HYTK was a publicly traded shell company that merged with Quest Resource Corporation, a privately held company, on December 31, 1998. In June 2002, HYTK changed its name to Quest Resource Corporation and its ticker symbol to QRCP.
On October 31, 2005, QRCP implemented a 2.5 to 1 reverse stock split, such that each existing share of QRCP (including shares represented by any remaining old HYTK certificates) was then equal to 0.4 shares. In March 2010, QRCP shares were converted into the right to receive PSTR shares at a rate of .0575 PSTR shares for each QRCP share.
Accordingly, if you hold a certificate representing 100 HYTK shares or 100 QRCP shares with an issue date prior to October 31, 2005, that certificate now represents the right to receive 2.3 PSTR shares. No fractional PSTR shares will be issued, so you would receive 3 PSTR shares for your 100 HYTK shares.
If you hold a certificate representing 100 QRCP shares with an issue date of October 31, 2005 or later, that certificate now represents the right to receive 5.75 PSTR shares. No fractional PSTR shares will be issued, so you would receive 6 PSTR shares for your 100 QRCP shares.
Subsequent to the recombination of Quest entities in March of 2010, Computershare issued you a PSTR certificate printed with a restricted legend in error. To attempt to rectify the issue, Computershare sent a letter to all affected shareholders in October 2010 requesting you send your PSTR certificate to Computershare to be sent a new, unrestricted certificate.