PartnerFacts
Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 10:30 AM ET

Sponsor Check › Sponsor group

HS

Hapten Sciences

One sponsor team, 2 deal companies · Memphis, TN

Grouped because: 2 shared people, similar issuer names (2) (automatic match from the filings) · not the same sponsor?

2deal companies
$0reported sold
8investors
15Form D filings
2010–2021active
0new, last 12 mo
Follow this sponsor groupLook further ↓

Data last updated Oct 23, 2026, 5:45 PM ET · Latest filing in this group Aug 10, 2021 · Courts (RECAP) last checked: Oct 24, 2026, 2:16 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

Hapten Sciences is a sponsor group of 2 issuers that PartnerFacts links to one sponsor (shared people, similar issuer names; automatic match from the filings), filing 15 Form D filings between Dec 2010 and Aug 2021.

What this means One team, 2 deal companies, about 11 years of track record in SEC filings. We link the companies because the same people or address appear on their forms — tap "Request a correction" if that is wrong.

Combined reported sold: $0 to 8 investors (latest filing per issuer). Industries as reported: Biotechnology (1), Pharmaceuticals (1). Issuers are based in TN (2).

What this means $0 raised across the group, about $0 per investor. Amounts come from each company's latest Form D; they are what the sponsor reported, not audited figures.

Principal people: Gary Prosterman (2 issuers, executive officer, director, and promoter), Raymond J. Hage (2 issuers, executive officer, director, and promoter), Gary Stevenson (1 issuer, director), Joseph Zakrzewski (1 issuer, director), Stephen I. Bandak (1 issuer, director) and 1 more.

What this means The person on the most companies is usually the one running the show; their page lists every deal.

Activity: 0 new offerings in the last 12 months; latest filing Aug 10, 2021.

What this means No new raise filed in the past year.

Public records searched: federal courts (CourtListener / RECAP), SEC enforcement releases, state securities regulators (AK, AL, AR, AZ, CA, CO, CT, DC, DE, FINRA, FL, GA, HI, ID, IL, KS, KY, LA, MA, MD, ME, MI, MO, MS, MT, NASAA, NC, ND, NH, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, WA, WI, WV, WY), property records (NYC, FL, IL and TX counties) — none found.

What this means Nothing turned up where we looked (4 sources). That does not prove there is nothing — it means none was found in those sources on that date.

We compared 15 public filings for Hapten Sciences and found 13 differences, 1 worth asking the sponsor about: 32 other issuers file from the same address; 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 Hapten Sciences has not run yet — it is joining a line of 55,313 names; searches run around the clock at the hosts' allowed rate. Searched so far: 641 names.

Community comments are quoted as written by their authors. Sources searched: Bing (site:reddit.com / site:biggerpockets.com) and Reddit's own search, plus DuckDuckGo/Brave/BiggerPockets search when they are answering.

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, 2:16 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: 48 regulators (FINRA, NASAA, 37 states) — crawled Oct 24, 2026, 8:48 AM ET

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 Hapten Sciences..

State securities regulators: Securities regulators searched (64,910 actions): FINRA (38,350 actions, 1995–2026), NASAA (31 actions, 2000–2026; listing starts 1997), AK Division of Banking and Securities (273 actions, 1971–2025), AL Securities Commission (880 actions, 2001–2026), AR Securities Department (1,305 actions, 1998–2026), AZ Corporation Commission Securities Division (411 actions, 2017–2026), CA DFPI (25 actions, 2007–2024; listing starts 2002 — 16 of 12,159 DFPI respondent pages read so far; sponsor-name matches are read first), CO Division of Securities (731 actions, 2001–2026; older years from the Internet Archive (snapshot of 2026-05-02)), CT Department of Banking Securities Division (940 actions, 2006–2026; older years from the Internet Archive (snapshot of 2026-04-22)), DC DISB Securities Bureau (25 actions, 2012–2026), DE DOJ Investor Protection Unit (257 actions, 1987–2026), FL Office of Financial Regulation (49 actions, 2018–2026), GA Secretary of State Securities Division (65 actions, 2015–2026; listing starts 2012), HI DCCA Securities Enforcement Branch (26 actions, 2012–2026), ID Department of Finance Securities Bureau (663 actions, 1994–2026), IL Secretary of State Securities Department (4,122 actions, 2003–2023), KS Insurance Department Securities Division (58 actions), KY Department of Financial Institutions (342 actions, 2005–2026), LA Office of Financial Institutions Securities Division (13 actions, 2010–2025; listing starts 2008), MA Secretary of the Commonwealth Securities Division (125 actions, 2012–2025; live site blocks automated access — loaded from the Internet Archive snapshot of 2026-02-04), MD Attorney General Securities Division (1,054 actions, 2004–2026), ME Office of Securities (539 actions, 2000–2026), MI LARA Corporations, Securities & Commercial Licensing Bureau (201 actions), MO Secretary of State Securities Division (919 actions, 1998–2026), MS Secretary of State Securities Division (209 actions, 1995–2026), MT Commissioner of Securities and Insurance (597 actions, 2000–2026), NC Secretary of State Securities Division (265 actions, 2004–2024), ND Securities Department (711 actions, 1990–2026; the regulator no longer publishes this list live — loaded from the Internet Archive snapshot of 2026-01-06), NH Bureau of Securities Regulation (402 actions, 2002–2026), NM Regulation and Licensing Department Securities Division (90 actions, 2010–2025), NV Secretary of State Securities Division (118 actions, 2018–2026), NY Attorney General Investor Protection Bureau (44 actions, 2012–2026), OH Division of Securities (327 actions, 1993–2006), OK Department of Securities (2,531 actions, 1998–2026), OR Division of Financial Regulation (589 actions, 1988–2026), PA Department of Banking and Securities (1,448 actions, 2008–2024; the regulator no longer publishes this list live — loaded from the Internet Archive snapshot of 2024-08-09), RI DBR Securities Division (98 actions, 2005–2025), SC Attorney General Securities Division (540 actions, 2006–2026), SD Division of Insurance – Securities Regulation (106 actions, 2017–2026), TN Department of Commerce and Insurance Securities Division (405 actions, 1992–2026), TX State Securities Board (936 actions, 1999–2026), UT Division of Securities (772 actions, 2000–2026; older years from the Internet Archive (snapshot of 2010-05-27)), VT DFR Securities Division (137 actions, 2010–2026), WA DFI (2,039 actions, 2001–2026), WI DFI Division of Securities (1,072 actions, 1998–2026), WV Securities Commission (State Auditor) (64 actions), WY Secretary of State Compliance Division (6 actions, 2016–2024) — last crawled Oct 24, 2026, 8:48 AM ET. No machine-readable public listing today for IA, IN, MN, NE, NJ, VA (see docs/state-regulators.md).

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, 2:16 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

No comparisons published

What is compared

No public statement by this sponsor group has been collected yet, so there is nothing to compare. Sources compared: the sponsor's own website (known from the issuer's own filings — Form C issuer website, EDGAR company profile — an approved profile claim or Form ADV Item 1.I of its matched adviser) · SEC Form D · SEC Form ADV (IAPD) · Internet Archive · No website is on file for this sponsor group yet.

13 differences found between the filings for Hapten Sciences — 1 worth asking about (compared 15 filings on Oct 24, 2026)

Note · Dec 22, 2010

Last filing Dec 22, 2010 with 0% of the target sold — Hapten Sciences Development, LLC

Hapten Sciences Development, LLC (last filing Dec 22, 2010; $0 sold of $1,000,000). There is no filing in more than two years and the last one reported under half the target sold.

What this means An issuer whose last filing is more than two years old and reported under half its target sold. The raise may have closed early or quietly stopped. Ask what happened to each.

Hapten Sciences Development, LLC — PartnerFacts page ↗EDGAR filer page ↗
Sources
Worth asking · Aug 10, 2021

32 other issuers file from the same address — Hapten Sciences, Inc.

The address on file, 40 S. Main, Suite 2300, Memphis, TN, is used by 33 issuers in our index across 4 sponsor groups; 32 are outside this group. It is not on our registered-agent list, so it may be a shared office or administrator.

What this means Many unrelated companies file from this address. Often a registered agent or a fund administrator; sometimes a shared office. Ask where the team actually works.

Hapten Sciences, Inc. — PartnerFacts page ↗EDGAR filer page · Hapten Sciences, Inc. ↗
Sources
Note · May 13, 2013 – Oct 31, 2019

4 offerings have no amendment in the last 12 months and may still be open

No amendment in the last 12 months on an offering that may still be open — Hapten Sciences, Inc. (latest filing Oct 31, 2019) · No amendment in the last 12 months on an offering that may still be open — Hapten Sciences, Inc. (latest filing Sep 20, 2018) · No amendment in the last 12 months on an offering that may still be open — Hapten Sciences, Inc. (latest filing Jan 12, 2016) · No amendment in the last 12 months on an offering that may still be open — Hapten Sciences, Inc. (latest filing Feb 5, 2015)

What this means SEC rules expect a yearly amendment while an offering is still going. Ask the sponsor which of these raises have closed.

Form D · Oct 31, 2019 ↗Hapten Sciences, Inc. — PartnerFacts page ↗Form D/A · Sep 20, 2018 ↗Form D/A · Jan 12, 2016 ↗
Sources
Note · Jan 12, 2016 – Feb 14, 2017

Raymond J. Hage's role changed at Hapten Sciences, Inc.: executive officer, director, promoter → executive officer, director

The Jan 12, 2016 filing lists Raymond J. Hage as executive officer, director, promoter; the Feb 14, 2017 Form D lists executive officer, 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.

Form D/A · Jan 12, 2016 ↗Form D · Feb 14, 2017 ↗Raymond J. Hage — PartnerFacts page ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Jan 12, 2016 – Feb 14, 2017

Gary Prosterman's role changed at Hapten Sciences, Inc.: executive officer, director, promoter → executive officer, director

The Jan 12, 2016 filing lists Gary Prosterman as executive officer, director, promoter; the Feb 14, 2017 Form D lists executive officer, 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.

Form D/A · Jan 12, 2016 ↗Form D · Feb 14, 2017 ↗Gary Prosterman — PartnerFacts page ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Feb 26, 2018 – Sep 20, 2018

Offering amount changed between filings — Hapten Sciences, Inc.

The Feb 26, 2018 filing says $2,000,000 offered; the Sep 20, 2018 Form D/A says $2,200,000.

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.

Form D/A (earlier) · Feb 26, 2018 ↗Form D/A (later) · Sep 20, 2018 ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Sep 9, 2015 – Jan 12, 2016

Offering amount changed between filings — Hapten Sciences, Inc.

The Sep 9, 2015 filing says $225,000 offered; the Jan 12, 2016 Form D/A says $1,725,000.

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.

Form D (earlier) · Sep 9, 2015 ↗Form D/A (later) · Jan 12, 2016 ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Feb 20, 2013 – Jan 2, 2014

Offering amount changed between filings — Hapten Sciences, Inc.

The Feb 20, 2013 filing says $500,000 offered; the Jan 2, 2014 Form D/A says $1,200,000.

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.

Form D (earlier) · Feb 20, 2013 ↗Form D/A (later) · Jan 2, 2014 ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Feb 20, 2013 – Jan 2, 2014

Minimum investment changed between filings — Hapten Sciences, Inc.

The Feb 20, 2013 filing lists a minimum of $45,455; the Jan 2, 2014 Form D/A lists $25,000.

What this means A different minimum usually means the offering terms changed. Check which terms apply to you.

Form D (earlier) · Feb 20, 2013 ↗Form D/A (later) · Jan 2, 2014 ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Dec 22, 2010 – Jul 21, 2011

Raymond J. Hage is written 2 different ways on the filings

listed as "Raymond Hage" on the Dec 22, 2010 filing, and "Raymond J Hage" on 14 filings (from Jul 21, 2011).

What this means Same person, written differently — a middle name or suffix left off, or spelled another way. It is normal, but check that the full legal name matches your subscription documents.

Form D · Dec 22, 2010 ↗Form D · Jul 21, 2011 ↗Raymond J. Hage — PartnerFacts page ↗
Sources
Note · Dec 22, 2010 – Jul 21, 2011

Gary Prosterman is written 2 different ways on the filings

listed as "Gary J. Prosterman" on the Dec 22, 2010 filing, and "Gary Prosterman" on 14 filings (from Jul 21, 2011).

What this means Same person, written differently — a middle name or suffix left off, or spelled another way. It is normal, but check that the full legal name matches your subscription documents.

Form D · Dec 22, 2010 ↗Form D · Jul 21, 2011 ↗Gary Prosterman — PartnerFacts page ↗
Sources
Note · Jul 21, 2011 – Feb 20, 2013

Reported revenue range changed between filings — Hapten Sciences, Inc.

"No Revenues" (Jul 21, 2011); then "Decline to Disclose" (Feb 20, 2013).

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.

Form D · Jul 21, 2011 ↗Form D · Feb 20, 2013 ↗Hapten Sciences, Inc. — PartnerFacts page ↗
Sources
Note · Dec 22, 2010 – Aug 10, 2021

Member companies were formed in 2 different states

Tennessee (1), Delaware (1) — out of 2 member issuers. The odd ones out: Hapten Sciences, Inc. (Delaware).

What this means Sponsors often form each deal company in Delaware or Wyoming no matter where the property is. A mix is common; it just tells you which state's rules each company lives under.

Hapten Sciences — sponsor group page ↗Hapten Sciences, Inc. — PartnerFacts page ↗
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 10 offerings report sales commissions; 0 report finder's fees; 1 reports proceeds to related persons totalling $108,000. (includes amounts the issuer reported as estimates)

Offering (latest filing)Sales commissionsFinder's feesTo insidersPaid to sell itSource
Aug 10, 2021 D
Hapten Sciences, Inc.
File 021-409422
$0$0$0None listed on this filingEDGAR ↗
Oct 31, 2019 D
Hapten Sciences, Inc.
File 021-352299
$0$0$0None listed on this filingEDGAR ↗
Sep 20, 2018 D/A
Hapten Sciences, Inc.
File 021-306227
$0$0$0None listed on this filingEDGAR ↗
Feb 14, 2017 D
Hapten Sciences, Inc.
File 021-280671
$0$0$0None listed on this filingEDGAR ↗
Jan 12, 2016 D/A
Hapten Sciences, Inc.
File 021-247269
$0$0$0None listed on this filingEDGAR ↗
Apr 16, 2015 D
Hapten Sciences, Inc.
File 021-238100
$0$0$0None listed on this filingEDGAR ↗
Feb 5, 2015 D/A
Hapten Sciences, Inc.
File 021-192115
$0$0$0NA no CRD number reported
via NA
EDGAR ↗
Feb 5, 2015 D
Hapten Sciences, Inc.
File 021-233601
$0$0$0None listed on this filingEDGAR ↗
Jul 21, 2011 D
Hapten Sciences, Inc.
File 021-163284
$0$0$0None listed on this filingEDGAR ↗
Dec 22, 2010 D
Hapten Sciences Development, LLC
File 021-152403
$0$0$108,000 (est.)
These amounts are for salaries and services ongoing over the next year.
None 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 all 2 issuers in this group — every filing in our index, latest filing per offering (SEC file number).

Property records 0 documents · 0 ownership records · last checked Oct 24, 2026, 10:16 AM ET · NYC and Cook County lookup still to run

0 recorded documents and 0 ownership records matched to Hapten Sciences in the sources searched.

Not found in sources searched as of Oct 24, 2026, 10:16 AM ET: Hillsborough County FL Clerk of Court Official Records daily index (publicrec.hillsclerk.com D/P/M files), 2 daily files (Oct 14, 2026 to Oct 15, 2026) — loaded Oct 23, 2026, 8:59 PM ET; Harris County TX (HCAD ownership rolls 2005–2026) — 1,032,426 records, loaded Oct 24, 2026, 8:00 AM ET; Dallas County TX (DCAD ownership rolls 2021–2027) — 285,535 records, loaded Oct 24, 2026, 8:20 AM ET; Hillsborough County FL (FL DOR 2026 ownership roll + Clerk recorded-document index Oct 14, 2026 to Oct 15, 2026), Miami-Dade County FL (FL DOR 2026 ownership roll), Broward County FL (FL DOR 2026 ownership roll), Palm Beach County FL (FL DOR 2026 ownership roll) — 514,336 records, loaded Oct 24, 2026, 8:25 AM ET; King County WA (Assessor sale records 0000-00-00–2026-10-14; no owner-of-record names published) — 538,619 records, loaded Oct 24, 2026, 8:27 AM ET; Cook County IL (Assessor sale records 1982–2026 + ownership rolls 1999–2026) — 1,263,035 records, loaded Oct 24, 2026, 9:34 AM ET. Still to be looked up for this group: NYC ACRIS via NYC Open Data (Real Property Parties 636b-3b5g, Master bnx9-e6tj, Legals 8h5j-fqxa, Document Control Codes 7isb-wh4c) · NYC PLUTO ownership via NYC Open Data (64uk-42ks) · Cook County IL Assessor via Cook County Open Data (Parcel Sales wvhk-k5uv; Parcel Addresses 3723-97qp). Records in other counties, and recorder indexes we do not yet cover, were not searched.

Property records coverage: New York City (ACRIS recorded documents and PLUTO ownership, looked up per issuer when its page is viewed; re-checked when the page is viewed again more than 30 days after the last check); Harris County TX (ownership only, no deed, mortgage or sale records; HCAD ownership rolls 2005–2026); Dallas County TX (ownership only, no deed, mortgage or sale records; DCAD ownership rolls 2021–2027); Hillsborough County FL (FL DOR 2026 ownership roll + Clerk recorded-document index Oct 14, 2026 to Oct 15, 2026), Miami-Dade County FL (FL DOR 2026 ownership roll), Broward County FL (FL DOR 2026 ownership roll), Palm Beach County FL (FL DOR 2026 ownership roll); King County WA (Assessor sale records 0000-00-00–2026-10-14; no owner-of-record names published); Cook County IL (Assessor sale records 1982–2026 + ownership rolls 1999–2026); also looked up per issuer when its page is viewed. Recorder indexes (party names on deeds, mortgages and liens) in TX, AZ, NV, CA and WA counties and outside the Clerk index in FL, mortgages and liens outside NYC and Hillsborough County, lis pendens and foreclosure notices everywhere, Los Angeles County CA, Clark County NV, New York City bulk pass (not finished; per-issuer lookups only so far), Maricopa County AZ (loader ready; commercial-purpose statement not yet filed), Salt Lake County UT, and all other counties are not covered — not searched. Last refresh by source: NYC ACRIS via NYC Open Data (Real Property Parties 636b-3b5g, Master bnx9-e6tj, Legals 8h5j-fqxa, Document Control Codes 7isb-wh4c) Oct 24, 2026, 9:34 AM ET; Cook County IL Assessor via Cook County Open Data (Parcel Sales wvhk-k5uv; Parcel Addresses 3723-97qp) Oct 24, 2026, 9:34 AM ET; Cook County IL Assessor via Cook County Open Data (Parcel Sales wvhk-k5uv; Parcel Addresses 3723-97qp) Oct 24, 2026, 8:30 AM ET; King County WA Assessor Real Property Sales extract (EXTR_RPSale.csv) Oct 24, 2026, 8:27 AM ET; Florida DOR NAL roll (Palm Beach 60) Oct 24, 2026, 8:25 AM ET; Florida DOR NAL roll (Broward 16) Oct 24, 2026, 8:24 AM ET; Florida DOR NAL roll (Dade 23) Oct 24, 2026, 8:23 AM ET; Florida DOR NAL roll (Hillsborough 39) Oct 24, 2026, 8:21 AM ET; Dallas Central Appraisal District ACCOUNT_INFO.CSV Oct 24, 2026, 8:20 AM ET; Harris County Appraisal District real_acct.txt Oct 24, 2026, 8:00 AM ET; Hillsborough County FL Clerk daily index Oct 23, 2026, 8:59 PM ET. NYC and Cook County are also looked up per issuer when its page is viewed; the most recent such lookup on this site finished Oct 24, 2026, 3:30 AM ET. Parties are named as the recorder's index names them (role suffixes as recorded); no address, account number or trust date is shown for an individual, and individual owners of record (home ownership) are not matched or shown. Items still in human review are not shown.

Issuers in this group

Why each issuer is here is stated in the "Linked by" column. Low-confidence links are never shown — they wait for human review.

SourceIssuerLinked byLocationIndustryFilingsSold (max)InvestorsMin. investment (latest filing)Active
EDGAR ↗HS Hapten Sciences Development, LLCshared people, similar issuer namesMEMPHIS, TNBiotechnology1$00$100,0002010–2010
EDGAR ↗HS Hapten Sciences, Inc.shared people, similar issuer namesMEMPHIS, TNPharmaceuticals14$1,587,768
offering $3,000,000 · similar: $1,694,259–$16,000,000
8
similar: 1–13
No minimum reported
similar: $10,000–$55,000
2011–2021

"Similar" = offerings in the same industry claiming the same exemption, filed in the last 5 years: Pharmaceuticals / 506(b) (800 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.

Timeline of offerings

SourceFiledIssuerFormIndustryOfferedSold
EDGAR ↗Aug 10, 2021Hapten Sciences, Inc.DPharmaceuticals$3,000,000$0
EDGAR ↗Oct 31, 2019Hapten Sciences, Inc.DPharmaceuticals$1,500,000$885,980
EDGAR ↗Sep 20, 2018Hapten Sciences, Inc.D/APharmaceuticals$2,200,000$1,587,768
EDGAR ↗Feb 26, 2018Hapten Sciences, Inc.D/APharmaceuticals$2,000,000$632,726
EDGAR ↗Feb 22, 2018Hapten Sciences, Inc.DPharmaceuticals$2,000,000$108,200
EDGAR ↗Feb 14, 2017Hapten Sciences, Inc.DPharmaceuticals$1,200,000$1,200,000
EDGAR ↗Jan 12, 2016Hapten Sciences, Inc.D/APharmaceuticals$1,725,000$1,225,000
EDGAR ↗Sep 9, 2015Hapten Sciences, Inc.DPharmaceuticals$225,000$225,000
EDGAR ↗Apr 16, 2015Hapten Sciences, Inc.DPharmaceuticals$250,000$250,000
EDGAR ↗Feb 5, 2015Hapten Sciences, Inc.DPharmaceuticals$100,000$0
EDGAR ↗Feb 5, 2015Hapten Sciences, Inc.D/APharmaceuticals$1,200,000$625,000
EDGAR ↗Jan 2, 2014Hapten Sciences, Inc.D/APharmaceuticals$1,200,000$475,000
EDGAR ↗Feb 20, 2013Hapten Sciences, Inc.DPharmaceuticals$500,000$0
EDGAR ↗Jul 21, 2011Hapten Sciences, Inc.DPharmaceuticals$1,650,000$0
EDGAR ↗Dec 22, 2010Hapten Sciences Development, LLCDBiotechnology$1,000,000$0

Activity: 0 new offerings in the last 12 months across all issuers in this group (new offering = a Form D that is not an amendment, D/A) · most recent filing Aug 10, 2021. Industry history, as reported on each offering's latest filing: Previous offerings: Biotechnology (2010). Latest offering: Pharmaceuticals (2011–2021; most recent Aug 10, 2021).

People across the group

NameRolesIssuers hereFirst → last listed
RH Raymond J. HageExecutive Officer, Director, Promoter2Dec 22, 2010 → Aug 10, 2021
GP Gary ProstermanExecutive Officer, Director, Promoter2Dec 22, 2010 → Aug 10, 2021
GS Gary StevensonDirector1Feb 20, 2013 → Aug 10, 2021
SB Stephen L. BandakDirector1Feb 14, 2017 → Aug 10, 2021
JZ Joseph ZakrzewskiDirector1Sep 9, 2015 → Feb 14, 2017
SB Stephen I. BandakDirector1Feb 20, 2013 → Jan 12, 2016

Business registration (state registry / Secretary of State)

None of the 2 issuers has a record in the registries searched.

Registries searched: AL (Alabama Secretary of State — Business Entity Records (arc-sos.state.al.us), searched by issuer name, data as of Oct 24, 2026); CO (Colorado Secretary of State — Business Entities in Colorado (data.colorado.gov), data as of Oct 23, 2026); CT (Connecticut Secretary of the State — Business Registry (data.ct.gov), data as of Oct 24, 2026); FL (Florida Department of State, Division of Corporations — quarterly corporate data file (Sunbiz), data as of Oct 7, 2026); KY (Kentucky Secretary of State — Business Entity Search (sosbes.sos.ky.gov), searched by issuer name, data as of Oct 24, 2026); NY (New York Department of State — Corporations and Other Entities (data.ny.gov: All Filings + Active Corporations), data as of Oct 20, 2026); OR (Oregon Secretary of State — Active Businesses, All (data.oregon.gov), data as of Oct 20, 2026); PA (Pennsylvania Department of State — Registered Businesses, Current (data.pa.gov), data as of Oct 6, 2026); TX (Texas Comptroller — Active Franchise Taxpayers incl. Secretary of State file data (data.texas.gov), data as of Oct 24, 2026). Registries of other states have not been searched: many publish no bulk file and require a CAPTCHA or bot challenge on their search page, which we do not bypass (Delaware, for example, offers no public bulk file). A registry listing is the state's own record of the entity; it says nothing about the offering itself.

Adviser registration (Form ADV)

Searched SEC Form ADV bulk data (registered + exempt reporting advisers) (24,962 records as of Oct 2, 2026, 8:00 AM ET) — nothing matched Hapten Sciences.

Meta advertising

No Meta Pixel ids or Facebook / Instagram page links on file for Hapten Sciences as of Oct 24, 2026 — the sponsor website is read for them once it is on file (runs automatically). Meta Ad Library: not searched by PartnerFacts (no API access); a one-tap Ad Library search is under Look further.

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.

Public profiles and social

No website or social profile named in Hapten Sciences's SEC filings (Form C, Reg A, Form ADV; checked Oct 24, 2026). Web search for this name: #183,865 of 374,652 in line (1,386 issuers searched so far). One-tap searches: Look further ↓

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Look further

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Courts

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Securities regulators

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Business registries

Tennessee Secretary of State business search ↗OpenCorporates ↗