A continuously maintained graph of U.S. family offices: identity, team, observed investments, public holdings, relationships and dated signals of change. Facts, inferences and estimates are labelled as such, with the source and the date, on every row. Unknown is printed as unknown.

Family office profile

D••• M••••••••• L••

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Chester Springs, PASingle family office (confirmed)identity confidence 75%d•••••••••

Why this class: D••• Management's own w••••••, independent of our_source_url, self-describes as the 'Investment Arm of Family Office' and names M••• D••• as Managing Partner, matching our_sentence's d••••••••• of a family office fund..

Verified Sep 15, 2026 (3 days ago)
Last observed Sep 16, 2026 · 15 observations · 3 sources
2 people · 0 investments · 0 public positions · 3 events
Identity
75
high
Data depth
45
elevated
Freshness
100
high
Active deployment
0
low
Direct investing
0
low
External managers
0
low
Private markets
0
low
Sponsor-friendly
0
low
Real estate
0
low
Co-investment
0
low
Contactability
50
elevated
Mandate confidence
0
low

Twelve separate dimensions, each 0 to 100 from listed components. There is no single family office score; the components are in the evidence section.

Overview
Profile completeness 38% (high value, high value shallow; the most valuable missing fact is direct investments)
identityclassificationwealth origincapital-scale evidencepeoplecontactsmandatedirect investmentsfund relationshipsco-investorssponsor relationshipsreal estatepublic holdingsrecent eventsprovenancefreshness
Classification
Single family office (confirmed)
Description
D••• M••••••••• L••
Headquarters
Chester Springs, PA
Office address
unknown
Business phone
unknown
Website
d•••••••••
Year established
unknown
Assets under management
unknown
Capital scale
Reported office AUM: unknown. No public number of any kind.
Classification history
  • Sep 15, 2026Single family office (confirmed) 75%D••• Management's own w••••••, independent of our_source_url, self-describes as the 'Investment Arm of Family Office' and names M••• D••• as Managing Partner, matching our_sentence's d••••••••• of a family office fund.Factverifiedducemanagement.com“Investment Arm of Family Office D••• M••••••••• L•• M••• D•••, Managing Partner”
  • Sep 14, 2026Single family office (probable) 70%a filing by a third party describes it as a single family office (cited)Fact
  • Sep 14, 2026Candidate 25%no rule matched; held as a candidate pending researchInference
Family and wealth origin
Family served
D••• family
Source of wealth
unknown
Operating company origin
unknown
Team
PersonTitleResponsibilityBusiness contactSource
M••• D•••Managing PartnerLeadership · investment decisions
email: marcduey@ducemanagement.com (published by the subject)
sec.gov Fact
M••• D•••Managing PartnerLeadership
email: marcduey@ducemanagement.com (published by the subject)
ducemanagement.com Fact
Office contact points
Website: ducemanagement.com (published by the subject) ducemanagement.com
Investment mandate
Stated (their words, cited)
No cited statement of mandate on the record.
Observed (from the investment record)
No investments on the record yet, so nothing is observed.
Inferred (regulatory shape and team)
Nothing to infer from.
Invests directly
unknown
Allocates to managers
unknown
Asset classes
unknown
Sectors
unknown
Geography
unknown
Check size
unknown
Direct investments
No substantiated direct investment on the record. Absence here is absence of evidence, not evidence of absence.
Fund and manager relationships
No fund commitment or manager relationship on the record. Commitment amounts are shown only when public.
Public stakes and holdings
Form 13F holdings
No 13F filing on the record for this office.
Real estate
No documented real estate ownership link. A property is attributed to an office only through a documented control relationship, never from a surname.
Co-investors
No co-investor on the record.
Independent sponsor relationships
No cited relationship to an independent sponsor.
Signals and timeline

Most significant first: what kind of change it is, its size, whose change it is, and how recent. 3 events. 13F position changes are under Public stakes and holdings.

  • Apr 30, 2026Office discoveredD••• M••••••••• L•• described on SEC filings as 'family office' (10-K/A, DEF 14A)DiscoveryFactsec.gov
  • Sep 15, 2026Classification changedD••• M••••••••• L••: PROBABLE_SFO -> CONFIRMED_SFO (D••• Management's own w••••••, independent of our_source_url, self-describes as the 'Investment Arm of Family Office' and names M••• D••• as Managing Partner, matching our_sentence's d••••••••• of a family office fund.)c•••••••••Factducemanagement.com
  • Sep 14, 2026Classification changedD••• M••••••••• L••: CANDIDATE_FAMILY_OFFICE -> PROBABLE_SFO (a filing by a third party describes it as a single family office (cited))c•••••••••Factno URL
Sources and evidence

Every observation behind this profile: the value, when it was effective, the source, the quote where there is one, and whether it is a fact, an inference or an estimate. 15 shown.

Score components
Freshness
+100 d••• s•••• t•• n••••• s••••••••• f••• o• a•••••• v••••••••• (1 days)
Contactability
+30 n•••• d••••••••• (M••• D••• (Managing Partner); M••• D••• (Managing Partner))
+20 v••••••• b••••••• e••••• (2)
Data confidence
+10 w••••••
+10 d•••••••••
+10 p•••••
+15 i••••••••• s•••••• (3 sources)
Active deployment
no components; scored 0
Exists confidence
+20 w••••••
+30 i••••••••• s•••••• (3 sources)
+30 a•••••••••
Research priority
+15 s••••• f••••• o• f••••• i••••••••• c••••••
+0 r••• (1394)
Mandate confidence
no components; scored 0
Identity confidence
+75 c••••••••• (CONFIRMED_SFO (D••• Management's own w••••••, independent of our_source_url, self-describes as the 'Investment Arm of Family Office' and names M••• D••• as Managing Partner, matching our_sentence's d••••••••• of a family office fund.))
Real estate propensity
no components; scored 0
Co investment propensity
no components; scored 0
Family identity confidence
+40 f••••• n•••• (D••• family)
Private markets propensity
no components; scored 0
Current activity confidence
+25 a• s••••••••• f••• w••••• 1• m••••• (1 days)
External manager propensity
no components; scored 0
Direct investment propensity
no components; scored 0
Independent sponsor propensity
no components; scored 0
FactValueEffectiveSourceClass
DescriptionD••• M••••••••• L••Sep 16, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
DescriptionD••• M••••••••• L••Sep 15, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
DescriptionD••• M••••••••• L••Sep 14, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Edgar fts discoveryfamily officeApr 30, 2026SEC EDGAR full-text search (a filing sentence that says what an entity is, quoted with its URL) sec.govFact
Family servedD••• family
“Investment Arm of Family Office D••• M••••••••• L•• M••• D•••, Managing Partner”
n/aDFX analyst research (General-assisted, every claim URL-cited) ducemanagement.comFact
Office type (stated)single_family_office
“Investment Arm of Family Office D••• M••••••••• L•• M••• D•••, Managing Partner”
Sep 15, 2026DFX analyst research (General-assisted, every claim URL-cited) ducemanagement.comFact
Office type (stated)single_family_officeApr 30, 2026SEC EDGAR full-text search (a filing sentence that says what an entity is, quoted with its URL) sec.govFact
Websited•••••••••
“office w•••••• d•••••••••”
Sep 15, 2026DFX analyst research (General-assisted, every claim URL-cited) ducemanagement.comFact
Websited•••••••••Sep 14, 2026DFX model output (c••••••••• rules, scores, mandates, matches) ducemanagement.comInference
Website readsite-fo-3Sep 16, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Website readsite-fo-3Sep 15, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Website readsite-fo-3Sep 14, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Website titleD••• ManagementSep 16, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Website titleD••• ManagementSep 15, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact
Website titleD••• ManagementSep 14, 2026Family office and investment company w••••••s (about, team, portfolio, news pages) ducemanagement.comFact