Form D · Other Investment Fund

MacKay Municipal High Income Opportunities Fund LP

New York, NY · CIK 0001840206

Offering snapshot reported Jan 13, 2026 · SEC filing

Reported sold: $862M
Investors reported: 1,248
Minimum accepted: $250K
First sale: Jan 4, 2021

Fundraising history

Reported sold

Dates are filing dates, not cash receipt dates. Decreases are reported revisions, not evidence of withdrawals. Separate offering histories are not added together.

What changed?

Latest filing versus its linked predecessor, where available.

Reported sold$819,538,451 → $862,456,982
Reported investors1,221 → 1,248

Filing history

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Filed	Filing type	Reported sold	Change vs linked filing	Investors	Source
Jan 13, 2026	Amendment	$862,456,982	$42,918,531vs Jan 13, 2025	1,248	SEC filing
Jan 13, 2025	Amendment	$819,538,451	$123,197,899vs Jan 12, 2024	1,221	SEC filing
Jan 12, 2024	Amendment	$696,340,552	$171,791,510vs Jan 12, 2023	1,089	SEC filing
Jan 12, 2023	Amendment	$524,549,042	$162,184,766vs Jan 12, 2022	841	SEC filing
Jan 12, 2022	Amendment	$362,364,276	$329,604,836vs Jan 13, 2021	361	SEC filing
Jan 13, 2021	Initial	$32,759,440	No comparison	38	SEC filing

Offering details

Securities: Pooled investment fund, Other
Exemptions: 06b, 3C, 3C.7
Duration over one year: Yes
Business combination: No

Sales commissions: $9.1M (estimated)
Finders' fees: $0
Form D file number: 021-386117

Limited Partnership Interests

The Investment Manager of the Issuer shares a portion of its management fee received from the Issuer with one or more of the Issuer's placement agents. Such placement agents may receive other fees (e.g., sales loads) payable directly to

Sales compensation recipients

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Recipient	CRD	Associated broker-dealer
NYLIFE Distributors LLC	35350
Morgan Stanley Smith Barney LLC	149777
Raymond James & Associates, Inc.	705
Raymond James Financial Services, Inc.	6694
Rockefeller Financial LLC	291361
iCapital Markets LLC	118219
Merrill Lynch, Pierce, Fenner & Smith Incorporated	7691
UBS Financial Services, Inc.	8174
Wells Fargo Clearing Services, LLC	19616
Wells Fargo Advisors Financial Network, LLC	11025

Source: Form D, filed Jan 13, 2026. Minimum accepted may differ from a standard advertised minimum.

Fund connections

The linked fund shows its most recently reported ADV details.

Matched by reported Form D file number

MACKAY MUNICIPAL HIGH INCOME OPPORTUNITIES FUND LP

Investment adviser: MACKAY SHIELDS LLC

Gross asset value: $690M
Beneficial owners: 925
ADV minimum commitment: $250K

Reported in Form ADV on Aug 6, 2026. Fund assets and beneficial owners measure different things from Form D sales and investors.

Service providers

Fund administrator CITCO (CANADA) INC. TORONTO, Canada Investor statements: Yes (provided to all investors) Related to adviser: No

Fund administrator CITCO FUND SERVICES (CURACAO) B.V. WILLEMSTAD, Curacao Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor PRICEWATERHOUSECOOPERS LLP NEW YORK, New York, United States

Custodian PERSHING LLC JERSEY CITY, New Jersey, United States Related to adviser: No

Custodian TD SECURITIES (USA) LLC NEW YORK, New York, United States Related to adviser: No

Marketer ICAPITAL SECURITIES, LLC NEW YORK, New York, United States Related to adviser: No

Marketer MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, United States Related to adviser: No

Marketer MORGAN STANLEY PURCHASE, New York, United States Related to adviser: No

Marketer NYLIFE DISTRIBUTORS LLC JERSEY CITY, New Jersey, United States Related to adviser: Yes

Marketer RAYMOND JAMES & ASSOCIATES, INC. ST. PETERSBURG, Florida, United States Related to adviser: No

Marketer ROCKEFELLER CAPITAL MANAGEMENT NEW YORK, New York, United States Related to adviser: No

Marketer UBS FINANCIAL SERVICES INC. WEEHAWKEN, New Jersey, United States Related to adviser: No

Marketer WELLS FARGO ADVISORS ST. LOUIS, Missouri, United States Related to adviser: No

Prime broker PERSHING LLC JERSEY CITY, New Jersey, United States

Prime broker TD SECURITIES (USA) LLC NEW YORK, New York, United States

Provider details

Annual audit: Yes
Prime brokers: Yes
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: Yes

PRICEWATERHOUSECOOPERS LLP
PCAOB 238

PERSHING LLC
SEC 8-17574

TD SECURITIES (USA) LLC
SEC 8-36747

ICAPITAL SECURITIES, LLC
CRD 171061 · SEC 8-69443

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
CRD 7691 · SEC 801-14235

MORGAN STANLEY
CRD 149777 · SEC 801-70103

NYLIFE DISTRIBUTORS LLC
CRD 35350 · SEC 8-46655

RAYMOND JAMES & ASSOCIATES, INC.
CRD 705 · SEC 801-10418

ROCKEFELLER CAPITAL MANAGEMENT
CRD 291361 · SEC 801-114033

UBS FINANCIAL SERVICES INC.
CRD 8174 · SEC 801-7163

WELLS FARGO ADVISORS
CRD 11025 · SEC 801-57434

WELLS FARGO ADVISORS
CRD 19616 · SEC 801-37967

PERSHING LLC
CRD 7560 · SEC 8-17574

TD SECURITIES (USA) LLC
CRD 18476 · SEC 8-36747

Filing source

Form ADV 2124546 · Aug 6, 2026 · Schedule D 7.B.(1), fund 805-1950044267

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

People & organizations

Current and past Form D appearances. These existing records do not establish a person's current role or uniquely identify them across issuers.

People and organizations reported in Form D filings
Name	Reported role
Robert A. Di Mella	Executive
John M. Loffredo	Executive
N/A Mac Kay Municipal Managers High Income Opportunities Gp Llc	Promoter
N/A Mac Kay Shields Llc	Promoter
N/A Mac Kay Shields, Llc	Promoter

Issuer details

Industry: Pooled Investment Fund (See others in industry)

Address:

299 Park Avenue 32nd Floor
New York, NY, 10171