Redwood National Park in Northern California

Parish Guy Castillo Practice Areas

From large corporations to small businesses to individuals, Parish Guy Castillo approaches every matter with the utmost professionalism, keeping our clients’ objectives as our top priority. Our attorneys’ strategic approach draws on experience gained from a dedicated focus on civil trials and appeals. We regularly serve as lead counsel in litigation involving claims for hundreds of millions of dollars, successfully prosecute and defend multi-million dollar jury trials, and lead effective arbitrations. A testament to our success and strong business relationships is evident in the long-term partnerships we have with clients and referring attorneys.

Parish Guy Castillo’s comprehensive complex litigation experience encompasses the following areas:


Located in one of the world’s most renowned farming regions, the attorneys at Parish Guy Castillo are deeply familiar with the legal issues that face businesses and individuals involved in agriculture. We have a long history of regularly representing growers, purchasers, processors, shippers and cooperatives in a wide range of agricultural matters, including crop damage, the Perishable Agricultural Commodities Act (PACA) and claims regarding product quality.

Antitrust and Unfair Competition

Antitrust laws and regulations are designed to foster competition and promote consumer welfare. Disputes often result in litigation that involves allegations of monopolization, price-fixing and agreements and activities that restrict fair play. These complex matters regularly proceed as class actions, and, in many cases, involve entire industries. Our attorneys possess the proven ability and skills to successfully manage and oversee the most sophisticated antitrust and unfair competition litigation.

Appeals and Writs

Appellate practice involves an entirely different set of skills and strategic considerations than that of trial practice. Parish Guy Castillo is equally adept at handling appeals where the firm has been extensively involved in the trial court proceedings or stepping in as appellate counsel to defend judgments obtained and seeking reversal of unjust results in the trial court.


Banking and financial litigation typically arises over specific loans, trades, transactions or financial products. Parish Guy Castillo is experienced in representing corporate and individual clients in a wide spectrum of matters involving federal securities laws, as well as state corporate, consumer, securities and common laws. Representative matters include, breach of contract claims, shareholder class actions and derivative suits challenging the validity of disclosures and the appropriateness of transactions, as well as suits alleging insider trading, broker-dealer non-compliance, misrepresentations in financial reporting and securities or other fraud.

Business Litigation

Business or commercial litigation, involving virtually every type of dispute that can arise in the business context, has always been a strong focus of Parish Guy Castillo. These matters may include breach of contract cases, partnership/joint venture disputes, class actions, business torts, civil RICO claims, breach of fiduciary duty allegations, and shareholder issues. In addition to representing a wide variety of businesses and individuals in every aspect of business litigation in California and federal courts, the firm also has experience handling these cases in private arbitrations and mediations.

Successful commercial litigators need to be able to assess the merits of a dispute and scale either a prosecution or defense that fits the legal and business needs of the client. Efficiency, creativity and sound judgment are critical for intelligently positioning these disputes. While all cases must be litigated with an eye towards ultimately trying them, seasoned trial attorneys understand that at all times they must strive to achieve the best possible result at a reasonable cost.

Class Actions

The subject matter of class action lawsuits can vary widely, requiring a specialized legal skillset. The lawyers at Parish Guy Castillo have the experience to successfully pursue, handle and oversee these cases. Efficiently working on these cases, whether as a plaintiff or defendant, is extremely important as a timely and fair resolution is often the ultimate goal.


Providing on-going and practical legal advice to participants in the construction industry, including developers, owners, general contractors and subcontractors, material suppliers, architects, engineers, banks, sureties and insurance companies, is a focus of the firm. We regularly assist our construction clients in construction defect litigation and with litigation related to contract disputes, mechanic liens and collection of construction debts.

Corporations and Partnerships

Parish Guy Castillo is versed in handling litigation relating to corporations, partnerships and limited liability companies. Our experience includes representing both plaintiffs and defendants in director and officer liability cases, alter ego claims, shareholder derivative lawsuits, breach of fiduciary duty claims and actions for dissolution. Efficient and cost effective resolution is often the ultimate goal, and our attorneys ensure that this is done in a fair and equitable manner.

Creditors’ Rights

Parish Guy Castillo represents clients as creditors in a variety of cases, stemming from any action involving collection of a money judgment. Parish Guy Castillo can handle post-judgment enforcement in state and federal courts. Our attorneys also have experience in collection actions, and in obtaining pre-judgment remedies, such as writs of attachment, writs of possession or establishing a receivership. These cases are often time sensitive and require a timely and concentrated approach to resolution.

Eminent Domain

Parish Guy Castillo practices eminent domain law and has the experience and knowledge to successfully navigate through the complex laws regulating these proceedings that are governed by a comprehensive statutory scheme. These matters, which can greatly impact an individual or business entity, are often time sensitive and require an assertive approach.


The attorneys at Parish Guy Castillo represent individuals and employers in employment disputes. Our experienced team has handled a wide range of matters in this area, including wage and hour claims, wrongful termination, discrimination, harassment, and non-competition-non-solicitation cases. Having the benefit of representing both plaintiffs and defendants provides us with a unique perspective to anticipate challenges and respond accordingly.

Personal Injury and Product Liability

The term “personal injury” applies to a wide range of claims that arise when one party believes that his or her injuries were caused by another party or product. Parish Guy Castillo’s personal and product liabilities’ practice includes automobile, motorcycle and boating accidents, wrongful death, defective products and toxic and chemical injuries. Over many years, our attorneys have handled a wide variety of cases involving the physical and emotional injuries of accident victims. Parish Guy Castillo not only represents personal injury plaintiffs, but we also represent defendants, thus expanding our knowledge and understanding in this arena.

Professional Liability

Professional liability claims are brought by patients or clients who have suffered damages as a result of the negligent actions of a professional, such as a doctor, other medical providers, attorneys, engineers, architects, CPAs, securities brokers and other financial advisors, real estate agents and tax professionals. Members of all these professions can commit errors and omissions that result in damage to their clients. Parish Guy Castillo represents both plaintiffs and defendants in professional liability matters, giving us a unique perspective to successfully resolve these cases for our clients.

Real Estate

Parish Guy Castillo’s real estate litigation clients are diverse and include landowners, developers, contractors, brokers, lenders, investors and public entities. Since disputes involving real estate can be as varied as the parties and the projects themselves and regularly arise out of the often-complicated and interrelated contracts of the various parties with interests in the property, our attorneys approach their cases with practical, results-oriented plans that are tailored to the needs and budget of the particular client. Tort claims of various kinds may be asserted, from fraud and tortious interference, to more real estate-specific claims, such as trespass, encroachment, nuisance, quiet title and unlawful detainer. Special insurance rights, such as title and builder’s risk policies, may be implicated. The attorneys at Parish Guy Castillo have a comprehensive understanding of the contractual relations, business goals and equitable and tort concepts unique to real estate matters.


Securities litigation, involving a wide range of disputes, including shareholder class actions, are frequently premised on claims of fraud, challenges to mergers and acquisitions, charges that public auditing firms have violated securities laws, arbitrations against broker-dealers and derivative actions against directors and officers. These disputes are litigated in diverse venues, including federal courts and private arbitrations. Regardless of the setting, the attorneys at Parish Guy Castillo are passionate and persuasive advocates.

Trade Secrets

In today’s global economy, intense competition, employee mobility and the proliferation of spin-off and start-up businesses make the protection of trade secrets critical. Leading corporations and innovators easily recognize the need for strong patent protection, but often overlook the formulas, devices, techniques, patterns, processes, data compilations and methods that surround patents and bring breakthrough products to market. Often, this intellectual property or trade secrets cannot be protected by patent law and other means of safeguarding is necessary. With these measures in place, businesses and individuals can protect enforceable trade secret rights and be ready to act when the need arises. When litigation becomes necessary to protect our clients’ trade secrets or to address a challenge from a competitor, Parish Guy Castillo has the necessary experience to assist.

Trusts and Estates Litigation

The attorneys at Parish Guy Castillo attack and defend wills, trusts and other estate planning documents that are contested on the grounds of mental incapacity or undue influence. Our clients range from fiduciaries, such as trustees, executors or administrators, to beneficiaries who have been unable to obtain information, documents or distributions from fiduciaries. We also litigate financial elder abuse claims.