Adda Quinn is best known as the first wife of Oracle co-founder Larry Ellison, but reducing her story to a seven-year marriage misses most of what happened afterward. She knew Ellison before Oracle existed, when he was still a young programmer trying to find his direction. After their 1974 divorce, Adda built a substantial career at the Electric Power Research Institute, became involved in environmental research and later turned her scientific knowledge toward protecting equestrian access to public trails.
The first two photographs above are real images identified as Adda Quinn, including a portrait preserved by a Campbell High School alumni site and a later photograph showing her with a dog. The third is a real official portrait of Larry Ellison, included because his early marriage to Adda is the reason many readers first discover her.
Her later story is surprisingly different from the billionaire world associated with Ellison.
It includes environmental science, contaminated-soil research, horses, community advocacy, a second marriage and decades spent largely outside celebrity attention.
Adda Quinn Quick Bio
| Detail | Information |
|---|---|
| Full Name | Adda Quinn |
| Known For | First wife of Larry Ellison |
| First Husband | Larry Ellison |
| Marriage | 1967–1974 |
| Children With Ellison | None publicly documented |
| Career | Environmental research and project management |
| Employer | Electric Power Research Institute (EPRI) |
| Documented EPRI Role | Project Officer / environmental research work |
| Reported Earlier Role | Business Manager, Environmental Division |
| Second Husband | George Sublett, according to biographical and public-record sources |
| Reported Second Marriage | 1990 |
| Major Interest | Horses and equestrian trails |
| Organization | Co-founder of EnviroHorse |
| 2004 Recognition | Outstanding Horseperson-Citizen of the Year |
| Exact Birth Date | Not reliably established |
| Verified Net Worth | Not publicly available |
| Life in 2026 | Private, with continuing community-service references under her name |
Unlike many articles online, this biography will not invent Adda’s birthday, age or fortune. Strong public documentation exists for parts of her professional life, but several personal details remain private.
Who Is Adda Quinn?
Adda Quinn is an American former environmental research professional who became connected to technology history because she was Larry Ellison’s first wife.
Their marriage came long before Ellison was famous.
Oracle had not yet been founded.
There were no billions.
No giant technology empire.
No private Hawaiian island.
Larry was simply a young programmer living in California and trying to decide where his career would go.
That makes Adda’s place in his story unique.
She knew the person before the legend.
How Did Adda Quinn Meet Larry Ellison?
Biographical accounts of Ellison say Adda and Larry met at an employment agency in Berkeley, California.
The meeting took place around 1967.
Ellison had moved to California after leaving university and was beginning to find work involving computers.
A later biographical timeline also records their meeting at a Berkeley employment agency before their marriage that same year.
Larry Ellison Was Only Starting Out
It is easy to view this period through everything that happened later.
But Adda could not have known that Ellison would eventually become one of the richest technology entrepreneurs in history.
At the time, his future was uncertain.
He moved between programming jobs.
He enjoyed outdoor activities.
He spent money more freely than Adda was comfortable with.
And he reportedly had enormous confidence in his own future even when the money did not yet support that confidence.
Adda Quinn and Larry Ellison Married in 1967
Adda and Larry married in 1967.
The marriage lasted approximately seven years.
Reliable modern biographies of Ellison consistently give their marriage dates as 1967 to 1974.
Their Life Was Far From Billionaire Luxury
Published profiles describe the couple’s early life as modest.
One account says they spent several years in a small apartment before eventually buying a house in Oakland.
A biographical timeline records the couple buying an Oakland home in 1970 while living on comparatively ordinary incomes.
That picture feels almost impossible when compared with Ellison’s later wealth.
But Adda’s marriage belonged to the pre-Oracle world.
Adda and Larry Had Very Different Personalities
One reason their marriage continues to interest readers is how differently the two seemed to approach life.
Accounts based on Ellison’s biography describe Adda as responsible and hardworking.
Larry was more willing to take risks.
That difference could feel exciting at first.
Over time, it became harder to manage.
Adda Wanted More Stability
Later accounts of their marriage say Adda became increasingly concerned about money and Ellison’s uncertain career direction.
Ellison, meanwhile, remained convinced that enormous success was ahead.
That confidence eventually proved correct.
But living with the promise of future success is very different from enjoying success after it arrives.
The marriage ended before his prediction became reality.
Why Did Adda Quinn and Larry Ellison Divorce?
They divorced in 1974.
Several biographical accounts connect the split with differences over money, lifestyle and responsibility. One timeline summarizes the divorce as coming after Adda became frustrated with Ellison’s debts and lack of direction.
It would be too simple, however, to say that one argument ended seven years of marriage.
Relationships usually break down through many small differences.
What is clear is that they wanted different kinds of lives at that point.
Did Adda Quinn and Larry Ellison Have Children?
There is no reliable record of Adda and Larry having children together.
Ellison later became the father of David Ellison and Megan Ellison during his marriage to Barbara Boothe.
Both children eventually became major names in the entertainment industry.
Adda’s seven-year marriage ended years before those children were born.
Adda Quinn’s Life Did Not End With Larry Ellison
This is where her biography becomes much more interesting.
If Adda’s only historical importance were being Ellison’s first wife, her story would stop in 1974.
Instead, she built a serious professional identity.
Her career took her into environmental science and energy research.
Adda Quinn’s Career at EPRI
Adda became associated with the Electric Power Research Institute, commonly known as EPRI.
EPRI conducts research connected with electricity, energy technologies and environmental questions.
Historical technical documents confirm Adda Quinn worked there.
Government Records Confirm Her EPRI Role
A U.S. Environmental Protection Agency remediation case study identifies Adda Quinn as a Project Officer at the Electric Power Research Institute.
The project involved environmental remediation and soil-treatment research.
Another federal technical report again names Adda Quinn as the primary EPRI contact for a contaminated-site research application.
These records are important because they provide direct evidence of her professional life independent of Larry Ellison.
Adda Worked on Environmental Research
EPRI publications also show Adda’s involvement with land and water quality work.
A 1994 EPRI Journal research update credited Ishwar Murarka and Adda Quinn on work involving remediation wastes from manufactured-gas-plant sites.
Another research publication thanked Quinn for her continuing support of environmental forensic work.
Those are not celebrity biographies.
They are technical records.
And they show that Adda’s career had real substance.
Did Adda Quinn Manage a $45 Million Budget?
This claim appears frequently in profiles of Adda.
Her alumni biography says she served as Business Manager for EPRI’s Environmental Division, where she was responsible for a large research organization and a budget of approximately $45 million.
It also describes the division as containing around 45 PhD-level researchers.
Why This Detail Needs Some Caution
Unlike her Project Officer role, which appears directly in government documents, the $45 million figure is mainly preserved through personal and secondary biographical accounts.
That does not mean it is wrong.
But it should be presented as a reported part of her career rather than treated as if it appears in every official EPRI record.
What is beyond dispute is that she held real project and environmental-research responsibilities.
Adda Quinn Worked on Contaminated-Site Problems
Her later project work dealt with practical environmental questions rather than abstract office paperwork.
Technical records place her in research involving contaminated soil, industrial sites and cleanup techniques.
That experience later became useful in a completely different part of her life.
Horses.
Adda Quinn’s Love of Horses
Adda became deeply involved in equestrian life.
She did not simply own a horse and ride occasionally.
Her interest eventually led her into debates over trails, environmental protection and whether horses should continue to have access to certain public lands.
A Trail Dispute Changed Her Direction
In the 1990s, concerns arose around horseback riding and environmental effects on trails in San Mateo County.
A 2004 Almanac profile says Adda became involved in 1996 when there was an effort to restrict horses from trails at Edgewood Park.
Because of her background in soil contamination research, she approached the dispute scientifically.
That is a fascinating connection.
Years of environmental work suddenly became useful in defending equestrian recreation.
Adda Researched Horse Manure
Yes, horse manure became part of her public work.
And Adda treated it seriously.
Questions had been raised about whether horse waste on trails created dangerous environmental or bacterial problems.
Rather than simply arguing from emotion, Adda researched the subject.
The Almanac reported that she concluded the risks being discussed had been overstated and became an advocate for evidence-based decisions about horses on public trails.
Adda Quinn Co-Founded EnviroHorse
Her work eventually helped lead to EnviroHorse.
The group focused on research and information related to horses, trails and environmental management.
A horse-keeping manual also includes a preface from “Adda Quinn of EnviroHorse,” reinforcing her public role in the organization.
This was an unusual second act.
A woman once remembered mainly because of her ex-husband had turned into a community expert discussing science, horses and land management.
Adda Quinn Won a Horseperson Award
In 2004, the San Mateo County Mounted Patrol named Adda its Outstanding Horseperson-Citizen of the Year.
The Almanac described her as only the third woman at that time to receive the honor.
Why Was She Honored?
The award recognized more than riding ability.
She had worked on trail access, environmental research and equestrian advocacy.
People involved with local horse organizations praised her willingness to study technical material, attend meetings and respond to environmental arguments with data rather than anger.
That tells us much more about Adda’s personality than a billionaire-spouse label ever could.
Adda Quinn and George Sublett
After her marriage to Ellison ended, Adda eventually began another long relationship.
Multiple biographical accounts and public-record references connect her with George B. Sublett.
Ancestry’s marriage index identifies an Adda Quinn married to George B. Sublett, while property records also show their names connected together.
When Did They Marry?
Biographical accounts commonly place the marriage in 1990.
George reportedly had two sons from an earlier relationship.
That made Adda part of a blended family.
Adda and George Shared a Love of Horses
Later biographies describe horses and outdoor activities as an important part of their marriage.
The couple reportedly traveled extensively and spent significant time riding.
This appears consistent with Adda’s independently documented equestrian advocacy in the San Mateo County area.
It was a very different life from the Silicon Valley story associated with her first husband.
George Sublett’s Later Health Problems
Some biographical accounts say George suffered a serious horse-related accident around 2000 and experienced major health problems afterward.
He reportedly died in 2010.
Because these details are not documented by the same range of strong sources as Adda’s EPRI work, they should be treated with more caution.
What appears consistent across accounts is that George was an important long-term partner in her later life.
Adda Quinn’s Community Work
Adda’s interests did not stop with environmental and equestrian issues.
Her name also appears in more recent community-service records.
A current Belmont-Redwood Shores Rotary District 5150 page lists Adda Quinn as a co-chair of its International Projects committee.
Another recent nonprofit donor listing includes an Adda Quinn among major supporters of Villages of San Mateo County.
Is This Definitely Larry Ellison’s Former Wife?
The location and long history of community involvement make the connection plausible.
However, those pages do not themselves say “Larry Ellison’s former wife.”
For that reason, it is better to describe these as current public records under Adda Quinn’s name rather than pretend identity verification is absolute.
That is especially important when dealing with private people.
Is Adda Quinn Still Alive in 2026?
There is no credible report reviewed for this article announcing Adda Quinn’s death.
Recent community listings continue to show her name in the Belmont-area nonprofit world.
So the available evidence is consistent with Adda being alive in 2026.
Her exact daily life, however, remains private.
How Old Is Adda Quinn in 2026?
A reliable birth date has not been established in the sources reviewed.
This is where many biography sites make a mistake.
They find another Adda Quinn in genealogy records and attach that person’s birth year to Larry Ellison’s former wife.
For example, historical genealogy databases contain people named Adda Quinn who were born in the nineteenth century.
They are obviously not the same woman.
So an exact age should not be invented.
Where Is Adda Quinn in 2026?
Her longtime public connections have centered on the San Mateo County and Belmont area of California.
Historical reporting identified her as a Belmont resident during her equestrian advocacy work.
Current Rotary and community records also contain an Adda Quinn in that same local area.
Still, publishing a private person’s precise current home address would be unnecessary.
The useful answer is simply that her public record remains connected with Northern California.
What Is Adda Quinn’s Net Worth?
There is no independently verified figure for Adda Quinn’s personal net worth.
This matters because some websites make an easy but misleading assumption:
She married Larry Ellison, so she must be worth millions.
But the marriage ended in 1974.
Oracle had not yet been created.
Ellison’s enormous fortune came later.
Therefore, modern estimates of his wealth tell us almost nothing about Adda’s finances.
Her own net worth should be considered private.
Did Adda Quinn Miss Out on Oracle Billions?
This is an attractive headline, but it oversimplifies history.
Adda and Ellison divorced several years before the software company that became Oracle was founded.
She was not divorcing the billionaire Oracle chairman people know today.
She was separating from a young programmer whose future success was still uncertain.
Looking backward makes everything seem obvious.
Living through it in 1974 would have felt very different.
Why Is Adda Quinn Still Famous?
The biggest reason is Larry Ellison.
His extraordinary rise created interest in every chapter of his life.
Readers want to know who was beside him before Oracle.
That search leads to Adda.
But then something unexpected happens.
The former wife turns out to have an interesting career of her own.
She worked in environmental research.
She became involved in contaminated-site projects.
She applied science to equestrian trail disputes.
She co-founded an environmental horse organization.
And she earned recognition for community advocacy.
That is a far richer story.
Adda Quinn Is More Than Larry Ellison’s First Wife
Being Larry Ellison’s first wife will probably always be the phrase that brings readers to Adda Quinn.
But it should not be the phrase that defines the entire article.
Her marriage ended in 1974.
Her professional and community life continued for decades after that.
Technical government documents record her EPRI work.
Local journalism records her horse advocacy.
Community organizations record her continued involvement.
Those sources reveal a person who built an identity well beyond one early marriage.
Final Thoughts
Adda Quinn experienced Larry Ellison before almost anyone knew his name.
They met when he was a young programmer and married in 1967.
For seven years, they shared a life that looked nothing like the enormous wealth Ellison would later accumulate.
Their marriage ended in 1974.
And Adda moved forward.
Her work at the Electric Power Research Institute became the strongest documented chapter of her independent career. Federal and EPRI materials identify her in environmental project work involving contaminated sites, soil treatment and land-and-water research.
Then horses became another major chapter.
Using the same research mindset, Adda entered debates over equestrian trail access and environmental concerns. In 2004, that work earned her the San Mateo County Mounted Patrol’s Outstanding Horseperson-Citizen of the Year honor.
She later shared a long partnership with George Sublett and remained closely associated with Northern California community life.
In 2026, many details about Adda remain private.
Her exact age is not reliably public.
Her finances are unknown.
Her everyday routine is not documented in celebrity magazines.
And that seems appropriate.
Her most interesting story is not how close she once came to future billions.
It is how much of a life she built after walking away from them.
Frequently Asked Questions About Adda Quinn
Who is Adda Quinn?
Adda Quinn is best known as Larry Ellison’s first wife. She later developed an independent career involving environmental research at the Electric Power Research Institute and equestrian advocacy.
When did Adda Quinn marry Larry Ellison?
Adda and Larry Ellison married in 1967.
When did Adda Quinn and Larry Ellison divorce?
They divorced in 1974, after approximately seven years of marriage.
Did Adda Quinn and Larry Ellison have children?
No children from their marriage are publicly documented.
How did Adda Quinn meet Larry Ellison?
Published biographical accounts say they met at an employment agency in Berkeley, California, before marrying in 1967.
Was Larry Ellison already rich when he married Adda?
No. Their marriage took place years before Oracle was founded and before Ellison became wealthy.
What did Adda Quinn do for a living?
She worked at the Electric Power Research Institute. Federal environmental documents specifically identify her as an EPRI Project Officer.
Did Adda Quinn work in environmental science?
Yes. Her documented project work included environmental remediation, contaminated soils and land-and-water issues.
Did Adda Quinn manage a $45 million budget?
An alumni biography reports that while working as Business Manager of EPRI’s Environmental Division, she managed a roughly $45 million budget associated with a large research team. This figure is less directly documented than her confirmed Project Officer role.
Who was Adda Quinn’s second husband?
Biographical and public-record sources identify George Sublett as her later husband.
Was Adda Quinn involved with horses?
Yes. She became a prominent local equestrian advocate and co-founded EnviroHorse.
What award did Adda Quinn receive?
In 2004, she received the San Mateo County Mounted Patrol’s Outstanding Horseperson-Citizen of the Year award.
Is Adda Quinn still alive in 2026?
No reliable death report has been found, while recent community records continue to list someone named Adda Quinn in the Belmont-area nonprofit and Rotary community.
How old is Adda Quinn?
Her exact birth date and age are not reliably established in authoritative public sources.
What is Adda Quinn’s net worth?
There is no verified public figure for her personal net worth.
Are the Adda Quinn images above real?
Yes. The first two photographs are web photographs identified as Adda Quinn rather than AI-generated lookalikes. The third is a real official photograph of Larry Ellison used as a related image.
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