Security key
61218C103
Montauk Renewables, Inc. - Common Stock (MNTK)
CUSIP: 61218C103
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 9,238,755
- Total 13F value
- $14,415,634
- Share change
- +560,836
- SEC-reported price per share
- $1.56
- Number of holders
- 33
- Value change
- +$895,722
- Number of buys
- 18
- Number of sells
- 8
- Shares outstanding
- 142,023,490
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
33
Top holders
10
MNTK full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q1 2026
Montauk Renewables, Inc. SEC filings
Montauk Renewables, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 61218C103
Recent filing periods:
Ownership snapshot
Top reported holders of MNTK - Montauk Renewables, Inc. - Common Stock (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
Aktiv Investment Manageme...
Disclosed value leader
Aktiv Investment Manageme...
Comparable rows
15/15
Latest evidence
11 May 2026
3/4/5
13D/G
13F
Lead comparable stake: 16%
13D/G row: Aktiv Investment Management (Pty) Ltd
Showing 1-6 of 15 holder rows.
Quick read
Aktiv Investment Management (Pty) Ltd leads the comparable SEC ownership view at 16%.
15 of 15 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 Aktiv Investment Management (Pty) Ltd's linked filing trail.
Comparable ownership
Top 5
Aktiv Investment Management (Pty)...
16%
Peresec Prime Brokers (Pty) Ltd
0.03%
Sharon R. Frank
0.03%
John A. Copelyn
0.01%
BlackRock, Inc.
3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Aktiv Investment Management (Pty) Ltd |
3/4/5
13D/G
10%+ Owner
|
16%
from 13D/G
|
$44,818,553
22,297,788 shares
|
— | 03 Nov 2025 |
| Peresec Prime Brokers (Pty) Ltd |
13D/G
|
0.03%
|
$72,231
35,936 shares
|
$0 | 21 Nov 2025 |
| Sharon R. Frank |
3/4/5
VP Environ Health & Safety
|
0.03%
|
$65,589
39,275 shares
|
— | 24 Nov 2025 |
| John A. Copelyn |
3/4/5
Director
|
0.01%
|
$25,383
17,506 shares
|
+$25,384 | 11 May 2026 |
| BlackRock, Inc. |
13F
Company
|
3%
|
$4,851,846
4,218,997 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
1.9%
|
$3,092,021
2,688,714 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.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
33
Shares
9,238,755
Rows available
33
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
93
Q2 2026 holders
33
Holder diff
-60
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend