP doesnt mention Vanguard when (I think) Vanguard is bigger, is the majority shareholder of Blackrock and Vanguard is the black hole where you cant see who owns it.

According to this, Vanguard is a big player is SIGA as well.

https://www.msn.com/en-us/money/stockdetails/ownership/fi-azfvfr?ownershipType=fund

And further looking at it, theres actually multiple names for Vanguard, too. Of course there are. Fucking shady motherfuckers. If you add up all of the different vanguard names they actually own more than Blackrock does.

2,237,774 (Institutional Ownership - The Vanguard Group, Inc.) + 1,214,044 (Mutual Fund Ownership - Vanguard US Total Market Shares Index ETF AUD) + 518,613 (Mutual Fund Ownership - Vanguard Extended Market Index Fund;ETF) = 3,970,431 Total Vanguard Shares

All I see for Blakrock is the One under Institutional Ownership - BlackRock Institutional Trust Company, N.A. - 3,478,190

Also, Interesting to note the name of Vanguard too. Makes sense that they're the biggest player.

vanguard văn′gärd noun

1. The foremost position in an army or fleet advancing into battle.
2. The foremost or leading position in a trend or movement.
3. Those occupying a foremost position.
4. A detachment of an army whose duty it is to guard against surprise from the front and to clear the way; the van. Compare van.
5. The troops who march in front of an army; the advance guard; the van.
6. The leading units at the front of an army or fleet.
7. The person(s) at the forefront of any group or movement.