Security key
960413102
- Security type / class
- Equity / COM
- Total 13F shares
- 44,105,386
- Total 13F value
- $5,148,450,671
- Share change
- -1,745,865
- Put/Call ratio
- 66%
- SEC-reported price per share
- $116.82
- Number of holders
- 337
- Value change
- -$100,723,583
- Number of buys
- 204
- Number of sells
- 130
Open additional details 1 more signal available
Report period
Q1 2026
Institutions
337
Top holders
10
WLK full security history
Ownership snapshot
Full 13F holder table
WESTLAKE CORP SEC filings
WESTLAKE CORP company facts
Broader feeds
Ownership snapshot
Top reported holders of WLK - WESTLAKE CORP - COM (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Dorothy C. Jenkins
Disclosed value leader
Dorothy C. Jenkins
Comparable rows
0/15
Latest evidence
19 Feb 2026
3/4/5
13F
Highest disclosed value: $12,071,920,935
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
Dorothy C. Jenkins has the largest disclosed position value at $12.07B.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Dorothy C. Jenkins's linked filing trail.
Disclosed position value
Top 5
Dorothy C. Jenkins
$12.07B
Orbis Allan Gray Ltd
$324.35M
WELLINGTON MANAGEMENT GROUP LLP
$312.08M
VANGUARD GROUP INC
$289.65M
BlackRock, Inc.
$241.15M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Dorothy C. Jenkins |
3/4/5
Director, 10%+ Owner
|
—
class O/S missing
|
$12,071,920,935
93,479,332 shares
|
— | 12 Aug 2022 |
| Orbis Allan Gray Ltd |
13F
Company
|
—
class O/S missing
|
$324,347,792
4,386,635 shares
|
— | 31 Dec 2025 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
—
class O/S missing
|
$312,079,814
4,220,717 shares
|
— | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
—
class O/S missing
|
$289,647,306
3,917,329 shares
|
— | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
—
class O/S missing
|
$241,150,363
3,261,433 shares
|
— | 31 Dec 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
—
class O/S missing
|
$163,313,000
2,208,715 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
337
Shares
44,105,386
Rows available
337
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
337
Q1 2026 holders
337
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|