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Repligen Corp (RGEN) stock

RGENNasdaqBiological Products, (No Diagnostic Substances)Fiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Oct 30, 2026Score 7/30122% above fair value
$176.94−11.70 (-6.20%)

Close on Oct 30, 2026Market cap $9.99BP/E –Yield –

Price history

Repligen share prices for every week, newest first. Adjusted for stock splits, not for dividends.

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Close, Oct 30, 2026
$176.94
-6.20% on the day
52-week range
$100.99 – $198.87
-11.0% from the high
Change over 52 weeks
+22.4%
From $144.57 on Oct 30, 2025
Average volume
1.21M
Shares a day, last 90 sessions
Week ofOpenHighLowCloseChangeVolume
Oct 26, 2026$176.93$191.05$164.88$176.94+0.01%10,103,207
Oct 19, 2026$177.82$185.03$172.00$176.93+0.86%4,889,317
Oct 12, 2026$171.73$186.00$169.73$175.42+0.89%5,632,163
Oct 5, 2026$178.75$194.36$157.44$173.88-4.30%8,515,092
Sep 28, 2026$187.25$198.87$177.12$181.70-4.21%6,842,961
Sep 21, 2026$176.89$192.49$176.22$189.68+7.23%6,057,210
Sep 14, 2026$166.74$179.10$162.10$176.89+7.09%4,679,370
Sep 8, 2026$168.05$172.95$161.14$165.18-1.44%3,761,184
Aug 31, 2026$174.17$182.57$165.00$167.60-4.92%5,286,732
Aug 24, 2026$180.60$185.34$175.70$176.27-2.68%4,610,007
Aug 17, 2026$166.25$188.73$164.62$181.13+8.57%5,709,254
Aug 10, 2026$163.06$168.37$160.99$166.83+1.79%3,954,398
Aug 3, 2026$142.06$164.97$140.54$163.90+16.23%5,667,161
Jul 27, 2026$131.87$154.00$130.03$141.01+6.86%7,397,152
Jul 20, 2026$147.35$149.38$129.00$131.96-10.38%9,870,980
Jul 13, 2026$142.80$150.90$141.64$147.25+2.09%3,904,505
Jul 6, 2026$140.48$145.19$135.08$144.24+1.29%3,116,718
Jun 29, 2026$142.81$144.72$134.01$142.40-3.14%5,056,580
Jun 22, 2026$131.13$149.05$124.85$147.01+11.35%7,072,706
Jun 15, 2026$133.71$136.54$127.48$132.02+1.10%3,835,065
Jun 8, 2026$123.57$135.73$121.21$130.59+6.77%5,411,795
Jun 1, 2026$122.58$128.46$117.59$122.31-1.32%4,027,038
May 26, 2026$116.61$126.68$112.00$123.95+7.73%4,446,967
May 18, 2026$103.70$116.00$102.48$115.06+11.85%6,733,477
May 11, 2026$124.18$124.72$100.99$102.87-16.68%8,759,470
May 4, 2026$116.05$131.53$116.05$123.46+5.34%6,936,200
Apr 27, 2026$117.56$119.47$110.58$117.20-0.34%5,087,430
Apr 20, 2026$130.82$141.46$109.50$117.60-10.37%6,211,565
Apr 13, 2026$119.42$134.23$118.74$131.21+9.25%4,657,960
Apr 6, 2026$117.23$122.89$113.70$120.10+1.97%3,173,400
Mar 30, 2026$111.38$121.72$110.50$117.78+6.96%3,852,808
Mar 23, 2026$118.60$122.00$109.66$110.12-3.30%4,260,691
Mar 16, 2026$115.32$122.62$113.50$113.88-0.28%4,627,803
Mar 9, 2026$118.06$129.00$112.47$114.20-4.83%5,907,361
Mar 2, 2026$126.27$128.24$118.21$119.99-6.79%3,557,835
Feb 23, 2026$133.80$139.44$120.00$128.73-5.12%5,787,084
Feb 17, 2026$135.44$140.75$131.93$135.68-0.56%2,880,157
Feb 9, 2026$140.56$146.36$130.40$136.44-4.04%4,412,256
Feb 2, 2026$149.29$160.88$138.52$142.18-4.81%4,121,269
Jan 26, 2026$163.41$166.78$148.84$149.37-7.98%3,005,781
Jan 20, 2026$159.54$174.87$157.29$162.33+0.19%2,436,841
Jan 12, 2026$167.77$172.51$158.80$162.02-2.88%3,759,476
Jan 5, 2026$164.53$175.77$164.19$166.82+1.50%3,236,409
Dec 29, 2025$165.04$167.65$161.41$164.35-1.12%1,776,805
Dec 22, 2025$162.19$167.74$161.73$166.21+2.36%1,555,761
Dec 15, 2025$159.86$163.00$156.01$162.38+3.17%3,643,766
Dec 8, 2025$163.68$165.02$156.31$157.39-4.60%3,015,150
Dec 1, 2025$168.57$171.01$161.67$164.98-3.53%3,804,802
Nov 24, 2025$161.38$174.01$160.65$171.02+5.24%2,722,712
Nov 17, 2025$152.32$164.39$146.56$162.51+6.65%3,482,330
Nov 10, 2025$144.40$158.74$144.40$152.37+6.69%5,862,521
Nov 3, 2025$147.52$151.31$139.40$142.82-4.19%3,229,079

Seasonality

RGEN return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.

YearJanFebMarAprMayJunJulAugSepOctNovDec
Average1.2%-2.5%-2.1%2.2%2.3%2.4%13.8%6.5%-4.0%-1.2%8.9%-2.0%
Months up6 of 104 of 103 of 107 of 107 of 106 of 108 of 108 of 104 of 104 of 106 of 94 of 9
2026-8.8%-13.8%-8.5%0.4%4.8%10.1%3.3%28.3%6.2%-8.0%
202515.5%-4.2%-20.1%8.4%-14.4%5.3%-5.9%4.5%9.3%11.5%14.7%-4.2%
20245.3%2.4%-5.2%-10.7%-9.2%-15.4%32.8%-9.8%-1.4%-9.8%12.1%-4.4%
20239.4%-5.9%-3.4%-9.9%10.7%-15.8%21.3%1.4%-8.6%-15.4%16.9%14.3%
2022-25.1%-0.8%-4.4%-16.4%4.6%-1.3%31.4%2.8%-14.7%-2.5%-2.0%-5.3%
20214.4%6.2%-8.5%8.9%-13.7%9.3%23.1%15.2%2.1%0.5%-1.4%-7.6%
20208.5%-14.7%12.8%20.3%12.8%-5.6%22.1%2.7%-4.8%12.9%13.9%1.0%
20198.1%4.4%-0.7%14.0%3.1%23.7%9.8%-1.7%-17.4%3.7%11.6%4.2%
2018-2.5%-3.1%5.5%2.3%18.1%7.7%2.7%13.6%1.1%-2.2%19.3%-18.4%
2017-2.5%4.9%11.7%4.5%6.7%5.6%-2.8%8.4%-12.3%-2.9%-4.7%2.3%