Big Sky Industrial director reports equity holdings

BIG SKY INDUSTRIAL INC. former director Randall D. Keys reported his equity holdings as of May 8, 2026, when his term on the board expired and he ceased to be subject to Section 16.

Rhea-AI Filing Summary

BIG SKY INDUSTRIAL INC. former director Randall D. Keys reported his equity holdings as of May 8, 2026, when his term on the board expired and he ceased to be subject to Section 16. No trades occurred; the filing is voluntary and for position-reporting only.

Keys holds 193,913 shares of common stock directly. He also holds a non-qualified stock option for 230,000 shares of common stock at an exercise price of $1.11 per share, granted on March 4, 2026. This option became fully vested and exercisable on May 8, 2026 and remains outstanding and unexercised.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Keys Randall D

Role Insider

Type	Security	Shares	Price	Value
holding	Non-Qualified Stock Option (right to buy) F1	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 230,000 contracts (Direct); Common Stock — 193,913 shares (Direct)

Footnotes (1)

1. F1. The stock option was granted on March 4, 2026 and became fully vested and exercisable on May 8, 2026 upon the expiration of the Reporting Person's term as a director. The option remains outstanding and unexercised. No transaction is reported with respect to the option; it is included in Table II solely to reflect the Reporting Person's derivative holdings.

Key Figures

Common shares held: 193,913 shares Option underlying shares: 230,000 shares Option exercise price: $1.11 per share +2 more

5 metrics

Common shares held 193,913 shares Direct holdings of common stock as of May 8, 2026

Option underlying shares 230,000 shares Non-qualified stock option for common stock held directly

Option exercise price $1.11 per share Exercise price of non-qualified stock option granted March 4, 2026

Option expiration date March 4, 2036 Expiration of non-qualified stock option position

Vesting date May 8, 2026 Date option became fully vested and exercisable

Key Terms

Non-Qualified Stock Option, Section 16 of the Securities Exchange Act of 1934, fully vested and exercisable

3 terms

Non-Qualified Stock Option financial

"The stock option was granted on March 4, 2026 and became fully vested"

A non-qualified stock option (NSO) is a contract that lets an employee or service provider buy company shares at a fixed price for a set period, like a voucher to purchase stock later at today’s price. It matters to investors because exercising NSOs creates ordinary income for the holder and can increase share count, affecting a company’s earnings and ownership mix; think of it as a future sale that can dilute existing shareholders and has immediate tax consequences for the recipient.

Section 16 of the Securities Exchange Act of 1934 regulatory

"ceased to be subject to Section 16 of the Securities Exchange Act of 1934"

A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.

fully vested and exercisable financial

"became fully vested and exercisable on May 8, 2026 upon the expiration"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 4 filing by Randall D. Keys for BSIN report?

It reports no transactions; it only discloses Randall D. Keys’ holdings in BIG SKY INDUSTRIAL INC. as of May 8, 2026, when his term as director ended.

How many BSIN common shares does Randall D. Keys hold?

Randall D. Keys directly holds 193,913 shares of BIG SKY INDUSTRIAL INC. common stock as of May 8, 2026, according to the voluntary holdings-only Form 4 filing.

What stock options does Randall D. Keys have in BIG SKY INDUSTRIAL INC. (BSIN)?

He holds a non-qualified stock option for 230,000 shares of BSIN common stock at an exercise price of $1.11 per share, expiring on March 4, 2036.

Did Randall D. Keys trade BSIN shares or options in this Form 4?

No. The filing states that no transaction is being reported. The securities in Tables I and II are listed solely to show his holdings as of May 8, 2026.

When did Randall D. Keys cease being subject to Section 16 for BSIN?

He ceased to be subject to Section 16 upon the expiration of his term as a member of BIG SKY INDUSTRIAL INC.’s Board of Directors on May 8, 2026.

Is Randall D. Keys’ BSIN stock option currently exercisable?

Yes. The non-qualified stock option granted on March 4, 2026 became fully vested and exercisable on May 8, 2026 and remains outstanding and unexercised.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/11/2026 - 05:05 PM Accepted by SEC EDGAR 08/11/2026 - 05:05 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Keys Randall D

(Last) (First) (Middle)

C/O BIG SKY INDUSTRIAL INC.

1616 S. VOSS, SUITE 725

(Street)

HOUSTON TEXAS 77057

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
BIG SKY INDUSTRIAL INC. [ BSIN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Former Director

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock								193,913	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (right to buy)(1)	$1.11							05/08/2026	03/04/2036	Common Stock	230,000		230,000	D

Explanation of Responses:

1. The stock option was granted on March 4, 2026 and became fully vested and exercisable on May 8, 2026 upon the expiration of the Reporting Person's term as a director. The option remains outstanding and unexercised. No transaction is reported with respect to the option; it is included in Table II solely to reflect the Reporting Person's derivative holdings.

Remarks:

The Reporting Person ceased to be subject to Section 16 of the Securities Exchange Act of 1934 upon the expiration of his term as a member of the Board of Directors of the Issuer on May 8, 2026. This Form 4 is being filed voluntarily; no transaction is being reported. The securities reported in Table I and Table II are reported solely to reflect the Reporting Person's holdings as of that date.

	/s/ Randall D. Keys	08/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)