# Stockbridge Investors

> Stockbridge Investors is an SEC-registered investment advisory firm in Boston, MA, registered since 2012, reporting over $5 billion in regulatory assets under management in its Form ADV filing dated May 28, 2026.

- CRD: 160674
- Filed as: STOCKBRIDGE INVESTORS
- Legal name: Stockbridge Partners LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: May 28, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/160674
- AdvisorCensus page: https://advisorcensus.com/firm/stockbridge-investors-boston-ma-160674

## Quick answers

**How is Stockbridge Investors compensated?**
On its Form ADV (Item 5.E, October 2026), Stockbridge Investors 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 Stockbridge Investors located?**
Stockbridge Investors' principal office is in Boston, MA, according to its Form ADV; the June 2026 filing also lists 1 other office (Schedule D, Section 1.F).

**Is Stockbridge Investors registered with the SEC or a state?**
Stockbridge Investors is an SEC-registered investment advisory firm, registered since 2012. Status as filed: Approved. CRD 160674.

**How much does Stockbridge Investors manage?**
Stockbridge Investors reports $5,411,170,790 in regulatory assets under management in its Form ADV filing dated May 28, 2026 (100% discretionary).

**How have Stockbridge Investors' assets and staff changed since 2021?**
In the Form ADV data for Stockbridge Investors: Regulatory assets under management: $5,272,081,897 in the October 2021 data and $5,411,170,790 in the October 2026 data, up 3%. Total employees: 20 in October 2021 and 20 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Stockbridge Investors serve?**
By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (2).

**Which custodians does Stockbridge Investors use?**
Stockbridge Investors' most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Brown Brothers Harriman & Co. as a custodian holding 10% or more of its separately managed account assets.

**Does Stockbridge Investors 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/160674

**What changed in Stockbridge Investors' recent Form ADV filings?**
In the June 2026 filing data: 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

### Custodians (Schedule D, Section 5.K(3))
- Brown Brothers Harriman & Co.

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: $5,411,170,790
- Discretionary: $5,411,170,790
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Pooled investment vehicles (other than investment companies and business development companies) | 2 | $4,619,035,075 |
| Charitable organizations | Fewer than 5 | $792,135,715 |

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

### Firm details
- Registered since: 2012 (14 years)
- Employees: 20 total, 18 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: CA, MA
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Other offices (Schedule D, Section 1.F), as of the June 2026 filing
- San Francisco, CA

### Websites listed on Form ADV (Item 1.I)
- berkshirepartners.com/stockbridge
- LinkedIn @berkshire-partners

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $5,272,081,897 | 20 | March 30, 2021 |
| October 2022 | $5,867,663,788 | 20 | March 31, 2022 |
| October 2023 | $4,388,898,896 | 22 | March 31, 2023 |
| October 2024 | $5,860,523,219 | 21 | March 29, 2024 |
| October 2025 | $5,818,290,439 | 19 | June 4, 2025 |
| October 2026 | $5,411,170,790 | 20 | May 28, 2026 |

Regulatory assets under management: $5,272,081,897 in the October 2021 data and $5,411,170,790 in the October 2026 data, up 3%.
Total employees: 20 in October 2021 and 20 in October 2026.

## Changes in the filing (last 12 months)

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

### April 2026
- Changed its office addresses in San Francisco, CA.
- Updated its list of owners and control persons (Schedule A).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Stockbridge Investors (CRD 160674): Form ADV filing data as of October 2026.