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Charlene Sun

Counsel | She/Her/Hers
Counsel | She/Her/Hers
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Areas of Focus

Overview

Charlene Sun is a counsel in Crowell & Moring’s Orange County office and is a member of the firm’s Antitrust and Competition Group. Charlene's practice involves counseling clients across a number of industries on a wide range of antitrust transactional and litigation matters. Charlene has provided strategic counsel with identifying and coordinating foreign merger control filings, compliance with the Hart-Scott-Rodino Act, and evaluating and advising on competitive issues associated with mergers, acquisitions, and competitor collaborations. She has also represented Fortune 500 companies as plaintiffs in antitrust recovery actions.

While Charlene was in law school, she served as an editor of the UC Irvine Law Review. She participated in various pro bono projects, which included work on cases concerning asylum, bankruptcy, and domestic violence.

Charlene serves as co-chair of the LGBTQ+ Affinity group, where she focuses on promoting equity, inclusion, and opportunity within the firm.

Career & Education

    • Chapman University, B.S., business administration, 2015
    • University of California, Irvine School of Law, J.D., magna cum laude, 2019
    • Chapman University, B.S., business administration, 2015
    • University of California, Irvine School of Law, J.D., magna cum laude, 2019

    • California
    • Minnesota
    • California
    • Minnesota

Charlene's Insights

Client Alert | 4 min read | 02.24.26

State-Level Merger Control Grows: California Joins “Mini-HSR” Trend with Senate Bill 25

On February 10, 2026, California enacted Senate Bill 25 (“SB 25”), known as the California Uniform Antitrust Pre-Merger Notification Act. The new law takes effect on January 1, 2027, making California the third state—following Washington (effective July 27, 2025) and Colorado (effective August 6, 2025)—to implement a “mini-HSR” regime modeled after the Uniform Antitrust Pre-Merger Notification Act (“UAPNA”). The legislation reflects the growing state-level focus on merger oversight, and it signals California’s continuing intent to increase early pre-merger scrutiny and concurrent review of transactions with federal authorities....

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Insights

Client Alert | 4 min read | 02.24.26

State-Level Merger Control Grows: California Joins “Mini-HSR” Trend with Senate Bill 25

Firm News | 2 min read | 09.30.25

OCCDL Recognizes Crowell & Moring Lawyers at 2025 Awards Gala

Blog Post | 07.03.25

FTC Orders Divestitures in Retail Fuel Outlet Deal and Signals a Return to More Standard Remedy Discussions

Client Alert | 4 min read | 07.02.25

FTC Orders Divestitures in Retail Fuel Outlet Deal and Signals a Return to More Standard Remedy Discussions

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Practices

Charlene's Insights

Client Alert | 4 min read | 02.24.26

State-Level Merger Control Grows: California Joins “Mini-HSR” Trend with Senate Bill 25

On February 10, 2026, California enacted Senate Bill 25 (“SB 25”), known as the California Uniform Antitrust Pre-Merger Notification Act. The new law takes effect on January 1, 2027, making California the third state—following Washington (effective July 27, 2025) and Colorado (effective August 6, 2025)—to implement a “mini-HSR” regime modeled after the Uniform Antitrust Pre-Merger Notification Act (“UAPNA”). The legislation reflects the growing state-level focus on merger oversight, and it signals California’s continuing intent to increase early pre-merger scrutiny and concurrent review of transactions with federal authorities....

View All Insights