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RIA / WealthRegistered adviserasset managerSEC registeredRAUM 1b 10b

WESTCHESTER CAPITAL MANAGEMENT, LLC

CRD 155686

VALHALLA, NY

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Search this name across graphsid dfx:ria:548a8c21-0949-e85a-3c2d-bd9e399fc52e

Data as of Mar 30, 2026 (this record's last observation) from federal regulator filings. Page built Sep 19, 2026, 1:01 PM UTC and rebuilt at most every 15 minutes.

Relationships: 41
Dated events: 13
On other graphs: 0
Observed: Mar 16, 2012 to Mar 30, 2026
22 observations

Across DFX

This entity has not been resolved onto another DFX graph by a shared identifier. A name match elsewhere would be a candidate, never an identity, and none is recorded.

Facts

fact = as filed or announced; derived = computed by DFX; estimate = a band, never a point

Firm class: asset managerderivedprivate_client_share=0.0 fund_share=1.0 institutional_share=0.0 related_bd=true related_bank=true bd_reps=0.0
Regulatory AUM: $2.9BItem 5.F on the latest filing (2026-03-30); as reported, and an affiliate's assets may be counted again on its own filing
Discretionary RAUM: $2.9B
Private client RAUM: $0derivedItem 5.D individuals plus high net worth individuals
Private client share: 0%derivedprivate client RAUM over total RAUM
Advisors on IAPD: 0
Employees: 10
Advisory employees: 6
Offices: 0Schedule D 1.F, beyond the principal office
Accounts: 7
Individual clients: 0
High net worth clients: 0
SEC number: 801-72002
CIK: 1512805
CRD: 155686
Filings on the tape: 22
First filed: Mar 16, 2012
Latest filed: Mar 30, 2026
Organised: Limited Liability Company, DE

Private funds

Schedule D 7.B(1); gross asset value as reported, never fund size; reporting ends 2024-12-31

Fund	Type	Reported GAV	As of	Owners	First reported	Status	Form D file
MERRILL LYNCH INVESTMENT SOLUTIONS--WESTCHESTER MERGER ARBITRAGE UCITS FUND	Other Private Fund	$7.3M	Aug 4, 2016	5	Apr 1, 2013	dropped	021-162510

Owners and control persons

Schedule A and B as filed; ownership codes are the form's bands (NA under 5%, A 5 to 10%, B 10 to 25%, C 25 to 50%, D 50 to 75%, E over 75%); people are listed as filed and never merged by name

Owner	Title	Ownership code	Control person	Acquired	First seen	Last seen
ANGERTHAL, MICHAEL, AARON	EXECUTIVE VICE PRESIDENT	Na	yes	10/2021	Oct 15, 2021	Mar 28, 2024
AYLWARD, GEORGE, ROBERT	CHIEF EXECUTIVE OFFICER	Na	yes	10/2021	Oct 15, 2021	Mar 28, 2024
BEHREN, ROY, DOUGLAS	CO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER	Na	yes	10/2021	Mar 16, 2012	Mar 28, 2024
COLOMB, CHRISTOPHER, J	CHIEF OPERATIONS OFFICER	Na	yes	10/2021	Aug 10, 2021	Mar 28, 2024
PURKALITIS, ANDRA, CYNTHIA	EXECUTIVE VICE PRESIDENT AND CHIEF LEGAL OFFICER	Na	yes	11/2023	Dec 7, 2023	Mar 28, 2024
SHANNON, MICHAEL, THOMAS	CO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER	Na	yes	10/2021	Mar 16, 2012	Mar 28, 2024
SMIRL, RICHARD, WILLIAM	EXECUTIVE VICE PRESIDENT	Na	yes	10/2021	Oct 15, 2021	Mar 28, 2024
VIRTUS INVESTMENT PARTNERS, INC.	SOLE SHAREHOLDER	E	yes	10/2021	Oct 15, 2021	Mar 28, 2024
VIRTUS PARTNERS, INC.	SOLE MEMBER	E	yes	10/2021	Oct 15, 2021	Mar 28, 2024
WU, CASAUNDRA, LEE	ASSISTANT MANAGING DIRECTOR AND CHIEF COMPLIANCE OFFICER	Na	yes	10/2021	Aug 10, 2021	Mar 28, 2024

Affiliates (Item 7.A)

as filed on Item 7.A; a related person with a CRD on the graph links to its own page

Related person	Type	Class on the graph	Its RAUM	Control	Common control	State
VIRTUS INVESTMENT ADVISERS, INC.	n/a	Asset manager	$52B	N	yes	n/a
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT, LLC	n/a	Mixed wealth	$39B	N	yes	n/a
VIRTUS FIXED INCOME ADVISERS, LLC	n/a	Other adviser	$35B	N	yes	n/a
SUSTAINABLE GROWTH ADVISERS, LP	n/a	Asset manager	$17B	N	yes	n/a
DUFF & PHELPS INVESTMENT MANAGEMENT CO.	n/a	Asset manager	$13B	N	yes	n/a
CEREDEX VALUE ADVISORS LLC	n/a	Other adviser	$3.4B	N	yes	n/a
ALPHASIMPLEX GROUP, LLC	n/a	Asset manager	$3.1B	N	yes	n/a
SILVANT CAPITAL MANAGEMENT LLC	n/a	Asset manager	$3.0B	N	yes	n/a
NFJ INVESTMENT GROUP, LLC	n/a	Asset manager	$3.0B	N	yes	n/a
VIRTUS FUND ADVISERS, LLC	n/a	Other adviser	$1.5B	N	yes	n/a
VIRTUS ETF ADVISERS LLC	n/a	Other adviser	$1.4B	N	yes	n/a
VIRTUS ALTERNATIVE INVESTMENT ADVISERS, INC.	n/a	Asset manager	$1.1B	N	yes	n/a
SEIX CLO MANAGEMENT LLC	n/a	Asset manager	$336M	N	yes	n/a
WESTCHESTER CAPITAL PARTNERS, LLC	n/a	Asset manager	$34.2M	N	yes	n/a
SEIX CLO MANAGEMENT GP LLC	n/a	n/a	n/a	N	yes	n/a
VIRTUS GLOBAL PARTNERS PTE. LTD.	n/a	n/a	n/a	N	yes	n/a
VIRTUS INTERNATIONAL FUND MANAGEMENT LIMITED	n/a	n/a	n/a	N	yes	n/a
VIRTUS INTERNATIONAL MANAGEMENT LLP	n/a	n/a	n/a	N	yes	n/a
VP DISTRIBUTORS LLC	n/a	n/a	n/a	N	yes	n/a

Regulatory AUM by fiscal year

annual amendments (and the roster's annual snapshot) as filed; where a year was amended twice the later filing draws the line

Fiscal year	Filed	RAUM	Discretionary	Employees	Advisory staff	Offices	Private funds	Fund GAV
2025	Mar 30, 2026	$2.9B	$2.9B	10	6	0	n/a	n/a
2024	Mar 28, 2025	$2.8B	$2.8B	11	6	0	n/a	n/a
2023	Mar 28, 2024	$4.0B	$4.0B	14	7	0	n/a	n/a
2022	Mar 30, 2023	$5.3B	$5.3B	14	7	0	n/a	n/a
2021	Mar 31, 2022	$5.3B	$5.3B	13	7	0	n/a	n/a
2020	Mar 31, 2021	$4.7B	$4.7B	18	7	0	n/a	n/a
2019	Mar 27, 2020	$4.2B	$4.2B	18	7	0	n/a	n/a
2018	Mar 29, 2019	$4.0B	$4.0B	18	7	0	n/a	n/a
2017	Mar 30, 2018	$2.8B	$2.8B	18	7	0	n/a	n/a
2016	Mar 28, 2017	$3.8B	$3.8B	16	7	n/a	n/a	n/a
2015	Mar 24, 2016	$5.4B	$5.4B	16	7	n/a	1	$7.3M
2014	Mar 31, 2015	$5.7B	$5.7B	15	6	n/a	1	$13.8M
2013	Mar 31, 2014	$5.4B	$5.4B	14	6	n/a	1	$13.7M
2012	Apr 1, 2013	$4.7B	$4.7B	13	6	n/a	1	$21.2M
2011	Mar 16, 2012	$5.2B	$5.2B	n/a	n/a	n/a	n/a	n/a

Growth

derived from consecutive annual filings; RAUM as reported

Latest fiscal year	RAUM	A year earlier	1y change	Three years earlier	3y CAGR	Employees	A year earlier	Offices	A year earlier
2025	$2.9B	$2.8B	2.5%	$5.3B	-18.6%	10	11	0	0

Relationships

Affiliated with (30)

← VIRTUS INVESTMENT ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← VIRTUS CAPITAL ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← VIRTUS ALTERNATIVE INVESTMENT ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← WESTCHESTER CAPITAL PARTNERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← SEIX CLO MANAGEMENT LLCRegistered adviserother investment adviser, common control
factForm ADV
← DUFF & PHELPS INVESTMENT MANAGEMENT CO.Registered adviserother investment adviser, bank, common control
factForm ADV
→ KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT, LLCRegistered adviserother investment adviser, common control
factForm ADV
→ VIRTUS INVESTMENT ADVISERS, LLCRegistered adviserother investment adviser, bank, pooled vehicle sponsor, common control
factForm ADV
→ DUFF & PHELPS INVESTMENT MANAGEMENT CO.Registered adviserother investment adviser, common control
factForm ADV
→ VIRTUS CAPITAL ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
→ SUSTAINABLE GROWTH ADVISERS, LPRegistered adviserother investment adviser, common control
factForm ADV
→ ALPHASIMPLEX GROUP, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
→ WESTCHESTER CAPITAL PARTNERS, LLCRegistered adviserother investment adviser, bank, pooled vehicle sponsor, common control
factForm ADV
→ VIRTUS ALTERNATIVE INVESTMENT ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
→ CEREDEX VALUE ADVISORS LLCRegistered adviserother investment adviser, common control
factForm ADV
→ SILVANT CAPITAL MANAGEMENT LLCRegistered adviserother investment adviser, common control
factForm ADV
→ VIRTUS FIXED INCOME ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
→ VIRTUS ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
→ SEIX CLO MANAGEMENT LLCRegistered adviserother investment adviser, common control
factForm ADV
→ NFJ INVESTMENT GROUP, LLCRegistered adviserother investment adviser, common control
factForm ADV
← SUSTAINABLE GROWTH ADVISERS, LPRegistered adviserother investment adviser, bank, common control
factForm ADV
← VIRTUS FIXED INCOME ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← ALPHASIMPLEX GROUP, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← CEREDEX VALUE ADVISORS LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← SILVANT CAPITAL MANAGEMENT LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← VIRTUS ADVISERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← NFJ INVESTMENT GROUP, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← STONE HARBOR INVESTMENT PARTNERS, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV
← NEWFLEET ASSET MANAGEMENT, LLCRegistered adviserother investment adviser, bank, common control
factForm ADV

Controls (10)

← SHANNON, MICHAEL, THOMASOwnerCO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER, ownership code NA, individual
Mar 16, 2012 to Mar 28, 2024factForm ADV
← PURKALITIS, ANDRA, CYNTHIAOwnerEXECUTIVE VICE PRESIDENT AND CHIEF LEGAL OFFICER, ownership code NA, individual
Dec 7, 2023 to Mar 28, 2024factForm ADV
← SMIRL, RICHARD, WILLIAMOwnerEXECUTIVE VICE PRESIDENT, ownership code NA, individual
Oct 15, 2021 to Mar 28, 2024factForm ADV
← BEHREN, ROY, DOUGLASOwnerCO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER, ownership code NA, individual
Mar 16, 2012 to Mar 28, 2024factForm ADV
← AYLWARD, GEORGE, ROBERTOwnerCHIEF EXECUTIVE OFFICER, ownership code NA, individual
Oct 15, 2021 to Mar 28, 2024factForm ADV
← COLOMB, CHRISTOPHER, JOwnerCHIEF OPERATIONS OFFICER, ownership code NA, individual
Aug 10, 2021 to Mar 28, 2024factForm ADV
← ANGERTHAL, MICHAEL, AARONOwnerEXECUTIVE VICE PRESIDENT, ownership code NA, individual
Oct 15, 2021 to Mar 28, 2024factForm ADV
← WU, CASAUNDRA, LEEOwnerASSISTANT MANAGING DIRECTOR AND CHIEF COMPLIANCE OFFICER, ownership code NA, individual
Aug 10, 2021 to Mar 28, 2024factForm ADV
← VIRTUS INVESTMENT PARTNERS, INC.OwnerSOLE SHAREHOLDER, ownership code E, domestic entity
Oct 15, 2021 to Mar 28, 2024factForm ADV
← VIRTUS PARTNERS, INC.OwnerSOLE MEMBER, ownership code E, domestic entity
Oct 15, 2021 to Mar 28, 2024factForm ADV

Advises (1)

→ MERRILL LYNCH INVESTMENT SOLUTIONS--WESTCHESTER MERGER ARBITRAGE UCITS FUNDPrivate fundOther Private Fund, IA, no longer reported
Apr 1, 2013 to Aug 4, 2016factForm ADV

Dated events

Occurred
Mar 28, 2025
Regulatory AUM changed
Westchester Capital Management, Llc reported RAUM $2.8B, down 29% from $4.0B (2024-03-28 to 2025-03-28)
Form ADVobserved 4 days ago
$-1.2B
Occurred
Mar 28, 2024
Regulatory AUM changed
Westchester Capital Management, Llc reported RAUM $4.0B, down 26% from $5.3B (2023-12-07 to 2024-03-28)
Form ADVobserved 4 days ago
$-1.4B
Occurred
Dec 7, 2023
Control person joined
Cynthia Andra Purkalitis (Executive Vice President And Chief Legal Officer) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Jun 20, 2023
Control person left
Jacqueline Wendy Hills (Executive Vice President, General Counsel And Secretary) no longer on Schedule A of Westchester Capital Management, Llc (listed 2023-03-30, absent 2023-06-20)
Form ADVobserved 4 days ago
Occurred
Oct 15, 2021
Control person joined
Robert George Aylward (Chief Executive Officer) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Oct 15, 2021
Control person joined
Aaron Michael Angerthal (Executive Vice President) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Oct 15, 2021
Control person joined
Jacqueline Wendy Hills (Executive Vice President, General Counsel And Secretary) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Oct 15, 2021
Control person joined
William Richard Smirl (Executive Vice President) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Aug 10, 2021
Control person left
Jay Bruce Rubin (Chief Compliance Officer And Chief Operating Officer) no longer on Schedule A of Westchester Capital Management, Llc (listed 2021-03-31, absent 2021-08-10)
Form ADVobserved 4 days ago
Occurred
Aug 10, 2021
Control person joined
Lee Casaundra Wu (Chief Compliance Officer) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Aug 10, 2021
Control person joined
J Christopher Colomb (Chief Financial Officer) appeared on Schedule A of Westchester Capital Management, Llc
Form ADVobserved 4 days ago
Occurred
Mar 29, 2019
Regulatory AUM changed
Westchester Capital Management, Llc reported RAUM $4.0B, up 42% from $2.8B (2018-03-30 to 2019-03-29)
Form ADVobserved 4 days ago
$1.2B
Occurred
Mar 30, 2018
Regulatory AUM changed
Westchester Capital Management, Llc reported RAUM $2.8B, down 25% from $3.8B (2017-03-28 to 2018-03-30)
Form ADVobserved 4 days ago
$-947M

Provenance

Graph: RIA / Wealth Management
Canonical id: dfx:ria:548a8c21-0949-e85a-3c2d-bd9e399fc52e
First observed: Mar 16, 2012
Last observed: Mar 30, 2026 5 months ago
Source families: Federal regulator filings
3 registered feeds stand behind this record; each fact above carries its own dates and, where the publisher serves one, its document.
Resolution: Identity across graphs by shared identifier (CRD, CIK, EIN, ADV fund id, individual CRD) or citation; a name match is shown as a candidate and never merged.

WESTCHESTER CAPITAL MANAGEMENT, LLC

CRD 155686

VALHALLA, NY

This is the graph view. The full profile, with its team, deals and sources, is on RIA / Wealth Management.Open the full profile →

Search this name across graphsid dfx:ria:548a8c21-0949-e85a-3c2d-bd9e399fc52e

Data as of Mar 30, 2026 (this record's last observation) from federal regulator filings. Page built Sep 19, 2026, 1:01 PM UTC and rebuilt at most every 15 minutes.

Fund

Type

Reported GAV

As of

Owners

First reported

Status

Form D file

MERRILL LYNCH INVESTMENT SOLUTIONS--WESTCHESTER MERGER ARBITRAGE UCITS FUND

Other Private Fund

$7.3M

Aug 4, 2016

Apr 1, 2013

dropped

021-162510

Owner

Title

Ownership code

Control person

Acquired

First seen

Last seen

ANGERTHAL, MICHAEL, AARON

EXECUTIVE VICE PRESIDENT

yes

10/2021

Oct 15, 2021

Mar 28, 2024

AYLWARD, GEORGE, ROBERT

CHIEF EXECUTIVE OFFICER

yes

10/2021

Oct 15, 2021

Mar 28, 2024

BEHREN, ROY, DOUGLAS

CO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER

yes

10/2021

Mar 16, 2012

Mar 28, 2024

COLOMB, CHRISTOPHER, J

CHIEF OPERATIONS OFFICER

yes

10/2021

Aug 10, 2021

Mar 28, 2024

PURKALITIS, ANDRA, CYNTHIA

EXECUTIVE VICE PRESIDENT AND CHIEF LEGAL OFFICER

yes

11/2023

Dec 7, 2023

Mar 28, 2024

SHANNON, MICHAEL, THOMAS

CO-PRESIDENT AND CO-CHIEF INVESTMENT OFFICER

yes

10/2021

Mar 16, 2012

Mar 28, 2024

SMIRL, RICHARD, WILLIAM

EXECUTIVE VICE PRESIDENT

yes

10/2021

Oct 15, 2021

Mar 28, 2024

VIRTUS INVESTMENT PARTNERS, INC.

SOLE SHAREHOLDER

yes

10/2021

Oct 15, 2021

Mar 28, 2024

VIRTUS PARTNERS, INC.

SOLE MEMBER

yes

10/2021

Oct 15, 2021

Mar 28, 2024

WU, CASAUNDRA, LEE

ASSISTANT MANAGING DIRECTOR AND CHIEF COMPLIANCE OFFICER

yes

10/2021

Aug 10, 2021

Mar 28, 2024

Related person

Type

Class on the graph

Its RAUM

Control

Common control

State

VIRTUS INVESTMENT ADVISERS, INC.

n/a

Asset manager

$52B

yes

n/a

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT, LLC

n/a

Mixed wealth

$39B

yes

n/a

VIRTUS FIXED INCOME ADVISERS, LLC

n/a

Other adviser

$35B

yes

n/a

SUSTAINABLE GROWTH ADVISERS, LP

n/a

Asset manager

$17B

yes

n/a

DUFF & PHELPS INVESTMENT MANAGEMENT CO.

n/a

Asset manager

$13B

yes

n/a

CEREDEX VALUE ADVISORS LLC

n/a

Other adviser

$3.4B

yes

n/a

ALPHASIMPLEX GROUP, LLC

n/a

Asset manager

$3.1B

yes

n/a

SILVANT CAPITAL MANAGEMENT LLC

n/a

Asset manager

$3.0B

yes

n/a

NFJ INVESTMENT GROUP, LLC

n/a

Asset manager

$3.0B

yes

n/a

VIRTUS FUND ADVISERS, LLC

n/a

Other adviser

$1.5B

yes

n/a

VIRTUS ETF ADVISERS LLC

n/a

Other adviser

$1.4B

yes

n/a

VIRTUS ALTERNATIVE INVESTMENT ADVISERS, INC.

n/a

Asset manager

$1.1B

yes

n/a

SEIX CLO MANAGEMENT LLC

n/a

Asset manager

$336M

yes

n/a

WESTCHESTER CAPITAL PARTNERS, LLC

n/a

Asset manager

$34.2M

yes

n/a

SEIX CLO MANAGEMENT GP LLC

n/a

yes

n/a

VIRTUS GLOBAL PARTNERS PTE. LTD.

n/a

yes

n/a

VIRTUS INTERNATIONAL FUND MANAGEMENT LIMITED

n/a

yes

n/a

VIRTUS INTERNATIONAL MANAGEMENT LLP

n/a

yes

n/a

VP DISTRIBUTORS LLC

n/a

yes

n/a

Fiscal year

Filed

RAUM

Discretionary

Employees

Advisory staff

Offices

Private funds

Fund GAV

2025

Mar 30, 2026

$2.9B

n/a

2024

Mar 28, 2025

$2.8B

n/a

2023

Mar 28, 2024

$4.0B

n/a

2022

Mar 30, 2023

$5.3B

n/a

2021

Mar 31, 2022

$5.3B

n/a

2020

Mar 31, 2021

$4.7B

n/a

2019

Mar 27, 2020

$4.2B

n/a

2018

Mar 29, 2019

$4.0B

n/a

2017

Mar 30, 2018

$2.8B

n/a

2016

Mar 28, 2017

$3.8B

n/a

2015

Mar 24, 2016

$5.4B

n/a

$7.3M

2014

Mar 31, 2015

$5.7B

n/a

$13.8M

2013

Mar 31, 2014

$5.4B

n/a

$13.7M

2012

Apr 1, 2013

$4.7B

n/a

$21.2M

2011

Mar 16, 2012

$5.2B

n/a

Latest fiscal year

RAUM

A year earlier

1y change

Three years earlier

3y CAGR

Employees

A year earlier

Offices

A year earlier

2025

$2.9B

$2.8B

2.5%

$5.3B

-18.6%