Data last updated: Oct 23, 2026, 5:45 PM ETLatest filing: Oct 22, 2026Now: Oct 24, 2026, 10:12 AM ET

Sponsor Check › Person

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John H. Longmaid

Named as an officer, director or promoter on SEC Form D filings · TX · Jul 3, 2017 → Oct 31, 2018

2deals (issuers)

$212.3Mreported sold

240investors

5Form D filings

2017–2018years on file

Follow this person Look further ↓PDF

Data last updated Oct 23, 2026, 5:45 PM ET · Courts (RECAP) last checked: Oct 24, 2026, 2:19 AM ET · SEC enforcement last checked: covered by the index scan as of Oct 24, 2026, 2:50 AM ET

The short version

John H. Longmaid is listed as a director on 5 SEC Form D filings by 2 issuers between Jul 2009 and Oct 2018: BLACK STONE MINERALS CO LP (Houston, TX — oil and gas — 2009; $157.6M reported sold to 178 investors) and Black Stone Minerals, L.P. (Houston, TX — oil and gas — 2017–2018; $54.7M reported sold to 62 investors).

What this means 2 separate companies raised money with this person listed as director, over about 9 years. Across those companies the filings report $212.3M sold in total.

Listed alongside Alexander D. Stuart (5 shared filings), D. Mark DeWalch (5 shared filings), Thomas L. Carter, Jr. (5 shared filings), William G. Bardel (5 shared filings), Allison K. Thacker (4 shared filings) and 21 others.

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

All 2 issuers belong to the sponsor group Black Stone (2 issuers, $161.4M reported sold, 2009–2025).

What this means A sponsor group is one team that sets up a new company for each deal. Black Stone has 2 companies on file and $161.4M 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 (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) — 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 5 public filings for John H. Longmaid and found 4 differences: Form D filed 17 days after the first sale; No amendment in the last 12 months on an offering that may still be open; 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 John H. Longmaid has not run yet — it is joining a line of 48,874 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, 2:19 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 John H. Longmaid..

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, 2:19 AM ET.

4. Differences between public sources

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

4 differences found between the filings for John H. Longmaid (compared 5 filings on Oct 24, 2026)

Note · Jun 16, 2017 – Jul 3, 2017

Form D filed 17 days after the first sale — Black Stone Minerals, L.P.

The filing says the first sale was Jun 16, 2017. The Form D was filed Jul 3, 2017 — 17 days later. The rule: a Form D is generally due within 15 days after the first sale, so this one is 2 days past that.

What this means A late notice is common and carries no penalty by itself. It is worth asking the sponsor why the paperwork lagged.

Form D · Jul 3, 2017 ↗Black Stone Minerals, L.P. — PartnerFacts page ↗

Sources

Form D · Jul 3, 2017 ↗ (Jul 3, 2017)
Black Stone Minerals, L.P. — PartnerFacts page ↗ (Mar 25, 2025)

Note · Aug 16, 2017 – Aug 31, 2017

No amendment in the last 12 months on an offering that may still be open — Black Stone Minerals, L.P. (latest filing Aug 31, 2017)

The latest filing for this offering is dated Aug 31, 2017 (first sale Aug 16, 2017). It reports $500,000 sold of $3,500,000 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.

Form D · Aug 31, 2017 ↗Black Stone Minerals, L.P. — PartnerFacts page ↗

Sources

Form D · Aug 31, 2017 ↗ (Aug 31, 2017)
Black Stone Minerals, L.P. — PartnerFacts page ↗ (Mar 25, 2025)

Note · Jul 3, 2017 – Aug 31, 2017

Offering amount changed between filings — Black Stone Minerals, L.P.

The Jul 3, 2017 filing says $45,000,000 offered; the Aug 31, 2017 Form D/A says $54,700,000.

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) · Jul 3, 2017 ↗Form D/A (later) · Aug 31, 2017 ↗Black Stone Minerals, L.P. — PartnerFacts page ↗

Sources

Form D (earlier) · Jul 3, 2017 ↗ (Jul 3, 2017)
Form D/A (later) · Aug 31, 2017 ↗ (Aug 31, 2017)
Black Stone Minerals, L.P. — PartnerFacts page ↗ (Mar 25, 2025)

Note · Jul 20, 2009 – Jul 3, 2017

John H. Longmaid is written 2 different ways on the filings

listed as "John Longmaid" on the Jul 20, 2009 filing, and "John H. Longmaid" on 4 filings (from Jul 3, 2017).

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 · Jul 20, 2009 ↗Form D · Jul 3, 2017 ↗John H. Longmaid — 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

None reported on 4 offerings — no sales commissions, finder's fees or proceeds to insiders

Per-offering detail

Offering (latest filing)	Sales commissions	Finder's fees	To insiders	Paid to sell it	Source
Oct 31, 2018 D Black Stone Minerals, L.P. File 021-324821	$0	$0	$0	None listed on this filing	EDGAR ↗
Aug 31, 2017 D/A Black Stone Minerals, L.P. File 021-289946	$0	$0	$0	None listed on this filing	EDGAR ↗
Aug 31, 2017 D Black Stone Minerals, L.P. File 021-293836	$0	$0	$0	None listed on this filing	EDGAR ↗
Jul 20, 2009 D BLACK STONE MINERALS CO LP File 021-40185	$0	$0	$0 (est.) The gross proceeds of the offering will be used as working capital. Accordingly, some of the offering proceeds may be used to pay customary compensation to executive officers or board members.	None listed on this filing	EDGAR ↗

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 John H. Longmaid on a Form D, newest first. A Form D is the notice a company files after it starts selling a private investment.

Other Energy · group: Black Stone

Black Stone Minerals, L.P.

Houston, TX · Jul 3, 2017 → Oct 31, 2018 · 4 filings

Oct 31, 2018 · D · $130,000 sold of $130,000 · 1 investors · min. No minimum reported · role: Director EDGAR ↗
Aug 31, 2017 · D · $500,000 sold of $3,500,000 · 2 investors · min. No minimum reported · role: Director EDGAR ↗
Aug 31, 2017 · D/A · $54,700,000 sold of $54,700,000 · 62 investors · min. No minimum reported · role: Director EDGAR ↗
Jul 3, 2017 · D · $45,000,000 sold of $45,000,000 · 62 investors · min. No minimum reported · role: Director EDGAR ↗

Raised $54.7M from 62 investors (100% of the $130K target) as of the latest filing. John is listed as director on 4 filings for this deal.

Latest filing on EDGAR ↗

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 Energy / 506(b) (1,000 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.

Oil and Gas · group: Black Stone

BLACK STONE MINERALS CO LP

Houston, TX · Jul 20, 2009

Jul 20, 2009 · D · $157,565,000 sold of $157,565,000 · 178 investors · min. $1,000 · role: Director (Member of the Board of Managers of Black Stone Natural Resources, L.L.C.) EDGAR ↗

Raised $157.6M from 178 investors (100% of the $157.6M target) as of the latest filing. John is listed as director.

Latest filing on EDGAR ↗

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.

People around John 26

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

Management entity