IMAB Institutional Ownership & Shareholders
I-MAB-SPONSORED ADR (IMAB) is currently held by 49 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $62.17M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Janus Henderson Group Plc is currently the largest disclosed institutional shareholder of IMAB tracked by InsiderSet, reporting ownership valued at approximately $14.81M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $27.93M, representing an estimated gain of +88.59% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 85% of the total disclosed IMAB value among the investors covered in this analysis. Major shareholders include Janus Henderson Group Plc, Hhlr Advisors, Ltd., Morgan Stanley, and several other long-term asset managers with concentrated positions in I-MAB-SPONSORED ADR (IMAB).
This page ranks the largest institutional IMAB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
49
Total Reported Value
$62.17M
Largest Holder
Janus Henderson Group Plc
Largest Position
$14.81M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
73
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Janus Henderson Group Plc | 0.01% | 6,032,650 | $14,810,156 | $27,931,170 | +$13,121,014 | +88.59% | |
| Hhlr Advisors, Ltd. | 1.40% | 5,980,568 | $11,662,108 | $27,690,030 | +$16,027,922 | +137.44% | |
| Morgan Stanley | 0.00% | 3,653,228 | $7,123,795 | $16,914,446 | +$9,790,651 | +137.44% | |
| Aihc Capital Management Ltd | 5.38% | 2,878,033 | $5,612,164 | $13,325,293 | +$7,713,129 | +137.44% | |
| Siren, L.L.C. | 0.08% | 2,004,739 | $3,909,241 | $9,281,942 | +$5,372,701 | +137.44% | |
| Marshall Wace, Llp | 0.00% | 1,231,946 | $2,402,292 | $5,703,910 | +$3,301,618 | +137.44% | |
| Candriam S.C.A. | 0.01% | 1,132,563 | $2,206,373 | $5,243,767 | +$3,037,394 | +137.66% | |
| Adage Capital Partners Gp, L.L.C. | 0.00% | 1,000,000 | $1,950,000 | $4,630,000 | +$2,680,000 | +137.44% | |
| Two Sigma Investments, Lp | 0.00% | 851,348 | $1,660,129 | $3,941,741 | +$2,281,612 | +137.44% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 758,226 | $1,478,541 | $3,510,586 | +$2,032,045 | +137.44% |
| Blackrock, Inc. | 0.00% | 686,208 | $1,338,105 | $3,177,143 | +$1,839,038 | +137.44% | |
| Citadel Advisors Llc | 0.00% | 622,831 | $1,214,520 | $2,883,708 | +$1,669,188 | +137.44% | |
| E Fund Management Co., Ltd. | 0.03% | 589,020 | $1,148,589 | $2,727,163 | +$1,578,574 | +137.44% | |
| Exome Asset Management Llc | 0.69% | 576,960 | $1,125,072 | $2,671,325 | +$1,546,253 | +137.44% | |
| State Street Corp | 0.00% | 360,376 | $702,733 | $1,668,541 | +$965,808 | +137.44% | |
| Woodline Partners Lp | 0.00% | 350,000 | $682,500 | $1,620,500 | +$938,000 | +137.44% | |
| Fiera Capital Corp | 0.00% | 315,681 | $615,578 | $1,461,603 | +$846,025 | +137.44% | |
| Ubs Group Ag | 0.00% | 301,780 | $588,471 | $1,397,241 | +$808,770 | +137.44% | |
| Barclays Plc | 0.00% | 279,019 | $544,087 | $1,291,858 | +$747,771 | +137.44% | |
| Taikang Asset Management (Hong Kong) Co Ltd | 0.03% | 170,931 | $333,315 | $791,411 | +$458,096 | +137.44% | |
| Goldman Sachs Group Inc | 0.00% | 161,321 | $314,576 | $746,916 | +$432,340 | +137.44% | |
| Alps Advisors Inc | 0.00% | 117,096 | $228,337 | $542,154 | +$313,817 | +137.44% | |
| Dimensional Fund Advisors Lp | 0.00% | 116,341 | $226,864 | $538,659 | +$311,795 | +137.44% | |
| Jpmorgan Chase & Co | 0.00% | 81,556 | $161,481 | $377,604 | +$216,123 | +133.84% | |
| Geode Capital Management, Llc | 0.00% | 68,849 | $134,255 | $318,771 | +$184,516 | +137.44% | |
| Headlands Technologies Llc | 0.01% | 65,183 | $127,107 | $301,797 | +$174,690 | +137.44% | |
| Invesco Ltd. | 0.00% | 62,885 | $122,626 | $291,158 | +$168,532 | +137.44% | |
| Sg Americas Securities, Llc | 0.00% | 38,198 | $74,000 | $176,857 | +$102,857 | +139.00% | |
| Bnp Paribas Financial Markets | 0.00% | 28,836 | $56,230 | $133,511 | +$77,281 | +137.44% | |
| Susquehanna International Group, Llp | 0.00% | 28,539 | $55,651 | $132,136 | +$76,485 | +137.44% | |
| Squarepoint Ops Llc | 0.00% | 26,468 | $51,613 | $122,547 | +$70,934 | +137.43% | |
| Jane Street Group, Llc | 0.00% | 18,343 | $35,769 | $84,928 | +$49,159 | +137.43% | |
| Two Sigma Securities, Llc | 0.00% | 15,641 | $30,500 | $72,418 | +$41,918 | +137.44% | |
| China Universal Asset Management Co., Ltd. | 0.00% | 20,480 | $28,058 | $94,822 | +$66,764 | +237.95% | |
| Aigen Investment Management, Lp | 0.01% | 11,426 | $22,281 | $52,902 | +$30,621 | +137.43% | |
| Bronte Capital Management Pty Ltd. | 0.00% | 11,192 | $21,824 | $51,819 | +$29,995 | +137.44% | |
| Freestone Capital Holdings, Llc | 0.00% | 10,000 | $19,500 | $46,300 | +$26,800 | +137.44% | |
| Tower Research Capital Llc (Trc) | 0.00% | 4,326 | $8,436 | $20,029 | +$11,593 | +137.43% | |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | 5,736 | $7,830 | $26,558 | +$18,728 | +239.18% | |
| Citigroup Inc | 0.00% | 2,690 | $5,246 | $12,455 | +$7,209 | +137.41% | |
| Pnc Financial Services Group, Inc. | 0.00% | 2,000 | $3,900 | $9,260 | +$5,360 | +137.44% | |
| Simplex Trading, Llc | 0.00% | 1,967 | $3,835 | $9,107 | +$5,272 | +137.48% | |
| Gf Fund Management Co. Ltd. | 0.00% | 2,588 | $3,533 | $11,982 | +$8,449 | +239.16% | |
| Jones Financial Companies Lllp | 0.00% | 1,104 | $1,811 | $5,112 | +$3,301 | +182.25% | |
| Sbi Securities Co., Ltd. | 0.00% | 1,070 | $1,461 | $4,954 | +$3,493 | +239.09% | |
| Group One Trading Llc | 0.00% | 143 | $279 | $662 | +$383 | +137.31% | |
| Caitong International Asset Management Co., Ltd | 0.00% | 177 | $242 | $820 | +$578 | +238.64% | |
| Rhumbline Advisers | 0.00% | 33 | $64 | $153 | +$89 | +138.73% | |
| Osaic Holdings, Inc. | 0.00% | 30 | $58 | $139 | +$81 | +139.48% | |
| Eurizon Capital Sgr S.P.A. | 0.00% | 1 | $2 | $5 | +$3 | +131.50% |
Frequently asked questions about IMAB
Who are the largest institutional holders of IMAB?
The largest institutional holders of IMAB reported in the latest SEC Form 13F filings include Janus Henderson Group Plc, Hhlr Advisors, Ltd., Morgan Stanley, Aihc Capital Management Ltd, and Siren, L.L.C.. InsiderSet ranks institutional holders by their latest reported IMAB position.
What is IMAB institutional ownership?
This page tracks IMAB positions reported by institutional investment managers through SEC Form 13F. I-MAB-SPONSORED ADR (IMAB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own IMAB?
InsiderSet currently tracks 49 institutional managers reporting IMAB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of IMAB shareholders.
How much IMAB stock do institutions own?
Institutional investment managers disclosed approximately $62.17M in IMAB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was IMAB institutional ownership last updated?
The latest IMAB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional IMAB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its IMAB position after the reporting date.
Are institutions buying or selling IMAB?
Institutional buying and selling can be analyzed by comparing IMAB positions across consecutive 13F reporting periods. InsiderSet's IMAB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View IMAB ownership changes.
How has IMAB institutional ownership changed over time?
InsiderSet tracks IMAB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.