SEC ownership of BIG SKY INDUSTRIAL INC.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000101594.

Comparable stake leader

John A. Weinzierl

Disclosed value leader

John A. Weinzierl

Comparable rows

37/46

Latest evidence

29 Apr 2026

Top shareholders Insider holders Latest transactions
Public ticker
BSIN on Nasdaq, USEG
Parsed ownership sources
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
John A. Weinzierl
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
37 of 46
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
John A. Weinzierl
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
29 Apr 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0000101594
Issuer location
Houston, TX

Ownership snapshot

Top shareholders of BIG SKY INDUSTRIAL INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
John A. Weinzierl
Disclosed value leader
John A. Weinzierl
Comparable rows
37/46
Latest evidence
29 Apr 2026
3/4/5 13D/G 13F Lead comparable stake: 19% 9 rows are not safely comparable across share classes. 13D/G row: John A. Weinzierl Showing 1-8 of 46 holder rows.

Quick read

John A. Weinzierl leads the comparable SEC ownership view at 19%.

37 of 46 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens John A. Weinzierl's linked filing trail.
Comparable ownership Top 5
John A. Weinzierl 19%
Joshua L. Batchelor 18%
Synergy Offshore LLC 12%
Duane H. King 7.2%
John Alfred Weinzierl 2020 Trust ... 17%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 46 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
John A. Weinzierl
3/4/5 13D/G
Director, Member of 10% owner group, 10%+ Owner · Weinzierl John A
3/4/5 13D/G
19%
from 13D/G
$7,758,169
9,235,219 shares
mixed-class rows
 — 29 Apr 2026
Joshua L. Batchelor
13D/G 3/4/5
Batchelor Joshua Lane · Member of 10% owner group, 10%+ Owner
13D/G 3/4/5
18%
$6,948,636
6,204,139 shares
 $0 27 Jan 2025
Synergy Offshore LLC
13D/G
King Duane H
13D/G
12%
$4,005,469
3,576,312 shares
 $0 09 Jan 2025
Duane H. King
13D/G 3/4/5
King Duane H · Director, Member of 10% owner group
13D/G 3/4/5
7.2%
$3,011,984
2,548,641 shares
 $0 28 Oct 2025
John Alfred Weinzierl 2020 Trust u/a November 10, 2020
3/4/5
Member of 10% owner group, 10%+ Owner
3/4/5
17%
$7,758,169
8,775,219 shares
 — 29 Apr 2026
Katla Energy Holdings LLC
3/4/5
Member of 10% owner group, 10%+ Owner
3/4/5
17%
$7,758,169
8,775,219 shares
 — 29 Apr 2026
Empery Asset Management, LP
13F
Company
13F
3.7%
$1,695,566
1,917,844 shares
 — 31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC
13F
Company
13F
1.1%
$495,930
561,007 shares
 — 31 Mar 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$1,562,712.

Buys
$19,950
Insiders: 1
Sells
$1,582,662
Insiders: 1
Net
-$1,562,712
Shares: -1,217,410
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 21,000 Shares: 1,238,410
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 15,000 700,000 $13,050 $907,087 -$894,037
6-9 0 0 $0 $0 $0
9-12 6,000 538,410 $6,900 $675,575 -$668,675

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-15 of 15 reporting-owner rows connected to BIG SKY INDUSTRIAL INC.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
15
Largest Forms 3/4/5 holder
Katla Energy Holdings LLC
Net 12M change
-$1,562,712
Latest report
29 Apr 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Katla Energy Holdings LLC Member of 10% owner group, 10%+ Owner $7,758,169 Mixed 29 Apr 2026
John A. Weinzierl Director, Member of 10% owner group, 10%+ Owner $7,758,169 Mixed 29 Apr 2026
John Alfred Weinzierl 2020 Trust u/a November 10, 2020 Member of 10% owner group, 10%+ Owner $7,758,169 Mixed 29 Apr 2026
Marsh Wallis T. 10%+ Owner $2,812,404 Mixed 10 Oct 2022
WDM Family Partnership, LP 10%+ Owner $2,764,723 Mixed 19 Jul 2022
Duane H. King Director, Member of 10% owner group $2,383,325 Mixed 04 Mar 2026
Ryan Lewis Smith CEO, Director $973,329 +$19,950 +2.1% Filing P/S 31 Mar 2026
Joshua L. Batchelor Member of 10% owner group, 10%+ Owner $408,265 -$1,582,662 -79% Filing P/S 02 Mar 2026
Mark L. Zajac Cfo $280,368 Mixed 19 Mar 2026
Stephen Slack Director $211,002 Mixed 04 Mar 2026
James W. Denny III Director $211,002 Mixed 04 Mar 2026
Donald A. Kessel Chief Operating Officer $203,531 Mixed 27 Jan 2023
Randall D. Keys Director $195,852 Mixed 04 Mar 2026
Javier F. Pico Former director $16,200 Mixed 05 Jan 2022
Lubbock Energy Partners LLC 10%+ Owner Mixed 19 Jul 2022

Recent insider transactions for BIG SKY INDUSTRIAL INC.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Weinzierl John A USEG Common Stock Other 909,000 909,000 29 Apr 2026 By trust for which spouse serves as trustee.
Weinzierl John A USEG Common Stock Other 909,000 909,000 29 Apr 2026 By trust for which spouse serves as trustee.
John A. Weinzierl USEG Common Stock Other 909,000 909,000 29 Apr 2026 By trust for which spouse serves as trustee.
Weinzierl John A USEG Common Stock Other 29.1% 909,000 4,033,893 29 Apr 2026 By John Alfred Weinzierl 2020 Trust, u/t/a November 10, 2020
Weinzierl John A USEG Common Stock Other 29.1% 909,000 4,033,893 29 Apr 2026 By John Alfred Weinzierl 2020 Trust, u/t/a November 10, 2020
John A. Weinzierl USEG Common Stock Other 29.1% 909,000 4,033,893 29 Apr 2026 By John Alfred Weinzierl 2020 Trust, u/t/a November 10, 2020
Weinzierl John A USEG Common Stock Other -32.2% -1,818,000 3,832,326 29 Apr 2026 Direct
Weinzierl John A USEG Common Stock Other -32.2% -1,818,000 3,832,326 29 Apr 2026 Direct
John A. Weinzierl USEG Common Stock Other -32.2% -1,818,000 3,832,326 29 Apr 2026 Direct
Ryan L. Smith USEG Common Stock Purchase 1.36% $13,050 $0.8700 15,000 1,118,769 31 Mar 2026 Direct
Mark L. Zajac USEG Common Stock Tax liability -7.3% -21,853 277,593 19 Mar 2026 Direct
Ryan L. Smith USEG Common Stock Tax liability -1.71% -19,177 1,103,769 19 Mar 2026 Direct
Duane H. King USEG Non-Qualified Stock Option (right to buy) Award 230,000 230,000 04 Mar 2026 Direct
Mark L. Zajac USEG Stock Option (right to buy) Award 375,000 375,000 04 Mar 2026 Direct
John A. Weinzierl USEG Non-Qualified Stock Option (right to buy) Award 460,000 460,000 04 Mar 2026 Direct
Ryan L. Smith USEG Non-Qualified Stock Option (right to buy) Award 1,500,000 1,500,000 04 Mar 2026 Direct
Stephen Slack USEG Non-Qualified Stock Option (right to buy) Award 230,000 230,000 04 Mar 2026 Direct
Randall D. Keys USEG Non-Qualified Stock Option (right to buy) Award 230,000 230,000 04 Mar 2026 Direct
James W. Denny III USEG Non-Qualified Stock Option (right to buy) Award 230,000 230,000 04 Mar 2026 Direct
Joshua L. Batchelor USEG Common Stock Sale -77.2% $363,071 $1.37 -265,170 78,299 03 Mar 2026 Direct
Joshua L. Batchelor USEG Common Stock Sale -83.7% $544,016 $1.25 -434,830 84,663 02 Mar 2026 Direct
Mark L. Zajac USEG Common Stock Tax liability -6.4% -20,490 299,446 13 Feb 2026 Direct
Ryan L. Smith USEG Common Stock Tax liability -3.38% -39,259 1,122,946 13 Feb 2026 Direct
Ryan L. Smith USEG Common Stock Tax liability -1.76% -20,834 1,162,205 05 Jan 2026 Direct
John A. Weinzierl USEG Common Stock Other -100% -1,400,000 0 28 Oct 2025 By Synergy Offshore LLC
John A. Weinzierl USEG Common Stock Other 16.4% 796,761 5,650,326 28 Oct 2025 Direct
Duane H. King USEG Common Stock Other -100% -1,400,000 0 28 Oct 2025 By Synergy Offshore LLC
Duane H. King USEG Common Stock Other 16.4% 332,329 2,359,728 28 Oct 2025 Direct
Joshua L. Batchelor USEG Common Stock Sale -63.8% $209,364 $1.25 -167,438 95,063 27 Oct 2025 Direct
Joshua L. Batchelor USEG Common Stock Sale -63.9% $222,010 $1.25 -177,070 100,087 24 Oct 2025 Direct
Joshua L. Batchelor USEG Common Stock Sale -64.8% $244,200 $1.26 -193,902 105,400 23 Oct 2025 Direct
Ryan L. Smith USEG Common Stock Purchase 0.34% $4,560 $1.14 4,000 1,183,039 12 Sep 2025 Direct
Ryan L. Smith USEG Common Stock Purchase 0.17% $2,340 $1.17 2,000 1,179,039 13 Aug 2025 Direct
* marks a reported price that did not pass the local price check.
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