Logo
Login
$MTNB
$1.91 +$0.08 (4.37%) Close

Ownership

13F as of Q2 2026 · 980.0K shares outstanding

Who owns MTNB?

By type of holder
Institutions 31.5% Insiders 21.8% Everyone else 46.7%
Concentration Top 10 holders own 3796.4%
Robert J. Eide 1724.1% · Pembroke & Partners LLC 1723.9%
Institutional ownership
31.5%
-4.6 pts vs last qtr
Institutional holders
24
-4 vs last qtr
Net shares bought
−45.4K
by institutions in Q2 2026
New / sold out
2 / 6
positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026
  • Renaissance Technologies LLC +42.5K
  • BlackRock, Inc. +612

Sign up to see all 5.

Biggest sellers in Q2 2026
  • Citadel Advisors LLC −36.2K
  • XTX Topco Ltd SOLD OUT −20.7K

Sign up to see all 5.

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Matinas BioPharma Holdings Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2022–FY2025
+23.7%
+7.35% a year
Each share's claim on the business
−19.2%
shrank without buying or selling a share
Spent on buybacks vs paid in stock
— vs $14.4M
over 4 fiscal years
Diluted shares, split-adjusted
4.2M4.9M5.5M2022: 4.4M shares'222023: 4.3M shares'232024: 4.9M shares'242025: 5.5M shares'25
Buybacks Stock-based comp
$0$2.6M$5.2M2022 buybacks: $02022 stock comp: $5.2M'222023 buybacks: $02023 stock comp: $4.9M'232024 buybacks: $02024 stock comp: $3.2M'242025 buybacks: $02025 stock comp: $1.0M'25

How patient are the owners?

Institutional shares by how long they've been held
5+ years0% 3–5 years0% 1–3 years95% Under 1 year5%
Quarterly turnover
18.6%
of institutional shares changed hands
Top 10 managers, median time held
1.8 years

Super Investors

Investment managers reporting MTNB on Form 13F
RT
Renaissance Technologies LLC
Shares
71.0K
% of company
7.25%
Change vs last qtr
+42.5K (+148.7%)
Held since
2024
GC
Geode Capital Management, LLC
Shares
49.1K
% of company
5.01%
Change vs last qtr
−16.0K (−24.6%)
Held since
2024

27 more super investors behind a free account

See every manager holding Matinas BioPharma Holdings Inc, how their position has changed, and how long they've held it.

Sign up free

Institutional Funds

Mutual funds and ETFs reporting MTNB on Form N-PORT; together they hold 8.9% of the company
VE
Vanguard Extended Market Index Fund
Vanguard Index Funds
Position value
$24.5K
% of company
4.09%
% of the fund
0.00%
As of
June 30, 2026
FE
Fidelity Extended Market Index Fund
Fidelity Concord Street Trust
Position value
$6.52K
% of company
3.37%
% of the fund
0.00%
As of
August 31, 2026

2 more funds behind a free account

See every fund holding Matinas BioPharma Holdings Inc and how much of the fund the position is.

Sign up free

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G
RJ
Robert J. Eide
5%+ holder13D · 10.0%
Shares
16.9M
% of company
1724.05%
Change vs last qtr
—
Held since
—
PP
Pembroke & Partners LLC
5%+ holder13D · 10.0%
Shares
16.9M
% of company
1723.90%
Change vs last qtr
—
Held since
—

2 more holders behind a free account

See every insider and 5%+ holder of Matinas BioPharma Holdings Inc.

Sign up free

Create Account

Sign up for free to unlock this feature.

Already have an account? Sign in

Premium Feature

This feature requires a premium subscription to unlock unlimited historical data and advanced analysis tools.

Premium includes:

  • Unlimited historical financial data
  • Advanced analytics and insights
  • Priority support
View Pricing Plans