SourcingSourcing

SEMPOLINSKI, WILLIAM JOHN

B51
CRD 338120·SEC 801-134388·EASTON, MA
AUM
$292.0M
$100M-$500M
Est. Revenue
$2.9M
@ 1% on AUM
Est. EBITDA
$876K
@ 30% margin
Est. Deal Value
$7.0M
@ 8× EBITDA

Identity

Registrations & legal identity

Legal name
SEMPOLINSKI, WILLIAM JOHN
CRD
338120
SEC file #
801-134388
EIN
—
DBA names
Five Corners Financial Services

Economics

AUM
$292.0M
AUM band
$100M-$500M
AUM trajectory
—
Client mix
Individuals Other195
Individuals High Net Worth95

Operations

Employees (total)
3
Advisory staff (per ADV)
2
Advisory staff (5-yr trend)
'25'26
2 advisors → 2 advisors▬ 0%
Primary office
EASTON MA
Branches
—

Custodian & Brokerage

Primary custodian
Charles Schwablow confidence
Services offered
Financial planningPortfolio mgmt — individuals
Fee basis
% of AUMFixed fees

Filings

Latest ADV filing
01/20/2026
ADV-W filed at
—
Website
5cornersfinancial.com

Compliance

Disclosures (firm)
0
Trademark
—
Additional signalsExpand ▾

Ownership & succession ★

Who controls the firm + pre-computed succession flags

Top Owner Name
SEMPOLINSKI, WILLIAM, JOHN
Top Owner Pct
87.5
Top Owner Entity Kind
I
Owner Count
1
Control Persons
SEMPOLINSKI, WILLIAM, JOHN
Solo Advisor Indicator
No
Succession Risk Solo Owner
Yes
Is Parent Owned Subsidiary
No

Availability / M&A ★

Already-acquired = skip; deal comps

Adv W Filed
No

Web presence ★

Stale website = winding down

Web Signal Quality
ok
Rdap Domain
5CORNERSFINANCIAL.COM
Rdap Domain Creation Date
2025-07-30T19:16:52Z
Rdap Firm Age Years
1
Rdap Firm Age Band
<5y
Rdap Registrar
GoDaddy.com, LLC

Retirement-plan book (Form 5500) ★

401(k)/plan business — cross-sell value

Retirement Plan Book
No

SEC EDGAR

Edgar Registered
No

Local market & wealth

Rank targets by how wealthy the local market is

Soi High Wealth Score
0.3522
Soi Zip Pct 200k Plus
0.1254
Soi Zip Returns 200k Plus
730
Soi Zip Total AGI
653,298
Fdic Zip Total Deposits
5,836,451,000
Fdic Zip Branch Count
157
Fdic Zip Top Banks
North Easton Savings Bank
Bank of Easton

Compliance & brand

Firm Registration Status
active

All other collected signals (24)

Everything else we've pulled for this record, not yet curated into a section.

Adv W Recently Filed
No
Bc Firm Active Bc Count
0
Bc Firm Active IA Count
2
Bc Firm IAR Count
2
Custodian Candidates
Full
Charles Schwab6
E*trade4
Fdic Zip Branches Raw
BayBankEaston, MA
North Easton Savings BankSouth Easton, MA
Fdic Zip HHI
5701.15
Fdic Zip Top Bank Share Pct
74.29
Fdic Zip Year
2025
Firm Has Custody
Yes
Mailing Office Differs
No
Rdap Domain Expiration Date
2035-07-30T19:16:52Z
Rdap Domain Last Changed
2025-11-11T15:40:08Z
Rdap Nameservers
Ns59.domaincontrol.comNs60.domaincontrol.com
Rdap Secure Dns Enabled
Yes
Rdap Status
Client Delete ProhibitedClient Renew ProhibitedClient Transfer ProhibitedClient Update Prohibited
Soi Year
2022
Soi Zip Distribution
Stub 1
AGI13,443
Returns1,290
Stub 2
AGI34,004
Returns900
Stub 3
AGI53,410
Returns860
Soi Zip Total Business Income
14,940
Soi Zip Total Cap Gains
33,428
Soi Zip Total Dividends
10,658
Soi Zip Total Returns
5,820
Top Owner CRD
2366256
Trust Company Affiliate
No

People (2)

2
SEMPOLINSKI, WILLIAM, JOHN
IAR · Direct Owner · 87.5%
2366256
JOHN LAVASSEUR
IAR
7485530