WLKPWestlake Chemical Partners LPBasic Materials · Chemicalsas of 2026-09-16
Horizon

Issued 2026-09-16 at $21.28 · now $21.28 (2026-09-16, +0.0% since)

Based on its own history, a month from the 2026-09-16 close, WLKP has typically landed between $19.71 and $22.97 — a range of −7.4% to +8.0% from the issuance price $21.28.

Range of outcomes in historically similar periods — not a price prediction. Ranges are scored publicly on /methodology.
  • Actual close
  • Typical path (median)
  • Middle 50% of outcomes
  • 90% range

3,030 overlapping 1 month windows · 2014-07-302026-08-17 · basis climatology · forecast (batch). Probability up 53.9% (90% CI 51.756.1%, ≈1,408 obs).

The cone is anchored at the 2026-09-16 issuance close ($21.28) — the price the forecast resolves against on 2026-10-15, not the latest close. The drawn path shape is illustrative (bands widen with √t); every labeled number is real — the anchor, the scored batch p90/IQR endpoints, and the typical move.

Where WLKP has typically landed a month from the 2026-09-16 close of $21.28 — the range is history, not a prediction.

$19.71worst · -7.4%$22.97best · +8.0%
  • now $21.28 (+0.0%)
  • typicalThe typical outcome — half of similar past periods did better and half did worse (not an average, so a few wild periods don't skew it). $21.4 (+0.5%)
  • middle 50%The central range of outcomes — half of similar past periods landed inside it, a quarter finished above, a quarter below. $20.77$22.03
  • 90% rangeA nine-in-ten range — in about nine of every ten similar past periods the outcome stayed within these bounds. $19.71$22.97
Actual 1-month windows behind the coneiEvery overlapping 1-month window in this security's own price history was ranked by realized return; shown are the 3 worst and 3 best of 3,030 windows spanning 2014-07-30 to 2026-09-16. Not cherry-picked — these are the extremes of the full sample. Max drop / max rise are the deepest and highest points reached within each window. See /methodology.
StartReturnMax dropMax rise
3 worst
2020-02-18−55.3%−55.3%+2.4%
2020-02-14−45.6%−45.6%+3.7%
2020-02-19−45.0%−55.4%+2.2%
3 best
2020-03-18+50.1%+0.0%+57.6%
2015-11-30+42.8%+0.0%+42.8%
2015-11-27+38.4%−1.0%+38.4%

3,030 overlapping windows · 2014-07-302026-09-16 · not cherry-picked

Seasonality · by month iHow this security has tended to do in each calendar month historically — a frequency, never a prediction.

iFor each calendar month, the share of years this security closed higher than the month before, and the average month-over-month return, over ~13 years of its own price history. Cells are shaded by average return. This is historical frequency, not a prediction — no month is a signal.
Jan
42%
+0.3%
n=12
Feb
58%
−1.8%
n=12
Mar
42%
−1.2%
n=12
Apr
75%
+3.8%
n=12
May
58%
+2.3%
n=12
Jun
33%
−1.4%
n=12
Jul
58%
+1.4%
n=12
Aug
46%
+0.0%
n=13
Sep
8%
−4.1%
n=13
Oct
42%
−1.0%
n=12
Nov
58%
+1.3%
n=12
Dec
83%
+9.1%
n=12

Up-frequency and average month-over-month return · historical frequency, not a prediction

Reported insider & political trades

Every Form 4 the people closest to this company have filed with the SEC — plotted against the share price, aggregated by month, and shown with the gap between when each trade happened and when it was disclosed. A public record, not advice.

Share price & reported tradesMonthly open-market valueReporting lag — trade date to filing date2026-092026-082026-072026-062026-052026-042026-032026-022026-012025-122025-112025-102025-092025-08$23$172025-08-27: 1 insider purchase, $2K — Gilson Jean-Marc2025-08-21: 1 insider purchase, $28K — Gilson Jean-Marc2025-08-20: 1 insider purchase, $27K — Gilson Jean-Marc2025-08-15: 1 insider purchase, $103K — Gilson Jean-Marc2025-08: 4 open-market purchases, $160K↑ buys↓ salesdirector Gilson Jean-Marc — Purchase on 2025-08-27, filed 2 days after the tradedirector Gilson Jean-Marc — Purchase on 2025-08-21, filed 7 days after the tradedirector Gilson Jean-Marc — Purchase on 2025-08-20, filed 8 days after the tradedirector Gilson Jean-Marc — Purchase on 2025-08-15, filed 13 days after the trade
DatePersonRoleActionShares @ priceValueOwnership Δvs S&P 1mvs S&P 6mOwned afterFiling
2025-08-27Gilson Jean-MarcdirectorPurchase95 @ $21.25$2K+0.8% of holding−8.2%−2.6%11,803Form 4 · filed 2 days after the trade
2025-08-21Gilson Jean-MarcdirectorPurchase1,250 @ $22.02$28K+12.0% of holding−9.3%−6.8%11,708Form 4 · filed 7 days after the trade
2025-08-20Gilson Jean-MarcdirectorPurchase1,250 @ $21.86$27K+13.6% of holding−8.7%−8.0%10,458Form 4 · filed 8 days after the trade
2025-08-15Gilson Jean-MarcdirectorPurchase4,700 @ $21.84$103K+104.3% of holding−4.4%−5.7%9,208Form 4 · filed 13 days after the trade
2025-05-29Chao JamesdirectorSale3,700 @ $22.10$82K−100.0% of holding−4.8%−25.2%0Form 4 · filed 1 day after the trade
2025-05-29Gilson Jean-MarcdirectorPurchase94 @ $22.20$2K+2.1% of holding−4.8%−25.2%4,508Form 4 · filed 91 days after the trade
2025-05-28Chao JamesdirectorSale4,600 @ $22.10$102K−55.4% of holding−4.6%−26.7%3,700Form 4 · filed 1 day after the trade
2025-05-27Chao JamesdirectorSale5,608 @ $22.17$124K−40.3% of holding−2.3%−26.0%8,300Form 4 · filed 2 days after the trade
2025-02-25Gilson Jean-MarcdirectorPurchase83 @ $24.75$2K+1.9% of holding+0.7%−13.0%4,414Form 4 · filed 184 days after the trade
2024-11-27Gilson Jean-MarcdirectorPurchase85 @ $23.57$2K+2.0% of holding−1.1%−3.3%4,332Form 4 · filed 274 days after the trade

The vs-S&P columns are a labeled look-back on what the stock did after each filing, measured against the index over the same window. Descriptive history, not a claim about the person or a reason to trade.

28 award / exercise / gift records — not counted as purchases

Awards, option exercises, gifts and tax-withholding disposals are shown separately and never counted as open-market purchases or sales — they carry no conviction information.

DatePersonRoleActionSharesOwned afterFiling
2026-08-12FINLEY G STEPHENdirectorAward / grant5,0440Form 4
2026-08-12WOELFEL RANDYdirectorAward / grant5,0440Form 4
2026-08-12Friel Lisa A.directorAward / grant5,0440Form 4
2026-08-06WOELFEL RANDYdirectorDisposition5,00523,913Form 4
2026-08-06Friel Lisa A.directorDisposition2,5029,666Form 4
2026-08-06FINLEY G STEPHENdirectorOption exercise5,0050Form 4
2026-08-06Friel Lisa A.directorOption exercise5,0050Form 4
2026-08-06WOELFEL RANDYdirectorOption exercise5,0050Form 4
2026-08-06FINLEY G STEPHENdirectorOption exercise5,00536,935Form 4
2026-08-06Friel Lisa A.directorOption exercise5,00512,168Form 4
2026-08-06WOELFEL RANDYdirectorOption exercise5,00528,918Form 4
2026-08-06FINLEY G STEPHENdirectorOption exercise5,00536,935Form 4
2026-08-06WOELFEL RANDYdirectorOption exercise5,00528,918Form 4
2026-08-06Friel Lisa A.directorOption exercise5,00512,168Form 4
2025-08-07WOELFEL RANDYdirectorDisposition4,88223,913Form 4
2025-08-07Friel Lisa A.directorDisposition2,4417,163Form 4
2025-08-07WOELFEL RANDYdirectorOption exercise4,8820Form 4
2025-08-07FINLEY G STEPHENdirectorOption exercise4,8820Form 4
2025-08-07Friel Lisa A.directorOption exercise4,8820Form 4
2025-08-07Friel Lisa A.directorOption exercise4,8829,604Form 4
2025-08-07FINLEY G STEPHENdirectorOption exercise4,88231,930Form 4
2025-08-07FINLEY G STEPHENdirectorOption exercise4,88231,930Form 4
2025-08-07WOELFEL RANDYdirectorOption exercise4,88228,795Form 4
2025-08-07Friel Lisa A.directorOption exercise4,8829,604Form 4
2025-08-07WOELFEL RANDYdirectorOption exercise4,88228,795Form 4
2025-08-06WOELFEL RANDYdirectorAward / grant5,0050Form 4
2025-08-06FINLEY G STEPHENdirectorAward / grant5,0050Form 4
2025-08-06Friel Lisa A.directorAward / grant5,0050Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Across 2012–2021, stocks where a CEO, C-suite officer, or director had recently made an open-market common-stock purchase ran about +28 bp per month above the universe average (n=34,268 stock-weeks). A historical tendency, not a prediction.

Congressional disclosures

No congressional trades disclosed for this company.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.