MTNB
Matinas BioPharma Holdings, Inc.Company with tickers: MTNB
CIK
1582554
CUSIP
576810303
Shares Outstanding
6,406,191
13F Activity (30d)
22 filings
22 filers
Holders: 28
Total Value: $177,178
Total Shares: 354,364
Institutional Ownership Trend
Holder Concentration
Across 28 13F filers · Δ vs Dec 31, 2025Top Holder
18.4%
+3.5 pts
Top 5
67.5%
+4.8 pts
Top 10
94.9%
+6.1 pts
HHI
1,134
Broadly held
+155
Quarterly Activity
vs Dec 31, 2025
New
5
Increased
2
Decreased
7
Sold Out
7
Unchanged
14
Holder count:
-2
Institutional value:
-31.7%
Shares held:
-19.9%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | +9,200 | 65,170 | |
| Mid XTX Topco Ltd | +3,797 | 20,706 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega CITADEL ADVISORS LLC | −14,036 | 51,698 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | −6,785 | 14,328 | |
| Mega UBS Group AG | −423 | 184 | |
| Mid Farther Finance Advisors, LLC | −417 | 5 | |
| Large RENAISSANCE TECHNOLOGIES LLC | −400 | 28,570 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 40,110 | $20,055 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 18,277 | $9,138 | |
| Mega Vanguard Global Advisers, LLC | 1,338 | $669 | |
| Mega FMR LLC | 7 | $3 | |
| Mid Bogart Wealth, LLC | 2 | $1 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 59,725 | $34,998 | |
| Mid DRW Securities, LLC | 46,374 | $27,175 | |
| Mega JANE STREET GROUP, LLC | 15,899 | $9,316 | |
| Mid Virtu Financial LLC | 15,569 | $9,123 | |
| Mega BANK OF AMERICA CORP /DE/ | 991 | $580 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | $32,584 | 18.39% | 65,170 | Shares | Defined | 2026-05-15 | ||||
| Mega CITADEL ADVISORS LLC | $25,849 | 14.59% | 51,698 | Shares | Defined | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $24,825 | 14.01% | 49,650 | Shares | Sole | 2026-05-13 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $20,055 | 11.32% | 40,110 | Shares | Defined | 2026-05-08 | ||||
| Micro Holos Integrated Wealth LLC | $16,240 | 9.17% | 32,480 | Shares | Sole | 2026-04-08 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $14,285 | 8.06% | 28,570 | Shares | Sole | 2026-05-14 | ||||
| Mid XTX Topco Ltd | $10,353 | 5.84% | 20,706 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $9,138 | 5.16% | 18,277 | Shares | Defined | 2026-05-08 | ||||
| Mega STATE STREET CORP | $7,661 | 4.32% | 15,322 | Shares | Defined | 2026-05-15 | ||||
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $7,164 | 4.04% | 14,328 | Shares | Other | 2026-05-15 | ||||
| Small Sargent Investment Group, LLC | $6,360 | 3.59% | 12,720 | Shares | Sole | 2026-05-11 | ||||
| Mid Tower Research Capital LLC (TRC) | $1,426 | 0.80% | 2,853 | Shares | Defined | 2026-05-15 | ||||
| Mega Vanguard Global Advisers, LLC | $669 | 0.38% | 1,338 | Shares | Defined | 2026-05-08 | ||||
| Mega MORGAN STANLEY | $172 | 0.10% | 344 | Shares | Defined | 2026-05-15 | ||||
| Small Costello Asset Management, INC | $100 | 0.06% | 200 | Shares | Sole | 2026-04-30 | ||||
| Mega UBS Group AG | $92 | 0.05% | 184 | Shares | Defined | 2026-05-05 | ||||
| Mega WELLS FARGO & COMPANY/MN | $51 | 0.03% | 102 | Shares | Defined | 2026-05-11 | ||||
| Large Steward Partners Investment Advisory, LLC | $30 | 0.02% | 61 | Shares | Sole | 2026-05-08 | ||||
| Mid EverSource Wealth Advisors, LLC | $30 | 0.02% | 60 | Shares | Sole | 2026-05-18 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $30 | 0.02% | 60 | Shares | Sole | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $25 | 0.01% | 50 | Shares | Defined | 2026-05-15 | ||||
| Micro VISION FINANCIAL MARKETS LLC | $20 | 0.01% | 40 | Shares | Sole | 2026-04-24 | ||||
| Mid ROTHSCHILD INVESTMENT LLC | $7 | 0.00% | 14 | Shares | Sole | 2026-05-07 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $5 | 0.00% | 11 | Shares | Defined | 2026-04-28 | ||||
| Mega FMR LLC | $3 | 0.00% | 7 | Shares | Defined | 2026-05-15 | ||||
| Mid Farther Finance Advisors, LLC | $2 | 0.00% | 5 | Shares | Sole | 2026-04-07 | ||||
| Mid Bogart Wealth, LLC | $1 | 0.00% | 2 | Shares | Sole | 2026-04-28 | ||||
| Mid MAI Capital Management | $1 | 0.00% | 2 | Shares | Sole | 2026-05-15 | ||||
| No holders match your search. | ||||||||||