Cisco Systems, Inc.
Company History
Cisco History: Founding, Growth & Key Milestones
Founded 1984 in San Francisco, United States
When was Cisco founded?
Cisco was founded in 1984 in San Francisco, United States by Leonard Bosack and Sandy Lerner, making it 42 years old.
- Founded
- 1984
- Founding place
- San Francisco, United States
- Founders
- Leonard Bosack and Sandy Lerner
- Headquarters today
- San Jose, California
- Milestones documented
- 12 (1984–2025)
- Current CEO
- Chuck Robbins
- Acquisitions
- 7
| Year | Event |
|---|---|
| 1984 | Company Founded at Stanford University |
| 1986 | First Commercial Router Shipped |
| 1990 | Initial Public Offering on NASDAQ |
| 1995 | John Chambers Becomes CEO |
| 2000 | Briefly Becomes World's Most Valuable Company |
| 2003 | Acquisition of Linksys |
| 2012 | Meraki Acquisition Launches Cloud-Managed Networking |
| 2015 | Chuck Robbins Appointed CEO |
| 2017 | AppDynamics Acquisition for $3.7 Billion |
| 2020 | Webex Usage Surges During COVID-19 Pandemic |
| 2024 | $28 Billion Splunk Acquisition Completed |
| 2025 | AI Infrastructure Orders Exceed $2 Billion |
- Where was Cisco founded?
- Cisco was founded in San Francisco, United States in 1984. wikidata.org
- Who founded Cisco?
- Cisco was founded by Leonard Bosack and Sandy Lerner.
- When did Cisco start?
- Cisco was founded in 1984.
- How old is Cisco?
- Cisco is 42 years old as of 2026.
- How did Cisco start?
- Cisco was founded in 1984 by Leonard Bosack and Sandy Lerner, a husband-and-wife team working in the computer facilities at Stanford University.
Founding Story
In 1984, Leonard Bosack and Sandy Lerner were married, but worked in different departments at Stanford University. Bosack managed the computer science department's network, and Lerner managed the business school's network. The two computer systems spoke completely different digital languages and couldn't communicate. Desperate to send messages to each other across campus, they essentially hot-wired the networks together, inventing a physical 'router' that translated the protocols. Realizing that every university and corporation in the world would eventually need this technology to connect, they founded Cisco (short for San Francisco).
Founders
Leonard Bosack
Cisco Systems possesses one of the most famous, romanticized, and ultimately contentious founding stories in the history of Silicon Valley. The company was founded in 1984 by a husband-and-wife team, Leonard Bosack and Sandy Lerner. They were both effective computer scientists working at Stanford University, Bosack managed the computer science department's mainframe computers, while Lerner managed the computers at the Graduate School of Business. The foundational technological breakthrough that birthed the company was born out of a simple, romantic necessity: they wanted to be able to email each other. However, the computer networks in their respective departments used entirely different, incompatible protocols. They could not communicate. To solve this, they designed and built a complex, multi-protocol router, a device that could translate the disparate languages of different networks, allowing them to essentially 'talk' to one another. They connected the two departments, effectively creating the first practical campus-wide local area network (LAN). Realizing the commercial implications of this technology, they founded Cisco (named after the city of San Francisco, famously retaining the lowercase 'c' in early logos and mimicking the Golden Gate Bridge). They initially built routers in their living room and funded the company by heavily mortgaging their house and running up credit card debt. In 1987, seeking scale, they brought in Don Valentine of Sequoia Capital, a well-known, aggressive venture capitalist. Valentine provided funding but demanded corporate control, eventually bringing in a seasoned then-CEO, John Morgridge. The relationship between the founders and the hard-nosed, professional management team violently deteriorated. In 1990, shortly after Cisco executed a successful IPO that made the founders very wealthy, the board ousted Sandy Lerner. In a display of solidarity and disgust with the corporate culture, Leonard Bosack immediately resigned. While the founders walked away with $170 million, they lost control of the company they built, a company that would eventually achieve a very large $500 billion valuation. Leonard Bosack was born in 1952. Education: La Salle College High School.
Sandy Lerner
Sandy Lerner co-founded Cisco Systems in December 1984 with her then-husband Leonard Bosack, driven by the practical need to connect Stanford University's incompatible computer networks. Lerner's role at Cisco extended far beyond co-founding, she built the company's customer service organization, managed its finances during the bootstrapped early years, and established the customer-centric culture that helped Cisco win its first enterprise accounts. Her ability to translate complex networking technology into business value propositions proved essential in convincing early customers to trust their critical infrastructure to an unproven startup. However, Lerner's management style clashed with the professional executives brought in by venture capitalist Don Valentine after Sequoia Capital's 1987 investment. In 1990, shortly after Cisco's IPO Lerner was fired by then-CEO John Morgridge. She and Bosack sold their combined Cisco stake for approximately $170 million. Lerner subsequently founded Urban Decay cosmetics (sold to LVMH for $350 million in 2012) and purchased Aston Farm in England, where she raises rare-breed livestock and maintains a working Elizabethan-era estate. Sandy Lerner was born in 1955 in California. Education: California State University, Chico; Claremont Graduate University.
Key Milestones
Company Founded at Stanford University
Leonard Bosack and Sandy Lerner incorporate Cisco Systems in December 1984, commercializing multi-protocol router technology developed to connect Stanford's campus networks.
Source: en.wikipedia.orgFirst Commercial Router Shipped
Cisco ships its first commercial multi-protocol router, the AGS (Advanced Gateway Server), generating $1.5 million in first-year revenue as the internet begins its transition from research network to commercial infrastructure.
Source: en.wikipedia.orgInitial Public Offering on NASDAQ
Cisco goes public at a valuation of approximately $224 million, raising capital that would fuel its aggressive acquisition strategy. The IPO also precipitated the departure of both founders.
Source: en.wikipedia.orgJohn Chambers Becomes CEO
John Chambers takes over as CEO from John Morgridge, beginning a 20-year tenure that would see Cisco grow from $2 billion to over $47 billion in annual revenue through more than 180 acquisitions.
Source: en.wikipedia.orgBriefly Becomes World's Most Valuable Company
Cisco's market capitalization exceeds $500 billion in March 2000, briefly surpassing Microsoft and GE as the world's most valuable company before the dot-com crash erased over $400 billion in shareholder value.
Source: en.wikipedia.orgAcquisition of Linksys
Cisco acquires consumer networking company Linksys for $500 million, marking its entry into the home networking market and establishing a consumer brand that would later be divested to Belkin in 2013.
Source: en.wikipedia.orgMeraki Acquisition Launches Cloud-Managed Networking
Cisco acquires cloud-managed networking startup Meraki for $1.2 billion, gaining the platform that would become central to its small-and-medium business strategy and its broader shift toward subscription-based management.
Source: en.wikipedia.orgChuck Robbins Appointed CEO
Chuck Robbins succeeds John Chambers as CEO, inheriting a mandate to transform Cisco from a hardware company into a software-and-subscription platform business capable of competing in the cloud era.
Source: en.wikipedia.orgAppDynamics Acquisition for $3.7 Billion
Cisco acquires application performance monitoring company AppDynamics for $3.7 billion just days before its planned IPO, signaling Cisco's strategic commitment to the observability and application intelligence market.
Source: en.wikipedia.orgWebex Usage Surges During COVID-19 Pandemic
Webex usage explodes to over 600 million meeting participants per month during the pandemic, temporarily positioning Cisco's collaboration platform as a critical piece of global remote work infrastructure.
Source: en.wikipedia.org$28 Billion Splunk Acquisition Completed
Cisco completes its largest-ever acquisition, purchasing cybersecurity and observability company Splunk for $28 billion in cash, pushing subscription revenue past 51% of total sales and establishing Cisco as a major force in security operations.
Source: en.wikipedia.orgAI Infrastructure Orders Exceed $2 Billion
Cisco's AI infrastructure orders from hyperscale customers surpass $2 billion in FY2025, more than doubling management's original target and validating the company's investment in Silicon One-based networking platforms for GPU cluster interconnection.
Source: en.wikipedia.orgMajor Acquisitions
Splunk
2024Cisco's largest-ever acquisition, designed to combine networking data with Splunk's security and observability platform to create an unified AI-driven security and monitoring solution.
AppDynamics
2017Acquired the application performance monitoring leader to extend Cisco's visibility from network infrastructure into application-layer performance, enabling full-stack observability.
Meraki
2012Acquired the cloud-managed networking pioneer to bring simplified, subscription-based network management to small and mid-sized businesses a market Cisco's complex CLI-based products struggled to serve.
StrataCom
1996Acquired to enter the ATM and Frame Relay switching market during the telecom boom, giving Cisco products for service provider wide-area networks.
Sourcefire
2013Cisco Systems, Inc. acquired Sourcefire in 2013.
Linksys
2003Cisco Systems, Inc. acquired Linksys in 2003.
Starent Networks
2009Cisco Systems, Inc. acquired Starent Networks in 2009.
Keep researching Cisco
Cisco Company History FAQ
When was Cisco Systems founded and what was its first product?
Cisco Systems was founded in December 1984 in California by Stanford computer scientists Leonard Bosack and Sandy Lerner, releasing the Advanced Gateway Server (AGS) multi-protocol router in 1986.
When did Cisco complete its initial public offering on NASDAQ?
Cisco completed its initial public offering on the NASDAQ stock exchange on February 16, 1990, under ticker symbol CSCO, raising $50 million at a market valuation of $224 million.
How did Cisco become the most valuable company in the world in March 2000?
During the peak of the dot-com internet boom on March 27, 2000, Cisco's market capitalization reached $555 billion ($80.06 per share), briefly making it the most valuable publicly traded corporation on earth.
How did Cisco handle the 2001 dot-com crash?
Following the telecom and dot-com collapse, then-CEO John Chambers restructured Cisco, wrote down excess optical inventory, refocused on enterprise switching, and expanded into IP telephony, wireless, and network security.
When did Cisco initiate its regular quarterly cash dividend?
In March 2011, Cisco initiated its first regular quarterly cash dividend, signaling a new era of capital maturity and beginning a 13+ year streak of consecutive annual dividend increases.
When did Chuck Robbins become CEO and launch Cisco Silicon One?
Chuck Robbins was appointed CEO in July 2015, launching Cisco Silicon One unified semiconductor architecture in December 2019 and accelerating the transition to recurring software subscriptions.
When did Cisco complete the $28 billion acquisition of Splunk?
In March 2024, Cisco finalized the landmark $28 billion cash acquisition of Splunk, uniting global networking infrastructure with enterprise AI data observability and security.
What is Cisco Systems' position in the global technology industry today?
Today, Cisco is one of the largest enterprise networking and security companies, with record FY2026 revenue of $63.3 billion, about 82,400 employees, and a fast-growing AI infrastructure business that booked $9.3 billion in hyperscaler orders in FY2026.
Where did the name Cisco come from?
The name "Cisco" is simply short for San Francisco. The company was founded in 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who needed a way to connect different computer networks across the campus.
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