Comparable stake leader
Catherine S. Massie
SEC ownership of EVERFLOW EASTERN PARTNERS LP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000868082.
Disclosed value leader
Catherine S. Massie
Comparable rows
0/7
Latest evidence
31 Dec 2025
- Parsed ownership sources
- 3/4/5
- Largest SEC-reported holder
- Catherine S. Massie
- Latest parsed ownership date
- 31 Dec 2025
- Issuer CIK
- 0000868082
- Issuer location
- Canfield, OH
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 EVERFLOW EASTERN PARTNERS LP (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
Catherine S. Massie
Disclosed value leader
Catherine S. Massie
Comparable rows
0/7
Latest evidence
31 Dec 2025
3/4/5
Highest disclosed value: $580,642
7 rows are not safely comparable across share classes.
Quick read
Catherine S. Massie has the largest disclosed position value at $580.6K.
0 of 7 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 Catherine S. Massie's linked filing trail.
Disclosed position value
Top 5
Catherine S. Massie
$580.6K
David F. Sykes
$526.7K
Peter H. Sykes
$545K
William A. Siskovic
$252.6K
Brian A. Staebler
$125K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-7 of 7 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Catherine S. Massie |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$580,642
299,471 shares
mixed-class rows
|
— | 30 Sep 2021 |
| David F. Sykes |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$526,706
272,503 shares
mixed-class rows
|
— | 30 Sep 2021 |
| Peter H. Sykes |
3/4/5
Former Director; exit report
|
—
class O/S missing
|
$545,006
272,503 shares
|
— | 31 Dec 2021 |
| William A. Siskovic |
3/4/5
Vice President of the Managing Member of the General Partner of Everflow Eastern Partners, L.P., Director
|
—
mixed-class rows
|
$252,637
157,128 shares
mixed-class rows
|
— | 31 Dec 2024 |
| Brian A. Staebler |
3/4/5
Officer, Director
|
—
mixed-class rows
|
$125,041
109,282 shares
mixed-class rows
|
$0 | 31 Dec 2025 |
| Thomas L. Korner |
3/4/5
Director
|
—
mixed-class rows
|
$122,215
84,672 shares
mixed-class rows
|
— | 31 Dec 2024 |
| Michael W. Rathburn |
3/4/5
Officer, Director
|
—
mixed-class rows
|
$74,060
70,660 shares
mixed-class rows
|
— | 31 Dec 2025 |
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. Net value: $0.
Buys
$13,200
Insiders: 1
Sells
$13,200
Insiders: 1
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 10,000
Shares: 10,000
| 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 | 10,000 | 10,000 | $13,200 | $13,200 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-7 of 7 reporting-owner rows connected to EVERFLOW EASTERN PARTNERS LP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
7
Largest Forms 3/4/5 holder
Catherine S. Massie
Net 12M change
$0
Latest report
31 Dec 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Catherine S. Massie | 10%+ Owner | $580,642 | Mixed | 30 Sep 2021 | ||
| Peter H. Sykes | Former Director; exit report | $545,006 | Mixed | 31 Dec 2021 | ||
| David F. Sykes | 10%+ Owner | $526,706 | Mixed | 30 Sep 2021 | ||
| William A. Siskovic | Vice President of the Managing Member of the General Partner of Everflow Eastern Partners, L.P., Director | $252,637 | Mixed | 31 Dec 2024 | ||
| Brian A. Staebler | Officer, Director | $125,041 | $0 | 0% | Mixed | 31 Dec 2025 |
| Thomas L. Korner | Director | $122,215 | Mixed | 31 Dec 2024 | ||
| Michael W. Rathburn | Officer, Director | $74,060 | Mixed | 31 Dec 2025 |
Recent insider transactions for EVERFLOW EASTERN PARTNERS LP
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Brian A. Staebler | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Small acquisition under Rule 16a-6 | 250 | 250 | 31 Aug 2025 | By Spot Energy LLC | ||||
| Michael W. Rathburn | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Small acquisition under Rule 16a-6 | 250 | 250 | 31 Aug 2025 | By Spot Energy LLC | ||||
| Michael W. Rathburn | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Options Exercise | 26.6% | 10,000 | 47,625 | 30 Jun 2025 | Direct | |||
| Michael W. Rathburn | Employee Unit Option (right to buy) | Options Exercise | 10,000 | 0 | 30 Jun 2025 | Direct | ||||
| Michael W. Rathburn | Employee Unit Option (right to buy) | Award | 10,000 | 10,000 | 30 Jun 2025 | Direct | ||||
| Brian A. Staebler | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Purchase | 13.1% | $13,200 | $1.32 | 10,000 | 86,246 | 30 Jun 2025 | By Tracie R. Staebler Revocable Trust (wife's trust) | |
| Brian A. Staebler | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Sale | -100% | $13,200 | $1.32 | -10,000 | 0 | 30 Jun 2025 | Direct | |
| Brian A. Staebler | Units of Ltd Prtnrshp Intrst of Everflow Eastern Partnrs, LP | Options Exercise | 10,000 | 10,000 | 30 Jun 2025 | Direct | ||||
| Brian A. Staebler | Employee Unit Option (right to buy) | Options Exercise | 10,000 | 0 | 30 Jun 2025 | Direct | ||||
| Brian A. Staebler | Employee Unit Option (right to buy) | Award | 10,000 | 10,000 | 30 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.