Westlake Chemical Partners LP - Limited Partnership
US ˙ NYSE ˙ US9604171036

SecurityWLKP / Westlake Chemical Partners LP - Limited Partnership
InstitutionIng Groep Nv
Latest Disclosed Ownership82,000 shares
Latest Disclosed Value $ 1,811,380
Ing Groep Nv ownership in WLKP / Westlake Chemical Partners LP - Limited Partnership

On May 11, 2026 - Ing Groep Nv filed a 13F-HR form disclosing ownership of 82,000 shares of Westlake Chemical Partners LP - Limited Partnership (US:WLKP) valued at $1,811,380 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 82,000 shares of Westlake Chemical Partners LP - Limited Partnership. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,897,480 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 82,000 0 0.00 1,811 16.24 0.0111
2026-02-11 2025-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 82,000 29,000 54.72 1,558 40.11 0.0094
2025-11-06 2025-09-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 53,000 32,000 152.38 1,112 140.17 0.0060
2025-08-06 2025-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 21,000 6,000 40.00 464 33.82 0.0028
2025-05-09 2025-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 15,000 0 0.00 346 -0.29 0.0024
2025-02-03 2024-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 15,000 0 0.00 347 3.27 0.0023
2024-11-06 2024-09-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 15,000 0 0.00 336 -0.59 0.0020
2024-08-13 2024-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 15,000 0 0.00 339 1.50 0.0020
2024-05-10 2024-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 15,000 5,000 50.00 333 54.17 0.0023
2024-02-08 2023-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 10,000 0 0.00 216 -0.46 0.0017
2023-10-27 2023-09-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 10,000 0 0.00 218 0.46 0.0019
2023-08-07 2023-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 10,000 0 0.00 217 -1.82 0.0016
2023-05-09 2023-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 10,000 0 0.00 220 -6.38 0.0021
2023-02-13 2022-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 10,000 10,000 235 0.0024
2017-07-25 2017-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 0 -49,603 -100.00 0 -100.00
2017-05-01 2017-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 49,603 0 0.00 1,248 17.85 0.0226
2017-02-06 2016-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 49,603 -178,400 -78.24 1,059 -79.29 0.0199
2016-11-14 2016-09-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 228,003 0 0.00 5,114 12.42 0.0617
2016-07-27 2016-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 228,003 -64,603 -22.08 4,549 -20.85 0.0612
2016-05-12 2016-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 292,606 74,206 33.98 5,747 18.79 0.0716
2016-02-12 2015-12-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 218,400 0 0.00 4,838 26.58 0.0291
2015-12-09 2015-09-30 13F/A-1 WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 218,400 0 0.00 3,822 -19.66 0.0264
2015-11-10 2015-09-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 218,400 3,822
2015-08-10 2015-06-30 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 218,400 0 0.00 4,757 -19.08 0.0258
2015-05-14 2015-03-31 13F WESTLAKE CHEM PARTNERS COM UNIT RP LP 960417103 218,400 218,400 5,879 0.0295
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.