Nathan Campbell

Nathan Campbell

Partner

Nathan Campbell is a trial lawyer representing both plaintiffs and defendants. Over the course of ten trials and arbitrations, his clients have won verdicts or awards collectively of over $40 million and defeated claims collectively of over $232 million.

While focusing on complex commercial litigation, Mr. Campbell handles cases in many areas, including healthcare, energy, trade secrets, executive employment, and construction.

Peer-review and other publications have repeatedly recognized Mr. Campbell for his practice. He has been named to “Best Lawyers: Ones to Watch” for commercial litigation every year since 2021. This is a national peer review award. He has also been named as a Texas Rising Star, compiled by Thomson Reuters’ Texas Super Lawyers, every year since 2021. Mr. Campbell is a Texas Bar Foundation Fellow.

A Harvard Law grad, Mr. Campbell was an article editor of the Harvard Journal of Law & Technology in law school and volunteered as a student attorney at the Harvard Prison Legal Assistance Project.

Prior to law school, Mr. Campbell served as a paralegal in the Boston office of the U.S. Attorney’s Office for the District of Massachusetts, where he assisted in False Claims Act investigations and litigation.

Mr. Campbell is also a graduate of the College of Holy Cross and completed intensive post-graduate Mandarin language training at National Taiwan University in Taipei, Taiwan.

Mr. Campbell works primarily out of New York City.

Representative Results

In 2024, Mr. Campbell worked in concert with the federal government to help secure the largest settlement ever for Medicare fraud over concurrent surgery claims. AZA saw their whistleblower client receive $3 million of the recovery.
In a 2024 business divorce trial where the plaintiff presented damages of up to $82 million, a Harris County jury unanimously found he should take nothing and returned a verdict in favor of AZA’s clients. Mr. Campbell delivered the opening statement for his clients and examined multiple witnesses, including a damages expert.
In 2023, a Harris County jury awarded AZA’s energy client $2.4 million in attorney’s fees in a breach of contract case arising from a $90 million asset purchase. The seller sought approximately $30 million from Mr. Campbell’s client but took nothing. Mr. Campbell presented at opening, and took such key witnesses as the client’s Chief Financial Officer, and the opposing party’s damages expert.
In 2023, after a complex six-week case involving the construction of Houston Midtown apartments, a Harris County jury awarded Mr. Campbell’s clients $32.5 million. Mr. Campbell presented at opening, argued during closing, and presented or cross-examined five witnesses.
In 2022, Mr. Campbell helped try and win a multimillion dollar three-week jury trial involving breach of contract and breach of fiduciary duty on behalf of a national energy company.
In 2021, the Supreme Court of Texas affirmed the Second Court of Appeals’ judgment enforcing an arbitration provision, which paved the way for the firm’s client to proceed against its counterparty to recover in excess of $15 million under an indemnity provision. Mr. Campbell helped draft the appellate briefing.
In 2021, Mr. Campbell successfully settled a case for a commercial property owner and management company on a seven-figure premises liability lawsuit.
In 2020 and 2018, Mr. Campbell successfully defended motions for summary judgment on two separate eight-figure claims, in which he primarily drafted the briefing and argued the defense at the summary judgment hearings. One case involved executives seeking compensation and benefits from their current employer. The second involved a mixed-use property developer seeking damages against a contractor and a surety on an over $60 million project.
In 2020, Mr. Campbell cross-examined two key witnesses, directly examined a third, and delivered closing arguments in an international commercial arbitration over a commodity trading dispute. In addition to awarding his client damages, the arbitration award quoted Mr. Campbell’s cross-examination of the opposing party’s principal when disposing of an entire counterclaim in favor of Mr. Campbell’s client.
In 2019, Mr. Campbell was lead counsel in a successful bench trial on attorney’s fees and declaratory judgment in a tech start-up investor dispute. The Court found that the firm’s client was entitled to preferred stock rather than common stock, as the defendant was arguing.
In 2019, he successfully argued and defended summary judgment for briefing on land-use restrictions where he was the primary author. Following the summary judgment hearing, the judge unexpectedly indicated that he wanted to conduct a bench trial on the case in five days. Mr. Campbell led the trial preparation efforts and showed up ready to try the case on the fifth day. The opposing party caved in a settlement favorable to Mr. Campbell’s client before opening statements. The result was the preservation of a century-old deed restriction that has helped maintain the aesthetic and charm of a Montrose neighborhood from a developer threatening to sue neighbors and the civic association who were attempting to enforce the restrictions. This matter was handled on a pro bono basis.
In 2018, the firm’s client was awarded damages in an arbitration after the respondent ordered specialty-manufactured goods used in oil field services and did not pay for them.
In 2017, Mr. Campbell successfully excluded an opposing party’s expert after deposing the expert, drafting the motion to exclude, and arguing the motion in court. The case was a construction dispute between a property owner whose building flooded following rain and the engineer who designed the building.
In 2016, Mr. Campbell was on the trial team for a janitorial contractor who hired AZA to end a nearly 10-year-old case against a union that lied about the cleaning company and caused the company to lose business. AZA stopped the stalling, got the case to trial, and obtained a jury verdict that, with interest added, totaled $7.8 million for the firm’s client. The case made national news.
In 2015, National Oilwell Varco was sued for $120 million by eight former employees claiming they were treated differently because of their race. Mr. Campbell joined the trial team after the client offered a substantial settlement that was refused. The client won a take-nothing verdict in a hard-fought case where plaintiffs were represented by a high-profile civil rights lawyer.

Education

Harvard Law School, J.D., May 2015
- Harvard Journal of Law & Technology, Article Editor
- Harvard Prison Legal Assistance Project, Student Attorney
College of the Holy Cross, B.A. summa cum laude, May 2008
- Political Science and Chinese Language and Civilization,
- Phi Beta Kappa
- Rev. George King, S.J., and Richard Keenan Prize for Proficiency in Political Science
National Taiwan University, Taipei, Taiwan
- Huayu Enrichment Scholar at the International Chinese Language Program, Fall 2008 – Spring 2009
- Awarded Republic of China Ministry of Education Huayu Enrichment Scholarship to pursue intensive Mandarin language training

Bar Admissions

State Bar of New York
State Bar of Texas
U.S. District Courts for the Southern District of New York
U.S. District Courts for the Southern District of Texas
U.S. District Courts for the Eastern District of Texas
U.S. District Courts for the Northern District of Texas
U.S. Fifth Circuit Court of Appeals

Honors and Awards

2021 – 2027 lists of Best Lawyers: Ones to Watch
2021 – 2026 lists of Texas Rising Star honors as presented by Super Lawyers, a Thomson Reuters Business
2026 – 2027 Lawdragon 500 Leading Litigators in America
Texas Bar Foundation Fellow