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AdvisorCensus / Financial advisors / Massachusetts / Boston / Millstreet Capital Management LLC

Millstreet Capital Management LLC

Boston, MASEC-registered investment adviserCRD 161566

Filed as MILLSTREET CAPITAL MANAGEMENT LLC

Millstreet Capital Management LLC 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 March 30, 2026.

14 years
registered since 2012
$5,821,270,178
assets under management
2 arrangements
Percentage of assets, Performance-based
None
disclosure items (Item 11)

Quick answers

From the filing

How is Millstreet Capital Management LLC compensated?

On its Form ADV (Item 5.E, October 2026), Millstreet Capital Management LLC reports these compensation arrangements: a percentage of assets under its management; performance-based fees.

Where is Millstreet Capital Management LLC located?

Millstreet Capital Management LLC's principal office is in Boston, MA, according to its Form ADV.

Is Millstreet Capital Management LLC registered with the SEC or a state?

Millstreet Capital Management LLC is an SEC-registered investment advisory firm, registered since 2012. Status as filed: Approved. CRD 161566.

How much does Millstreet Capital Management LLC manage?

Millstreet Capital Management LLC reports $5,821,270,178 in regulatory assets under management in its Form ADV filing dated March 30, 2026 (100% discretionary).

How have Millstreet Capital Management LLC's assets and staff changed since 2021?

In the Form ADV data for Millstreet Capital Management LLC: Regulatory assets under management: $808,685,342 in the October 2021 data and $5,821,270,178 in the October 2026 data, up 620%. Total employees: 8 in October 2021 and 14 in October 2026. Assets under management move with markets as well as with clients coming and going.

What types of clients does Millstreet Capital Management LLC 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 Millstreet Capital Management LLC use?

Millstreet Capital Management LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists State Street Bank & Trust Co. as a custodian holding 10% or more of its separately managed account assets.

Does Millstreet Capital Management 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/161566

What changed in Millstreet Capital Management LLC's recent Form ADV filings?

In the April 2026 filing data: Employees performing advisory functions went from 4 to 5. Regulatory assets under management went from $4,133,696,846 to $5,821,270,178 (+41%).

From the Form ADV filing

Every figure below is as the firm filed it with regulators, as of October 2026.

How the firm is compensated

Item 5.E
  • A percentage of assets under your management
  • Performance-based fees

Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ

Fees and minimums

Form ADV Part 2A

See the firm's brochure (dated March 30, 2026) for its fees and any account minimum, on the SEC's IAPD site.

Regulatory assets under management

Item 5.F
$5,821,270,178

$5,821,270,178 as of October 2026, filing dated March 30, 2026.

Discretionary: $5,821,270,178.Non-discretionary: $0.

A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means

Who the firm serves

Item 5.D
Pooled investment vehicles (other than investment companies and business development companies)
Clients 2 Assets $5,196,810,682 (89%)
Other
Clients Fewer than 5 Assets $624,459,496 (11%)

A firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.

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

Registration and firm details

Items 1, 2, 5
Registration
SEC-registered investment adviser. Status as filed: Approved.
Registered since
2012 (14 years)
Employees
Total: 14. Performing investment advisory functions: 5.
Wrap fee program participation
No.
Custodians (Schedule D, Section 5.K(3))

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.

States registered or notice-filed
1 state or jurisdiction
MA

SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration

Disclosures

Item 11

None Reports no disclosure items on Form ADV Item 11. View on IAPD.

Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures

Assets and staff over time

Items 5.A, 5.F
$809M 2021 $1.19B 2022 $1.77B 2023 $2.97B 2024 $4.13B 2025 $5.82B 2026
Data periodAssets under managementEmployeesFiling dated
October 2026$5,821,270,17814March 30, 2026
October 2025$4,133,696,84612March 28, 2025
October 2024$2,966,827,99312March 28, 2024
October 2023$1,773,850,33811March 30, 2023
October 2022$1,188,249,48610March 31, 2022
October 2021$808,685,3428March 31, 2021

Regulatory assets under management: $808,685,342 in the October 2021 data and $5,821,270,178 in the October 2026 data, up 620%.

Total employees: 8 in October 2021 and 14 in October 2026.

As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.

Changes in the filing

Last 12 months
  1. April 2026
    • Employees performing advisory functions went from 4 to 5.
    • Regulatory assets under management went from $4,133,696,846 to $5,821,270,178 (+41%).

Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.

Websites listed on Form ADV

Item 1.I
millstreet.com

Source: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."

Cite this page

AdvisorCensus. Millstreet Capital Management LLC (CRD 161566): Form ADV filing data as of October 2026.
https://advisorcensus.com/firm/millstreet-capital-management-llc-boston-ma-161566