Aetos Alternatives Management, L.P.
SEC-registered
Institutional / Pension Advisor · Mid-sized ($1B–$10B)
CRD 116761
· SEC file 801-60760
· New York, NY
· www.linkedin.com
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ADV data as of Mar 25, 2026
- Regulatory AUM
- $5.8B
- Discretionary
- $925M
- Clients
- 104
- Avg AUM / client
- $55.7M
- Accounts
- 107
- Employees
- 19
AUM over time
$4.7B
$11.7B
Dec 2011
Dec 2025
Annual snapshots from Form ADV filings · as of Mar 25, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| High net worth individuals | 65 | — | — |
| Investment companies | 3 | $427M | 7.36% |
| Pooled investment vehicles (non-investment companies) | 7 | $4.9M | 0.08% |
| Pension and profit sharing plans | 13 | $2.6B | 45.7% |
| Charitable organizations | 16 | $2.7B | 46.9% |
| State or municipal government entities | Fewer than 5 clients | — | — |
| Corporations and other businesses | Fewer than 5 clients | — | — |
Private funds (8)
Reported in Form ADV Section 7.B.(1), filing of Jun 2024 · $553M combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| Aetos Capital Long/Short Strategies Cayman Fund feeder | Hedge Fund | Cayman Islands | $266M | 43 |
| Aetos Capital Multi Strategy Arbitrage Cayman Fund feeder | Hedge Fund | Cayman Islands | $209M | 36 |
| Aetos Capital Distressed Investment Strategies Cayman Fund feeder | Hedge Fund | Cayman Islands | $56.7M | 36 |
| Aetos Special Situations Opportunity Fund Lp | Private Equity Fund | Delaware | $11.1M | 3 |
| Aetos Sustainability Long/Short Fund, Lp | Hedge Fund | Delaware | $4.4M | 3 |
| Aetos Capital Long/Short Strategies Cayman Fund Ii feeder | Hedge Fund | Cayman Islands | $2.7M | 10 |
| Aetos Capital Multi Strategy Arbitrage Cayman Fund Ii feeder | Hedge Fund | Cayman Islands | $1.8M | 10 |
| Aetos Capital Distressed Investment Strategies Cayman Fund Ii feeder | Hedge Fund | Cayman Islands | $385K | 10 |
People (8)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Casscells, Rhea, Elizabeth Anne | Co President | Feb 2004 (23y) | 25% – 50% | |
| Klein, Michael, Frederick | Co President | Feb 2004 (23y) | 25% – 50% | |
| Sawyer, Scott, David | Chief Financial Officer | Aug 2004 (22y) | Less than 5% | |
| Allwin, Christopher, Francis | Trustee | Jul 2017 (9y) | GP / trustee / elected manager of James M Allwin 2001 Childrens' Trust (indirect) | |
| Allwin, Katrina, Persefone | Trustee | Jul 2017 (9y) | GP / trustee / elected manager of James M Allwin 2001 Childrens' Trust (indirect) | |
| Allwin, Maria | Member | Jul 2017 (9y) | ≈ 3.13% – 18.75% via The Allwin Family, Llc | |
| Schaaff, Harold, James | Limited Partner | Jul 2018 (8y) | 5% – 10% | |
| Baum, Marc, Lewis | Chief Compliance Officer And Chief Legal Officer | Jun 2024 (2y) | Less than 5% |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Aclp, Lp | Limited Partner | Jul 2018 | A | 25% – 50% |
| Aetos Alternatives Management, Llc | General Partner | Jul 2018 | A | Less than 5% |
| The Allwin Family, Llc | Limited Partner | May 1999 | B | ≈ 12.5% – 37.5% via Aclp, Lp |
| James M Allwin 2001 Childrens' Trust | Member | Jan 2001 | B | ≈ 3.13% – 18.75% via The Allwin Family, Llc |
| The 2017 Maria Allwin Grat No. 1 | Member | Sep 2017 | B | ≈ 3.13% – 18.75% via The Allwin Family, Llc |
| Aclp, Lp | Member | Jul 2018 | B | ≈ 0% – 2.5% via Aetos Alternatives Management, Llc |
| Aclp Gp, Llc | General Partner | Dec 2005 | B | GP / trustee / elected manager of Aclp, Lp (indirect) |
Undisclosed: 0% – 20% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Allwin, Maria: 25% – 50% of The Allwin Family, Llc × 50% – 75% of Aclp, Lp × 25% – 50% direct ≈ 3.13% – 18.75% of the firm
- The Allwin Family, Llc: 50% – 75% of Aclp, Lp × 25% – 50% direct ≈ 12.5% – 37.5% of the firm
- James M Allwin 2001 Childrens' Trust: 25% – 50% of The Allwin Family, Llc × 50% – 75% of Aclp, Lp × 25% – 50% direct ≈ 3.13% – 18.75% of the firm
- The 2017 Maria Allwin Grat No. 1: 25% – 50% of The Allwin Family, Llc × 50% – 75% of Aclp, Lp × 25% – 50% direct ≈ 3.13% – 18.75% of the firm
- Aclp, Lp: 25% – 50% of Aetos Alternatives Management, Llc × 0% – 5% direct ≈ 0% – 2.5% of the firm
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (8, $553M gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| Aetos Capital Long/Short Strategies Cayman Fund | Hedge Fund | $266M | $50.0K | 43 |
| Aetos Capital Multi Strategy Arbitrage Cayman Fund | Hedge Fund | $209M | $50.0K | 36 |
| Aetos Capital Distressed Investment Strategies Cayman Fund | Hedge Fund | $56.7M | $50.0K | 36 |
| Aetos Special Situations Opportunity Fund Lp | Private Equity Fund | $11.1M | $5.0M | 3 |
| Aetos Sustainability Long/Short Fund, Lp | Hedge Fund | $4.4M | $1.0M | 3 |
| Aetos Capital Long/Short Strategies Cayman Fund Ii | Hedge Fund | $2.7M | $50.0K | 10 |
| Aetos Capital Multi Strategy Arbitrage Cayman Fund Ii | Hedge Fund | $1.8M | $50.0K | 10 |
| Aetos Capital Distressed Investment Strategies Cayman Fund Ii | Hedge Fund | $385K | $50.0K | 10 |
From Form ADV Section 7.B private fund reporting.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/25/2026 | 2.42 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Performance-based fees
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
- • Selection of other advisers
Custody
Reported custodians
- State Street $4.8B (83% of AUM) Mar 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 25, 2026.
View current Form ADV (SEC/IAPD) ↗