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Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 5:07 AM ET

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Robert Underbrink

Named as an officer, director or promoter on SEC Form D filings · FL · Oct 7, 2022 → Oct 7, 2022

2deals (issuers)
$236.4Mreported sold
19investors
2Form D filings
2022year on file

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:53 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Robert Underbrink is listed as an executive officer on 2 SEC Form D filings by 2 issuers in Oct 2022: Tarpon Blue Silver King I, LLC (Naples, FL — commercial — 2022; $235M reported sold to 10 investors) and Tarpon Blue Silver King II, LLC (Naples, FL — commercial — 2022; $1.4M reported sold to 9 investors).

What this means 2 separate companies raised money with this person listed as executive officer. Across those companies the filings report $236.4M sold in total.

Listed alongside Arnold Sarlo (2 shared filings), Brett DuBois (2 shared filings), Christian Spilker (2 shared filings) and Kenneth Smith (2 shared filings).

What this means These are the other officers, directors or promoters the companies named on the same forms — the team around Robert. Each name links to their own page.

All 2 issuers belong to the sponsor group Tarpon Blue (2 issuers, $236.4M reported sold, 2022).

What this means A sponsor group is one team that sets up a new company for each deal. Tarpon Blue has 2 companies on file and $236.4M reported sold in total — the group page shows the whole track record in one place.

Public records searched: federal courts (CourtListener / RECAP), SEC enforcement releases, state securities regulators (AZ, CA, DE, TX, WA) — 4 court cases matching the name listed in Key records below.

What this means 4 records came back. Each one is listed below with a link to the original document and a line saying why it matched. A name match is not proof it is the same person or company — read the why line and the document. Being sued or named in a release is an accusation, not a finding.

What the community is saying

Community search for Robert Underbrink has not run yet — it is joining a line of 7,298 names; searches run around the clock at the hosts' allowed rate. Searched so far: 27 names.

Community comments are quoted as written by their authors. Sources searched: BiggerPockets forums (via DuckDuckGo, Brave, Bing and BiggerPockets search) and Reddit (search feed + public archive).

Key records

Five things investors ask first. Items still in human review are counted, not shown.

1. Lawsuits

4 cases: 3 closed (disposition not in docket feed), 1 dismissed

Underbrink v. Equinor Texas Onshore Properties LLC <b><font color="red">Do not docket in this case. Case is consolidated under lead case number 4:20cv497.</font></b> closed
District Court, S.D. Texas · No. 4:20-cv-00837 · Filed Mar 6, 2020 · Closed Mar 29, 2020 · Nature of suit: 190 Other contract actions
Role of Underbrink: Plaintiff · Outcome: Terminated 2020-03-29 — FJC Integrated Database disposition: Statistical closing Docket on CourtListener ↗
same rare surname (1 person in Form D filings, 4 federal dockets); surname only in the caption; court in TX (not a filing state)
Underbrink v. Talisman Energy USA, Inc. <b><font color="red">Do not docket in this case. Case is consolidated under 4:16CV2960.</font></b> closed
District Court, S.D. Texas · No. 4:17-cv-00575 · Filed Feb 22, 2017 · Closed Jun 23, 2017 · Nature of suit: 190 Other contract actions
Role of Underbrink: Plaintiff · Outcome: Terminated 2017-06-23 — FJC Integrated Database disposition: Statistical closing Docket on CourtListener ↗
same rare surname (1 person in Form D filings, 4 federal dockets); surname only in the caption; court in TX (not a filing state)
Underbrink v. Janssen Research & Development LLC closed
District Court, E.D. Louisiana · No. 2:15-cv-04722 · Filed Sep 24, 2015 · Closed Aug 23, 2021 · Nature of suit: 367 Health care / pharm
Role of Underbrink: Plaintiff · Outcome: Terminated 2021-08-23 (disposition not included in the bulk docket feed — see docket) Docket on CourtListener ↗
same rare surname (1 person in Form D filings, 4 federal dockets); surname only in the caption; court in LA (not a filing state)
Underbrink v. Plaza Home Mortgage dismissed
District Court, D. Minnesota · No. 4:94-cv-00091 · Filed Jan 28, 1994 · Closed May 4, 1994 · Nature of suit: 160 Stockholder's suits
Role of Underbrink: Plaintiff · Outcome: Terminated 1994-05-04 — FJC Integrated Database disposition: Dismissed: settled Docket on CourtListener ↗
same rare surname (1 person in Form D filings, 4 federal dockets); surname only in the caption; court in MN (not a filing state)
What was searched

Sources searched: CourtListener bulk data (RECAP dockets as of 2026-09-30; recall-first rule 10-24) — federal district + bankruptcy courts State courts: not covered (one-tap state court links under Look further). PACER: not searched. · Last checked Oct 24, 2026, 2:53 AM ET.

Court records show docket facts only; we never restate allegations as facts. Outcome wording comes from the docket feed; where it does not state a disposition we say so.

State courts: not covered (one-tap state court links under Look further). No state offers a lawful automated statewide source PartnerFacts can use today. Texas (re:SearchTX) terms prohibit storing results in a database open to third parties; New York (WebCivil) and Massachusetts (MassCourts) require a browser check that blocks scripted queries; California has no statewide index (58 county portals; Rule of Court 2.503 grants name-based access case by case); Florida, Utah and Illinois offer paid or partial access whose terms for automated use are unverified. Washington (dw.courts.wa.gov; bulk index reports under a JISC data-dissemination agreement), Delaware (CourtConnect; Court of Chancery not included) and Arizona (apps.azcourts.gov/publicaccess, which has an official channel to request high-volume access) are the candidates; PartnerFacts will request written permission before any automated search. Federal courts are searched through CourtListener / RECAP.

2. Regulatory actions

None found in sources searched — SEC enforcement releases (index scan as of Oct 24, 2026, 2:50 AM ET) · state securities regulators: AZ, CA, DE, TX, WA (crawled Oct 23, 2026)

What was searched

SEC enforcement searched: SEC litigation releases and administrative proceedings — respondent names in the sec.gov index titles (30,205 releases, 1995-09-19 to 2026-10-23); release text is read only to confirm a candidate. Names that appear only in the body of a release are not found. — Searched SEC litigation releases and administrative proceedings (1995→ / 2007→) (30,205 records as of Oct 24, 2026, 2:50 AM ET) — nothing matched Robert Underbrink..

State securities regulators searched: AZ (Corporation Commission Securities Division), CA (DFPI — 16 of 12,159 DFPI respondent pages read so far; sponsor-name matches are read first), DE (DOJ Investor Protection Unit), TX (State Securities Board), WA (DFI) — last crawled Oct 23, 2026, 9:57 PM ET. Other states are not covered.

3. Bankruptcies

None found in sources searched — federal bankruptcy courts (CourtListener / RECAP), checked Oct 24, 2026

What was searched

Sources searched: Federal bankruptcy courts via CourtListener / RECAP archive (federal district courts, federal bankruptcy courts). State courts: not covered (one-tap state court links under Look further). PACER: not searched (RECAP only). · Last checked Oct 24, 2026, 2:53 AM ET.

State courts: not covered (one-tap state court links under Look further). No state offers a lawful automated statewide source PartnerFacts can use today. Texas (re:SearchTX) terms prohibit storing results in a database open to third parties; New York (WebCivil) and Massachusetts (MassCourts) require a browser check that blocks scripted queries; California has no statewide index (58 county portals; Rule of Court 2.503 grants name-based access case by case); Florida, Utah and Illinois offer paid or partial access whose terms for automated use are unverified. Washington (dw.courts.wa.gov; bulk index reports under a JISC data-dissemination agreement), Delaware (CourtConnect; Court of Chancery not included) and Arizona (apps.azcourts.gov/publicaccess, which has an official channel to request high-volume access) are the candidates; PartnerFacts will request written permission before any automated search. Federal courts are searched through CourtListener / RECAP.

4. Differences between public sources

Comparisons cover issuers and sponsor groups — see the issuer pages under Deals

No differences found between the public filings we have for Robert Underbrink (compared 2 filings on Oct 24, 2026).

What is compared

What is compared: every Form D and D/A we hold for this subject, side by side — filing dates vs. first-sale dates (the 15-day rule), amendment timing on open offerings (the yearly-amendment expectation), amounts sold, investor counts, offering amounts and minimums across amendments, industry and size bands, addresses, how each person's name and role is written, paid sellers' CRD numbers, and (for groups) where the member companies were formed and sit. Everything is as filed by the issuer; the SEC does not check it. Differences are common and usually have ordinary explanations — we show both values, the dates, and the source so you can ask. As of Oct 24, 2026.

5. Money to insiders

None reported on 2 offerings — no sales commissions, finder's fees or proceeds to insiders

Per-offering detail
Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Oct 7, 2022 D
Tarpon Blue Silver King I, LLC
File 021-461172
$0 (est.)$0 (est.)$0 (est.)None listed on this filingEDGAR ↗
Oct 7, 2022 D
Tarpon Blue Silver King II, LLC
File 021-461174
$0 (est.)$0 (est.)$0 (est.)None listed on this filingEDGAR ↗

Counts come from Form D Items 12–15 on the filings in our index (latest filing per offering; one offering = one SEC file number; an amendment updates its offering rather than adding one). "To insiders" = gross proceeds used for payments to executive officers, directors or promoters. "—" = not reported on that filing. Amounts marked (est.) were reported as estimates. "Paid to sell it" = sales compensation recipients named on that filing (Item 12), each linked to FINRA BrokerCheck when a CRD number is reported.

Counted across every filing this person is listed on (latest filing per offering, per issuer).

Deals 2

Every issuer that named Robert Underbrink on a Form D, newest first. A Form D is the notice a company files after it starts selling a private investment.

Commercial · group: Tarpon Blue

Tarpon Blue Silver King II, LLC

Naples, FL · Oct 7, 2022
  • Oct 7, 2022 · D · $1,399,396 sold of $1,399,396 · 9 investors · min. No minimum reported · role: Executive Officer (Vice President of Tarpon Blue Silver King Management, LLC, a Delaware limited liability company, the Administrative Member of Tarpon Blue Silver King II, LLC) EDGAR ↗

Raised $1.4M from 9 investors (100% of the $1.4M target) as of the latest filing. Robert is listed as executive officer.

Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Commercial / 506(b) (6,713 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

Commercial · group: Tarpon Blue

Tarpon Blue Silver King I, LLC

Naples, FL · Oct 7, 2022
  • Oct 7, 2022 · D · $235,000,604 sold of $235,000,604 · 10 investors · min. No minimum reported · role: Executive Officer (Vice President of Tarpon Blue Silver King Management, LLC, a Delaware limited liability company, the Administrative Member of Tarpon Blue Silver King I, LLC) EDGAR ↗

Raised $235M from 10 investors (100% of the $235M target) as of the latest filing. Robert is listed as executive officer.

Sources

Every row is a Form D or D/A on which the issuer listed this name as a related person. Amount sold and investors are the maximum reported on any filing for this issuer. "Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Commercial / 506(b) (6,713 filings); ranges are the middle half (25th–75th percentile). Computed by PartnerFacts from SEC EDGAR Form D data as of Oct 23, 2026, 5:45 PM ET. Rows without a range: fewer than 30 comparable filings, or not a Rule 506 offering. No ranking or score.

People around Robert 4

Officers, directors, promoters and management entities named on the same filings, as of Oct 23, 2026, 5:45 PM ET.

KS
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Person

Kenneth Smith

Executive Officer · 2 shared filings (2 issuers) · also on 1 other issuer

Listed on the same filings as Robert Underbrink. Their page shows their other deals.

AS
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Person

Arnold Sarlo

Executive Officer · 2 shared filings (2 issuers)

Listed on the same filings as Robert Underbrink. Their page shows their other deals.

BD
No photo found yet (own website and image search run after this page is viewed)
Person

Brett DuBois

Executive Officer · 2 shared filings (2 issuers)

Listed on the same filings as Robert Underbrink. Their page shows their other deals.

CS
No photo found yet (own website and image search run after this page is viewed)
Person

Christian Spilker

Executive Officer · 2 shared filings (2 issuers)

Listed on the same filings as Robert Underbrink. Their page shows their other deals.

The team behind the deals

Sponsor group

Tarpon Blue

2 issuers · 2 filings · $236.4M reported sold · 2022–2022

One team, 2 deal companies. Robert Underbrink is listed on 2 of them.

Sources

Issuers are grouped when their Form D filings share related persons, a management entity or a business address (automatic match from the filings). "Listed" marks the issuers that name Robert Underbrink.

Same business address

22 other issuers file from the same address

A shared address can mean the same team, a shared office building or a registered agent. It is a lead, not a conclusion.

Registrations and other filings

Adviser registration (Form ADV)

None of the 2 issuers this person is listed on appears in Form ADV (searched 24,962 advisers as of Oct 2, 2026). A person is never an adviser firm; Form ADV is checked for the issuers and the management companies they are listed with.

Other offering types (Regulation A and Regulation Crowdfunding)

Searched SEC Regulation A Data Sets (Forms 1-A, 1-K, 1-Z; 2015 Q2 → 2026 Q3); SEC Crowdfunding Offerings Data Sets (Form C family; 2016 Q2 → 2026 Q3); EDGAR form index for 2026 Q3 → 2026 Q4 (51,358 records as of Oct 23, 2026, 8:41 PM ET) — nothing matched this name.

Property records none — individuals are not matched

Property records are matched to companies only, never to individuals, so none are matched to Robert Underbrink by design. Searched property records in Hillsborough County FL (Clerk recorded-document index Oct 14, 2026 to Oct 15, 2026 + FL DOR 2026 ownership roll), Miami-Dade County FL (FL DOR 2026 ownership roll), Harris County TX (HCAD 2026 ownership roll), Dallas County TX (DCAD 2026 ownership roll), New York City ACRIS documents and PLUTO ownership rows already retrieved for other issuers, Cook County IL sale and ownership rows already retrieved for other issuers (814,874 records as of Oct 23, 2026, 8:59 PM ET) for the 2 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Robert Underbrink is listed on: none on file. No website or social profile named in Tarpon Blue Silver King I, LLC's SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #143,854 of 374,652 in line (14 issuers searched so far). One-tap searches: Look further ↓

Look further

One-tap searches on sites we do not index ourselves, with the name pre-filled (Naples, FL). Each opens in a new tab; what you find there is not verified by PartnerFacts.

Change history

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