Principal / Operator / Builder

Patient capital,
operated & earned.

Dennis A. Close is the operating principal of Dice Holdings — a private platform spanning real assets, regulated digital markets, and hardened compute infrastructure. $2B+ in aggregated liquidity under management in 2025; $500M+ in lifetime real-asset transaction value. Thirty years of building, scaling, and exiting under institutional scrutiny.

Based Jupiter, Florida

Platform Dice Holdings LLC

Style Family office · Long-hold

Portrait of Dennis A. Close — D.A. CLOSE2026

01 Mandate

Built, scaled, exited — under institutional scrutiny.

One operator. One book. Concentrated positions across three verticals — with third-party institutional validation: a strategic fintech exit and eight marinas designed, built, and delivered — in whole or in part — several subsequently acquired by institutional owners including Blackstone (Safe Harbor) and IGY. No fund cycle. No syndicate. Decisions made with the calendar of a generation.

$2B+Private capital managed

$150MStrategic exit

$500M+Total maritime transactions

8Marinas designed & built

30yrCareer in operations

02Verticals

Two live mandates. One exit. One discipline.

Vertical / 01

IRONCLAD

Hardened AI infrastructure

Hardened, relocatable, single-tenant compute modules — owned and operated for enterprise AI, defense, and sovereign programs.

View platform → Vertical / 02

Marinas & Yachts

8 marinas developed · 3 acquired by Blackstone & IGY

Sovereign-grade marina, refit, and waterfront development, alongside a career in yacht manufacturing and brokerage.

View portfolio → Vertical / 03

Platform & Capital Markets

Liquidity One AG · Strategic exit

SEC/FINRA-registered ATS for tokenization, real-time settlement, and collateral optimization. Acquired by DeRisked Digital / Bosonic.

03 Background

From the control room to the cap table.

Dennis began his career underway. Eight strategic deterrent patrols aboard SSBN submarines — USS Maryland, USS Kentucky, USS West Virginia — in the U.S. Navy's submarine fleet. Former Top Secret / SCI clearance and Intelligence Custodian.

That standard — zero-fail execution, complete checklists, quiet watches — carried directly into operating private capital. The marinas, the platform, the validator network: all built to the same tolerances.

Full background →

04 Direct line

Inquiries from operators, owners of waterfront assets, and aligned long-hold capital.

Open contact →

Patient capital, operated & earned.