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RGEN
$175.42-4.75%
as of close, Oct 16, 2026
☾ AH $175.42 -4.75%
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Repligen Corporation drawdown: 45.9% below the all-time high (price)

Repligen Corporation is 45.9% below its all-time high, set Sep 23, 2021 (as of market close, Oct 16, 2026), measured on price alone — dividends are not included, the convention headlines and crash histories use. The chart shows every day as a percentage of the highest level reached up to that point: 100% means a fresh record, everything below is a drawdown.

Below all-time high
−45.9%
54.1% of ATH
All-time high
$324.21
Sep 23, 2021
Time below the high
5.1 yrs
since Sep 23, 2021
Worst-ever drawdown
−98.3%
Jul 15, 1996
Longest underwater
23.4 yrs
between all-time highs
Today's level first reached
Oct 22, 2020
6.0 yrs ago
Last time this deep
Jun 21, 2016
in a previous episode

% of all-time high since 1990: price#

The classic underwater chart (drawdown curve), drawn as % of the all-time high — 100% is a fresh record, everything below it is time spent underwater. Basis and range are in the URL, so a particular view is a link.

Basis
Range
All-time high = 100%20%40%60%80%
RGEN close · log0.502.0010.0050.00200
1995200020052010201520202025

The deepest drawdowns on record#

Every decline of 15% or more from an all-time high (price basis), deepest first.

PeakTroughDepthPeak → troughRecovered byUnderwater
Oct 22, 1991Jul 15, 1996−98.3%4.7 yrsMar 13, 201523.4 yrs
Jun 14, 1990Sep 28, 1990−71.0%3 moSep 19, 199115 mo
Sep 23, 2021May 15, 2026−68.3%4.6 yrsnot yet5.1 yrs+
Jul 7, 2015Feb 8, 2016−50.3%7 moJun 23, 20172.0 yrs
Sep 18, 2017Feb 8, 2018−32.9%5 moJun 22, 20189 mo
Nov 8, 2018Dec 24, 2018−29.9%46 daysApr 26, 20196 mo
Feb 12, 2021May 17, 2021−26.7%3 moJul 27, 20215 mo
Aug 1, 2019Oct 2, 2019−22.7%2 moJan 9, 20205 mo

Price basis (no dividends) — the convention crash histories use. With dividends reinvested, recoveries arrive years earlier; switch the basis on the chart above to see it.

Drawdown vs what came next#

One dot per month since 1990: how far Repligen Corporation stood below its all-time high, and the total return over the following 1, 5 and 10 years.

1950–19992000–today

Read this with survivorship bias in mind: a single asset's history is one surviving sample, so past recoveries here say little about the odds ahead. Monthly windows also overlap heavily (they are not independent samples). Not investment advice.

FAQ#

How far is Repligen Corporation from its all-time high?
Repligen Corporation is currently 45.9% below its all-time high, set Sep 23, 2021 (as of market close, Oct 16, 2026). Prices only, the convention headlines use; with dividends reinvested the gap is usually smaller.
What was the biggest Repligen Corporation drawdown ever?
The deepest decline on record in our data (since 1990) took Repligen Corporation 98.3% below its prior high, bottoming Jul 15, 1996. The table on this page lists every major episode with its peak, trough and recovery date.

Methodology & related#

Daily data since -1 from RGEN; no free deep history exists for Repligen Corporation — for a 150-year drawdown record see the S&P 500 drawdown page. The price basis excludes dividends; the total-return basis reinvests them; the real basis additionally deflates by CPI. See also returns by year. Past performance does not predict future returns; not investment advice.

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