Each transaction listed on the Form 4 filing has a transaction code:
General transaction codes
P – Open market or private purchase of securities
S – Open market or private sale of securities
V – Transaction voluntarily reported earlier than required
Rule 16b-3 transaction codes
A – Grant, award, or other acquisition
D – Sale (or disposition) back to the issuer of the securities
F – Payment of exercise price or tax liability by delivering or withholding securities
I – Discretionary transaction, which is an order to the broker to execute the transaction at the best possible price
M – Exercise or conversion of derivative security
Derivative securities codes
C – Conversion of derivative security (usually options)
E – Expiration of short derivative position (usually options)
H – Expiration (or cancellation) of long derivative position with value received (usually options)
O – Exercise of out-of-the-money derivative securities (usually options)
X – Exercise of in-the-money or at-the-money derivatives securities (usually options)
Other sections 16b exempt transactions and small acquisition codes
G – Bona fide gift form of any clauses
L – Small acquisition
W – Acquisition or disposition by will or laws of descent and distribution
Z – Deposit into or withdrawal from voting trust
Other transaction codes
J – Other acquisition or disposition (transaction described in footnotes)
K – Transaction in equity swap or similar instrument
U – Disposition due to a tender of shares in a change of control transaction