I-MAB-SPONSORED ADR (IMAB) Institutional Ownership Changes & 13F Activity
I-MAB-SPONSORED ADR (IMAB). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Marshall Wace, Llp, Siren, L.L.C., Two Sigma Investments, Lp, Aihc Capital Management Ltd, and E Fund Management Co., Ltd..
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Citadel Advisors Llc | Buy | +456,215 | +273.8% | 622,831 | $1.21M | Q2 2026 | Sep 02, 2026 |
| Two Sigma Investments, Lp | Buy | +851,348 | — | 851,348 | $1.66M | Q2 2026 | Aug 14, 2026 |
| Woodline Partners Lp | Sell | -350,000 | -50.0% | 350,000 | $682.50K | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +62,885 | — | 62,885 | $122.63K | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +48,858 | +43.4% | 161,321 | $314.58K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Sell | -20,280 | -6.8% | 279,019 | $544.09K | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Buy | +18,343 | — | 18,343 | $35.77K | Q2 2026 | Aug 14, 2026 |
| Susquehanna International Group, Llp | Buy | +15,722 | +122.7% | 28,539 | $55.65K | Q2 2026 | Aug 14, 2026 |
| Two Sigma Securities, Llc | Buy | +15,641 | — | 15,641 | $30.50K | Q2 2026 | Aug 14, 2026 |
| Aigen Investment Management, Lp | Buy | +11,426 | — | 11,426 | $22.28K | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Buy | +2,661 | +11.2% | 26,468 | $51.61K | Q2 2026 | Aug 14, 2026 |
| Group One Trading Llc | Buy | +143 | — | 143 | $279.00 | Q2 2026 | Aug 14, 2026 |
| Osaic Holdings, Inc. | Buy | +30 | — | 30 | $58.00 | Q2 2026 | Aug 14, 2026 |
| Marshall Wace, Llp | Buy | +1,231,946 | — | 1,231,946 | $2.40M | Q2 2026 | Aug 13, 2026 |
| Siren, L.L.C. | Sell | -995,261 | -33.2% | 2,004,739 | $3.91M | Q2 2026 | Aug 13, 2026 |
| Aihc Capital Management Ltd | Buy | +615,100 | +27.2% | 2,878,033 | $5.61M | Q2 2026 | Aug 13, 2026 |
| Renaissance Technologies LLC | Buy | +485,814 | +178.3% | 758,226 | $1.48M | Q2 2026 | Aug 13, 2026 |
| Ubs Group Ag | Buy | +238,239 | +374.9% | 301,780 | $588.47K | Q2 2026 | Aug 13, 2026 |
| Morgan Stanley | Sell | -184,970 | -4.8% | 3,653,228 | $7.12M | Q2 2026 | Aug 13, 2026 |
| Headlands Technologies Llc | Buy | +65,183 | — | 65,183 | $127.11K | Q2 2026 | Aug 13, 2026 |
| Bnp Paribas Financial Markets | Sell | -44,266 | -60.6% | 28,836 | $56.23K | Q2 2026 | Aug 13, 2026 |
| Jpmorgan Chase & Co | Buy | +81,556 | — | 81,556 | $161.48K | Q2 2026 | Aug 12, 2026 |
| Simplex Trading, Llc | Buy | +1,967 | — | 1,967 | $3.83K | Q2 2026 | Aug 12, 2026 |
| E Fund Management Co., Ltd. | Buy | +589,020 | — | 589,020 | $1.15M | Q2 2026 | Aug 11, 2026 |
| Dimensional Fund Advisors Lp | Sell | -29,981 | -20.5% | 116,341 | $226.86K | Q2 2026 | Aug 11, 2026 |
| Tower Research Capital Llc (Trc) | Buy | +1,085 | +33.5% | 4,326 | $8.44K | Q2 2026 | Aug 11, 2026 |
| Blackrock, Inc. | Buy | +58,712 | +9.4% | 686,208 | $1.34M | Q2 2026 | Aug 07, 2026 |
| Sg Americas Securities, Llc | Buy | +38,198 | — | 38,198 | $74.00K | Q2 2026 | Aug 07, 2026 |
| State Street Corp | Sell | -9,731 | -2.6% | 360,376 | $702.73K | Q2 2026 | Aug 07, 2026 |
| Gf Fund Management Co. Ltd. | Buy | +56 | +2.4% | 2,377 | $4.63K | Q2 2026 | Aug 07, 2026 |
Frequently asked questions about IMAB activity
Which institutional owners are buying IMAB?
Institutional owners buying IMAB include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in IMAB activity?
"Buy" means an investor increased their reported position in IMAB compared to the prior reporting period. This reflects growing exposure to I-MAB-SPONSORED ADR (IMAB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in IMAB increasing?
Institutional interest in IMAB can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related IMAB Institutional Insights
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- IMAB Insider Trading & SEC Form 4 Activity
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