Type: fund
Notes: Citadel's 13F filer (FL). Latest 13F-HR 2026-08-14 (Q2 2026), amended 13F-HR/A 2026-09-02. Citadel AUM ~ $67B as of Jan 2026 (after distributing $5B of 2025 profits).

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Citadel Advisors II LLCfund · CIK 0001576996

Type: fund
Notes: Affiliated Citadel adviser entity (IL) listed on EDGAR; 13F-HR filing history not individually confirmed.

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Griffin Catalystfamily office

Type: family office
Notes: Philanthropic/civic platform launched fall 2023 to direct Griffin's charitable giving (not an investment office).

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Private deals

Griffin and Goldman Properties bought the 545Wyn office building in Miami's Wynwood district (~298,000 sq ft office)…Jan 2026

In full: Griffin and Goldman Properties bought the 545Wyn office building in Miami's Wynwood district (~298,000 sq ft office) from Sterling Bay for ~$180M; later landed ~$118M financing (Mar 2026).
Date: 2026-01

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Citadel committed ~$4.5B as 60% partner with Vornado (lead) to redevelop 350 Park Avenue, Manhattan, into a ~1,414-ft…Aug 2026

In full: Citadel committed ~$4.5B as 60% partner with Vornado (lead) to redevelop 350 Park Avenue, Manhattan, into a ~1,414-ft Foster + Partners supertall; Citadel to anchor ~1M sq ft; demolition underway July 2026; ~$3.3B construction loan reported near as of Aug 2026.
Date: 2026-08

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City of Miami approved land sale giving Griffin ownership of an entire Brickell block for the planned Citadel HQ (per…Jul 2026

In full: City of Miami approved land sale giving Griffin ownership of an entire Brickell block for the planned Citadel HQ (per Forbes headline).
Date: 2026-07-23

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Agreed to sell a Palm Beach property to TZ Capital for ~$81M.Nov 2025

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Real estate

Upper East Side (co-op), Manhattan, NYDuplex co-op apartment (bought from… · $45M · Feb 2025

Type: Duplex co-op apartment (bought from Julia Koch)
Price: 45000000
Date: 2025-02

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Upper East Side (co-op), Manhattan, NYAdjoining ~7,500 sq ft duplex co-op… · $38M · Apr 2026

Type: Adjoining ~7,500 sq ft duplex co-op, off-market all-cash
Price: 38000000
Date: 2026-04

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Wynwood, Miami, FLOffice building (545Wyn), with Goldman… · $180M · Jan 2026

Type: Office building (545Wyn), with Goldman Properties
Price: 180000000
Date: 2026-01
Via: Joint venture with Goldman Properties

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Brickell, Miami, FL2.5-acre bayfront development site for… · $363M · 2022

Type: 2.5-acre bayfront development site for planned Citadel/Citadel Securities HQ (54-story, ~1.7M sq ft office tower, ~$2.5B project)
Price: 363000000
Date: 2022

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Coconut Grove, Miami, FL~4-acre waterfront estate (former… · $106.9M · Sep 2022

Type: ~4-acre waterfront estate (former Adrienne Arsht estate); Miami-Dade single-family record
Price: 106875000
Date: 2022-09

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Midtown/Central Park South, Manhattan, NYFour unfinished floors in condo tower… · $238M · Jan 2019

Type: Four unfinished floors in condo tower (then U.S. residential record) (as of 2019)
Price: 238000000
Date: 2019-01

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Palm Beach, FLOceanfront property/site; agreed sale… · $81M · Nov 2025

Type: Oceanfront property/site; agreed sale to TZ Capital
Price: 81000000
Date: 2025-11 (sale)

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Chicago, IL (Park Tower, Magnificent Mile)Last Chicago condo (penthouse) under… · $12.5M · Dec 2025

Type: Last Chicago condo (penthouse) under contract after cut to $12.5M list
Price: 12500000
Date: 2025-12 (sale pending)

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Chicago, ILTwo condos sold to Gov. J.B. Pritzker… · $19M · 2024 (sale)

Type: Two condos sold to Gov. J.B. Pritzker (combined)
Price: 19000000
Date: 2024 (sale)

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Trophies

Willem de Kooning 'Interchange' (reported ~$300M) and Jackson Pollock 'Number 17A' (~$200M)

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Jean-Michel Basquiat 'Boy and Dog in a Johnnypump' (>$100M)

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First-edition printing of the U.S. Constitution bought for $43.2M at Sotheby's (Nov 2021)

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Stegosaurus skeleton 'Apex' bought for $44.6M (2024), record auction price for a fossil

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Funded U.S. Men's National Team hiring of coach Mauricio Pochettino; talks to buy Miami Dolphins/F1 Miami GP stakes…

In full: Funded U.S. Men's National Team hiring of coach Mauricio Pochettino; talks to buy Miami Dolphins/F1 Miami GP stakes fell apart (2023) - no team ownership

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Legal & regulatory

Griffin sued IRS/Treasury (Dec 2023) over contractor Charles Littlejohn's leak of his tax data to ProPublica; dropped…

In full: Griffin sued IRS/Treasury (Dec 2023) over contractor Charles Littlejohn's leak of his tax data to ProPublica; dropped suit June 24, 2024 after IRS public apology; no damages sought.

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Citadel Securities lost 11th Circuit challenge to SEC approval of IEX's speed-bump options exchange (May 29, 2026).

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Citadel Securities sued Consolidated Audit Trail LLC in D.C. federal court (Jan 16, 2026) seeking to freeze ~$119M in…

In full: Citadel Securities sued Consolidated Audit Trail LLC in D.C. federal court (Jan 16, 2026) seeking to freeze ~$119M in disputed CAT fees.

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Class action filed June 29, 2026 by Grant & Eisenhofer alleging spoofing by Citadel Securities and Virtu Americas.

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Citadel Securities dropped U.S. trade-secrets suit vs Portofino Technologies after winning ~GBP 6M UK judgment against…

In full: Citadel Securities dropped U.S. trade-secrets suit vs Portofino Technologies after winning ~GBP 6M UK judgment against its founders (July 2026).

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SEC charged Citadel Securities with Reg SHO order-marking violations; $7M penalty (Sept 2023).

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FINRA fined Citadel Securities $1M over CAT reporting failures (2024).

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Public dispute with NYC Mayor Mamdani over pied-a-terre tax (Apr-May 2026); Griffin threatened relocation of NYC…

In full: Public dispute with NYC Mayor Mamdani over pied-a-terre tax (Apr-May 2026); Griffin threatened relocation of NYC project before proceeding.

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Giving

Griffin Catalyst (philanthropy platform; >$2B cumulative giving)

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Kenneth C Griffin Museum of Science and Industry, Chicago (renamed after Griffin gift)

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$15M gift to National Constitution Center (May 2025)

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$5.5M gift to University of Florida Hamilton School (Nov 2025)

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Florida gifts incl. $50M to Success Academy Florida expansion, $15M Mount Sinai Miami

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Research gaps: Exact current ownership % of Citadel Securities after 2022 Sequoia/Paradigm investment not in primary source; Griffin Catalyst legal entity/EIN not verified; London and Southampton homes not re-verified with fetched primary press (omitted); Forbes, Robb Report and TheRealDeal pages partly blocked, some entries rely on search-result snippets; Citadel Advisors II 13F status not individually confirmed; no personal stakes outside Citadel entities verified.

What to watch

Closing of ~$3.3B construction loan for 350 Park Avenue (Vornado/Citadel) and steel procurementH2 2026

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Construction start of Citadel's Brickell HQ tower, expected mid-to-late 2026late 2026

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Citadel Advisors Q3 2026 13F-HR (due 45 days after quarter end, ~mid-Nov 2026)Nov 2026

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Citadel Securities v. CAT LLC fee litigation in D.C. federal court

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Spoofing class action vs Citadel Securities and Virtu (motions stage)

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Citadel Securities expansion into equity block trading

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