IBIO · Insider trading · 13F holders · Congress trades
Ibio Inc (IBIO)
Who is buying and selling IBIO: 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
- 5
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
IBIO at a glance
- No open-market insider purchases or sales of IBIO were filed in the last 90 days.
- 5 13F filers hold IBIO among their 50 largest positions, worth $18.1M combined. The biggest bets by portfolio weight are Ally Bridge Group (NY) LLC (0.9%), Silverarc Capital Management, LLC (0.7%) and Cormorant Asset Management, LP (0.3%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
- No member of Congress has disclosed a trade in IBIO.
IBIO insider trading
No open-market insider purchases or sales of IBIO were filed in the last 90 days.
Who owns IBIO? Hedge funds and superinvestors
5 13F filers hold IBIO among their 50 largest positions, worth $18.1M combined. The biggest bets by portfolio weight are Ally Bridge Group (NY) LLC (0.9%), Silverarc Capital Management, LLC (0.7%) and Cormorant Asset Management, LP (0.3%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Cormorant Asset Management, LPHedge fund | 0.3% | $6.2M | 3,570,000 | New | Q2 2026 |
| Silverarc Capital Management, LLCHedge fund | 0.7% | $6.2M | 3,520,490 | — | Q2 2026 |
| Frazier Life Sciences Management, L.P.Hedge fund | 0.1% | $3.4M | 1,953,467 | +0.0% shares | Q2 2026 |
| Sio Capital Management, LLCHedge fund | 0.3% | $1.6M | 904,268 | — | Q2 2026 |
| Ally Bridge Group (NY) LLCHedge fund | 0.9% | $683K | 390,147 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 5). Screen IBIO in the grand portfolio →
IBIO stock trades by members of Congress
No member of Congress has disclosed a trade in IBIO.
IBIO questions and answers
Are insiders buying IBIO stock?
No open-market insider purchases or sales of IBIO were filed in the last 90 days.
Which hedge funds own IBIO?
5 13F filers hold IBIO among their 50 largest positions, worth $18.1M combined. The biggest bets by portfolio weight are Ally Bridge Group (NY) LLC (0.9%), Silverarc Capital Management, LLC (0.7%) and Cormorant Asset Management, LP (0.3%). In their latest 13Fs, 2 managers opened a new position and 0 added to one.
Has Congress traded IBIO?
No member of Congress has disclosed a trade in IBIO.
Who is the largest holder of IBIO?
Among 13F filers, Cormorant Asset Management, LP reports the largest IBIO position, $6.2M (3,570,000 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Ally Bridge Group (NY) LLC's: 0.9% of its portfolio.
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