Southernsun Asset Management Llc
- Regulatory AUM
- $749M
- Discretionary
- $749M
- Clients
- 84
- Avg AUM / client
- $8.9M
- Accounts
- 88
- Employees
- 15
AUM over time
Annual snapshots from Form ADV filings · as of Jul 29, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 54 | $17.8M | 2.37% |
| High net worth individuals | 13 | $32.3M | 4.31% |
| Investment companies | 4 | $393M | 52.4% |
| Pooled investment vehicles (non-investment companies) | 3 | $30.4M | 4.06% |
| Pension and profit sharing plans | 5 | $161M | 21.5% |
| Charitable organizations | 5 | $108M | 14.4% |
| Corporations and other businesses | Fewer than 5 clients | $6.9M | 0.91% |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| Liuna National (Industrial) Pension Fund Board Of Trustees Of The Liuna National (Industrial) Pension Fund | Washington, DC | 2024 |
| Jpmorgan Chase Retirement Plan Jpmorgan Chase Bank, National Association | 2024 | |
| Liuna Staff And Affiliates Pension Fund Board Of Trustees Of Liuna Staff And Affiliates Pension Fund | Washington, DC | 2024 |
People (6)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Cook, Michael, Whitman | Chairman/Principal/Mgmt Comm Mbr | Jan 2003 (24y) | ≈ 5% – 18.75% via Oakthorpe Partners Llc | |
| Halliday, William, P. | Chief Compliance Officer/Principal/Mgmt Comm Mbr | Dec 2006 (20y) | 10% – 25% | |
| Cook, Phillip, Whitman | Chief Investment Officer/Managing Partner/Principal/Mgmt Comm Mbr | Jan 2009 (18y) | 5% – 10% | |
| Michael Scott Cross | Portfolio Manager/Principal | Jan 2009 (18y) | 5% – 10% | |
| Mcneely, Ashley, Phelps | Chief Financial Officer | Jan 2020 (7y) | Less than 5% | |
| Wimmer, Angela, Morgan | President/Principal | Oct 2023 (3y) | Less than 5% |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Tigertail Investment Company Limited Partnership | Member | Aug 2020 | A | 25% – 50% |
| Oakthorpe Partners Llc | Member | Dec 2012 | A | 10% – 25% |
Undisclosed: 0% – 20% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Cook, Michael, Whitman: 50% – 75% of Oakthorpe Partners Llc × 10% – 25% direct ≈ 5% – 18.75% 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.
Retirement plans served (3)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| Liuna National (Industrial) Pension Fund | Board Of Trustees Of The Liuna National (Industrial) Pension Fund | 17,932 | $1.5B | 01/01/2024 |
| Jpmorgan Chase Retirement Plan | Jpmorgan Chase Bank, National Association | 78,270 | $16.1B | 01/01/2024 |
| Liuna Staff And Affiliates Pension Fund | Board Of Trustees Of Liuna Staff And Affiliates Pension Fund | 3,600 | $1.9B | 01/01/2024 |
From Form 5500 service-provider disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/30/2026 | 1.07 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
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- Goldman Sachs $301M (12% of AUM) Nov 2018
- RBC $94.8M (6% of AUM) Mar 2019
- BNY Mellon $86.4M (12% of AUM) Mar 2026
- Raymond James $71.8M (6% of AUM) Sep 2020
- State Street $60.7M (8% of AUM) Mar 2026
- J.P. Morgan $46.1M (6% of AUM) Mar 2026
- Comerica Bank Trust National Association $44.6M (5% of AUM) Jun 2021
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports it does not have 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: Jul 29, 2026.
View current Form ADV (SEC/IAPD) ↗