Frank DiMartini

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 “Caution” (2.5 / 10)

• Multiple documented disclosures — a pending seven-figure investor-fraud suit, a resignation tied to misrepresentation allegations, an open FINRA inquiry, and an outstanding tax lien — are, together, a meaningful caution signal for anyone weighing an investment relationship.
• Because the investment allegations are unproven, we do not rate this “Avoid” or state that any wrongdoing occurred. The score reflects unresolved risk, not established guilt.
• The rating will rise if the matters are dismissed or resolved in his favor, and fall 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. 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 is someone to approach with real caution and verify thoroughly — while remembering the investment allegations are unproven and denied.

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