# Nierenberg Investment Management Company, LLC

> Nierenberg Investment Management Company, LLC is an SEC-registered investment advisory firm, registered since 2012, reporting $100 million to $500 million in regulatory assets under management in its Form ADV filing dated March 13, 2026.

- CRD: 155416
- Filed as: NIERENBERG INVESTMENT MANAGEMENT COMPANY, LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Filing period: October 2026
- Form ADV filing dated: March 13, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/155416
- AdvisorCensus page: https://advisorcensus.com/firm/nierenberg-investment-management-company-llc-155416

## Quick answers

**How is Nierenberg Investment Management Company, LLC compensated?**
On its Form ADV (Item 5.E, October 2026), Nierenberg Investment Management Company, LLC reports these compensation arrangements: a percentage of assets under its management; other. The amounts are in Item 5 of its Form ADV Part 2A brochure.

**Is Nierenberg Investment Management Company, LLC registered with the SEC or a state?**
Nierenberg Investment Management Company, LLC is an SEC-registered investment advisory firm, registered since 2012. Status as filed: Approved. CRD 155416.

**How much does Nierenberg Investment Management Company, LLC manage?**
Nierenberg Investment Management Company, LLC reports $235,480,967 in regulatory assets under management in its Form ADV filing dated March 13, 2026 (100% discretionary).

**How have Nierenberg Investment Management Company, LLC's assets and staff changed since 2021?**
In the Form ADV data for Nierenberg Investment Management Company, LLC: Regulatory assets under management: $127,370,162 in the October 2021 data and $235,480,967 in the October 2026 data, up 85%. Total employees: 5 in October 2021 and 3 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Nierenberg Investment Management Company, LLC serve?**
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (3); corporations or other businesses not listed above (1).

**Which custodians does Nierenberg Investment Management Company, LLC use?**
Nierenberg Investment Management Company, LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Goldman Sachs & Co. LLC as a custodian holding 10% or more of its separately managed account assets.

**Does Nierenberg Investment Management Company, LLC 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/155416

**What changed in Nierenberg Investment Management Company, LLC's recent Form ADV filings?**
In the April 2026 filing data: Regulatory assets under management went from $204,346,704 to $235,480,967 (+15%). Employees performing advisory functions went from 3 to 2.

## From the Form ADV filing

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

### Custodians (Schedule D, Section 5.K(3))
- Goldman Sachs & Co. LLC

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

### Regulatory assets under management (Item 5.F)
- Total: $235,480,967
- Discretionary: $235,480,967
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 3 | $231,007,186 |
| Corporations or other businesses not listed above | 1 | $4,473,781 |

### Advisory services (Item 5.G)
- Portfolio management for individuals and/or small businesses
- Portfolio management for pooled investment vehicles (other than investment companies)

### Firm details
- Registered since: 2012 (14 years)
- Employees: 3 total, 2 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: WA
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- [d3familyfunds.com](https://d3familyfunds.com)
- LinkedIn @nierenberg-investment-management-company-inc.

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $127,370,162 | 5 | March 22, 2021 |
| October 2022 | $145,286,112 | 5 | March 22, 2022 |
| October 2023 | $138,206,582 | 5 | June 7, 2023 |
| October 2024 | $174,454,363 | 5 | March 18, 2024 |
| October 2025 | $204,346,704 | 5 | March 11, 2025 |
| October 2026 | $235,480,967 | 3 | March 13, 2026 |

Regulatory assets under management: $127,370,162 in the October 2021 data and $235,480,967 in the October 2026 data, up 85%.
Total employees: 5 in October 2021 and 3 in October 2026.

## Changes in the filing (last 12 months)

### April 2026
- Regulatory assets under management went from $204,346,704 to $235,480,967 (+15%).
- Employees performing advisory functions went from 3 to 2.

### March 2026
- Updated its list of owners and control persons (Schedule A).

### February 2026
- Changed its legal name from Nierenberg Investment Management Company, Inc. to Nierenberg Investment Management Company, LLC.
- Reported a succession: took over the business of Nierenberg Investment Management Company, Inc. (CRD 155416) on December 15, 2025.

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Nierenberg Investment Management Company, LLC (CRD 155416): Form ADV filing data as of October 2026.