Mercer International Inc.
MERC- Exchange
- Nasdaq
- Industry
- Pulp Mills
- SEC CIK
- 0001333274
In the last 90 days, Mercer International Inc. insiders filed 1 open-market purchase and 0 sales; 67 institutions reported holding it in 13F filings for Q2 2026, worth $16.6M in total; no superinvestor holds it.
Holders of 5% or more of MERC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Mercer International Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Kellogg Peter R | 13D/A | 40.25%27.0M shares | +2.35 ppfrom 37.90% | Jul 23, 20254 filings | Jul 31, 2026 | SEC |
| Redwood Capital Management, LLC | 13G/A | 6.90%4.65M shares | +1.90 ppfrom 5.00% | Aug 14, 20252 filings | Nov 14, 2025 | SEC |
| Barclays PLC | 13G | 5.75%3.85M shares | New | May 14, 20261 filing | May 14, 2026 | SEC |
| Whitebox Advisors LLC | 13G | 5.40%3.59M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
13 Schedule 13D and 13G filings on Mercer International Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20264:10 PM ET | Whitebox Advisors LLCand 1 other | 13G | 5.40%3.59M shares | New | Aug 7, 2026 | SEC |
| Jul 31, 20268:01 PM ET | Kellogg Peter Rand 5 others | 13D/A | 40.25%27.0M shares | +2.35 ppfrom 37.90% | Jan 19, 2021 | SEC |
| May 21, 202610:14 AM ET | Kellogg Peter R | 13D/A | 37.90%24.5M shares | +1.40 ppfrom 36.50% | May 19, 2026 | SEC |
| May 14, 20269:26 PM ET | Barclays PLC | 13G | 5.75%3.85M shares | New | Mar 31, 2026 | SEC |
| Dec 9, 20258:16 PM ET | Kellogg Peter R | 13D/A | 36.50%24.5M shares | +1.40 ppfrom 35.10% | Nov 14, 2025 | SEC |
| Nov 14, 20257:34 PM ET | Redwood Capital Management, LLCand 4 others | 13G/A | 6.90%4.65M shares | +1.90 ppfrom 5.00% | Sep 30, 2025 | SEC |
| Nov 7, 20254:10 PM ET | Boundary Creek Advisors LPand 1 other | 13G/A | 0.00%0 shares | −6.00 ppfrom 6.00%Below 5% | Sep 30, 2025 | SEC |
| Aug 14, 20251:06 PM ET | Redwood Capital Management, LLCand 3 others | 13G | 5.00%3.37M shares | New | Jun 30, 2025 | SEC |
| Jul 23, 20258:50 PM ET | Kellogg Peter R | 13D/A | 35.10%23.5M shares | – | Jul 22, 2025 | SEC |
| May 13, 20252:25 PM ET | Boundary Creek Advisors LPand 1 other | 13G/A | 6.00%3.98M shares | – | Mar 31, 2025 | SEC |
| Apr 15, 202512:18 PM ET | Dimensional Fund Advisors LP | 13G/A | 4.80%3.21M shares | –Below 5% | Mar 31, 2025 | SEC |
| Feb 16, 2021 | Gates Capital Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Mercer International Inc. shares.
No Form 144 notices for Mercer International Inc. are on file.