# ATL Advisor LP

> ATL Advisor LP is an SEC-registered investment advisory firm in New York, NY, registered since 2015, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated September 25, 2026.

- CRD: 173866
- Filed as: ATL ADVISOR LP
- Also doing business as: ATL PARTNERS
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: New York, NY
- Filing period: October 2026
- Form ADV filing dated: September 25, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/173866
- AdvisorCensus page: https://advisorcensus.com/firm/atl-advisor-lp-new-york-ny-173866

## Quick answers

**How is ATL Advisor LP compensated?**
On its Form ADV (Item 5.E, October 2026), ATL Advisor LP reports these compensation arrangements: a percentage of assets under its management; performance-based fees; other. The amounts are in Item 5 of its Form ADV Part 2A brochure.

**Where is ATL Advisor LP located?**
ATL Advisor LP's principal office is in New York, NY, according to its Form ADV.

**Is ATL Advisor LP registered with the SEC or a state?**
ATL Advisor LP is an SEC-registered investment advisory firm, registered since 2015. Status as filed: Approved. CRD 173866.

**How much does ATL Advisor LP manage?**
ATL Advisor LP reports $1,573,446,000 in regulatory assets under management in its Form ADV filing dated September 25, 2026 (100% discretionary).

**How have ATL Advisor LP's assets and staff changed since 2021?**
In the Form ADV data for ATL Advisor LP: Regulatory assets under management: $717,259,000 in the October 2021 data and $1,573,446,000 in the October 2026 data, up 119%. Total employees: 16 in October 2021 and 13 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does ATL Advisor LP serve?**
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (7).

**Does ATL Advisor LP report any disciplinary disclosures?**
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/173866

**What changed in ATL Advisor LP's recent Form ADV filings?**
In the April 2026 filing data: Employees performing advisory functions went from 9 to 11. Regulatory assets under management went from $1,341,648,000 to $1,573,446,000 (+17%). Updated its list of owners and control persons (Schedule A).

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management
- Performance-based fees
- Other

### Regulatory assets under management (Item 5.F)
- Total: $1,573,446,000
- Discretionary: $1,573,446,000
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 7 | $1,573,446,000 |

### Advisory services (Item 5.G)
- Portfolio management for pooled investment vehicles (other than investment companies)

### Firm details
- Registered since: 2015 (11 years)
- Employees: 13 total, 11 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: NY
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- atlpartners.com
- LinkedIn @atl-partners

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $717,259,000 | 16 | March 31, 2021 |
| October 2022 | $1,302,111,000 | 16 | April 13, 2022 |
| October 2023 | $1,386,370,000 | 18 | April 5, 2023 |
| October 2024 | $1,394,334,000 | 18 | July 19, 2024 |
| October 2025 | $1,695,935,000 | 13 | April 29, 2025 |
| October 2026 | $1,573,446,000 | 13 | September 25, 2026 |

Regulatory assets under management: $717,259,000 in the October 2021 data and $1,573,446,000 in the October 2026 data, up 119%.
Total employees: 16 in October 2021 and 13 in October 2026.

## Changes in the filing (last 12 months)

### April 2026
- Employees performing advisory functions went from 9 to 11.
- Regulatory assets under management went from $1,341,648,000 to $1,573,446,000 (+17%).
- Updated its list of owners and control persons (Schedule A).

### January 2026
- Regulatory assets under management went from $1,695,935,000 to $1,341,648,000 (-21%).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. ATL Advisor LP (CRD 173866): Form ADV filing data as of October 2026.