Acasta Partners UK LLP — 13F Holdings & Portfolio
CIK 2090007 · latest 13F-HR filed 2026-10-05
Acasta Partners UK LLP manages $223.2M in 13F-reported U.S. long-equity assets across 19 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are BABAF (37.88%), LAR (13.94%), JAZZ (12.72%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 5 new positions and exited 2; 1 existing position rose in reported value and 9 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-10-05
vs 2026-06-30
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q3 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q2 26 → Q3 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 95.8%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Jun 29, 2026.
LONDON SW1X 9DQ
United Kingdom
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| ACASTA PARTNERS HOLDINGS LIMITED Control | CORPORATE MEMBER since Jun 2025 | 75% or more | Foreign Entity |
| Clarke, Joseph, Nelson Control | CHIEF OPERATING OFFICER since Feb 2025 | Less than 5% | Individual |
| HUMPHRIES, MICHAEL, JAMES Control | LIMITED PARTNER/MEMBER OF MANAGEMENT COMMITTEE since Mar 2020 | 75% or more | Individual |
| KEANE, DERMOT, ANDREW Control | MANAGEMENT COMMITTEE MEMBER since Jan 2026 | Less than 5% | Individual |
| Pearce, Liam, Christopher Control | CHIEF FINANCIAL OFFICER since Feb 2025 | Less than 5% | Individual |
| ACASTA PARTNERS GP LLC Control Indirect owner via ACASTA PARTNERS L.P. | GENERAL PARTNER since Jun 2020 | General partner, trustee or manager | Foreign Entity |
| ACASTA PARTNERS L.P. Control Indirect owner via ACASTA PARTNERS HOLDINGS LIMITED | SHAREHOLDER since Dec 2024 | 75% or more | Foreign Entity |
| HUMPHRIES, MICHAEL, JAMES Control Indirect owner via ACASTA PARTNERS L.P. | LIMITED PARTNER since Jun 2020 | 50–75% | Individual |
| HUMPHRIES, MICHAEL, JAMES Control Indirect owner via ACASTA PARTNERS GP LLC | FOUNDING MEMBER since May 2019 | 50–75% | Individual |
| TETRAGON FINANCIAL GROUP LIMITED Control Indirect owner via TETRAGON PARTNERS GP LTD. | SHAREHOLDER since Oct 2012 | 75% or more | Foreign Entity |
| TETRAGON FINANCIAL GROUP LIMITED Control Indirect owner via TETRAGON PARTNERS TOPCO LTD. | SHAREHOLDER since Oct 2012 | 75% or more | Foreign Entity |
| TETRAGON PARTNERS GP LTD. Control Indirect owner via TETRAGON PARTNERS L.P. | GENERAL PARTNER since Jun 2009 | General partner, trustee or manager | Foreign Entity |
| TETRAGON PARTNERS L.P. Control Indirect owner via ACASTA PARTNERS L.P. | LIMITED PARTNER since Aug 2009 | 25–50% | Foreign Entity |
| TETRAGON PARTNERS L.P. Control Indirect owner via ACASTA PARTNERS GP LLC | TFG ASSET MANAGEMENT MEMBER since May 2019 | 25–50% | Foreign Entity |
| TETRAGON PARTNERS TOPCO LTD. Control Indirect owner via TETRAGON PARTNERS L.P. | LIMITED PARTNER since Oct 2012 | 75% or more | Foreign Entity |
Ownership & leadership changes · 4 filings with changes since Jul 7, 2025
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- ChangedACASTA PARTNERS HOLDINGS LIMITED · ownership Less than 5% → 75% or more
- No longer listedCOTE, SEAN, ANDREW · MEMBER OF MANAGEMENT COMMITTEE · Less than 5% · control person · listed since Jun 2025
- No longer listedSCHEEHLE, STACY, FELICE · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Mar 2021
- No longer listedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TFG ASSET MANAGEMENT GP LTD. · control person · listed since Oct 2012
- No longer listedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TFG ASSET MANAGEMENT TOPCO LTD. · control person · listed since Oct 2012
- No longer listedTFG ASSET MANAGEMENT GP LTD. · GENERAL PARTNER · General partner, trustee or manager · indirect via TFG ASSET MANAGEMENT L.P. · control person · listed since Jun 2009
- No longer listedTFG ASSET MANAGEMENT TOPCO LTD. · LIMITED PARTNER · 75% or more · indirect via TFG ASSET MANAGEMENT L.P. · control person · listed since Oct 2012
- No longer listedTFG ASSET MANAGEMENT UK LIMITED · LIMITED PARTNER · 25–50% · control person · listed since Jun 2025
- AddedKEANE, DERMOT, ANDREW · MANAGEMENT COMMITTEE MEMBER · Less than 5% · control person
- AddedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TETRAGON PARTNERS GP LTD. · control person
- AddedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TETRAGON PARTNERS TOPCO LTD. · control person
- AddedTETRAGON PARTNERS GP LTD. · GENERAL PARTNER · General partner, trustee or manager · indirect via TETRAGON PARTNERS L.P. · control person
- AddedTETRAGON PARTNERS TOPCO LTD. · LIMITED PARTNER · 75% or more · indirect via TETRAGON PARTNERS L.P. · control person
- ChangedClarke, Joseph, Nelson · title CHIEF OPERATING OFFICER, CO-HEAD → CHIEF OPERATING OFFICER
- ChangedSCHEEHLE, STACY, FELICE · no longer a control person
- AddedTFG ASSET MANAGEMENT UK LIMITED · LIMITED PARTNER · 25–50% · control person
- ListedACASTA PARTNERS GP LLC · GENERAL PARTNER · General partner, trustee or manager · indirect via ACASTA PARTNERS L.P. · control person
- ListedACASTA PARTNERS HOLDINGS LIMITED · CORPORATE MEMBER · Less than 5% · control person
- ListedACASTA PARTNERS L.P. · SHAREHOLDER · 75% or more · indirect via ACASTA PARTNERS HOLDINGS LIMITED · control person
- ListedCOTE, SEAN, ANDREW · MEMBER OF MANAGEMENT COMMITTEE · Less than 5% · control person
- ListedClarke, Joseph, Nelson · CHIEF OPERATING OFFICER, CO-HEAD · Less than 5% · control person
- ListedHUMPHRIES, MICHAEL, JAMES · LIMITED PARTNER/MEMBER OF MANAGEMENT COMMITTEE · 75% or more · control person
- ListedHUMPHRIES, MICHAEL, JAMES · LIMITED PARTNER · 50–75% · indirect via ACASTA PARTNERS L.P. · control person
- ListedHUMPHRIES, MICHAEL, JAMES · FOUNDING MEMBER · 50–75% · indirect via ACASTA PARTNERS GP LLC · control person
- ListedPearce, Liam, Christopher · CHIEF FINANCIAL OFFICER · Less than 5% · control person
- ListedSCHEEHLE, STACY, FELICE · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ListedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TFG ASSET MANAGEMENT GP LTD. · control person
- ListedTETRAGON FINANCIAL GROUP LIMITED · SHAREHOLDER · 75% or more · indirect via TFG ASSET MANAGEMENT TOPCO LTD. · control person
- ListedTETRAGON PARTNERS L.P. · LIMITED PARTNER · 25–50% · indirect via ACASTA PARTNERS L.P. · control person
- ListedTETRAGON PARTNERS L.P. · TFG ASSET MANAGEMENT MEMBER · 25–50% · indirect via ACASTA PARTNERS GP LLC · control person
- ListedTFG ASSET MANAGEMENT GP LTD. · GENERAL PARTNER · General partner, trustee or manager · indirect via TFG ASSET MANAGEMENT L.P. · control person
- ListedTFG ASSET MANAGEMENT TOPCO LTD. · LIMITED PARTNER · 75% or more · indirect via TFG ASSET MANAGEMENT L.P. · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Trims
- iShares iBoxx $ High Yield Corporate Bond ETF-$2.9M -18.4%
- Ramaco Resources, Inc.-$2.2M -14.6%
- Celcuity Inc.-$891.4K -19.8%
- USA Rare Earth, Inc.-$734.2K -34.8%
- Cameco Corporation-$335.2K -14.9%
New Positions
- JAZZ INVESTMENTS I LTD$28.4M
- Office Properties Income Trust$8.6M
- Viridian Therapeutics, Inc.$5.7M
- Celcuity Inc.$2.4M
- New Fortress Energy Inc.$182.7K
Acasta Partners UK LLP Holdings (2026-09-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | Alibaba Group Holding Limited | BABAF | 01609WBG6 | $84.5M | 37.88% | 67,500,000 | PRN |
| 2 | Lithium Argentina AG | LAR | 53680QAA6 | $31.1M | 13.94% | 31,509,000 | PRN |
| 3 | JAZZ INVESTMENTS I LTD | JAZZ | 472145AH4 | $28.4M | 12.72% | 17,500,000 | PRN |
| 4 | McEwen Inc | MUX | 58039PAB3 | $18.5M | 8.28% | 10,000,000 | PRN |
| 5 | iShares iBoxx $ High Yield Corporate Bond ETF | HYG | 464288513 | $13.0M | 5.82% | 168,095 | SH |
| 6 | Ramaco Resources, Inc. | METC | 75134PAB1 | $12.6M | 5.65% | 20,000,000 | PRN |
| 7 | Office Properties Income Trust | OPI | 67623C307 | $8.6M | 3.87% | 541,721 | SH |
| 8 | Viridian Therapeutics, Inc. | VRDN | 92790CAB0 | $5.7M | 2.57% | 5,000,000 | PRN |
| 9 | Hudbay Minerals Inc. | HBM | 443628102 | $5.3M | 2.36% | 197,352 | SH |
| 10 | Celcuity Inc. | CELC | 15102KAA8 | $3.6M | 1.62% | 2,000,000 | PRN |
| 11 | Celcuity Inc. | CELC | 15102KAB6 | $2.4M | 1.08% | 2,500,000 | PRN |
| 12 | Cameco Corporation | CCJ | 13321L108 | $1.9M | 0.86% | 22,115 | SH |
| 13 | Arrowhead Pharmaceuticals, Inc. | ARWR | 04280AAC4 | $1.5M | 0.69% | 1,500,000 | PRN |
| 14 | USA Rare Earth, Inc. | USAR | 91733P107 | $1.4M | 0.62% | 97,900 | SH |
| 15 | Uranium Energy Corp. | UEC | 916896103 | $1.3M | 0.60% | 142,616 | SH |
| 16 | IsoEnergy Ltd (Pre-Reincorporation) | ISOU | 46500E867 | $1.3M | 0.60% | 150,700 | SH |
| 17 | NexGen Energy Ltd. | NXE | 65340P106 | $1.2M | 0.54% | 131,787 | SH |
| 18 | Blue Moon Metals Inc. | BMM | 09570Q509 | $498.9K | 0.22% | 100,000 | SH |
| 19 | New Fortress Energy Inc. | NFE | 644393308 | $182.7K | 0.08% | 29,139 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-09-30 | 2026-10-05 | $223.2M | 19 | 0002090007-26-000007 |
| 2026-06-30 | 2026-07-06 | $189.5M | 18 | 0002090007-26-000005 |
| 2026-03-31 | 2026-05-14 | $263.0M | 21 | 0002090007-26-000004 |
| 2025-12-31 | 2026-02-13 | $281.0M | 19 | 0002090007-26-000002 |
LONDON SW1X 9DQ