# Flatiron RR LLC, Manager Series

> Flatiron RR LLC, Manager Series is an SEC-registered investment advisory firm in New York, NY, registered since 2021, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated March 31, 2026.

- CRD: 314505
- Filed as: FLATIRON RR LLC, MANAGER SERIES
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: New York, NY
- Filing period: October 2026
- Form ADV filing dated: March 31, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/314505
- AdvisorCensus page: https://advisorcensus.com/firm/flatiron-rr-llc-manager-series-new-york-ny-314505

## Quick answers

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

**Where is Flatiron RR LLC, Manager Series located?**
Flatiron RR LLC, Manager Series' principal office is in New York, NY, according to its Form ADV.

**Is Flatiron RR LLC, Manager Series registered with the SEC or a state?**
Flatiron RR LLC, Manager Series is an SEC-registered investment advisory firm, registered since 2021. Status as filed: Approved. CRD 314505.

**How much does Flatiron RR LLC, Manager Series manage?**
Flatiron RR LLC, Manager Series reports $1,197,660,337 in regulatory assets under management in its Form ADV filing dated March 31, 2026 (100% discretionary).

**How have Flatiron RR LLC, Manager Series' assets and staff changed since 2021?**
In the Form ADV data for Flatiron RR LLC, Manager Series: Regulatory assets under management: $400,000,000 in the October 2022 data and $1,197,660,337 in the October 2026 data, up 199%. Total employees: 18 in October 2021 and 19 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Flatiron RR LLC, Manager Series serve?**
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (3).

**Does Flatiron RR LLC, Manager Series report any disciplinary disclosures?**
Reports 2 disclosure items on Form ADV Item 11: yes answers to 11.D(2) (another regulator's finding of a violation) and 11.D(4) (another regulator's order in the past ten years). Each question covers the firm and its advisory affiliates, and one event can produce several yes answers. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/314505

**What changed in Flatiron RR LLC, Manager Series' recent Form ADV filings?**
In the April 2026 filing data: Its Item 11 disclosure answers changed. Regulatory assets under management went from $798,589,346 to $1,197,660,337 (+50%). 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

### Regulatory assets under management (Item 5.F)
- Total: $1,197,660,337
- Discretionary: $1,197,660,337
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 3 | $1,197,660,337 |

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

### Firm details
- Registered since: 2021 (5 years)
- Employees: 19 total, 19 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: DE, NY
- Disclosures (Item 11): Reports 2 disclosure items on Form ADV Item 11.

### Item 11 questions answered yes
- 11.D(2): Has another federal regulator, a state regulator, or a foreign financial regulator ever found that the firm or an advisory affiliate was involved in a violation of investment-related regulations or statutes?
- 11.D(4): In the past ten years, has another federal regulator, a state regulator, or a foreign financial regulator entered an order against the firm or an advisory affiliate in connection with investment-related activity?

Each question covers the firm and its advisory affiliates: its current employees other than clerical staff, its officers, partners, and directors, and anyone who controls the firm or is controlled by it. One event can produce yes answers to several questions. SEC-registered advisers and exempt reporting advisers may leave out events more than ten years old, and may answer 11.A(2) and 11.B(2) for pending charges only. The detail of each yes answer is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/314505

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | Not reported | 18 | July 13, 2021 |
| October 2022 | $400,000,000 | 18 | June 14, 2022 |
| October 2023 | $472,180,801 | 20 | March 30, 2023 |
| October 2024 | $399,157,104 | 20 | March 28, 2024 |
| October 2025 | $798,589,346 | 19 | April 30, 2025 |
| October 2026 | $1,197,660,337 | 19 | March 31, 2026 |

Regulatory assets under management: $400,000,000 in the October 2022 data and $1,197,660,337 in the October 2026 data, up 199%.
Total employees: 18 in October 2021 and 19 in October 2026.

## Changes in the filing (last 12 months)

### April 2026
- Its Item 11 disclosure answers changed.
- Regulatory assets under management went from $798,589,346 to $1,197,660,337 (+50%).
- Updated its list of owners and control persons (Schedule A).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Flatiron RR LLC, Manager Series (CRD 314505): Form ADV filing data as of October 2026.