Matinas BioPharma Holdings, Inc.
MTNB- Exchange
- NYSE
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001582554
No open-market purchases or sales by Matinas BioPharma Holdings, Inc. insiders were filed in the last 90 days; 25 institutions reported holding it in 13F filings for Q2 2026, worth $199.2K in total; no superinvestor holds it.
Holders of 5% or more of MTNB
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Matinas BioPharma Holdings, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Sanitam Partners LLC | 13D/A | 9.99%17.1M shares | −14.11 ppfrom 24.10% | Feb 21, 20252 filings | Apr 10, 2025 | SEC |
| Pembroke & Partners LLC | 13D/A | 9.99%16.9M shares | −10.01 ppfrom 20.00% | Feb 21, 20252 filings | Apr 10, 2025 | SEC |
| Lazar David E. | 13G | 9.81%545.0K shares | New | Aug 19, 20251 filing | Aug 19, 2025 | 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
10 Schedule 13D and 13G filings on Matinas BioPharma Holdings, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 14, 202510:45 AM ET | Highbridge Capital Management LLC | 13G/A | 0.00%0 shares | −8.40 ppfrom 8.40%Below 5% | Sep 30, 2025 | SEC |
| Sep 25, 20253:52 PM ET | Hezbay Holdings LLCand 1 other | 13D/A | 4.99%253.8K shares | –Below 5% | Sep 25, 2025 | SEC |
| Aug 19, 202512:03 PM ET | Lazar David E. | 13G | 9.81%545.0K shares | New | Aug 15, 2025 | SEC |
| Aug 14, 20254:06 PM ET | Highbridge Capital Management LLC | 13G/A | 8.40%466.7K shares | – | Jun 30, 2025 | SEC |
| Apr 10, 20255:14 PM ET | Sanitam Partners LLCand 5 others | 13D/A | 9.99%17.1M shares | −14.11 ppfrom 24.10% | Apr 8, 2025 | SEC |
| Apr 10, 20251:44 PM ET | Pembroke & Partners LLCand 1 other | 13D/A | 9.99%16.9M shares | −10.01 ppfrom 20.00% | Apr 8, 2025 | SEC |
| Feb 21, 20253:11 PM ET | Pembroke & Partners LLCand 1 other | 13D | 20.00%1.02M shares | New | Feb 13, 2025 | SEC |
| Feb 21, 20253:07 PM ET | Sanitam Partners LLCand 5 others | 13D | 24.10%1.23M shares | New | Feb 13, 2025 | SEC |
| Feb 19, 20252:22 PM ET | 111 Equity Groupand 1 other | 13D/A | 3.61%183.6K shares | −1.56 ppfrom 5.17%Below 5% | Feb 13, 2025 | SEC |
| Jan 6, 20254:57 PM ET | 111 Equity Groupand 1 other | 13D | 5.17%263.0K shares | New | Jan 2, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Matinas BioPharma Holdings, Inc. shares.
No Form 144 notices for Matinas BioPharma Holdings, Inc. are on file.