3D Systems Corp (DDD)

[Realizer]

Definition of 'SEC Form 25'
A notification given to the SEC by a national securities exchange telling of the removal from listing on that exchange and registration of matured, redeemed or retired corporate securities. SEC Form 25 is required by Rule 12d2-2 of the Securities Exchange Act of 1934. A security is considered to be delisted 10 days after the filing of Form 25 with the SEC.

Investopedia explains 'SEC Form 25'
Securities may be delisted from an exchange for various reasons. Bonds may have matured or been called and redeemed by a company. Another reason may be that a company has been taken over by another company and all of its outstanding securities have been exchanged for cash or another security.

http://www.investopedia.com/terms/s/sec-form-25.asp