Historical Stock Price
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Video: Compound Annual Growth Rate (CAGR) Definition
Date Open High Low Close Volume
09/04/2026 $8.14 $8.38 $7.99 $8.24 986.20K
09/08/2026 $8.14 $8.18 $7.42 $7.43 1.21M
09/09/2026 $7.60 $7.61 $6.78 $6.86 1.45M
09/10/2026 $6.76 $7.04 $6.66 $6.89 893.60K
09/11/2026 $6.93 $7.02 $6.70 $6.94 790.50K
Agenus Inc. is an immuno-oncology (I-O) company targeting cancer and infectious diseases with a pipeline of immunological agents. It is specialized in developing therapies to activate the body's immune system against cancer and infections. Its pipeline includes immune-modulatory antibodies, adoptive cell therapies (via MiNK Therapeutics, Inc.), and vaccine adjuvants (via SaponiQx, Inc.). Its primary focus is I-O, and its diverse pipeline is supported by its in-house capabilities, including current good manufacturing practice (cGMP) manufacturing and a clinical operations platform.
AGEN historical stock prices picture
Agenus (AGEN) has the following price history information. Looking back at AGEN historical stock prices for the last five trading days, on September 04, 2026, AGEN opened at $8.14, traded as high as $8.38 and as low as $7.99, and closed at $8.24. Trading volume was a total of 986.20K shares. On September 08, 2026, AGEN opened at $8.14, traded as high as $8.18 and as low as $7.42, and closed at $7.43. Trading volume was a total of 1.21M shares. On September 09, 2026, AGEN opened at $7.60, traded as high as $7.61 and as low as $6.78, and closed at $6.86. Trading volume was a total of 1.45M shares. On September 10, 2026, AGEN opened at $6.76, traded as high as $7.04 and as low as $6.66, and closed at $6.89. Trading volume was a total of 893.60K shares. On September 11, 2026, AGEN opened at $6.93, traded as high as $7.02 and as low as $6.70, and closed at $6.94. Trading volume was a total of 790.50K shares.

AGEN Historical Stock Prices By Date:

AGEN historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into Agenus shares, starting with a $10,000 purchase of AGEN, and working forward through the historical stock price information to today.

Growth of $10,000.00
Without Dividends Reinvested

Start date: 09/14/2016
End date: 09/11/2026
Start price/share: $128.00
End price/share: $6.94
Dividends collected/share: $0.00
Total return: -94.58%
Average Annual Total Return: -25.29%
Starting investment: $10,000.00
Ending investment: $542.17
Years: 10.00
Date Close
09/04/2026$8.24
09/08/2026$7.43
09/09/2026$6.86
09/10/2026$6.89
09/11/2026$6.94
AGEN is categorized under the Healthcare sector; below are some other companies in the same sector:

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Also explore: AGEN shares outstanding history

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