PartnerFacts
Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 5:18 AM ET

Sponsor Check › Person

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

Dan Sachs

Named as an officer, director or promoter on SEC Form D filings · MN · Oct 12, 2010 → Jul 15, 2015

3deals (issuers)
$17.8Mreported sold
19investors
7Form D filings
2010–2015years on file

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

The short version

Dan Sachs is listed as an executive officer and director on 7 SEC Form D filings by 3 issuers between Oct 2010 and Jul 2015: Amphora Medical, Inc. (Maple Grove, MN — other health care — 2013–2015; $12.8M reported sold to 12 investors), Mainstay Medical, Inc. (Plymouth, MN — other health care — 2011–2014; $2.52M reported sold to 5 investors) and K Spine, Inc. (Minnetonka, MN — other health care — 2010–2011; $2.51M reported sold to 2 investors).

What this means A repeat sponsor — 3 separate companies raised money with this person listed as executive officer and director, over about 5 years. Across those companies the filings report $17.8M sold in total.

Listed alongside Antoine Papiernik (3 shared filings), Peter Crosby (3 shared filings), Dave Stassen (2 shared filings), MANUS ROGAN (2 shared filings), Nancy Ness (2 shared filings) and 9 others.

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

Public records searched: federal courts (CourtListener / RECAP), SEC enforcement releases, state securities regulators (AZ, CA, DE, TX, WA) — none found.

What this means Nothing turned up where we looked (3 sources). That does not prove there is nothing — it means none was found in those sources on that date.

We compared 7 public filings for Dan Sachs and found 10 differences, 1 worth asking the sponsor about: Form D filed 379 days after the first sale; and more below.

What this means These are differences between the sponsor's own SEC filings — both values, dates and sources are listed in Key records, section 4. Most have ordinary explanations; ask the sponsor.

What the community is saying

Community search for Dan Sachs has not run yet — it is joining a line of 12,621 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

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

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, 2:23 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.

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 Dan Sachs..

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, 2:23 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

10 differences found between the filings for Dan Sachs — 1 worth asking about (compared 7 filings on Oct 24, 2026)

Worth asking · Dec 9, 2010 – Dec 23, 2011

Form D filed 379 days after the first sale — Mainstay Medical, Inc.

The filing says the first sale was Dec 9, 2010. The Form D was filed Dec 23, 2011 — 379 days later. The rule: a Form D is generally due within 15 days after the first sale, so this one is 364 days past that.

What this means The notice went in months after money was taken in. Late notices are common and carry no penalty by themselves, but it is fair to ask the sponsor why the paperwork lagged.

Sources
Note · Jun 5, 2013 – Jul 15, 2015

Dan Sachs's role changed at Amphora Medical, Inc.: executive officer, director → director

The Jun 5, 2013 filing lists Dan Sachs as executive officer, director; the Jul 15, 2015 Form D/A lists director.

What this means Roles on Form D are self-reported by the issuer. A change can mean a real change in who runs the company, or just a different box ticked. Ask who makes decisions today.

Sources
Note · Oct 12, 2010 – Dec 22, 2011

Dan Sachs's role changed at K Spine, Inc.: executive officer, director → director

The Oct 12, 2010 filing lists Dan Sachs as executive officer, director; the Dec 22, 2011 Form D lists director.

What this means Roles on Form D are self-reported by the issuer. A change can mean a real change in who runs the company, or just a different box ticked. Ask who makes decisions today.

Sources
Note · Jun 5, 2013 – Jul 15, 2015

Offering amount changed between filings — Amphora Medical, Inc.

The Jun 5, 2013 filing says $1,250,000 offered; the Jul 15, 2015 Form D/A says $12,782,106.

What this means The target raise changed. Raising the cap is common when a deal grows; ask whether the extra money has the same terms and use.

Sources
Note · Dec 15, 2011 – Dec 22, 2011

No amendment in the last 12 months on an offering that may still be open — K Spine, Inc. (latest filing Dec 22, 2011)

The latest filing for this offering is dated Dec 22, 2011 (first sale Dec 15, 2011). It reports $2,512,398 sold of $2,709,131 offered. No later amendment is in our index as of Oct 24, 2026.

What this means SEC rules expect a yearly amendment while an offering is still going. The raise may simply have ended — a Form D does not say when it closed. Ask the sponsor whether the offering closed, when, and at what amount.

Sources
Note · Sep 27, 2010 – Oct 12, 2010

No amendment in the last 12 months on an offering that may still be open — K Spine, Inc. (latest filing Oct 12, 2010)

The latest filing for this offering is dated Oct 12, 2010 (first sale Sep 27, 2010). It reports $2,512,398 sold of $5,024,796 offered. No later amendment is in our index as of Oct 24, 2026.

What this means SEC rules expect a yearly amendment while an offering is still going. The raise may simply have ended — a Form D does not say when it closed. Ask the sponsor whether the offering closed, when, and at what amount.

Sources
Note · Aug 21, 2009 – Jan 3, 2013

Same name, different state: "Dan Sachs" (NY) is a separate record

This page covers filings where the address state is MN. A separate record, "Dan Sachs" with address state NY, is listed on 3 filings — most recently by Neuronetics, Inc. (Jan 3, 2013). Both records have filings in the same period (Oct 12, 2010 to Jan 3, 2013).

What this means Two records with one name were active at the same time. That can be one person listing different company addresses, or two different people. We keep them apart until a filing ties them together. Check both pages before you decide.

Sources
Note · Jun 5, 2013 – Jul 15, 2015

Address moved from Minneapolis, MN to Maple Grove, MN — Amphora Medical, Inc.

The people listed on the Jun 5, 2013 filing give Minneapolis, MN; on the Jul 15, 2015 filing they give Maple Grove, MN.

What this means Businesses move; this just shows the two places and dates. If you were told one city and the forms say another, ask which is current.

Sources
Note · Oct 2, 2012 – Apr 3, 2014

Address moved from Minneapolis, MN to Plymouth, MN — Mainstay Medical, Inc.

The people listed on the Oct 2, 2012 filing give Minneapolis, MN; on the Apr 3, 2014 filing they give Plymouth, MN.

What this means Businesses move; this just shows the two places and dates. If you were told one city and the forms say another, ask which is current.

Sources
Note · Jun 5, 2013 – Jul 15, 2015

Reported revenue range changed between filings — Amphora Medical, Inc.

"No Revenues" (Jun 5, 2013); then "Decline to Disclose" (Jul 15, 2015).

What this means This is the size band the issuer picks for itself on the form. A change can mean the business grew or shrank — or that it chose not to say. Ask for current numbers.

Sources
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

0 of 6 offerings report sales commissions; 0 report finder's fees; 1 reports proceeds to related persons totalling $768,000.

Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Jul 15, 2015 D/A
Amphora Medical, Inc.
File 021-197489
$0$0$768,000
A portion of the proceeds will be used to pay the salaries of the executive officers in the ordinary course of business.
None listed on this filingEDGAR ↗
Apr 3, 2014 D
Mainstay Medical, Inc.
File 021-214854
$0$0$0None listed on this filingEDGAR ↗
Oct 2, 2012 D
Mainstay Medical, Inc.
File 021-184910
$0$0$0
The funds raised will be used for general operating capital purposes, which will include payment of the salary of Peter Crosby in the ordinary course of business.
None listed on this filingEDGAR ↗
Dec 23, 2011 D
Mainstay Medical, Inc.
File 021-170633
$0$0$0
The funds raised will be used for general operating capital purposes, which will include payment of the salary of Peter Crosby in the ordinary course of business.
None listed on this filingEDGAR ↗
Dec 22, 2011 D
K Spine, Inc.
File 021-170609
$0$0$0None listed on this filingEDGAR ↗
Oct 12, 2010 D
K Spine, Inc.
File 021-148825
$0$0$0None listed on this filingEDGAR ↗
How this is counted

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 3

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

Other Health Care

Amphora Medical, Inc.

Maple Grove, MN · Jun 5, 2013 → Jul 15, 2015 · 2 filings
  • Jul 15, 2015 · D/A · $12,782,106 sold of $12,782,106 · 8 investors · min. No minimum reported · role: Director EDGAR ↗
  • Jun 5, 2013 · D · $600,000 sold of $1,250,000 · 4 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $12.8M from 12 investors (100% of the $12.8M target) as of the latest filing. Dan is listed as director, executive officer on 2 filings for this deal.

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: Other Health Care / 506(b) (4,189 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.

Other Health Care

Mainstay Medical, Inc.

Plymouth, MN · Dec 23, 2011 → Apr 3, 2014 · 3 filings
  • Apr 3, 2014 · D · $500,400 sold of $500,400 · 3 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 2, 2012 · D · $2,519,493 sold of $2,519,493 · 3 investors · min. No minimum reported · role: Director EDGAR ↗
  • Dec 23, 2011 · D · $700,000 sold of $700,000 · 5 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $2.52M from 5 investors (100% of the $500K target) as of the latest filing. Dan is listed as director on 3 filings for this deal.

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: Other Health Care / 506(b) (4,189 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.

Other Health Care

K Spine, Inc.

Minnetonka, MN · Oct 12, 2010 → Dec 22, 2011 · 2 filings
  • Dec 22, 2011 · D · $2,512,398 sold of $2,709,131 · 2 investors · min. No minimum reported · role: Director EDGAR ↗
  • Oct 12, 2010 · D · $2,512,398 sold of $5,024,796 · 2 investors · min. No minimum reported · role: Executive Officer, Director EDGAR ↗

Raised $2.51M from 2 investors (93% of the $2.71M target) as of the latest filing. Dan is listed as director, executive officer on 2 filings for this deal.

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.

Other pages with the same name (1)

Separate person records under the same name, not combined with this page. Each line says whether it shares an issuer with this record.

  • Dan Sachs — NY, 1 issuer, Aug 21, 2009 → Jan 3, 2013 · no shared issuer

People around Dan 14

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

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

Peter Crosby

Executive Officer, Director · 3 shared filings (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Antoine Papiernik

Director · 3 shared filings (1 issuer) · also on 7 other issuers

Antoine Papiernik is on 8 issuers in total — a repeat sponsor. Their page lists every one.

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

Robert Weisskoff

Director · 2 shared filings (1 issuer) · also on 17 other issuers

Robert Weisskoff is on 18 issuers in total — a repeat sponsor. Their page lists every one.

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

Dave Stassen

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

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Nancy Ness

Executive Officer · 2 shared filings (1 issuer) · also on 5 other issuers

Nancy Ness is on 6 issuers in total — a repeat sponsor. Their page lists every one.

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

MANUS ROGAN

Director · 2 shared filings (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Tom Ressemann

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

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Tim Haines

Director · 2 shared filings (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Peter Shagory

Director · 1 shared filing (1 issuer) · also on 2 other issuers

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Andrew M. Weiss

Director · 1 shared filing (1 issuer) · also on 3 other issuers

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Michael Liang

Director · 1 shared filing (1 issuer) · also on 12 other issuers

Michael Liang is on 13 issuers in total — a repeat sponsor. Their page lists every one.

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

Fred Kornahrens

Executive Officer, Director · 1 shared filing (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Frederick W. Kornahrens

Executive Officer, Director · 1 shared filing (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

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

Ross A. Longhini

Director · 1 shared filing (1 issuer)

Listed on the same filings as Dan Sachs. Their page shows their other deals.

The team behind the deals

Registrations and other filings

Adviser registration (Form ADV)

None of the 3 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 Dan Sachs 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 3 issuers this person is listed on — nothing matched.

Public profiles and social

Websites and social links of the issuers Dan Sachs is listed on: none on file. No website or social profile named in K Spine, Inc.'s SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #346,886 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 (Minnetonka, MN). Each opens in a new tab; what you find there is not verified by PartnerFacts.

Change history

No corrections have been requested for this page.

Every fact links to its public-record source. Plain-English notes next to a fact are our reading of that fact, not a rating. Request a correction · Facts policy

Request a correction

Free. Logged with status: received → under review → fixed / confirmed with source.

Add a response

If this is you or your firm, add a sourced explanation next to any fact. Reviewed before publishing.

Monitor this person

Members get an email when Dan Sachs appears on a new Form D, or when a court case or SEC action is matched to them. See plans →