What SEC filings does Black Stone Minerals, L.P. submit to the SEC?

Black Stone Minerals, L.P. (BSM) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about BSM?

A Form 4 for BSM discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Black Stone Minerals, L.P.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for BSM?

The 10-K is Black Stone Minerals, L.P.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all BSM SEC filings directly on EDGAR?

You can view all historical Black Stone Minerals, L.P. filings on the SEC EDGAR company page for BSM. Each filing card on this page links directly to the original SEC document.

How often does Black Stone Minerals, L.P. file with the SEC?

Black Stone Minerals, L.P. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling BSM shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

BSM SEC Filing News — Black Stone Minerals, L.P.

Latest SEC filings for Black Stone Minerals, L.P. (BSM) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-05.

Black Stone Minerals, L.P., together with its subsidiaries, owns and manages oil and natural gas mineral interests. It owns mineral interests in approximately 16.9 million gross acres, nonparticipating royalty interests in 1.8 million gross acres, and overriding royalty interests in 1.6 million gross acres located in 41 states in the United States. The company was founded in 1876 and is based in Houston, Texas.

Sector: Energy Industry: Oil & Gas E&P Market Cap: $3.2B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for BSM currently lean bearish. Of the 20 filing records displayed, 3 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 2 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

BSM Filing Activity Snapshot 2026-05-28 — 2026-10-05

Insider Transactions (Form 4)

2 buys vs 1 sell

Net insider buying in this period — more purchases than sales reported.

Largest Form 144 Filing

$28.10M

Whitehead James (Director) · 2026-08-10

2,127,105 shares · Form 4

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 15 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 15 filings in this group are Form 4s for Black Stone Minerals, L.P.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 15 insider filings shown, the breakdown is 10 compensation award, 2 open-market purchase, 1 gift, 1 other reported transaction and 1 open-market sale. 3 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×10: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market purchase ×2: The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Gift ×1: Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.
Other reported transaction ×1: The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.
Open-market sale ×1: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Stuart Alexander D. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,658	$14.32	$23.7K

Filing: Form 4 (Insider Transaction) Insider: Stuart Alexander D. (Director) Shares: 1,658

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Kyle Jerry V. Jr. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,309	$14.32	$18.7K

Filing: Form 4 (Insider Transaction) Insider: Kyle Jerry V. Jr. (Director) Shares: 1,309

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Randall William E. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,571	$14.32	$22.5K

Filing: Form 4 (Insider Transaction) Insider: Randall William E. (Director) Shares: 1,571

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

BSM insider Form 4 filed for equity award, exercise, or tax withholding

DeWalch D Mark (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,309	$14.32	$18.7K

Filing: Form 4 (Insider Transaction) Insider: DeWalch D Mark (Director) Shares: 1,309

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-10-05

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Hamman Anne Lenoir (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,309	$14.32	$18.7K

Filing: Form 4 (Insider Transaction) Insider: Hamman Anne Lenoir (Director) Shares: 1,309

View on SEC EDGAR → Open Filing Document →

Form 4 Gift Tax / Compensation Filing 2026-08-19

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Stuart Alexander D. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`G`	Gift	15,900	—	—

Filing: Form 4 (Insider Transaction) Insider: Stuart Alexander D. (Director) Shares: 15,900

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-10

BSM insider Whitehead James (Director) sold 2,127,105 shares (~$28.10M)

Whitehead James, listed as Director at Black Stone Minerals, L.P., reported an open-market sale of 2,127,105 BSM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	498,343	$13.21	$6.58M
`S`	Open-market sale	1,628,762	$13.21	$21.52M

Filing: Form 4 (Insider Transaction) Insider: Whitehead James (Director) Shares: 2,127,105 Est. Value: $28.10M

View on SEC EDGAR → Open Filing Document →

Form 4 Other reported transaction Tax / Compensation Filing 2026-08-04

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Kyle Jerry V. Jr. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`J`	Other transaction	7,665	—	—

Filing: Form 4 (Insider Transaction) Insider: Kyle Jerry V. Jr. (Director) Shares: 7,665

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

BSM insider Form 4 filed for equity award, exercise, or tax withholding

DeWalch D Mark (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,342	$13.97	$18.7K

Filing: Form 4 (Insider Transaction) Insider: DeWalch D Mark (Director) Shares: 1,342

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Randall William E. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,610	$13.97	$22.5K

Filing: Form 4 (Insider Transaction) Insider: Randall William E. (Director) Shares: 1,610

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Kyle Jerry V. Jr. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,342	$13.97	$18.7K

Filing: Form 4 (Insider Transaction) Insider: Kyle Jerry V. Jr. (Director) Shares: 1,342

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Stuart Alexander D. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,700	$13.97	$23.7K

Filing: Form 4 (Insider Transaction) Insider: Stuart Alexander D. (Director) Shares: 1,700

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-07-02

BSM insider Form 4 filed for equity award, exercise, or tax withholding

Hamman Anne Lenoir (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	1,342	$13.97	$18.7K

Filing: Form 4 (Insider Transaction) Insider: Hamman Anne Lenoir (Director) Shares: 1,342

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-06-02

BSM insider DeWalch D Mark (Director) bought 72,726 shares (~$985.4K)

DeWalch D Mark, listed as Director at Black Stone Minerals, L.P., reported an open-market purchase of 72,726 BSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	36,363	$13.48	$490.0K
`P`	Open-market purchase	36,363	$13.62	$495.3K

Filing: Form 4 (Insider Transaction) Insider: DeWalch D Mark (Director) Shares: 72,726 Est. Value: $985.4K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-05-28

BSM insider DeWalch D Mark (Director) bought 37,650 shares (~$497.3K)

DeWalch D Mark, listed as Director at Black Stone Minerals, L.P., reported an open-market purchase of 37,650 BSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	37,650	$13.21	$497.3K

Filing: Form 4 (Insider Transaction) Insider: DeWalch D Mark (Director) Shares: 37,650 Est. Value: $497.3K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 2 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Black Stone Minerals, L.P. has 2 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Large Proposed Insider Sale 2026-08-06

BSM Form 144 filed for proposed insider sale by EAGLE GATHERING SYSTEM (498,343 shares) ~$6.58M

EAGLE GATHERING SYSTEM filed a Form 144 with the SEC indicating intent to sell BSM (Black Stone Minerals, L.P.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: EAGLE GATHERING SYSTEM Shares: 498,343 Est. Value: $6.58M

View on SEC EDGAR → Open Filing Document →

Form 144 Large Proposed Insider Sale 2026-08-06

BSM Form 144 filed for proposed insider sale by LACY PROPERTIES, LTD. (1,628,762 shares) ~$21.52M

LACY PROPERTIES, LTD. filed a Form 144 with the SEC indicating intent to sell BSM (Black Stone Minerals, L.P.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: LACY PROPERTIES, LTD. Shares: 1,628,762 Est. Value: $21.52M

View on SEC EDGAR → Open Filing Document →

Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Black Stone Minerals, L.P. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-04

BSM filed 8-K — material company event

Black Stone Minerals, L.P. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-16

BSM filed 8-K — material company event

Black Stone Minerals, L.P. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 1 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 quarterly report (10-Q) for Black Stone Minerals, L.P.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-04

BSM filed Quarterly Report (10-Q)

Black Stone Minerals, L.P. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

How we classify Black Stone Minerals, L.P.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on BSM. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — BSM SEC Filings

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BSM Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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