Comparable stake leader
Hartree Partners, LP
SEC ownership of STAR GROUP, L.P.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001002590.
Disclosed value leader
Hartree Partners, LP
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- SGU on NYSE
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Hartree Partners, LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Hartree Partners, LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001002590
- Issuer location
- Stamford, CT
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of STAR GROUP, L.P. (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
Hartree Partners, LP
Disclosed value leader
Hartree Partners, LP
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 9.8%
13D/G row: Hartree Partners, LP
Showing 1-8 of 50 holder rows.
Quick read
Hartree Partners, LP leads the comparable SEC ownership view at 9.8%.
50 of 50 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 Hartree Partners, LP's linked filing trail.
Comparable ownership
Top 5
Hartree Partners, LP
9.8%
Bandera Partners LLC
8.7%
C. Scott Baxter
0.04%
Jeffrey S. Hammond
0.02%
Summit Trail Advisors, LLC
6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Hartree Partners, LP |
13D/G
3/4/5
13F
10%+ Owner · Company
|
9.8%
|
$42,851,428
3,400,907 shares
|
$0 | 31 Mar 2025 |
| Bandera Partners LLC |
13D/G
3/4/5
13F
Gramm Jefferson · Other*, 10%+ Owner · Company
|
8.7%
|
$34,920,303
2,951,843 shares
|
$0 | 30 Jun 2025 |
| C. Scott Baxter |
3/4/5
Director
|
0.04%
|
$176,850
15,000 shares
|
+$176,850 | 13 Aug 2025 |
| Jeffrey S. Hammond |
3/4/5
Chief Operating Officer
|
0.02%
|
$57,623
5,739 shares
|
+$1,257 | 05 Nov 2025 |
| Summit Trail Advisors, LLC |
13F
Company
|
6%
|
$24,830,160
2,022,000 shares
|
— | 31 Mar 2026 |
| Lubar & Co., Inc |
13F
Company
|
3.8%
|
$15,914,696
1,295,985 shares
|
— | 31 Mar 2026 |
| Oakcliff Capital Partners, LP |
13F
Company
|
3.2%
|
$13,498,655
1,099,239 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
2.7%
|
$11,176,126
910,108 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 buying over the last 12 months. Net value: +$178,107.
Buys
$178,107
Insiders: 2
Sells
$0
Insiders: 0
Net
+$178,107
Shares: +15,105
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 15,105
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 15,105 | 0 | $178,107 | $0 | +$178,107 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-8 of 8 reporting-owner rows connected to STAR GROUP, L.P.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
8
Largest Forms 3/4/5 holder
Hartree Partners, LP
Net 12M change
+$178,107
Latest report
05 Nov 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Hartree Partners, LP | 10%+ Owner | $40,266,738 | Mixed | 06 Aug 2025 | ||
| Bandera Partners LLC | Other*, 10%+ Owner | $33,054,134 | Filing P/S | 30 May 2025 | ||
| Bryan H. Lawrence | Director | $19,035,293 | Mixed | 29 Aug 2022 | ||
| Paul A. Vermylen Jr. | Director | $16,980,675 | Mixed | 03 Nov 2021 | ||
| Richard F. Ambury | Chief Financial Officer | $653,505 | Mixed | 23 May 2022 | ||
| Jeffrey M. Woosnam | President and CEO, Director | $225,918 | Mixed | 23 May 2022 | ||
| C. Scott Baxter | Director | $176,850 | +$176,850 | +100% | Filing P/S | 13 Aug 2025 |
| Jeffrey S. Hammond | Chief Operating Officer | $57,623 | +$1,257 | +2.2% | Filing P/S | 05 Nov 2025 |
Recent insider transactions for STAR GROUP, L.P.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Jeffrey S. Hammond | SGU | Common Units | Purchase | 1.54% | $1,257 | $11.99 | 105 | 6,903 | 05 Nov 2025 | Direct |
| C. Scott Baxter | SGU | Common Units | Purchase | $176,850 | $11.79 | 15,000 | 15,000 | 13 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.