Company Insider Tape

Westlake Chemical Corporation insider transactions

Executive and director filing history, acquisition and disposal balance, executive concentration, cadence, and stored market context.

Symbol WLK Latest filing 15 Jun 2026

Company Read

Net disposal

WLK has 7 stored insider filings. Acquisitions account for 42.9% of classified filings and disposals account for 57.1%. The largest stored filing is $1.8M from BENDER, MARK STEVEN.

Latest filing 15 Jun 2026most recent stored row
Largest filing $1.8Mreported transaction value
Total filings 7stored transaction rows
Acquisition value $03 acquisitions
Disposal value $2.8M4 disposals
Net value $-2.8Macquisitions minus disposals

Filing cadence

Last 12 active months
Mar 2026 2
Apr 2026 1
May 2026 3
Jun 2026 1

Acquisitions 42.9% · Disposals 57.1%

Mar 2026 $2.3M
Apr 2026 $0
May 2026 $514.3K
Jun 2026 $0

Executive concentration

By filing count
BENDER, MARK STEVEN EVP & CFO · 4 filings
BUESINGER, ROBERT F. EVP, PEM Segment Head · 1 filings
BAKSHT, JONATHAN SVP and CFO · 1 filings
POWERS, BRIAN JOHN SVP, PEM Segment Head · 1 filings

Market Context

WLK weekly market snapshot

Week 31 Jul 2026
Latest close 70.50 USDstored weekly close
1-week move -4.5%latest weekly bar
13-week move -5.7%medium-term context
Relative Strength -24.2Sharemaestro indicator
Fair value gap -34.7%price vs fair value
Trend signal 0smoothed trend state

Transaction History

Latest insider filings for WLK

Showing 1-7 of 7
Date 15 Jun 2026
Insider BAKSHT, JONATHANSVP and CFO
Side Acquisition
Shares 20580
Price 0.00
Value 0
Security Restricted Stock Units
Date 13 May 2026
Insider BENDER, MARK STEVENEVP & CFO
Side Disposal
Shares 5284
Price 97.34
Value 514345
Security Common Stock
Date 12 May 2026
Insider BENDER, MARK STEVENEVP & CFO
Side Disposal
Shares 13164
Price 0.00
Value 0
Security Restricted Stock Units
Date 12 May 2026
Insider BENDER, MARK STEVENEVP & CFO
Side Acquisition
Shares 13164
Price 0.00
Value 0
Security Common Stock
Date 2 Apr 2026
Insider POWERS, BRIAN JOHNSVP, PEM Segment Head
Side Acquisition
Shares 1961
Price 0.00
Value 0
Security Restricted Stock Units
Date 27 Mar 2026
Insider BENDER, MARK STEVENEVP & CFO
Side Disposal
Shares 16413
Price 112.54
Value 1847037
Security Common Stock
Date 27 Mar 2026
Insider BUESINGER, ROBERT F.EVP, PEM Segment Head
Side Disposal
Shares 4000
Price 115.25
Value 461000
Security Common Stock