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

Prossimo Advisors LLC

San Luis Obispo, CAMulti-family officeidentity confidence 90%prossimoadvisors.com

Why this class: Prossimo Advisors' own site calls it a multi-family office serving high net-worth individuals and families..

Verified Sep 13, 2026 (4 days ago)
Last observed Sep 14, 2026 · 84 observations · 5 sources
3 people · 0 investments · 24 public positions · 25 events
Identity
90
high
Data depth
65
high
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
55
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 59% (high value, high value deep; the most valuable missing fact is direct investments)
identityclassificationwealth origincapital-scale evidencepeoplecontactsmandatedirect investmentsfund relationshipsco-investorssponsor relationshipsreal estatepublic holdingsrecent eventsprovenancefreshness
Classification
Multi-family office
Description
Prossimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions to the complex financial and personal circumstances that surround high net-worth individuals and families. We exist to plan, implement, and oversee each client’s tailored investment and planning objectives.
Headquarters
San Luis Obispo, CA
Office address
1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401
Business phone
805-548-2800
Website
prossimoadvisors.com
Year established
unknown
Assets under management
unknown
Capital scale
Reported office AUM: unknown. 13F disclosed value $16.4M. Regulatory AUM $239M. These are different facts and are never added together.
Regulatory AUM (Form ADV)
$239M as of Mar 26, 2026, the adviser's regulatory assets, not the family's wealthFact
SEC registration
RIA since May 11, 2020 · 4 employeesFact
Client mix (Form ADV 5.D)
Individuals: n/a ($1.3M); Corporations: n/a ($17.2M); Pension plans: n/a ($3.9M); Charitable organizations: n/a ($14.3M); High net worth individuals: 26 ($202M)Fact
Form 13F
$16.4M across 24 positions, quarter ended Mar 31, 2026. Long 13(f) securities only; never the whole portfolio.Fact
Classification history
  • Sep 13, 2026Multi-family office 90%Prossimo Advisors' own site calls it a multi-family office serving high net-worth individuals and families.Factverifiedprossimoadvisors.comProssimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions
  • Sep 12, 2026Multi-family office 80%the office describes itself as a multi family office (cited)Fact
  • Sep 12, 2026Outsourced family office provider 60%registered adviser offering family office services among its advisory services ('family office services')Inference
Family and wealth origin
Family served
unknown
Source of wealth
unknown
Operating company origin
unknown

Not on the record yet. Family and wealth-origin claims are written only from cited public sources.

Team
PersonTitleResponsibilityBusiness contactSource
Jerry Todd MirollaManaging DirectorLeadershipnone on recordreports.adviserinfo.sec.gov Fact
Ashleigh SwayzeCounselOperations and finance
phone: 646-395-3900 (published by the subject, Mar 13, 2026)
phone: 6463953900 (published by the subject, Apr 21, 2026)
sec.gov Fact
Katelyn Blaire HunterChief Compliance OfficerOperations and finance
email: khunter@prossimoadvisors.com (published by the subject)
reports.adviserinfo.sec.gov Fact
Office contact points
Business phone: 805-548-2800 (published by the subject) adviserinfo.sec.gov
Office address: 1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401 (published by the subject) sec.gov
Website: prossimoadvisors.com (published by the subject) prossimoadvisors.com
Investment mandate

inferred only: public equity book 16441546.0

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)
Public equity book
$16.4M Inference
13F table value, quarter ended 2026-03-31; long 13(f) securities only
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

Top 24 positions of 24 for the quarter ended Mar 31, 2026; $16.4M shown of $16.4M reported. Long 13(f) securities only. Never presented as the whole portfolio.

IssuerClassValueSharesWeight
VANGUARD INDEX FDSS&P 500 ETF SHS$3.1M5,25519.1%
BERKSHIRE HATHAWAY INC DELCL B NEW$2.0M4,25412.4%
ISHARES TRIBOXX HI YD ETF$1.1M13,1996.4%
NVIDIA CORPORATIONCOM$1.0M5,7606.1%
INNOVATOR ETFS TRUSTUS EQTY PWR BUF$990,78421,5546.0%
MICROSOFT CORPCOM$836,9322,2615.1%
ISHARES TRISHS 5-10YR INVT$736,83113,8454.5%
SCHWAB STRATEGIC TRUS TIPS ETF$612,03023,0003.7%
ISHARES TRULTRA SHORT DUR$573,47411,3293.5%
J P MORGAN EXCHANGE TRADED FULTRA SHRT ETF$569,26111,2483.5%
ISHARES TRCORE S&P500 ETF$558,4958553.4%
CINTAS CORPCOM$542,9393,2103.3%
APPLE INCCOM$501,4891,9763.1%
LPL FINL HLDGS INCCOM$391,0791,3002.4%
JACOBS SOLUTIONS INCCOM$381,8403,0002.3%
ISHARES INCMSCI EURZONE ETF$366,8205,8562.2%
ALPHABET INCCAP STK CL A$328,1061,1412.0%
JPMORGAN CHASE & COCOM$316,8101,0771.9%
AMAZON COM INCCOM$297,8261,4301.8%
BROADCOM INCCOM$267,4178641.6%
JOHNSON & JOHNSONCOM$257,6401,0541.6%
AB ACTIVE ETFS INCINTL LOW VOLATLT$242,4795,6841.5%
BANK AMERICA CORPCOM$225,9564,6351.4%
AB ACTIVE ETFS INCEMERGING MKTS OP$209,8984,7901.3%
Changes between the last two quarters
  • Mar 31, 2026 Prossimo Advisors, LLC opened a $2,038,517 position in Berkshire Hathaway Inc Del (4,254 shares) sec.gov
  • Mar 31, 2026 Prossimo Advisors, LLC opened a $3,140,267 position in Vanguard Index Fds (5,255 shares) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Amazon Com Inc 24,633 -> 2,961 shares ($5,404,000 -> $650,147) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Apple Inc 32,484 -> 2,757 shares ($6,664,000 -> $702,015) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Home Depot Inc 6,643 -> 718 shares ($2,435,000 -> $290,926) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Jpmorgan Chase & Co. 8,831 -> 1,049 shares ($2,561,000 -> $330,886) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC exited Cintas Corp (was $2,100,000, 9,423 shares) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC exited Costco Whsl Corp New (was $3,776,000, 3,814 shares) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC exited Mastercard Incorporated (was $2,038,000, 3,627 shares) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC exited Walmart Inc (was $2,057,000, 21,038 shares) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Microsoft Corp 19,904 -> 1,981 shares ($9,901,000 -> $1,026,059) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Visa Inc 18,437 -> 1,068 shares ($6,546,000 -> $364,594) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Nvidia Corporation 40,092 -> 8,609 shares ($6,334,000 -> $1,606,267) sec.gov
  • Sep 30, 2025 Prossimo Advisors, LLC reduced Alphabet Inc 29,683 -> 1,586 shares ($5,231,000 -> $385,557) sec.gov
  • Jun 30, 2025 Prossimo Advisors, LLC reduced Cintas Corp 14,904 -> 9,423 shares ($3,063,000 -> $2,100,000) sec.gov
  • Jun 30, 2025 Prossimo Advisors, LLC reduced Vanguard Index Fds 12,393 -> 5,263 shares ($2,309,000 -> $1,026,000) sec.gov
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.

  • Sep 13, 2026Classification changedProssimo Advisors LLC: CONFIRMED_MFO -> CONFIRMED_MFO (Prossimo Advisors' own site calls it a multi-family office serving high net-worth individuals and families.)ClassificationFactprossimoadvisors.com
  • Sep 11, 2026Classification changedProssimo Advisors LLC: OUTSOURCED_FAMILY_OFFICE -> CONFIRMED_MFO (the office describes itself as a multi family office (cited))ClassificationFactno URL
  • Sep 11, 2026Office discoveredProssimo Advisors LLC found on the SEC adviser roster (services_description)DiscoveryInferenceadviserinfo.sec.gov
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. 84 shown.

Score components
Freshness
+100 days since the newest source-dated fact or analyst verification (3 days)
Contactability
+15 named decision-makers (Jerry Todd Mirolla (Managing Director))
+10 verified business emails (1)
+20 verified business phones (3)
+10 office address
Data confidence
+10 website
+10 description
+10 people
+5 public holdings
+10 regulatory record
+20 independent sources (5 sources)
Active deployment
no components; scored 0
Exists confidence
+50 regulatory identifier (CIK, CRD or EIN)
+20 website
+30 independent sources (5 sources)
+30 analyst-verified
Research priority
+12 capital scale (largest of 13F, RAUM, AUM, foundation assets) ($238,503,090)
+8 multi-family office
+0 rank (719)
Mandate confidence
no components; scored 0
Identity confidence
+90 classification (CONFIRMED_MFO (Prossimo Advisors' own site calls it a multi-family office serving high net-worth individuals and families.))
Real estate propensity
no components; scored 0
Co investment propensity
no components; scored 0
Family identity confidence
no components; scored 0
Private markets propensity
no components; scored 0
Current activity confidence
+25 filed a 13F for a recent quarter (the entity operates; not deployment)
+25 a source-dated fact within 12 months (3 days)
External manager propensity
no components; scored 0
Direct investment propensity
no components; scored 0
Independent sponsor propensity
no components; scored 0
FactValueEffectiveSourceClass
Form ADV firm typeRIAMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Form ADV admission signalservices_descriptionMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Latest Form ADV filing2026-03-26Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Other names (Form ADV 1.B)Prossimo Advisors LLCSep 11, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Other services (Form ADV)FAMILY OFFICE SERVICESMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Advisory services (Form ADV 5.G)portfolio_management_individuals,selection_of_other_advisers,otherMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Form ADV statusApprovedMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
SEC status effective2020-05-11Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Bios readbio-fo-1Sep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Branch offices1Sep 11, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Business phone805-548-2800Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
High net worth clients26Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Client mix (Form ADV 5.D){"individuals":{"clients":null,"raum_usd":1282849,"fewer_than_5":false},"corporations":{"clients":null,"raum_usd":17197163,"fewer_than_5":false},"pension_plans"Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
DescriptionProssimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions to the complex financial and personal circumstances that surround high net-worth individuals and families. We exist to plan, implement, and oversee each client’s tailored investment and planning objectives.Sep 14, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
DescriptionProssimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions to the complex financial and personal circumstances that surround high net-worth individuals and families. We exist to plan, implement, and oversee each client’s tailored investment and planning objectives.Sep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
DescriptionProssimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions to the complex financial and personal circumstances that surround high net-worth individuals and families. We exist to plan, implement, and oversee each client’s tailored investment and planning objectives.Sep 11, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Edgar entity typeotherSep 12, 2026SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Edgar forms13F-HR,N-PXSep 12, 2026SEC EDGAR entity submissions record (filer profile: forms filed, SIC, entity type, website) sec.govFact
Employees4Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Filing address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F filerYDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Other managers on 13F0Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2026-03-31Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-12-31Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-09-30Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-06-30Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2025-03-31Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Latest 13F quarter2024-12-31Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions24Mar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions36Dec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions31Sep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions144Jun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions134Mar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F positions135Dec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$16.4MMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$15.5MDec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$13.6MSep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$125MJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$133MMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
13F table value$138MDec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CAMar 31, 2026SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CAMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
HeadquartersSan Luis Obispo, CADec 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CASep 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CAJun 30, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CAMar 31, 2025SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
HeadquartersSan Luis Obispo, CADec 31, 2024SEC Form 13F data sets (quarterly holdings, all filers) sec.govFact
Legal formLimited Liability CompanyMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Office address1150 OSOS STREET, SUITE 208, San Luis Obispo, CA, 93401Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Office type (stated)multi_family_officeSep 14, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Office type (stated)multi_family_office
Prossimo Advisors, LLC is a multi-family office that provides individualized, objective, and proactive solutions
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) prossimoadvisors.comFact
Office type (stated)multi_family_officeSep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Office type (stated)multi_family_officeSep 11, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Private funds advised0Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Private fund gross assets$0Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Accounts (Form ADV)101Mar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
HNW client assets (Form ADV)$202MMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Regulatory AUM (Form ADV)$239MMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Schedule a rows2Sep 11, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) reports.adviserinfo.sec.govFact
Team page urlhttps://www.prossimoadvisors.com/our-teamSep 14, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Team page urlhttps://www.prossimoadvisors.com/our-teamSep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Team page urlhttps://www.prossimoadvisors.com/our-teamSep 11, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Websiteprossimoadvisors.com
office website prossimoadvisors.com
Sep 13, 2026DFX analyst research (General-assisted, every claim URL-cited) prossimoadvisors.comFact
Websiteprossimoadvisors.comMar 26, 2026SEC Form ADV monthly roster (RIA + exempt reporting advisers) adviserinfo.sec.govFact
Website readsite-fo-3Sep 14, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Website readsite-fo-3Sep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Website titleProssimo AdvisorsSep 14, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Website titleProssimo AdvisorsSep 12, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact
Website titleProssimo AdvisorsSep 11, 2026Family office and investment company websites (about, team, portfolio, news pages) prossimoadvisors.comFact