Reach the investors backing rounds like this
Backed by 137 Ventures, Banner VC · verified emails and LinkedIn on Datapile

Impulse Space Raises $500 Million at $4 Billion to Build the 'Last Mile' of the Space Economy - Tech Times
Impulse Space is an in-space transportation startup that builds orbital tugs and kick stages to move spacecraft after they reach low Earth orbit. The company aims to address the costly and slow 'last mile' of space logistics, providing essential infrastructure for satellite maneuvering and positioning.
Impulse Space Raises $500 Million at $4 Billion to Build the 'Last Mile' of the Space Economy Tech Times

You just read who funded Impulse Space. The same database has the investors behind every other round — with verified emails, check sizes and the stages they actually write at.
Free account: 5 investor contact unlocks a month, no card required.