IMBXF · Insider trading · 13F holders · Congress trades
iShares US Mortgage Backed Securities UC (IMBXF)
Who is buying and selling IMBXF: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 1
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
IMBXF at a glance
- No open-market insider purchases or sales of IMBXF were filed in the last 90 days.
- 1 13F filer hold IMBXF among their 50 largest positions, worth $20.7M combined. The biggest bets by portfolio weight are Sierra Capital LLC (2.0%).
- No member of Congress has disclosed a trade in IMBXF.
IMBXF insider trading
No open-market insider purchases or sales of IMBXF were filed in the last 90 days.
Who owns IMBXF? Hedge funds and superinvestors
1 13F filer hold IMBXF among their 50 largest positions, worth $20.7M combined. The biggest bets by portfolio weight are Sierra Capital LLC (2.0%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Sierra Capital LLCWealth manager | 2.0% | $20.7M | 3,694,383 | -0.8% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 1). Screen IMBXF in the grand portfolio →
IMBXF stock trades by members of Congress
No member of Congress has disclosed a trade in IMBXF.
IMBXF questions and answers
Are insiders buying IMBXF stock?
No open-market insider purchases or sales of IMBXF were filed in the last 90 days.
Which hedge funds own IMBXF?
1 13F filer hold IMBXF among their 50 largest positions, worth $20.7M combined. The biggest bets by portfolio weight are Sierra Capital LLC (2.0%).
Has Congress traded IMBXF?
No member of Congress has disclosed a trade in IMBXF.
Who is the largest holder of IMBXF?
Among 13F filers, Sierra Capital LLC reports the largest IMBXF position, $20.7M (3,694,383 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Sierra Capital LLC's: 2.0% of its portfolio.
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