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
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Blackstone Holdings III L.P.
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
07 Jun 2022
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001703785
- Issuer location
- Denver, CO
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
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.
Open SEC evidence
Opens Blackstone Holdings III L.P.'s linked filing trail.
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 12 Oct 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 Forms 3/4/5 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.