How much would $1,000 invested in WLK be worth today?

$1,000 invested in WLK on October 17, 2016 would be worth $1,400 on October 16, 2026, with dividends reinvested — 3.4% a year compounded (CAGR).

How far back does the WLK calculator go?

WLK data begins August 12, 2004, with a close every session. Pick any start and end date in that span — 22 years, 2 months of history.

Does this include dividends?

Yes. The default "dividends reinvested" view uses split- and dividend-adjusted closing prices — a standard total-return approximation that excludes taxes and fees. A price-only view (split-adjusted, no dividends) is also available.

If You Invested $1,000 in Westlake (WLK): What It Would Be Worth Today

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WLK

$63.33-0.44%

as of close, Oct 16, 2026

☾ AH $63.33 -0.44%

Westlake CorporationStock · MaterialsRussell 1000 0.003%Russell 3000 0.003%US Stock Market 0.003%

PeersLINFCXNEMCDEHLSHW

Your investment#

How much

All at once, on the start date

Pick start & end dates10 years

Start

Key dates

Start at a well-known dateRecentMarket topsMarket bottomsEvents

Bought at that day's close

End

Key dates

End at a well-known dateMarket topsMarket bottomsEvents

Latest close, Oct 16, 2026

Or drag the slider to set start and end dates

2004 to today, log scale

2008 crisisCovid

200520102020Oct 2016Today

Options

Result#

$1,000Oct 17, 2016$1,400Oct 16, 20261.4×your money

$1,000 invested in WLK on October 17, 2016 was worth $1,400 on October 16, 2026, with dividends reinvested.

That’s 3.4% a year compounded (CAGR) over 10 years: 1.4 times your money.

Over the same dates the same $1,000 would be worth $4,208 in the S&P 500 and $6,511 in the Nasdaq-100: WLK trailed both the S&P 500 and the Nasdaq-100.

Price only$1,198if dividends were spent

Biggest fall−75.2%May 21, 2018 to Mar 16, 2020

At a flat 5% a year$1,629a savings account's rate

Gain$400on $1,000 put in

How this period ranks#

Better than 4% of all 147 periods of 10 years since 2004.

Your dates

−50%0%140%

Worst: 1.5% a year, May 2015 to May 2025Best: 34.7% a year, Mar 2008 to Mar 2018

One scale for every length, so longer periods bunch up. Point at a bar.

Growth of $1,000 in WLK, October 17, 2016 to October 16, 2026#

Your $1,000$Your buySame plan in the S&P 500The highA low

Lowest value$591 · Mar 2020Lowest value$591 · Mar 2020Highest value$3,391 · Apr 2024$1,214 · Nov 2025$1,675 · Sep 2022$2,023 · May 2018$

$0$2,000$3,000$4,000$1,400

20182020202220242026

How far WLK was below its previous high. The biggest fall: −75.2% from May 21, 2018 to Mar 16, 2020, back to the high by Mar 10, 2022.

−75.2% from its high−64.2% from its high−41.4% from its high−12.3% from its high

high−75%

Your one buy. $1,000 on October 17, 2016, worth $1,400 on October 16, 2026. Pick Monthly or Yearly to see a plan's buys.

1.4×paid

What $1,000 would be worth on October 16, 2026, by start date#

Each point is the same amount invested that day and held to October 16, 2026, dividends reinvested. Above the line it made money.

Your start

$500$1,000$2,000$5,000$10k

20052010201520202025

$1,000 invested in WLK, by year#

Started on each year's first close and held to Oct 16, 2026, dividends reinvested.

Started	Worth Oct 16, 2026	Multiple	A year (CAGR)	Same in the Nasdaq-100
2017	$1,288	1.3×	2.6%	$6,344
2018	$669	0.67×	−4.5%	$4,742
2019	$1,071	1.1×	0.9%	$4,812
2020	$1,029	1.0×	0.4%	$3,420
2021	$855	0.85×	−2.7%	$2,373
2022	$707	0.71×	−7.0%	$1,818
2023	$688	0.69×	−9.4%	$2,741
2024	$477	0.48×	−23.3%	$1,789
2025	$591	0.59×	−25.6%	$1,403
2026	$870	0.87×	—	$1,162

Methodology#

A buy is made at the start date's close, or the next session's when the market was closed that day, and valued at the end date's close; a monthly or yearly plan buys on the same day of each month or year. "Dividends reinvested" uses split- and dividend-adjusted closes (a standard total-return approximation; taxes and fees excluded). "Price-only" uses split-adjusted closes. WLK data begins August 12, 2004; values as of October 16, 2026 and refresh daily. The ranking compares month-end to month-end periods. Past performance does not predict future returns; not investment advice.

See the live WLK chart and fundamentals on the WLK quote page or the S&P 500 return calculator.

FAQ#

How much would $1,000 invested in WLK be worth today?: $1,000 invested in WLK on October 17, 2016 would be worth $1,400 on October 16, 2026, with dividends reinvested — 3.4% a year compounded (CAGR).
How far back does the WLK calculator go?: WLK data begins August 12, 2004, with a close every session. Pick any start and end date in that span — 22 years, 2 months of history.
Does this include dividends?: Yes. The default "dividends reinvested" view uses split- and dividend-adjusted closing prices — a standard total-return approximation that excludes taxes and fees. A price-only view (split-adjusted, no dividends) is also available.

WLK return calculator