Westlake Corporation
Westlake Corporation is a registered legal entity registered in United States, and its current status with Texas Secretary of State — SOSDirect is inactive. The company was incorporated on 28 August 2002 and lists its registered address as Houston, United States. 5 shareholders are on record for Westlake Corporation, and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from Texas Secretary of State — SOSDirect and was last updated on 29 September 2026.
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Shareholders
5
Shareholders of Westlake Corporation
Five shareholders are currently on record for Westlake Corporation, reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Vanguard Group Inc, holding 11.7% — the largest recorded stake — followed by Income Fund of America at 6.4%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Data availability
The register reports 8 shareholders in total, though only the top 5 by holding are shown in this view.
Data-provider feed — rows as supplied to Zavia for Texas Secretary of State — SOSDirect, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Vanguard Group Inc | 11.7% | Texas Secretary of State — SOSDirect | |
| Income Fund of America | 6.4% | Texas Secretary of State — SOSDirect | |
| Brandes Investment Partners L.P. | 4.9% | Texas Secretary of State — SOSDirect | |
| iShares Trust-iShares Core S&P Mid-Cap ETF | 3.2% | Texas Secretary of State — SOSDirect | |
| ProShares Trust-ProShares S&P MidCap 400 Dividend Aristocrats ETF | 1.3% | Texas Secretary of State — SOSDirect |
Officers
5
Directors and officers of Westlake Corporation
The Registered Agent of Westlake Corporation currently on record is Robert Marion; five officers are currently on record for Westlake Corporation, filed with Texas Secretary of State — SOSDirect. Management authority at Westlake Corporation sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control. The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Data availability
The register reports 18 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Data-provider feed — rows as supplied to Zavia for Texas Secretary of State — SOSDirect, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Group Structure
Group structure of Westlake Corporation
Westlake Corporation has no recorded parent company — it sits at the top of its own group structure, with 35 subsidiaries recorded beneath it across 1 jurisdiction. Each of these downward relationships is derived rather than filed: resolved by matching entities across the registry network, not stated directly in a single document.
- WESTLAKE CHLOR-VINYLS CORPORATION
- WESTLAKE INTERNATIONAL SERVICES CORPORATION
- WESTLAKE OLEFINS LLC
- WESTLAKE POLYMERS CORPORATION
- WESTLAKE CHEMICAL ENERGY LLC
- Westlake Styrene LLC
- WPT LLC
- WESTLAKE CANADA INC.
- Westlake Longview Corporation
- WESTLAKE ROYAL BUILDING PRODUCTS INC.
Data availability
Those 35 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. 11 of the 35 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Data-provider feed — rows as supplied to Zavia for Texas Secretary of State — SOSDirect, including entries the profile above does not cover. These rows are not a verbatim copy of the register: they have been found to duplicate the same person under different spellings and to keep a status of Active after an appointment ended. Where they disagree with the profile above, the profile is the checked version.
Westlake Corporation
United States
Get complete shareholder and officer records, ultimate beneficial owner resolution, and ongoing ownership monitoring.
Frequently Asked Questions
Who owns Westlake Corporation?
Five shareholders are currently on record for Westlake Corporation, reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Vanguard Group Inc, holding 11.7% — the largest recorded stake — followed by Income Fund of America at 6.4%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is Westlake Corporation's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for Westlake Corporation is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does Westlake Corporation have on record?
5 shareholders are shown on record for Westlake Corporation. The register reports 8 in total; only the top 5 by holding are shown here.
Is Westlake Corporation still an active company?
Westlake Corporation's status on Texas Secretary of State — SOSDirect is listed as inactive, not currently active.
When was Westlake Corporation incorporated?
Westlake Corporation was incorporated on 28 August 2002, according to Texas Secretary of State — SOSDirect.
What is Westlake Corporation's registered address?
The registered address on file for Westlake Corporation is Houston, United States.
Who are the officers/directors of Westlake Corporation?
The Registered Agent of Westlake Corporation currently on record is Robert Marion; five officers are currently on record for Westlake Corporation, filed with Texas Secretary of State — SOSDirect. Management authority at Westlake Corporation sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does Westlake Corporation have a parent company or subsidiaries?
Westlake Corporation has no recorded parent company — it sits at the top of its own group structure, with 35 subsidiaries recorded beneath it across 1 jurisdiction. Those 35 subsidiaries span United States jurisdiction, though this list should not be read as complete — subsidiaries only become visible here where shareholder data has actually been filed with a register, so holdings in jurisdictions without that filing simply won't appear. 11 of the 35 go a level deeper still, with their own further subsidiaries recorded beneath them — additional ownership layers this view doesn't expand.
Can Zavia monitor changes to Westlake Corporation's ownership over time?
This profile reflects a point-in-time snapshot from Texas Secretary of State — SOSDirect. Zavia's monitoring API can track changes to Westlake Corporation's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access Westlake Corporation's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like Westlake Corporation's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Texas Secretary of State — SOSDirect and was last synced on 29 September 2026.