In 2008, identical twins Charlie and Max Carver landed their breakout roles on Desperate Housewives and became familiar faces on television. Their older half-brother took the opposite path: investment management, regulatory paperwork, and a deliberate distance from fame. His name is Bayard Martinsen. Two careers, one family name — and almost no public trace of the man in the middle. Because he never courts publicity, much of what the internet says about him is guesswork. This article presents confirmed information clearly and avoids including unverified details.
Bayard Martinsen: Quick Facts
Bayard Cutler Martinsen is described as an American investment professional and the paternal half-brother of actors Charlie Carver and Max Carver. However, details about his birth date, birthplace, career, and private life should be included only when supported by reliable sources.
That silence has consequences. Search his name and you’ll find dozens of biography sites, each more confident than the last, filling the gaps with invented net-worth figures and exaggerated business claims. The facts below come from better sources: regulatory filings, university records, state registrations, and an official memorial — documents any reader can check independently.
A Family Split Between Two Households
Bayard’s parents, Dr. Robert Lawrence Martinsen and Phoebe Cutler married in May 1977, and Bayard was born in 1978.
The marriage ended in divorce during the 1980s. Source
His mother became a noted landscape architect and author; her book The Public Landscape of the New Deal (Yale University Press, 1985) is still cited as a pioneering study of New Deal landscapes. Source His father remarried Anne Carver, a philanthropist and community activist, and their identical twin sons were born in San Francisco in 1988 — Charlie on July 31, Max seven minutes later on August 1. In 1992, the twins’ mother and her husband Denis Sutra moved them to Calistoga, in Napa Valley. Source
Bayard, roughly a decade older, grew up in a different household. The brothers share a father, not a childhood — and that detail explains a lot about what followed. One branch of the family went toward Hollywood; the other went toward finance.
His Father: A Serious Scholar
Robert Martinsen was a physician turned medical historian who taught at Harvard Medical School and Tulane University and directed the Office of NIH History from 2007 to his 2012 retirement. He wrote two significant books: The Brain Takes Shape: An Early History (Oxford University Press, 2004), a scholarly history of early brain science, and A Life Worth Living: A Doctor’s Reflections on Illness in a High-Tech Era (2008), written for patients facing hard medical decisions. Source
He died in September 2013 at 66. An official NIH memorial named his three surviving sons: Bayard, Charles, and Robert — the youngest known as Max. Source That memorial remains the clearest public confirmation of the family connection the internet keeps re-discovering.
The Famous Half-Brothers
Charlie and Max Carver’s careers moved fast after they entered the television industry. Charlie played Porter Scavo on Desperate Housewives from 2008 to 2012, bringing him wider recognition. Later, the twins appeared together in MTV’s Teen Wolf, portraying the werewolf brothers Ethan and Aiden. Charlie also appeared in HBO’s The Leftovers and other television productions. Meanwhile, Max took on roles in Teen Wolf, The Leftovers, and The Batman. Both brothers also appeared in The Boys in the Band, performing on Broadway and in the 2020 film adaptation.
Desperate Housewives from 2008 to 2012; the twins then starred together on MTV’s Teen Wolf as the alpha-werewolf Steiner brothers, Ethan and Aiden.
Charlie played Porter Scavo on Desperate Housewives from 2008 to 2012. During this period, he gained wider recognition for his television work. Later, he continued building his acting career through other television series and film projects.
Later, the twins appeared together in MTV’s Teen Wolf, portraying the werewolf brothers Ethan and Aiden. Charlie also joined the first season of HBO’s The Leftovers as Scott Frost and went on to appear in other television productions, including American Horror Story.
The Leftovers as Scott Frost and later appeared in Retched and American Horror Story: NYCS Max, meanwhile, appeared in roughly 20 episodes of Teen Wolf, played Adam Frost on The Leftovers, and joined the cast of The Batman. Source The pair also shared the screen in The Boys in the Band, on Broadway and in the 2020 film.
While the twins were learning scripts, Bayard was learning markets. Same father, two completely different answers to the question of what to do with a public name.
Building a Career in Finance
Bayard’s clearest academic trace is a UCSB giving record listing “Bayard Martinsen ’01,” which supports a Class of 2001 graduation. An economics degree is widely reported, though that record doesn’t confirm the major. Source
His career reportedly began at Outrider Management, a hedge fund focused on value investing, followed by Dalton Investments, a global asset-management firm. Source
The most clearly documented part of his career is his association with Cactus Investment Management LLC in San Francisco.
He joined around 2012, and a January 2016 Form ADV — the disclosure document investment advisers file with regulators — identified Bayard Cutler Martinsen as managing director, managing member, and control person, with ownership in the highest disclosed category: 75 percent or more. He signed the filing himself. Source In plain terms: this wasn’t a job title on a magazine profile; it was a signed regulatory document making him the firm’s controlling owner.
New York Department of State records also link his name to Pollyanna LLC, formed March 7, 2019, though its activities are thinly documented. Source
Quick Facts
| Detail | What Records Show |
| Full name | Bayard Cutler Martinsen |
| Born | 1978, San Francisco, California |
| Parents | Robert Lawrence Martinsen; Phoebe Cutler |
| Education | UCSB Class of 2001 (major unconfirmed) |
| Documented role | Managing director/member, 75%+ owner, Cactus Investment Management (2016 filing) |
| Linked company | Pollyanna LLC, New York, March 7, 2019 |
| Half-brothers | Charlie and Max Carver, twin actors (born 1988) |
What’s Documented — and What Isn’t
| Claim | Status |
| Leadership and 75%+ ownership of Cactus Investment Management | Documented (2016 Form ADV) |
| Name linked to Pollyanna LLC | Documented (NY state records) |
| UCSB Class of 2001 | Documented (university giving record) |
| Economics degree | Widely reported, unconfirmed |
| Roles at Outrider Management and Dalton Investments | Reported by multiple outlets, no primary record cited |
| Any specific net worth | Speculation |
What About His Net Worth?
Nobody outside his finances knows. Figures on biography sites aren’t backed by audited disclosures or any statement from him — and assets under management at a firm he ran would count client money, not personal wealth. Every dollar figure attached to his name is speculation. Source
FAQs
He is the paternal half-brother of Charlie and Max Carver, as they share the same father but have different mothers.
The 2013 NIH memorial lists all three as Dr. Martinsen’s sons. Source
What does he do for a living? Investment management. Filings document his leadership and majority ownership at Cactus Investment Management; New York records also link him to Pollyanna LLC. Source
Where did he study? UC Santa Barbara, with a giving record supporting the Class of 2001. The commonly reported economics major isn’t confirmed by that record. Source
Is Bayard Martinsen his real name? Yes. His full legal name, Bayard Cutler Martinsen, appears in the January 2016 Form ADV, which he signed himself. Source
How old is he? Born in 1978, he is in his late forties; his exact birth date isn’t publicly documented. Sources
Final Thoughts
Bayard Martinsen is interesting precisely because he resisted a fame that was one family connection away. Records confirm a real career in investment management — a hedge fund path, a controlling ownership stake, a company on file in New York — and a famous family he never traded on. Everything else, from net-worth guesses to exaggerated business claims, says more about how the internet treats private people than about the man himself. Sometimes the most honest biography is the one that says exactly where the record ends. Visit Tomoson for more details.