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WLKP · Westlake Chemical Partners LP · Holdings

Track WLKP — free
$21.19 -0.16 (-0.75%) Play latest call Q2 2026 earnings call transcript
Market Cap
$747.02M
Shares
35.25M
Volume · Nov 6 32K Avg daily vol (3M) 23.04K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 59
Total Value: $229,624,465
Total Shares: 10,347,874

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 57 13F filers
Top Holder
48.2%
Sep 2023 → Jun 2026 · range 48.2% – 51.6%
of institutional value
Top 5
81.0%
Sep 2023 → Jun 2026 · range 80.5% – 85.4%
of institutional value
Top 10
89.8%
Sep 2023 → Jun 2026 · range 89.8% – 92.7%
of institutional value
HHI
2,688
Sep 2023 → Jun 2026 · range 2,685 – 3,059
Highly concentrated

Who Holds WLKP

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 56 filers, like-for-like change -0.1%; actively managed books -0.1%; index-like books +2.1%.

Holder type Share Filers Change
Registered adviser 27.6% 28 +1.8%
Adviser 48.6% 1 0.0%
Bank 10.3% 9 -7.4%
Broker-dealer 0.5% 1 +0.7%
Non-US 0.0% 1 +1000.0%
Holding company 4.2% 3 +2.4%
Unknown 8.9% 13 +2.1%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-06-30 13F.

Conviction and Crowding

56 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
0
0.000% of filers hold it in their top 10
Mar 31, 2026: 0
Holders above 5%
0
median weight 0.001%
Mar 31, 2026: 0
Crowding
6.97%
of shares outstanding, 21st percentile
Mar 31, 2026: 7.06%
Private-fund advisers
6.81%
of shares outstanding
Institutional ownership
29.1%
29.3% of the estimated free float
Top 10 holders
90.5%
of 13F shares, Herfindahl 0.273
Active holders
-0.1%
like-for-like share change of active filers
5% stakes on record
2
1 13D, 1 13G (1 institutional, 0 passive, 0 exempt)
How long holders have held it value-weighted 23.4 quarters
Under 1 year 1.58% 1 to 3 years 8.35% 3 years or more 90.1% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$22.34
estimated per share
Mar 31, 2026: $22.19
Quarter-end price
$22.26
implied by 13F values
Estimated gain or loss
-0.3%
price against the estimated cost
Estimated at a loss
58.1%
of costed 13F value

Estimated cost covers 10.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies WLKP's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 DKL Delek Logistics Partners, LP 3
2 GLP Global Partners LP 3
3 GEL Genesis Energy LP 3
4 HESM Hess Midstream LP 4
5 KNTK Kinetik Holdings Inc. 4
6 CQP Cheniere Energy Partners, L.P. 3
7 SUN Sunoco LP 4
8 MPLX Mplx LP 7
9 PAA Plains All American Pipeline LP 5
10 ARLP Alliance Resource Partners LP 3

Shareholder Targets

13F filers that own its peers but not WLKP, quarter ended Jun 30, 2026

Found through its holder-overlap peers: DKL, GLP, GEL, HESM, KNTK, CQP, SUN, MPLX, PAA, ARLP, PAGP, AM, WES, ET, EPD, BKR, TRGP, OKE, ENB, KMI. 3,587 filers in all.

# Filer In peers
1 BlackRock, Inc. Holding company, Index-like $24,220,289,812 18 held
2 VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like $18,805,760,108 7 held
3 STATE STREET CORP Bank, Index-like $15,781,364,156 9 held
4 Blackstone Inc. Adviser, Concentrated $12,982,112,001 19 held
5 ALPS ADVISORS INC Registered adviser, Diversified active $12,430,135,111 19 held
6 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $11,371,516,395 9 held
7 GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like $8,123,291,391 10 held
8 BROOKFIELD Corp /ON/ Unknown, Concentrated $7,243,770,413 14 held
9 NORGES BANK Non-US, Index-like $5,419,521,656 7 held
10 TORTOISE CAPITAL ADVISORS, L.L.C. Registered adviser, Concentrated $5,344,705,192 17 held

Fund Ownership of WLKP by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 2.03% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.00% 0
Index ETFs 2.03% 715,599
Active ETFs 3.72% 1,312,153
Active funds 15.90% 5,605,616
Unclassified 0.00% 0
All registered funds 21.65% 7,633,368
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1604665 CUSIP 960417103 13F (30d) 21 filings 16 filers Visit website Investor relations