Westlake Chemical Partners LP
Westlake Chemical Partners LP (WLKP) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · WLKP · as of Sep 30, 2025
Ownership Breakdown
61
Institutional Holders
$212.25M
Total Inst. Value
▼ $15.63M vs Q2
35.25M
Shares Outstanding
freeFloat 55.15%
10.11M
13F Shares Held
▼ 204,991 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
WLKP largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
INVESCO LTD. industrial organic chemicals | 5.03M | 14.27% | 14.27% | $105.55B | Nov 13, 2025 | ▼ 169.8K |
ENERGY INCOME PARTNERS, LLC industrial organic chemicals | 1.78M | 5.04% | 5.04% | $37.29B | Nov 13, 2025 | ▲ 2.1K |
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. industrial organic chemicals | 577.3K | 1.64% | 1.64% | $12.12B | Nov 14, 2025 | ▼ 6.6K |
CLEARBRIDGE INVESTMENTS, LLC industrial organic chemicals | 485.9K | 1.38% | 1.38% | $10.20B | Nov 13, 2025 | ▲ 63.0K |
UBS GROUP AG industrial organic chemicals | 462.8K | 1.31% | 1.31% | $9.71B | Nov 13, 2025 | ▼ 7.3K |
BANK OF AMERICA CORP /DE/ industrial organic chemicals | 255.3K | 72.45% | 72.45% | $5.36B | Feb 3, 2026 | ▲ 3.2K |
GOLDMAN SACHS GROUP INC industrial organic chemicals | 228.2K | 64.76% | 64.76% | $4.79B | Nov 14, 2025 | ▼ 2.3K |
CITIGROUP INC industrial organic chemicals | 185.6K | 52.67% | 52.67% | $3.89B | Nov 10, 2025 | ▼ 1.9K |
MORGAN STANLEY industrial organic chemicals | 162.6K | 46.14% | 46.14% | $3.41B | May 27, 2026 | ▲ 10.9K |
PATHWAY FINANCIAL ADVISERS, LLC industrial organic chemicals | 107.2K | 30.42% | 30.42% | $2.25B | Nov 13, 2025 | ▲ 1.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
19
Increased
+179.9K shares5
New Positions
first time holders11
Decreased
−200.5K shares0
Sold Out
fully exitedNet shares change (top 50)
20.6K
+179.9K / −200.5K
Net new holders
+13
5 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
WLKP insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
10
Buy transactions
5
Sell transactions
2.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Gilson Jean-Marc President and CEO | Aug 27, 2025 | Purchase | 95.29 | $21.25 | $2.0K | 11.8K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Aug 21, 2025 | Purchase | 1,250 | $22.02 | $27.5K | 11.7K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Aug 20, 2025 | Purchase | 1,250 | $21.86 | $27.3K | 10.5K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Aug 15, 2025 | Purchase | 4,700 | $21.84 | $102.7K | 9.2K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | May 29, 2025 | Purchase | 93.728 | $22.20 | $2.1K | 4.5K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Feb 25, 2025 | Purchase | 82.507 | $24.75 | $2.0K | 4.4K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Nov 27, 2024 | Purchase | 84.96 | $23.57 | $2.0K | 4.3K | Form 4 ↗ |
Gilson Jean-Marc President and CEO | Aug 28, 2024 | Purchase | 320 | $22.95 | $7.3K | 3.4K | Form 4 ↗ |
WOELFEL RANDY director | Aug 7, 2025 | D-Return | 4,882 | $21.96 | $107.2K | 23.9K | Form 4 ↗ |
WOELFEL RANDY director | Aug 6, 2025 | Award | 5,005 | — | — | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Westlake Chemical Partners LP (WLKP) is primarily owned by institutional investors, who hold approximately 28.7% of total shares outstanding. Company insiders own approximately 44.85%, while retail and public investors account for the remaining 26.46%.
The largest institutional shareholder of Westlake Chemical Partners LP is INVESCO LTD., holding approximately 5.03 million shares — equal to 14.27% of outstanding shares — as of September 30, 2025.
A total of 61 institutional investors currently hold WLKP stock, with a combined institutional value of approximately $212,254,697 as of the most recent 13F filing period.
Frequently asked questions
WLKP ownershipWestlake Chemical Partners LP (WLKP) is primarily owned by institutional investors, who hold approximately 28.7% of shares. The largest shareholder is INVESCO LTD. with a 14.27% stake. Company insiders hold 44.85%. Data sourced from SEC Form 13F as of September 30, 2025.