From my understanding, SPAC units are sold during SPAC IPOs. Later, these units can be converted into shares and warrants. What I don't understand is: why is it necessary to issue units in the first place? Why not issue shares and warrants only? The existence of units means that three types of securities could be trading at the same time (convertible units, shares, warrants). Doesn't this increase the amount of paperwork for the issuer? Is there a fundamental reason why SPACs have to issue units instead of only shares and warrants?

  • I had to find this to even know what a SPAC is: corpgov.law.harvard.edu/2018/07/06/… and may answer your questions. Commented Mar 28, 2021 at 9:36
  • 1
    It's more expedient to issue one security (a unit) than to issue two (shares and warrants). Commented Mar 28, 2021 at 11:32
  • @BobBaerker Why not just one security, shares?
    – user12515
    Commented Apr 5, 2021 at 4:18
  • Warrants are incentive to many investors/traders because they are effectively inexpensive long term options. Commented Apr 5, 2021 at 14:41

1 Answer 1


They issue units because when they are fund-raising they lay-out the terms on how much a certain amount of investment is convertible into shares/warrants. So for starters, it is a generally easier negotiation i.e. you will get 1 share + 1/4 warrant per unit at $10 per unit investment. Moreover, it also sets the terms in a more simplified and easily calculated way... $10/unit is easier to split up in 100m units for example than say $9.75 per share + $0.25 per 1/4 warrant.

Also, similar to the point on easier negotiation, the terms for each SPAC presented in the S-1 is different per each blank-check company. By selling units at $10/unit, it standardizes the process where some SPACs can offer 1/3 of a warrant attached... no warrants attached... 2/9 attached etc.

Lastly, by selling units to the subscribed investors thus attaching warrants to shares, it incentivize the institutional investors to get in early and help fund the SPACs IPO. Basically giving the institutions an advantage and edge on getting in early, because why would they subscribe to the IPO for only shares for example, when they could hope some other institution or investor steps in and they just buy them on the secondary market days or weeks later. Also, remember: the units are not redeemable, the shares are - by letting the early subscribers in early they are able to have a guaranteed arbitrage of sorts.

Here are some interesting links for your reference:
SPAC Presentation from Winston & Strawn LLP
PwC Insights on SPACs
What You Need to Know About SPACs -- SEC
CFI (Corporate Finance Institute) on SPACs

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