Comparable stake leader
Blackstone Holdings III L.P.
SEC ownership of STR Sub Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001703785.
Disclosed value leader
—
Comparable rows
0/9
Latest evidence
07 Jun 2022
- Ownership evidence mix
- 3/4/5
- Largest current holder
- Blackstone Holdings III L.P.
- Latest evidence date
- 07 Jun 2022
- CIK
- 0001703785
- Location
- Denver, CO
Ownership snapshot
1 signal
Issuer identity
2 identity fields
Ownership snapshot
Top shareholders of STR Sub 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
Blackstone Holdings III L.P.
Disclosed value leader
—
Comparable rows
0/9
Latest evidence
07 Jun 2022
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
9 rows are not safely comparable across share classes.
Showing 1-8 of 9 holder rows.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 9 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.
Detailed SEC evidence table Showing 1-8 of 9 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Blackstone Holdings III L.P. |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
24,391,476 shares
mixed-class rows
|
— | 07 Jun 2022 |
| BROOKFIELD Corp /ON/ |
3/4/5
Director, 10%+ Owner
|
—
class O/S missing
|
—
12,935,120 shares
|
— | 07 Jun 2022 |
| Source Energy Partners, LLC |
3/4/5
Director, 10%+ Owner
|
—
class O/S missing
|
—
12,935,120 shares
|
— | 07 Jun 2022 |
| Daniel C. Herz |
3/4/5
CEO and President, Director
|
—
class O/S missing
|
—
1,329,096 shares
|
— | 12 May 2021 |
| Bryan Gunderson |
3/4/5
CEO and President, Director
|
—
class O/S missing
|
—
113,110 shares
|
— | 07 Jun 2022 |
| Michael J. Downs |
3/4/5
Chief Operating Officer
|
—
class O/S missing
|
—
93,818 shares
|
— | 07 Jun 2022 |
| Matthew B. Ockwood |
3/4/5
Chief Financial Officer
|
—
class O/S missing
|
—
60,000 shares
|
— | 28 Jun 2021 |
| William David Anderson |
3/4/5
Director
|
—
class O/S missing
|
—
43,524 shares
|
— | 23 Aug 2021 |
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
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 01 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
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 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 29 reporting-owner rows connected to STR Sub Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
29
Largest current holder
Mark Henle
Net 12M change
$0
Latest report
29 Dec 2022
Recent insider transactions for STR Sub 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.