SEC Form 4 · accession 0001140361-16-087088
WESTLAKE CORP · WLK
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Michael J. Mattina
Officer — Sr. VP, Polyethylene
Period of report
Nov 15, 2016
Accepted (ET)
Nov 17, 2016 · 4:15 pm EST
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001262823
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Nov 15, 2016 | M | 15,358 | $15.805 | A | 21,421 | D | |
| Common Stock | Nov 15, 2016 | M | 1,334 | $30.0525 | A | 22,755 | D | |
| Common Stock | Nov 15, 2016 | M | 1,582 | $45.6975 | A | 24,337 | D | |
| Common Stock | Nov 15, 2016 | S | 18,274 | $53.78 | D | 6,063 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Employee Option (right to buy)F1 | $15.805 | Nov 15, 2016 | M | 15,358 | D | — | Feb 23, 2017 | Common Stock | 15,358 | 0 | D |
| Employee Option (right to buy)F2 | $30.0525 | Nov 15, 2016 | M | 1,334 | D | — | Feb 17, 2022 | Common Stock | 1,334 | 0 | D |
| Employee Option (right to buy)F3 | $45.6975 | Nov 15, 2016 | M | 1,582 | D | — | Feb 15, 2023 | Common Stock | 1,582 | 0 | D |
Explanation of responses
- F1The stock options are exercisable in two equal installments on February 23, 2012 and August 23, 2016.
- F2The stock options are exercisable in three installments of 33%, 33% and 34% on February 17, 2013, 2014, and 2015, respectively.
- F3The stock options are exercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015, and 2016, respectively.