Zenas BioPharma, Inc.
ZBIO- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001953926
No open-market purchases or sales by Zenas BioPharma, Inc. insiders were filed in the last 90 days; 144 institutions reported holding it in 13F filings for Q2 2026, worth $1.55B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Zenas BioPharma, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 140
- +23 vs. Q4 2025
- Shares held
- 57.8M
- +16.4M (+39.7%) vs. Q4 2025
- Total value
- $1.14B
- −$353.3M (−23.6%) vs. Q4 2025
- New holders
- 51
- 58 more added
- Sold out
- 28
- 17 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ZBIO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 144 | $1.55B |
| Q1 2026 | 140 | $1.14B |
| Q4 2025 | 119 | $1.55B |
| Q3 2025 | 80 | $774.5M |
| Q2 2025 | 73 | $330.0M |
| Q1 2025 | 67 | $256.7M |
| Q4 2024 | 65 | $259.6M |
| Q3 2024 | 44 | $418.5M |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Zenas BioPharma, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Covestor Ltd | 6 | $0 | 0.00% | +6 | New |
| Essential Partners LLC | 2 | $39 | 0.00% | −1−33.3% | Reduced |
| True Wealth Design, LLC | 3 | $59 | 0.00% | 00.0% | Unchanged |
| Stone House Investment Management, LLC | 5 | $98 | 0.00% | +5 | New |
| Ameritas Advisory Services, LLC | 6 | $117 | 0.00% | +6 | New |
| Sunbelt Securities, Inc. | 11 | $215 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 12 | $235 | 0.00% | +5+71.4% | Added |
| Bare Financial Services, Inc | 14 | $274 | 0.00% | +14 | New |
| SBI Securities Co., Ltd. | 20 | $391 | 0.00% | +20 | New |
| Rothschild Investment LLC | 21 | $411 | 0.00% | +20+2,000.0% | Added |
| Cornerstone Financial Management LLC | 26 | $508 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 26 | $509 | 0.00% | −21−44.7% | Reduced |
| Caitong International Asset Management Co., Ltd | 60 | $1.17K | 0.00% | +60 | New |
| UMA Financial Services, Inc. | 92 | $1.80K | 0.00% | +25+37.3% | Added |
| Torren Management, LLC | 95 | $1.86K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 98 | $1.92K | 0.00% | +25+34.2% | Added |
| Fifth Third Bancorp | 107 | $2.09K | 0.00% | +107 | New |
| GAMMA Investing LLC | 245 | $4.79K | 0.00% | +66+36.9% | Added |
| Quantbot Technologies LP | 256 | $5.00K | 0.00% | +256 | New |
| J.Safra Asset Management Corp | 270 | $5.28K | 0.00% | +178+193.5% | Added |
| Larson Financial Group LLC | 293 | $5.73K | 0.00% | +274+1,442.1% | Added |
| Group One Trading, L.P. | 300 | $5.87K | 0.00% | +300 | New |
| Signaturefd, LLC | 370 | $7.23K | 0.00% | −19−4.9% | Reduced |
| Advisor Group Holdings, Inc. | 677 | $13.2K | 0.00% | +674+22,466.7% | Added |
| Sterling Capital Management LLC | 779 | $15.2K | 0.00% | −308−28.3% | Reduced |
| US Bancorp | 994 | $19.4K | 0.00% | +110+12.4% | Added |
| GF Fund Management Co. Ltd. | 1,205 | $23.6K | 0.00% | +151+14.3% | Added |
| Harbour Investments, Inc. | 1,370 | $26.8K | 0.00% | +1,370 | New |
| CWM, LLC | 1,472 | $28.8K | 0.00% | −706−32.4% | Reduced |
| Ameritas Investment Partners, Inc. | 1,924 | $37.6K | 0.00% | +556+40.6% | Added |
| Nisa Investment Advisors, LLC | 2,415 | $47.2K | 0.00% | +2,300+2,000.0% | Added |
| Russell Investments Group, Ltd. | 2,721 | $53.2K | 0.00% | +1,376+102.3% | Added |
| STRS Ohio | 2,800 | $54.7K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 2,800 | $54.7K | 0.00% | +192+7.4% | Added |
| KLP Kapitalforvaltning AS | 3,400 | $66.5K | 0.00% | 00.0% | Unchanged |
| Vanguard Investments Australia, Ltd. | 4,199 | $82.1K | 0.00% | +4,199 | New |
| The PNC Financial Services Group, Inc. | 4,767 | $93.2K | 0.00% | −1,057−18.1% | Reduced |
| New York State Common Retirement Fund | 6,200 | $121.2K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 6,363 | $124.4K | 0.00% | +1,864+41.4% | Added |
| Virtus Investment Advisers, Inc. | 6,717 | $131.3K | 0.04% | +163+2.5% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 6,777 | $132.5K | 0.00% | +6,777 | New |
| Tower Research Capital LLC (TRC) | 7,235 | $141.4K | 0.00% | +6,440+810.1% | Added |
| Wells Fargo & Company | 8,885 | $173.7K | 0.00% | −12,266−58.0% | Reduced |
| Citigroup Inc | 9,888 | $193.3K | 0.00% | +7,537+320.6% | Added |
| BNP Paribas Arbitrage, SA | 9,999 | $195.5K | 0.00% | +2,861+40.1% | Added |
| Legal & General Group Plc | 10,432 | $203.9K | 0.00% | −2,595−19.9% | Reduced |
| Vanguard Asset Management, Ltd | 10,642 | $208.1K | 0.00% | +10,642 | New |
| SEI Investments Co | 12,386 | $242.1K | 0.00% | +12,386 | New |
| Fox Run Management, L.L.C. | 13,331 | $243.0K | 0.04% | +13,331 | New |
| Creative Planning | 12,658 | $247.5K | 0.00% | +385+3.1% | Added |
| MetLife Investment Management | 12,909 | $252.4K | 0.00% | +2,809+27.8% | Added |
| Scientech Research LLC | 12,952 | $253.2K | 0.21% | +12,952 | New |
| China Universal Asset Management Co., Ltd. | 13,526 | $264.4K | 0.02% | +212+1.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 14,386 | $276.8K | 0.00% | +5,606+63.8% | Added |
| UBS Asset Management Americas Inc | 15,523 | $303.5K | 0.00% | +7,123+84.8% | Added |
| California State Teachers Retirement System | 15,819 | $309.3K | 0.00% | +118+0.8% | Added |
| Prelude Capital Management, LLC | 16,645 | $325.4K | 0.02% | +16,645 | New |
| CI Private Wealth, LLC | 16,845 | $329.3K | 0.00% | +16,845 | New |
| Schonfeld Strategic Advisors LLC | 17,638 | $344.8K | 0.00% | +8,511+93.3% | Added |
| Allstate Corp | 18,223 | $356.3K | 0.00% | +18,223 | New |
| Aquatic Capital Management LLC | 18,640 | $364.4K | 0.01% | +18,640 | New |
| Deutsche Bank AG | 19,266 | $376.6K | 0.00% | +6,485+50.7% | Added |
| XTX Topco Ltd | 19,311 | $377.5K | 0.01% | +7,128+58.5% | Added |
| State of Wisconsin Investment Board | 20,814 | $406.9K | 0.00% | +10,593+103.6% | Added |
| Vanguard Global Advisers, LLC | 20,840 | $407.4K | 0.00% | +20,840 | New |
| Quantinno Capital Management LP | 21,126 | $413.0K | 0.00% | +21,126 | New |
| Profund Advisors LLC | 21,416 | $418.7K | 0.02% | +21,416 | New |
| JPMorgan Chase & Co | 25,109 | $457.6K | 0.00% | +3,383+15.6% | Added |
| HRT Financial LP | 25,749 | $503.0K | 0.00% | +25,749 | New |
| Rhumbline Advisers | 26,813 | $524.2K | 0.00% | +4,867+22.2% | Added |
| Jacobs Levy Equity Management, Inc | 27,532 | $538.3K | 0.00% | +27,532 | New |
| Barclays PLC | 29,610 | $578.9K | 0.00% | −4,767−13.9% | Reduced |
| Voleon Capital Management LP | 29,612 | $578.9K | 0.01% | +19,425+190.7% | Added |
| Schroder Investment Management Group | 33,697 | $614.1K | 0.00% | −16,939−33.5% | Reduced |
| Swiss National Bank | 31,600 | $617.8K | 0.00% | 00.0% | Unchanged |
| J. Goldman & Co LP | 36,797 | $719.4K | 0.03% | +36,797 | New |
| Burkehill Global Management, LP | 40,000 | $782.0K | 0.04% | +40,000 | New |
| DAFNA Capital Management LLC | 42,500 | $830.9K | 0.19% | +42,500 | New |
| Squarepoint Ops LLC | 42,874 | $838.2K | 0.00% | +27,333+175.9% | Added |
| Alps Advisors Inc | 43,694 | $854.2K | 0.00% | −383−0.9% | Reduced |
| Rafferty Asset Management, LLC | 48,169 | $941.7K | 0.00% | +48,169 | New |
| AQR Capital Management LLC | 50,971 | $996.5K | 0.00% | −27,249−34.8% | Reduced |
| Jump Financial, LLC | 60,001 | $1.17M | 0.02% | +60,001 | New |
| Bank of New York Mellon Corp | 60,864 | $1.19M | 0.00% | +9,062+17.5% | Added |
| Citadel Advisors LLC | 66,870 | $1.31M | 0.00% | +42,411+173.4% | Added |
| Nuveen, LLC | 67,770 | $1.32M | 0.00% | +16,920+33.3% | Added |
| Birchview Capital, LP | 70,000 | $1.37M | 0.78% | +70,000 | New |
| Voloridge Investment Management, LLC | 77,493 | $1.51M | 0.01% | −55,946−41.9% | Reduced |
| Exome Asset Management LLC | 80,730 | $1.58M | 0.93% | +80,730 | New |
| Susquehanna International Group, LLP | 85,005 | $1.66M | 0.00% | +71,327+521.5% | Added |
| Morgan Stanley | 93,396 | $1.83M | 0.00% | −34,939−27.2% | Reduced |
| Seven Grand Managers, LLC | 100,000 | $1.96M | 0.13% | +100,000 | New |
| Atom Investors LP | 107,016 | $2.09M | 0.15% | +107,016 | New |
| Invesco Ltd. | 113,479 | $2.22M | 0.00% | −74,489−39.6% | Reduced |
| Walleye Capital LLC | 125,232 | $2.45M | 0.02% | +125,232 | New |
| Monashee Investment Management LLC | 150,000 | $2.93M | 1.60% | +150,000 | New |
| Maven Securities LTD | 150,000 | $2.93M | 0.17% | +150,000 | New |
| SEB Asset Management AB | 163,860 | $3.20M | 0.01% | +163,860 | New |
| Vanguard Fiduciary Trust Co | 179,388 | $3.51M | 0.00% | +179,388 | New |
| Northern Trust Corp | 194,640 | $3.81M | 0.00% | +39,274+25.3% | Added |