Market Cap
$68.4M
MB
MBB
ISHARES TR
$89.78 ▲ +0.26%
Prev close $89.55Market cap$68.4M
25 New Institutional Positions9 Institutional Exits
Snapshot
The big-picture read on MBB right now — valuation, ownership and activity at a glance.
Cap Size
Micro Cap
Inst. Holders
50 funds
Inst. Value
$28.4B
Inst. Activity
25 buys / 9 sells
Congressional
4 trades
Price chart 30d -3.0%
Daily candles (open–high–low–close) with volume. Green = up day, red = down day.
No data for this timeframe.
Vol
Recent activity
The latest filings, insider trades, analyst actions, press and options flow — newest first.
Sep 18, 2026 short_volume
Short Volume: MBB — 88.3% short (3.3M / 3.7M)
Short: 3,300,067 | Exempt: 510 | TRF Vol: 3,737,182 | Short Ratio: 88.3% | Off-exchange volume (dark
Jun 30, 2026 Inst.
MML INVESTORS SERVICES, LLC — ADD
1,769,513 shares ($167.3M)
Jun 30, 2026 Inst.
GOLDMAN SACHS GROUP INC — DOUBLED
1,716,390 shares ($162.2M)
May 27, 2026 Congress
John Boozman buy
$1,001 - $15,000 — Senate
May 13, 2026 Congress
John Boozman sell
$1,001 - $15,000 — Senate
Upcoming & catalyst events
Scheduled dates plus disclosed catalysts — earnings, dividends, enforcement, FDA and clinical-trial events. Colored dot = impact.
Sep 18, 2026
short_volume
Short Volume: MBB — 88.3% short (3.3M / 3.7M)
Short: 3,300,067 | Exempt: 510 | TRF Vol: 3,737,182 | Short Ratio: 88.3% | Off-exchange volume (dark pool + OTC)
Sep 17, 2026
short_volume
Short Volume: MBB — 63.5% short (0.8M / 1.3M)
Short: 824,113 | Exempt: 1,960 | TRF Vol: 1,297,323 | Short Ratio: 63.5% | Off-exchange volume (dark pool + OTC)
Sep 15, 2026
short_volume
Short Volume: MBB — 59.7% short (1.2M / 2.0M)
Short: 1,182,113 | Exempt: 277 | TRF Vol: 1,979,312 | Short Ratio: 59.7% | Off-exchange volume (dark pool + OTC)
Sep 10, 2026
short_volume
Short Volume: MBB — 76.8% short (2.3M / 3.0M)
Short: 2,270,032 | Exempt: 1 | TRF Vol: 2,955,857 | Short Ratio: 76.8% | Off-exchange volume (dark pool + OTC)
Sep 9, 2026
short_volume
Short Volume: MBB — 66.4% short (0.5M / 0.8M)
Short: 511,635 | Exempt: 2 | TRF Vol: 770,731 | Short Ratio: 66.4% | Off-exchange volume (dark pool + OTC)
Institutional ownership
Which big funds own MBB (from quarterly 13F filings) and who is adding or trimming.
50 institutional holders with $28.4B total value (300,548,624 shares) as of 2026-Q2. Top holders: BANK, JPMORGAN, ENVESTNET. Net buying activity: 25 institutions added/increased vs 9 reduced.
Top holders — 2026-Q2
| Fund | Shares | Value | % Tracked | Last move |
|---|---|---|---|---|
| BANK OF AMERICA CORP /DE/ | 68,261,267 | $6.5B | 22.7% | — |
| JPMORGAN CHASE & CO | 37,776,202 | $3.6B | 12.6% | — |
| ENVESTNET ASSET MANAGEMENT INC | 30,910,875 | $2.9B | 10.3% | — |
| LPL Financial LLC | 27,128,190 | $2.6B | 9.0% | — |
| UBS Group AG | 18,496,926 | $1.7B | 6.2% | DOUBLED +1028.4% |
| TIAA Wealth Investment Management LLC | 14,805,333 | $1.4B | 4.9% | — |
| AMERIPRISE FINANCIAL INC | 13,686,305 | $1.3B | 4.5% | — |
| MORGAN STANLEY | 11,538,279 | $1.1B | 3.8% | — |
| TIAA-CREF INDIVIDUAL & INSTITUTIONAL SERVICES, LLC | 7,678,893 | $725.8M | 2.6% | — |
| TRUIST FINANCIAL CORP | 5,541,462 | $523.8M | 1.8% | ADD +46.8% |
Recent position changes
| Fund | Action | Prev | Current | Change | Value |
|---|---|---|---|---|---|
| MML INVESTORS SERVICES, LLC | ADD | 1,412,423 | 1,769,513 | +25.3% | $167.3M |
| GOLDMAN SACHS GROUP INC | DOUBLED | 302,215 | 1,716,390 | +467.9% | $162.2M |
| Mirae Asset Global Investments Co., Ltd. | ADD | 933,883 | 1,549,507 | +65.9% | $146.5M |
| MAI Capital Management | DOUBLED | 203,790 | 1,006,787 | +394.0% | $95.2M |
| Pathstone Holdings, LLC | DOUBLED | 18,729 | 812,942 | +4240.6% | $76.8M |
| Corient Private Wealth LP | ADD | 612,593 | 786,118 | +28.3% | $74.3M |
| State of New Jersey Common Pension Fund D | ADD | 450,000 | 700,000 | +55.6% | $66.2M |
| Capital International Investors | DOUBLED | 299,894 | 695,093 | +131.8% | $65.7M |
| OSAIC HOLDINGS, INC. | ADD | 512,270 | 675,822 | +31.9% | $63.9M |
| Mitsubishi UFJ Trust & Banking Corp | ADD | 295,766 | 399,026 | +34.9% | $37.7M |
Congressional trades
MBB trades disclosed by members of Congress, with disclosure delay.
1 members · 2 buys / 2 sells
| Date | Member | Party | Chamber | Type | Amount | Asset | Disclosed |
|---|---|---|---|---|---|---|---|
| May 27, 2026 | John Boozman | R | SENATE | BUY | $1,001 - $15,000 | iShares MBS ETF | Jun 16, 2026(21d) |
| May 13, 2026 | John Boozman | R | SENATE | SELL | $1,001 - $15,000 | iShares MBS ETF | Jun 16, 2026(35d) |
| Feb 6, 2026 | John Boozman | R | SENATE | SELL | $1,001 - $15,000 | iShares MBS ETF | Mar 6, 2026(29d) |
| Jan 23, 2026 | John Boozman | R | SENATE | BUY | $1,001 - $15,000 | iShares MBS ETF | Feb 15, 2026(24d) |
Short interest & halts
FINRA semi-monthly short positions, Reg SHO threshold status, and recent trading halts for MBB.
Shares short
6,572,541
Settlement Sep 15, 2026
Change vs prior
+98.3%
Semi-monthly cycle
Days to cover
2.5
At avg daily volume