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United States Chemicals

Westlake Chemical Partners LP (WLKP)

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Ticker: WLKP Exchange: NYS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Gilson Jean-Marc
President and CEO
1 purchase — total 2,025 USD
Buy 27 Aug 2025
Value US$4,079,278.25 | Price 262.69 | Shares 25,861
Buy 21 Aug 2025
Value US$4,783,121.75 | Price 292.38 | Shares 72,923
Buy 20 Aug 2025
Value US$27,328.75 | Price 21.86 | Shares 1,250
Buy 15 Aug 2025
Value US$102,652.70 | Price 21.84 | Shares 4,700
Proposed sale 15 Aug 2025
Value US$263,400.00 | Price 21.95 | Shares 12,000
Buy 29 May 2025
Value US$2,080.95 | Price 22.20 | Shares 94
Sale 29 May 2025
Value US$81,770.00 | Price 22.10 | Shares 3,700
Sale 28 May 2025
Value US$101,660.00 | Price 22.10 | Shares 4,600
Sale 27 May 2025
Value US$124,329.36 | Price 22.17 | Shares 5,608
Proposed sale 27 May 2025
Value US$308,479.00 | Price 22.18 | Shares 13,908
Buy 25 Feb 2025
Value US$2,042.05 | Price 24.75 | Shares 83
Buy 27 Nov 2024
Value US$2,002.08 | Price 23.57 | Shares 85
Buy 29 Aug 2024
Value US$22,830.00 | Price 22.83 | Shares 1,000
Buy 28 Aug 2024
Value US$11,470.00 | Price 22.94 | Shares 500
Buy 27 Aug 2024
Value US$22,950.00 | Price 22.95 | Shares 1,000
Buy 26 Aug 2024
Value US$11,422.50 | Price 22.85 | Shares 500
Buy 23 Aug 2024
Value US$11,440.00 | Price 22.88 | Shares 500
Buy 22 Aug 2024
Value US$9,650.20 | Price 22.60 | Shares 427
Buy 12 Aug 2024
Value US$60,914.58 | Price 22.63 | Shares 2,692
Buy 9 Aug 2024
Value US$275,868.00 | Price 22.99 | Shares 12,000
Buy 30 May 2024
Value US$50,928.93 | Price 22.23 | Shares 2,291
Buy 10 May 2024
Value US$158,439.99 | Price 22.07 | Shares 7,178
Buy 8 May 2024
Value US$221,000.00 | Price 22.10 | Shares 10,000
Buy 8 May 2024
Value US$221,000.00 | Price 22.10 | Shares 10,000
Buy 28 Mar 2024
Value US$111,150.00 | Price 22.23 | Shares 5,000
Buy 21 Mar 2024
Value US$93,736.80 | Price 22.16 | Shares 4,230
Buy 6 Mar 2024
Value US$111,500.00 | Price 22.30 | Shares 5,000
Buy 22 Feb 2024
Value US$221,160.00 | Price 22.12 | Shares 10,000
Buy 9 Nov 2023
Value US$107,400.00 | Price 21.48 | Shares 5,000
Buy 6 Nov 2023
Value US$220,180.00 | Price 22.02 | Shares 10,000
Buy 29 Aug 2023
Value US$227,380.00 | Price 22.74 | Shares 10,000
Buy 22 Aug 2023
Value US$262,304.36 | Price 22.30 | Shares 11,762
Buy 21 Aug 2023
Value US$14,216.73 | Price 22.11 | Shares 643
Buy 17 Aug 2023
Value US$110,410.00 | Price 22.08 | Shares 5,000
Buy 16 Aug 2023
Value US$74,434.87 | Price 22.23 | Shares 3,349
Buy 15 Aug 2023
Value US$18,806.58 | Price 22.00 | Shares 855
Buy 10 Aug 2023
Value US$112,750.00 | Price 22.55 | Shares 5,000
Buy 9 Aug 2023
Value US$115,000.00 | Price 23.00 | Shares 5,000
Buy 7 Aug 2023
Value US$115,000.00 | Price 23.00 | Shares 5,000
Buy 13 Mar 2023
Value US$107,205.00 | Price 21.44 | Shares 5,000
Buy 10 Mar 2023
Value US$220,200.00 | Price 22.02 | Shares 10,000
Buy 15 Nov 2022
Value US$100,213.46 | Price 22.97 | Shares 4,362
Buy 10 Nov 2022
Value US$129,550.53 | Price 22.98 | Shares 5,638
Sale 31 May 2022
Value US$55,080.00 | Price 27.54 | Shares 2,000
Sale 31 May 2022
Value US$781,614.76 | Price 26.87 | Shares 29,092
Buy 8 Mar 2022
Value US$263,400.00 | Price 26.34 | Shares 10,000
Buy 7 Mar 2022
Value US$209,224.00 | Price 26.15 | Shares 8,000
Buy 5 Mar 2021
Value US$93,872.40 | Price 23.47 | Shares 4,000
Buy 13 Nov 2020
Value US$9,295.00 | Price 18.59 | Shares 500
Buy 12 Nov 2020
Value US$9,349.60 | Price 18.70 | Shares 500
Buy 11 Nov 2020
Value US$18,570.00 | Price 18.57 | Shares 1,000
Buy 24 Mar 2020
Value US$22,390.22 | Price 14.18 | Shares 1,579
Buy 24 Mar 2020
Value US$43,072.00 | Price 13.46 | Shares 3,200
Buy 23 Mar 2020
Value US$62,713.60 | Price 13.12 | Shares 4,780
Buy 23 Mar 2020
Value US$13,830.00 | Price 13.83 | Shares 1,000
Buy 23 Mar 2020
Value US$39,420.00 | Price 13.14 | Shares 3,000
Buy 20 Mar 2020
Value US$19,992.00 | Price 14.28 | Shares 1,400
Buy 20 Mar 2020
Value US$170,214.66 | Price 13.86 | Shares 12,281
Buy 20 Mar 2020
Value US$41,691.00 | Price 13.90 | Shares 3,000
Buy 19 Mar 2020
Value US$99,897.00 | Price 14.20 | Shares 7,035
Buy 19 Mar 2020
Value US$26,124.00 | Price 12.44 | Shares 2,100
Buy 18 Mar 2020
Value US$70,247.52 | Price 12.12 | Shares 5,796
Buy 18 Mar 2020
Value US$116,334.54 | Price 11.43 | Shares 10,178
Buy 18 Mar 2020
Value US$47,640.00 | Price 11.91 | Shares 4,000
Buy 17 Mar 2020
Value US$52,476.80 | Price 14.26 | Shares 3,680
Buy 17 Mar 2020
Value US$93,173.04 | Price 13.59 | Shares 6,856
Buy 16 Mar 2020
Value US$106,620.25 | Price 14.15 | Shares 7,535
Buy 13 Mar 2020
Value US$14,914.00 | Price 14.91 | Shares 1,000
Buy 13 Mar 2020
Value US$54,344.40 | Price 15.18 | Shares 3,580
Buy 12 Mar 2020
Value US$15,073.00 | Price 15.07 | Shares 1,000
Buy 12 Mar 2020
Value US$16,010.00 | Price 16.01 | Shares 1,000
Buy 11 Mar 2020
Value US$42,000.00 | Price 16.80 | Shares 2,500
Buy 10 Mar 2020
Value US$45,265.00 | Price 18.11 | Shares 2,500
Sale 12 Nov 2019
Value US$114,650.00 | Price 22.93 | Shares 5,000
Buy 29 Mar 2019
Value US$29,999,996.60 | Price 21.40 | Shares 1,401,869
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2025-08-29 2025-08-27 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
25,861 -12.4%
262.69
US$4,079,278 		25,861 -12.4% 262.69 US$4,079,278
2025-08-28 2025-08-21 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
72,923 +31.0%
292.38
US$4,783,122 		72,923 +31.0% 292.38 US$4,783,122
2025-08-28 2025-08-20 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
90,684 +22.8%
49.32
US$3,758,848 		90,684 +22.8% 49.32 US$3,758,848
2025-08-28 2025-08-15 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
4,700 +104.3%
21.84
US$102,653 		4,700 +104.3% 21.84 US$102,653
2025-08-15 2025-08-15 PrS Proposed sale
Ronald Bruce Northcutt

Director

Non-Executive Director
12,000
21.95
US$263,400 		12,000 21.95 US$263,400
2025-08-28 2025-05-29 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
94 +2.1%
22.20
US$2,081 		94 +2.1% 22.20 US$2,081
2025-05-30 2025-05-29 S Sale
3.2
Chao James

Senior Chairman

Executive Director
3,700 -100.0%
22.10
US$81,770 		3,700 -100.0% 22.10 US$81,770
2025-05-29 2025-05-28 S Sale
3.2
Chao James

Senior Chairman

Executive Director
4,600 -55.4%
22.10
US$101,660 		4,600 -55.4% 22.10 US$101,660
2025-05-29 2025-05-27 S Sale
3.2
Chao James

Senior Chairman

Executive Director
5,608 -40.3%
22.17
US$124,329 		5,608 -40.3% 22.17 US$124,329
2025-05-27 2025-05-27 PrS Proposed sale
3.2
Chao James

Director

Non-Executive Director
13,908
22.18
US$308,479 		13,908 22.18 US$308,479
2025-08-28 2025-02-25 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
83 +1.9%
24.75
US$2,042 		83 +1.9% 24.75 US$2,042
2025-08-28 2024-11-27 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
85 +2.0%
23.57
US$2,002 		85 +2.0% 23.57 US$2,002
2024-09-03 2024-08-29 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
1,000 +34.2%
22.83
US$22,830 		1,000 +34.2% 22.83 US$22,830
2024-08-28 2024-08-28 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
500 +20.6%
22.94
US$11,470 		500 +20.6% 22.94 US$11,470
2024-08-28 2024-08-27 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
1,000 +70.1%
22.95
US$22,950 		1,000 +70.1% 22.95 US$22,950
2024-08-28 2024-08-26 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
500 +53.9%
22.85
US$11,422 		500 +53.9% 22.85 US$11,422
2024-08-26 2024-08-23 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
500 +117.1%
22.88
US$11,440 		500 +117.1% 22.88 US$11,440
2024-08-26 2024-08-22 B Purchase
2.4
Gilson Jean-Marc

President and CEO

Executive Director
427 +inf%
22.60
US$9,650 		427 +inf% 22.60 US$9,650
2024-08-14 2024-08-12 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
2,692 +1.5%
22.63
US$60,915 		2,692 +1.5% 22.63 US$60,915
2024-08-12 2024-08-09 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
12,000 +7.0%
22.99
US$275,868 		12,000 +7.0% 22.99 US$275,868
2024-06-03 2024-05-30 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
2,291 +1.4%
22.23
US$50,929 		2,291 +1.4% 22.23 US$50,929
2024-05-14 2024-05-10 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
7,178 +4.5%
22.07
US$158,440 		7,178 +4.5% 22.07 US$158,440
2024-05-10 2024-05-08 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +6.6%
22.10
US$221,000 		10,000 +6.6% 22.10 US$221,000
2024-05-10 2024-05-08 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +6.6%
22.10
US$221,000 		10,000 +6.6% 22.10 US$221,000
2024-04-01 2024-03-28 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +3.4%
22.23
US$111,150 		5,000 +3.4% 22.23 US$111,150
2024-03-25 2024-03-21 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
4,230 +3.0%
22.16
US$93,737 		4,230 +3.0% 22.16 US$93,737
2024-03-07 2024-03-06 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +3.7%
22.30
US$111,500 		5,000 +3.7% 22.30 US$111,500
2024-02-26 2024-02-22 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +7.9%
22.12
US$221,160 		10,000 +7.9% 22.12 US$221,160
2023-11-13 2023-11-09 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +4.1%
21.48
US$107,400 		5,000 +4.1% 21.48 US$107,400
2023-11-08 2023-11-06 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +9.0%
22.02
US$220,180 		10,000 +9.0% 22.02 US$220,180
2023-08-31 2023-08-29 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +9.8%
22.74
US$227,380 		10,000 +9.8% 22.74 US$227,380
2023-08-24 2023-08-22 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
11,762 +13.1%
22.30
US$262,304 		11,762 +13.1% 22.30 US$262,304
2023-08-23 2023-08-21 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
643 +0.7%
22.11
US$14,217 		643 +0.7% 22.11 US$14,217
2023-08-21 2023-08-17 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +5.9%
22.08
US$110,410 		5,000 +5.9% 22.08 US$110,410
2023-08-16 2023-08-16 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
3,349 +4.1%
22.23
US$74,435 		3,349 +4.1% 22.23 US$74,435
2023-08-16 2023-08-15 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
855 +1.1%
22.00
US$18,807 		855 +1.1% 22.00 US$18,807
2023-08-11 2023-08-10 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +6.7%
22.55
US$112,750 		5,000 +6.7% 22.55 US$112,750
2023-08-11 2023-08-09 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +7.1%
23.00
US$115,000 		5,000 +7.1% 23.00 US$115,000
2023-08-09 2023-08-07 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +7.7%
23.00
US$115,000 		5,000 +7.7% 23.00 US$115,000
2023-03-14 2023-03-13 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,000 +8.3%
21.44
US$107,205 		5,000 +8.3% 21.44 US$107,205
2023-03-13 2023-03-10 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +20.0%
22.02
US$220,200 		10,000 +20.0% 22.02 US$220,200
2022-11-16 2022-11-15 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
4,362 +9.6%
22.97
US$100,213 		4,362 +9.6% 22.97 US$100,213
2022-11-14 2022-11-10 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
5,638 +14.1%
22.98
US$129,551 		5,638 +14.1% 22.98 US$129,551
2022-06-02 2022-05-31 S Sale
3.2
Chao James

Chairman

Executive Director Large shareholder
2,000 -7.7%
27.54
US$55,080 		2,000 -7.7% 27.54 US$55,080
2022-06-02 2022-05-31 S Sale
3.2
Chao James

Chairman

Executive Director Large shareholder
29,092 -52.9%
26.87
US$781,615 		29,092 -52.9% 26.87 US$781,615
2022-03-09 2022-03-08 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
10,000 +33.3%
26.34
US$263,400 		10,000 +33.3% 26.34 US$263,400
2022-03-08 2022-03-07 B Purchase
3.2
Kenner Andrew

SVP, Olefin Material & Corp Pr

Officer
8,000 +36.4%
26.15
US$209,224 		8,000 +36.4% 26.15 US$209,224
2021-03-08 2021-03-05 B Purchase
3.0
FINLEY G STEPHEN
Non-Executive Director
4,000 +inf%
23.47
US$93,872 		4,000 +inf% 23.47 US$93,872
2020-11-16 2020-11-13 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
500 +4.3%
18.59
US$9,295 		500 +4.3% 18.59 US$9,295
2020-11-16 2020-11-12 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
500 +4.5%
18.70
US$9,350 		500 +4.5% 18.70 US$9,350
2020-11-12 2020-11-11 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
1,000 +10.0%
18.57
US$18,570 		1,000 +10.0% 18.57 US$18,570
2020-03-25 2020-03-24 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
1,579 +1.0%
14.18
US$22,390 		1,579 +1.0% 14.18 US$22,390
2020-03-25 2020-03-24 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
3,200 +2.0%
13.46
US$43,072 		3,200 +2.0% 13.46 US$43,072
2020-03-24 2020-03-23 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
4,780 +3.0%
13.12
US$62,714 		4,780 +3.0% 13.12 US$62,714
2020-03-23 2020-03-23 B Purchase
3.8
Ederington L. Benjamin

VP, General Counsel

Executive Director
1,000 +9.1%
13.83
US$13,830 		1,000 +9.1% 13.83 US$13,830
2020-03-23 2020-03-23 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
3,000 +42.9%
13.14
US$39,420 		3,000 +42.9% 13.14 US$39,420
2020-03-23 2020-03-20 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
1,400 +0.9%
14.28
US$19,992 		1,400 +0.9% 14.28 US$19,992
2020-03-23 2020-03-20 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
12,281 +8.6%
13.86
US$170,215 		12,281 +8.6% 13.86 US$170,215
2020-03-20 2020-03-20 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
3,000 +75.0%
13.90
US$41,691 		3,000 +75.0% 13.90 US$41,691
2020-03-20 2020-03-19 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
7,035 +5.2%
14.20
US$99,897 		7,035 +5.2% 14.20 US$99,897
2020-03-20 2020-03-19 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
2,100 +1.6%
12.44
US$26,124 		2,100 +1.6% 12.44 US$26,124
2020-03-19 2020-03-18 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
5,796 +4.5%
12.12
US$70,248 		5,796 +4.5% 12.12 US$70,248
2020-03-19 2020-03-18 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
10,178 +8.6%
11.43
US$116,335 		10,178 +8.6% 11.43 US$116,335
2020-03-18 2020-03-18 B Purchase
4.0
WOELFEL RANDY
Non-Executive Director
4,000 +inf%
11.91
US$47,640 		4,000 +inf% 11.91 US$47,640
2020-03-18 2020-03-17 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
3,680 +3.2%
14.26
US$52,477 		3,680 +3.2% 14.26 US$52,477
2020-03-18 2020-03-17 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
6,856 +6.4%
13.59
US$93,173 		6,856 +6.4% 13.59 US$93,173
2020-03-17 2020-03-16 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
7,535 +7.5%
14.15
US$106,620 		7,535 +7.5% 14.15 US$106,620
2020-03-16 2020-03-13 B Purchase
3.1
Bender Mark Steven

SVP, CFO

Executive Director
1,000 +7.7%
14.91
US$14,914 		1,000 +7.7% 14.91 US$14,914
2020-03-16 2020-03-13 B Purchase
2.6
Chao Albert

President & CEO

Executive Director Large shareholder
3,580 +3.7%
15.18
US$54,344 		3,580 +3.7% 15.18 US$54,344
2020-03-16 2020-03-12 B Purchase
3.1
Bender Mark Steven

SVP, CFO

Executive Director
1,000 +8.3%
15.07
US$15,073 		1,000 +8.3% 15.07 US$15,073
2020-03-16 2020-03-12 B Purchase
3.8
Ederington L. Benjamin

VP, General Counsel

Executive Director
1,000 +10.0%
16.01
US$16,010 		1,000 +10.0% 16.01 US$16,010
2020-03-12 2020-03-11 B Purchase
1.7
Teel Lawrence E.

SVP, Olefins

Officer
2,500 +24.3%
16.80
US$42,000 		2,500 +24.3% 16.80 US$42,000
2020-03-12 2020-03-10 B Purchase
1.7
Teel Lawrence E.

SVP, Olefins

Officer
2,500 +32.1%
18.11
US$45,265 		2,500 +32.1% 18.11 US$45,265
2019-11-12 2019-11-12 S Sale Mangieri George J

VP & Chief Accounting Officer

Officer
5,000 -100.0%
22.93
US$114,650 		5,000 -100.0% 22.93 US$114,650
2019-04-01 2019-03-29 B Purchase
3.6
TTWFGP LLC
Large shareholder
1,401,869 +inf%
21.40
US$29,999,997 		1,401,869 +inf% 21.40 US$29,999,997
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