When was Arcellx Founded?

Arcellx was founded in 2014.

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Where is Arcellx incorporated?

Arcellx was incorporated in 2014 as a Delaware corporation.

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Where is Arcellx’s corporate headquarters?

Arcellx’s principal executive offices are located at 25 West Watkins Mill Road, Suite A, Gaithersburg, Maryland 20878.

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When did Arcellx go public?

Arcellx priced its initial public offering (IPO) on February 4th, 2022.

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On what stock exchange and under what symbol are Arcellx shares traded?

Arcellx is listed on The Nasdaq Global Select Market under the ticker symbol ACLX.

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How do I transfer stock, change the address on my shareholder account, or replace a lost stock certificate?

Please contact Arcellx’s transfer agent:

Website: www.computershare.com/investor

Telephone inquiries: 1-800-736-3001(US, Canada, Puerto Rico)

Written requests: Computershare
PO Box 505000
Louisville, KY 40233-5000

By overnight delivery: Computershare
462 South 4th Street, Suite 1600
Louisville, KY 40202

Email: web.queries@computershare.com

Shareholder online inquiries: https://www- us.computershare.com/investor/contact

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Does Arcellx issue dividends on its common stock?

Arcellx does not pay cash dividends on its common stock and does not anticipate doing so in the foreseeable future.

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Does Arcellx have a direct stock purchase plan?

Arcellx does not offer a direct stock purchase plan. Arcellx stock may be purchased through a licensed securities broker.

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What is Arcellx’s CUSIP?

The Arcellx CUSIP number is 03940C 100

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Who is Arcellx’s independent auditor?

Arcellx’s independent auditors are Ernst & Young LLP.

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When does Arcellx’s fiscal year ended?

Arcellx’s fiscal year end is December 31st.

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Who can I contact for more information?

For more information on Arcellx, please contact Investor Relations at ir@arcellx.com

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What are the locations that Arcellx operates in?

Arcellx has operations in Gaithersburg, MD and Foster City, CA.

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