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Aclaris Therapeutics Added to the NASDAQ Biotechnology Index (NBI)

Key Takeaway: Aclaris Therapeutics, Inc. has been officially added to the Nasdaq Biotechnology Index effective December 19, 2025. This inclusion reflects the company's compliance with the index's eligibility requirements, showcasing its growth in the biopharmaceutical sector. Aclaris is dedicated to developing innovative treatments for immuno-inflammatory diseases, enhancing its visibility in the market.
Price reaction · baseline $3.14 (2025-12-19 close) · hit pre-market · clean, no other ACRS news in the window
day 0 close · peak
-2.2%

Market Sentiment Analysis

POSITIVE FACTORS

  • Aclaris Therapeutics has been added to the prestigious Nasdaq Biotechnology Index.
  • This inclusion highlights the company's growth and market recognition.
  • The company focuses on addressing unmet needs in immuno-inflammatory diseases.

BiopharmaWatch Analysis

From our catalyst data and publicly available data · not financial advice
Best trade, last catalyst
+181%
120-day peak, hindsight
Typical move
9.5%
average across 4 past catalysts
Cash runway
~25 mo
Minimal dilution risk
Lead asset
ATI-045
Phase 2 · Atopic Dermatitis

Full Press Release Details

WAYNE, Pa., Dec. 19, 2025 (GLOBE NEWSWIRE) -- Aclaris Therapeutics, Inc. (NASDAQ: ACRS), a clinical-stage biopharmaceutical company focused on developing novel product candidates for immuno-inflammatory diseases, today announced it has been added to the Nasdaq Biotechnology Index (NASDAQ: NBI), effective at the close of trading today, December 19, 2025.
The NBI is designed to track the performance of a set of securities listed on The Nasdaq Stock Market®that are classified as either biotechnology or pharmaceutical according to the Industry Classification Benchmark. Companies in the NBI must meet eligibility requirements, including minimum market capitalization, average daily trading volume and seasoning as a public company, among other criteria. The NBI is evaluated annually in December and is calculated under a modified capitalization-weighted methodology.

For more information about the Nasdaq Biotechnology Index, please visit thislink.

About Aclaris Therapeutics, Inc.

Aclaris Therapeutics, Inc. is a clinical-stage biopharmaceutical company developing a pipeline of novel product candidates to address the needs of patients with immuno-inflammatory diseases who lack satisfactory treatment options. The company has a multi-stage portfolio of product candidates powered by a robust R&D engine. For additional information, please visit www.aclaristx.com and follow Aclaris onX(formerly Twitter) at @AclarisTx and onLinkedIn.

Aclaris Therapeutics Contact:

Will RobertsSenior Vice PresidentCorporate Communications and Investor Relations(484) 329-2125wroberts@aclaristx.com

Frequently Asked Questions

What is the Nasdaq Biotechnology Index?

The Nasdaq Biotechnology Index tracks the performance of biotechnology and pharmaceutical securities listed on the Nasdaq Stock Market.

When did Aclaris join the Nasdaq Biotechnology Index?

Aclaris Therapeutics was added to the Nasdaq Biotechnology Index effective December 19, 2025.

What does Aclaris Therapeutics focus on?

Aclaris Therapeutics develops novel product candidates for immuno-inflammatory diseases.

What are the eligibility requirements for the NBI?

Companies must meet criteria like minimum market capitalization and average daily trading volume to be eligible for the NBI.

Last updated: Dec 22, 2025