Serve Anthropic, Inc. in California — Registered Agent and Service Address
Anthropic’s agent for service of process is in Sacramento, not San Francisco.
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Registered Agent Service of Process
If you have papers for Anthropic and you were planning to take them to the company’s San Francisco office, stop. California’s Secretary of State record shows the company designated a commercial registered agent at a Sacramento street address to receive service of process. That is the address on the state record.
We are a Sacramento process serving company. The Gateway Oaks agent corridor is a route we run constantly, and that counter is a short drive from our office.
Every corporation registered to do business in California has to keep an agent on file with the Secretary of State to receive service of process. For Anthropic, that agent is a corporate agent — a company, not a person — with a staffed office in Sacramento.
Here is what the California record shows.
| Field | California Secretary of State record |
|---|---|
| Entity name (California) | ANTHROPIC, INC. |
| Name in home state | ANTHROPIC, PBC |
| California entity number | 4688086 |
| Status | Active — SOS, FTB, Agent, and VCFCF standing all Good |
| Entity type | Stock Corporation – Out of State |
| Formed in | Delaware — a Delaware benefit corporation, file no. 4860621, formed 01/26/2021 |
| Registered in California | 02/03/2021 |
| Agent for service of process | CORPORATION SERVICE COMPANY WHICH WILL DO BUSINESS IN CALIFORNIA AS CSC – LAWYERS INCORPORATING SERVICE |
| Agent type | Corporate agent registered under Corporations Code section 1505 — not an individual |
| Agent service address | 2710 Gateway Oaks Drive, Suite 150N, Sacramento, CA 95833 |
| Agent designation last updated | 01/08/2026 |
| Most recent Statement of Information | 01/08/2026 — next due 02/28/2027 |
| Principal office | 500 Howard Street, San Francisco, CA 94105 |
| Mailing address | 548 Market Street, PMB 90375, San Francisco, CA 94104 (a private mailbox) |
That agent designation was refreshed on January 8, 2026, so the Sacramento address is current, not a leftover from an old filing.
One practical note about a section 1505 corporate agent: because the agent is a company rather than a named individual, there is no one person who has to be found in the building. CSC staffs a service counter at the Gateway Oaks address during business hours. From a process server’s standpoint, that makes it a predictable, repeatable serve — which is the opposite of chasing an individual.
Why Neither San Francisco Address Works for Personal Service
Both San Francisco addresses show up on the state record, and both send people in the wrong direction.
500 Howard Street is the principal office. It is where the company does business. It is not the agent designated to receive service of process, and it is not where the Secretary of State points you for that purpose.
548 Market Street, PMB 90375 is a private mailbox. “PMB” means private mailbox — a mail-receiving box at a commercial mail agency. Nobody there is designated to accept service on the corporation’s behalf. You cannot personally serve a mailbox.
The address the state record identifies for service of process is the Sacramento one: 2710 Gateway Oaks Drive, Suite 150N. Whether that route is the right one for your particular papers is a question for your attorney — but if the answer is the registered agent, the papers go to Sacramento.
If you want more detail on how that specific office works, we keep a dedicated page on it: CSC registered agent in Sacramento.
The Name on the California Registration Is ANTHROPIC, INC.
This trips people up, so here is the fact plainly.
Many documents refer to the company as Anthropic PBC. California has no registration under that name. The California entity is registered as ANTHROPIC, INC., entity number 4688086, and it carries ANTHROPIC, PBC as its name in its home state of Delaware. Both names appear on the same record. They are the same registration.
How a pleading or a set of papers is captioned is a question for the filing party or their attorney. We are not the right people to answer that, and we will not guess at it for you. What we can tell you is what the California record says, which is what you just read.
There is a second thing worth knowing before you hand anything over. ANTHROPIC PUBLIC INSTITUTIONS, LLC and ANTHROPIC BOOSTER, LLC are separate, active California registrations, and they list the same registered agent at the same Sacramento address. Same counter, different entities. Identifying which entity your papers name matters, and it matters before the serve, not after.
If you tell us the entity name on your documents, we will confirm the registered agent and service address against the current Secretary of State record before we go — at no charge, whether or not you end up hiring us.
How It Works
1. Submit Your Documents
Upload your papers through Start Your Service, or email them to us. Tell us the exact entity name that appears on your documents. If you are not sure which Anthropic entity you need, send us what you have and we will pull the current state record and tell you what it shows.
2. We Serve CSC on Anthropic, Inc.’s Behalf
A registered California process server hand-delivers your documents to the agent’s service counter at 2710 Gateway Oaks Drive, Suite 150N, Sacramento, CA 95833. We record the date, the time, and the name and description of the person who accepted them.
3. You Get Court-Ready Proof
You receive a completed, signed Proof of Service reflecting exactly what was delivered, to whom, and when — formatted for filing. If you need it filed with the court or notarized, we handle that too.
Frequently Asked Questions
Who is Anthropic, Inc.’s registered agent in California?
CORPORATION SERVICE COMPANY WHICH WILL DO BUSINESS IN CALIFORNIA AS CSC – LAWYERS INCORPORATING SERVICE. That is the exact name as filed with the California Secretary of State. It is commonly shortened to “CSC” or “CSC – Lawyers Incorporating Service.” The service address is 2710 Gateway Oaks Drive, Suite 150N, Sacramento, CA 95833.
What is Anthropic’s California entity number?
4688086. The entity is registered as ANTHROPIC, INC., a Stock Corporation – Out of State, formed in Delaware and registered in California on 02/03/2021. Its status is Active, with SOS, FTB, Agent, and VCFCF standing all showing Good.
Should the papers say Anthropic, Inc. or Anthropic PBC?
The California registration reads ANTHROPIC, INC., and it lists ANTHROPIC, PBC as the company’s name in its home state of Delaware. Both names sit on the same record. How your papers should be captioned is a legal question for you or your attorney — we do not advise on it. We will tell you what the state record says, and we will serve the documents you give us.
Can I serve Anthropic at its San Francisco office instead?
The San Francisco locations on the state record are the principal office at 500 Howard Street and a mailing address at 548 Market Street, PMB 90375 — and that second one is a private mailbox, not a staffed office. Neither is the agent designated to receive service of process. The designated agent is in Sacramento. Whether an alternative method of service is available in your situation is a question for your attorney.
There are several companies with “Anthropic” in the name. How do I know which one to serve?
ANTHROPIC, INC. (entity 4688086) is the registered corporation. ANTHROPIC PUBLIC INSTITUTIONS, LLC and ANTHROPIC BOOSTER, LLC are separate active California registrations that share the same registered agent at the same Sacramento address. Send us the entity name printed on your documents and we will verify the agent and address on the live Secretary of State record before we serve.
How fast can you serve CSC in Sacramento?
The Gateway Oaks office is a staffed commercial agent counter with regular business hours, and it is a short drive from us. It is one of the most reliable serves in the county — no locked gate, no gone-on-vacation, no wrong-apartment. Tell us your timeline and we will tell you honestly what we can hit.
What types of documents do you serve on Anthropic, Inc.?
Summons and complaints, subpoenas, deposition subpoenas and records subpoenas, small claims papers, writs, notices, and orders. If you are not sure whether a document can be served on a registered agent, send it over and we will tell you what we can and cannot do with it.
Ready to Get Started?
Submit your documents through our registered agent intake form. We handle pickup, personal service to the agent, court-ready proof of service — next-day across Sacramento County. Flat $99, no surprises. Need it same day? Add $25.
Sacramento Region We Serve
Same-day service across Sacramento County and the surrounding region. Click any city to see local details.
Sacramento Registered Process Servers · 3308 El Camino Ave, Ste 300-PMB 106, Sacramento, CA 95821 · (916) 999-1846 · Registered California Process Server 2024-027
Sacramento Registered Process Servers is an independent process serving company. We are not affiliated with, endorsed by, sponsored by, or acting on behalf of Anthropic, Inc., Anthropic, PBC, Corporation Service Company, or CSC – Lawyers Incorporating Service. We deliver legal documents and prepare proofs of service. We do not provide legal advice and we do not represent any party.
Entity information on this page is taken from the California Secretary of State’s business record for entity 4688086 and was verified on 2026-08-09. Registered agent designations change. We re-verify the agent and address against the live state record before every serve.