Bayard Martensen is an American finance professional whose name is often associated with actors Charlie and Max Carver. The most substantial public documentation about him comes from a regulatory filing for Cactus Investment Management LLC, where he was identified as Bayard Cutler Martensen and held senior management, ownership, and control roles. That filing provides a reliable snapshot of his investment-management work in 2016, but it is not a complete personal biography. A careful review separates those documented career details from personal claims that are frequently repeated without strong sourcing.
| Category | Documented detail |
|---|---|
| Full name | Bayard Cutler Martensen |
| Professional field | Investment management |
| Documented company | Cactus Investment Management LLC |
| Documented titles | Managing director and managing member |
| Ownership status in filing | 75% or more |
| Control-person status | Yes |
| Individual CRD number | 4909867 |
| Family connection | Paternal half-brother of actors Charlie and Max Carver, based on published parentage records |
The professional details above appear in Cactus Investment Management’s Form ADV, a regulatory document used by investment advisers. The family relationship is supported by separate biographical records identifying Robert L. Martensen as the father of Bayard, Charlie, and Max.
Who Is Bayard Martensen?
Bayard Martensen is best described as an investment-management professional. In a January 2016 Form ADV filing, his full legal name appeared as Bayard Cutler Martensen. The document identified him as a managing director of Cactus Investment Management LLC and listed February 2012 as the date on which he acquired that status.
The same filing classified Martensen as an owner of 75% or more of the firm and marked him as a control person. He also signed the filing as the company’s managing member. These designations suggest that he was not merely an employee or outside adviser. At the time covered by the filing, he occupied a central leadership position and held substantial ownership authority.
His individual Central Registration Depository number was listed as 4909867. CRD numbers are identifiers used within the securities industry’s registration and regulatory systems. The inclusion of this number helps distinguish him from other people with similar names.
Bayard Martensen’s Role at Cactus Investment Management
Leadership and ownership
Cactus Investment Management LLC reported that it was formed on February 3, 2012. Martensen’s status as managing director was recorded as beginning in the same month, indicating that he was involved from the firm’s earliest documented stage.
The filing’s ownership code “E” meant that Martensen held 75% or more of the company. He was also identified as a control person, a regulatory term generally used for someone with the power to direct a firm’s management or policies.
His signature as managing member adds another layer to the record. A managing member of a limited liability company commonly combines executive responsibility with ownership authority. In practical terms, the filing places Martensen among the firm’s principal decision-makers rather than in a narrowly defined investment or administrative position.
What the company reported
The 2016 filing described Cactus Investment Management as an adviser providing portfolio-management services to pooled investment vehicles. It reported approximately $4.4 million in regulatory assets under management, all held in one discretionary account.
The firm also stated that its compensation included:
- A percentage of assets under management
- Performance-based fees
A discretionary account allows the investment adviser to make portfolio decisions for the account within the authority granted by the client or fund. Performance-based compensation generally links part of the adviser’s fee to investment results, subject to applicable rules and contractual terms.
The $4.4 million figure belonged to the advisory firm’s regulatory disclosure. It should not be treated as Martensen’s personal wealth, annual income, or ownership payout.
A Timeline of the Documented Record
| Date | Event |
| February 3, 2012 | Cactus Investment Management LLC was formed |
| February 2012 | Bayard Martensen acquired his recorded status as managing director |
| January 4, 2016 | Martensen signed the Form ADV as managing member |
| January 6, 2016 | The filing was submitted under Cactus Investment Management’s CRD number 162213 |
The timeline comes directly from the firm’s regulatory filing and should be read as a historical snapshot of the business at that time.
What the Regulatory Filing Can—and Cannot—Establish
Form ADV is designed to disclose information about an investment adviser, including its ownership, services, assets, compensation methods, disciplinary history, and business structure. It is not intended to document an owner’s childhood, education, family life, or complete employment history.
The filing reviewed for this article did not include criminal, regulatory-action, or civil judicial-action disclosure pages for Martensen or the firm. That statement applies only to the filing submitted in 2016 and should not be interpreted as a present-day background check.
The document is also historical rather than proof of Martensen’s current position. This search did not uncover authoritative primary records confirming an exact birth date, university degree, early employers, marital status, personal fortune, or later business ventures. Those details are therefore omitted rather than drawn from copied biography pages.
Is Bayard Martensen Related to Charlie and Max Carver?
Published biographical records support the conclusion that Bayard Martensen is the paternal half-brother of twin actors Charlie and Max Carver.
A biographical entry for physician and historian Robert L. Martensen lists Bayard as his son. Separate biographies of Charlie and Max identify Robert Martensen as their father. When those parentage records are considered together, they establish the paternal connection among the three men. This relationship is assembled from separate published entries rather than from one official family record.
Charlie Carver was born Charles Carver Martensen, while Max Carver was born Robert Maxwell Martensen Jr. Both became actors and appeared in television productions including Desperate Housewives, Teen Wolf, and The Leftovers. Bayard, by contrast, is documented through financial-regulatory records rather than entertainment credits.
The Martensen Family’s Medical and Academic Background
Bayard’s father, Robert L. Martensen, had a distinguished career in medicine, medical history, and bioethics. The National Institutes of Health states that he worked as an emergency-room and intensive-care physician and later held academic positions at Harvard Medical School and Tulane University.
Robert Martensen directed the Office of NIH History from 2007 to 2012. His work brought together clinical medicine, ethics, and the history of health care. He died on September 26, 2013, at the age of 66.
This background helps explain why the Martensen name appears in several different professional settings. Robert was associated with medicine and scholarship, Charlie and Max pursued acting, and Bayard’s documented career was in investment management.
Common Errors in Articles About Bayard Martensen
The largest factual mistake is treating a company’s assets under management as an individual’s net worth. Cactus Investment Management’s reported $4.4 million represented assets managed by the advisory business. It was not a declaration of Martensen’s personal assets.
Another error is converting an old regulatory filing into a claim about his present employment. The Form ADV confirms what Martensen’s position was when the document was filed in January 2016. It does not, on its own, establish where he works today.
Some profiles also present precise personal details without linking them to government filings, institutional biographies, interviews, company announcements, or other dependable records. A responsible biography should distinguish between a name repeated across websites and a fact documented by a traceable source.
Frequently Asked Questions
Who is Bayard Martensen?
Bayard Martensen is a finance professional identified in a 2016 regulatory filing as the managing director, managing member, principal owner, and control person of Cactus Investment Management LLC. His full legal name in the filing is Bayard Cutler Martensen.
What did Bayard Martensen do at Cactus Investment Management?
He held senior leadership and ownership responsibilities. The firm provided portfolio-management services to pooled investment vehicles and reported one discretionary account containing approximately $4.4 million in regulatory assets under management.
Is Bayard Martensen related to Charlie and Max Carver?
Yes. Published parentage records identify Robert L. Martensen as the father of Bayard, Charlie, and Max, making Bayard the actors’ paternal half-brother.
Is Bayard Martensen an actor?
The records reviewed for this article identify him with investment management, not acting. Charlie and Max Carver are the family members known for professional acting careers.
Was the firm’s $4.4 million Martensen’s personal net worth?
No. The figure was Cactus Investment Management’s regulatory assets under management. Assets under management belong to managed accounts or investment vehicles and are not the same as an adviser’s personal fortune.
What is Bayard Martensen’s CRD number?
The 2016 filing lists his individual CRD number as 4909867. The number functions as an industry identifier within securities-registration records.
Conclusion
Bayard Martensen’s clearest documented professional record comes from Cactus Investment Management’s 2016 regulatory filing. It identifies him as Bayard Cutler Martensen and records substantial ownership, management, and control responsibilities at the investment-advisory firm. Published parentage records also connect him to actors Charlie and Max Carver. Beyond those points, a dependable profile should avoid turning unsupported personal claims or company assets into biographical facts.
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