Frank DiMartini
Former securities broker (CRD# 4512897) — not currently registered
What the public record shows
Everything below comes from FINRA BrokerCheck, the securities industry’s public disclosure database, for Frank Jeffrey DiMartini, CRD# 4512897. Frank DiMartini was a registered securities broker from 2002 to 2025 and is not currently registered.
A pending lawsuit alleging investment misrepresentation
BrokerCheck reports a pending civil action filed September 22, 2025 in the Supreme Court of the State of New York, New York County. According to the disclosure, the plaintiffs allege that “the respondents misrepresented various investment opportunities,” involving Reg D private placements, private-placement deals, and a loan transaction. The related customer-dispute disclosure lists alleged damages of $1,500,000. The matter is marked Pending — meaning the allegations have not been proven or adjudicated.
A resignation after allegations
BrokerCheck records that DiMartini voluntarily resigned from Altitude Capital Group LLC on November 18, 2025. The firm reported the reason as allegations that “Mr. DiMartini made material misrepresentations regarding various investment transactions.” A resignation-after-allegations is a documented fact; the underlying allegations themselves remain unproven.
An open FINRA inquiry
FINRA opened an information request on November 13, 2025 seeking details of the civil lawsuit. An inquiry is not a finding or a charge of wrongdoing.
An outstanding IRS tax lien
BrokerCheck lists an unsatisfied federal tax lien of $94,009.36 held by the IRS, filed October 16, 2024, reported as still outstanding. A tax lien is a documented financial fact, separate from the investment allegations.
Registration history
DiMartini was registered across eight firms over his career, including National Securities, GunnAllen Financial, Alexander Capital, and most recently Altitude Capital Group. He is not currently registered to sell securities.
His response
DiMartini denies the allegations. His statement on the BrokerCheck record reads:
“I categorically deny all allegations made in the referenced lawsuit and intend to vigorously defend myself against these claims. I am confident that the facts will demonstrate that the allegations are without merit.”
Why we rate this “Avoid” (2.5 / 10)
- Four separate, documented disclosures — a pending seven-figure investor-fraud suit, a resignation tied to misrepresentation allegations, an open FINRA inquiry, and an outstanding federal tax lien — have stacked up on one broker’s record in the space of about a year. That concentration of red flags is why we recommend avoiding a new investment relationship until these matters resolve, even though no single disclosure has been proven.
- This is a risk-based recommendation, not a finding of guilt. The investment allegations remain unproven and DiMartini denies them; “Avoid” reflects the weight of unresolved, documented risk factors, not an assertion that any wrongdoing occurred.
- The verdict will improve if the matters are dismissed or resolved in his favor, and would harden further if a court or regulator makes findings against him.
What we are not saying
We are not stating that Frank DiMartini committed a crime, was convicted of anything, or has been sanctioned by a regulator. As of this review, the securities- related allegations are pending and unproven, and he denies them. Our “Avoid” verdict is our editorial judgment about the concentration of documented risk factors — not a statement that the underlying allegations are true. This review reports only what appears in the public FINRA record.
Verify it yourself
- FINRA BrokerCheck (brokercheck.finra.org, CRD# 4512897) — read every disclosure and his full statement directly.
- New York State court records (NYSCEF) — look up the pending civil case.
- SEC EDGAR / IAPD — check for any securities filings or adviser registration.
Bottom line
An unregistered broker with a pending seven-figure misrepresentation suit, a resignation tied to similar allegations, and an outstanding tax lien has accumulated enough documented red flags that we recommend avoiding a new investment relationship until these matters are resolved — while remembering the investment allegations themselves are unproven and denied.
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