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ZBIO Insider Trading

Insider Ownership Percentage: 16.50%
Insider Buying (Last 12 Months): $21,375,348.40
Insider Selling (Last 12 Months): $0.00

Zenas BioPharma Insider Trading History Chart

This chart shows the insider buying and selling history at Zenas BioPharma by year and by quarter.

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Zenas BioPharma Share Price & Price History

Current Price: $22.30
Price Change: ▼ Price Decrease of -1.07 (-4.58%)
As of 03/20/2026 05:00 PM ET

This chart shows the closing price history over time for ZBIO up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Zenas BioPharma Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
2/13/2026Patricia L. AllenDirectorBuy4,160$26.36$109,657.6019,860View SEC Filing Icon  
2/12/2026Patricia L. AllenDirectorBuy15,700$24.85$390,145.0015,700View SEC Filing Icon  
2/11/2026Hongbo LuDirectorBuy25,985$22.50$584,662.50347,968View SEC Filing Icon  
2/2/2026O Moulder JrCEOBuy57,000$17.96$1,023,720.00423,155View SEC Filing Icon  
1/9/2026O Moulder JrCEOBuy20,000$16.55$331,000.00366,155View SEC Filing Icon  
1/8/2026O Moulder JrCEOBuy30,000$16.30$489,000.00346,155View SEC Filing Icon  
1/7/2026O Moulder JrCEOBuy50,000$16.38$819,000.00316,155View SEC Filing Icon  
10/9/2025Jason Raleigh NunnDirectorBuy63,158$19.00$1,200,002.001,173,395View SEC Filing Icon  
10/9/2025Patrick G. EnrightDirectorBuy11,990$20.85$249,991.5011,990View SEC Filing Icon  
10/9/2025Patrick G. EnrightDirectorBuy105,265$19.00$2,000,035.001,832,669View SEC Filing Icon  
10/9/2025Sr One Capital Management, LlcMajor ShareholderBuy126,315$19.00$2,399,985.001,917,895View SEC Filing Icon  
10/7/2025Fairmount Funds Management LlcDirectorBuy316,219$19.00$6,008,161.002,209,025View SEC Filing Icon  
10/7/2025Hongbo LuDirectorBuy263,160$19.00$5,000,040.00321,983View SEC Filing Icon  
10/7/2025O Moulder JrInsiderBuy36,928$20.85$769,948.8036,928View SEC Filing Icon  
9/13/2024Hongbo LuDirectorBuy58,823$17.00$999,991.0058,823View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Zenas BioPharma (NASDAQ:ZBIO)

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at ZBIO by year and by quarter.

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Zenas BioPharma Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
2/19/2026Invesco Ltd.187,968$6.83M0.0%+28.9%0.350%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd12,183$0.44M0.0%N/A0.023%Search for SEC Filing on Google Icon
2/18/2026VARCOV Co.7,335$0.27M0.1%N/A0.014%Search for SEC Filing on Google Icon
2/18/2026Voloridge Investment Management LLC133,439$4.85M0.0%N/A0.249%Search for SEC Filing on Google Icon
2/18/2026Virtus Investment Advisers LLC6,554$0.24M0.1%N/A0.012%Search for SEC Filing on Google Icon
2/18/2026Superstring Capital Management LP83,353$3.03M1.6%-13.8%0.155%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC49,160$1.79M0.0%-31.6%0.092%Search for SEC Filing on Google Icon
2/18/2026Janus Henderson Group PLC7,900$0.29M0.0%N/A0.015%Search for SEC Filing on Google Icon
2/18/2026EcoR1 Capital LLC789,500$28.67M1.3%N/A1.471%Search for SEC Filing on Google Icon
2/18/2026Eversept Partners LP121,016$4.39M0.2%-23.8%0.225%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.193,153$7.01M0.0%N/A0.360%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC9,127$0.33M0.0%N/A0.017%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC78,220$2.84M0.0%+218.2%0.146%Search for SEC Filing on Google Icon
2/17/2026NEA Management Company LLC3,523,219$127.93M6.5%+28.9%6.563%Search for SEC Filing on Google Icon
2/17/2026ArrowMark Colorado Holdings LLC751,161$27.28M0.6%-8.9%1.399%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD369,248$13.41M0.0%-1.3%0.688%Search for SEC Filing on Google Icon
2/17/2026Rock Springs Capital Management LP502,077$18.23M0.9%-13.5%0.935%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System15,701$0.57M0.0%+1,271.3%0.029%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board10,221$0.37M0.0%N/A0.019%Search for SEC Filing on Google Icon
2/17/2026Polar Capital Holdings Plc1,057,609$38.40M0.1%N/A1.970%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC15,541$0.56M0.0%N/A0.029%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC7,676$0.28M0.0%N/A0.014%Search for SEC Filing on Google Icon
2/16/2026NEXTBio Capital Management LP321,983$11.69M6.9%N/A0.600%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC34,377$1.25M0.0%+50.3%0.064%Search for SEC Filing on Google Icon
2/13/2026Marshall Wace LLP7,100$0.26M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 6,256$0.23M0.0%N/A0.012%Search for SEC Filing on Google Icon
2/13/2026Pivotal bioVenture Partners Investment Advisor LLC591,991$21.50M8.3%-24.0%1.103%Search for SEC Filing on Google Icon
2/13/2026Vivo Capital LLC853,495$30.99M2.0%-27.9%1.590%Search for SEC Filing on Google Icon
2/13/2026Schroder Investment Management Group50,636$1.85M0.0%-55.0%0.094%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.213,193$7.74M0.0%+19.5%0.397%Search for SEC Filing on Google Icon
2/13/2026State Street Corp438,294$15.91M0.0%+16.1%0.816%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC8,400$0.31M0.0%N/A0.016%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN21,151$0.77M0.0%+69.8%0.039%Search for SEC Filing on Google Icon
2/12/2026SR One Capital Management LP5,037,854$182.92M25.9%+2.6%9.385%Search for SEC Filing on Google Icon
2/12/2026Federated Hermes Inc.2,715,578$98.60M0.2%+45.9%5.059%Search for SEC Filing on Google Icon
2/12/2026Skandinaviska Enskilda Banken AB publ 163,860$5.95M0.0%N/A0.305%Search for SEC Filing on Google Icon
2/12/2026Alps Advisors Inc.44,077$1.60M0.0%+119.9%0.082%Search for SEC Filing on Google Icon
2/12/2026Swiss National Bank31,600$1.15M0.0%N/A0.059%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC50,850$1.85M0.0%+147.8%0.095%Search for SEC Filing on Google Icon
2/11/2026Deutsche Bank AG12,781$0.46M0.0%+4.5%0.024%Search for SEC Filing on Google Icon
2/11/2026Los Angeles Capital Management LLC14,447$0.53M0.0%N/A0.027%Search for SEC Filing on Google Icon
2/10/2026Goldman Sachs Group Inc.130,698$4.75M0.0%N/A0.243%Search for SEC Filing on Google Icon
2/10/2026Intech Investment Management LLC8,863$0.32M0.0%N/A0.017%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC588,393$21.37M0.0%+25.2%1.096%Search for SEC Filing on Google Icon
2/6/2026ProShare Advisors LLC5,820$0.21M0.0%N/A0.011%Search for SEC Filing on Google Icon
1/29/2026UBS Group AG69,495$2.52M0.0%+95.8%0.129%Search for SEC Filing on Google Icon
1/29/2026Vanguard Group Inc.1,453,065$52.76M0.0%+25.0%2.707%Search for SEC Filing on Google Icon
1/29/2026China Universal Asset Management Co. Ltd.13,314$0.48M0.0%N/A0.025%Search for SEC Filing on Google Icon
1/27/2026GF Fund Management CO. LTD.1,054$38K0.0%N/A0.002%Search for SEC Filing on Google Icon
1/26/2026Mirae Asset Global Investments Co. Ltd.2,608$95K0.0%N/A0.005%Search for SEC Filing on Google Icon
1/26/2026CWM LLC2,178$79K0.0%+48.3%0.004%Search for SEC Filing on Google Icon
1/1/2026JPMorgan Chase & Co.6,548$0.15M0.0%-14.7%0.012%Search for SEC Filing on Google Icon
11/17/2025Quarry LP1,134$25K0.0%+34.5%0.002%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC71,850$1.60M0.0%N/A0.134%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.7,461$0.17M0.0%-16.0%0.014%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE14,809$0.33M0.0%+5.8%0.028%Search for SEC Filing on Google Icon
11/17/2025ArrowMark Colorado Holdings LLC824,668$18.31M0.3%-24.6%1.536%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.18,350$0.41M0.0%+12.2%0.034%Search for SEC Filing on Google Icon
11/14/2025Creative Planning11,882$0.26M0.0%N/A0.022%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP20,382$0.45M0.0%+3.9%0.048%Search for SEC Filing on Google Icon
11/14/2025Wellington Management Group LLP857,524$19.04M0.0%-2.4%2.036%Search for SEC Filing on Google Icon
11/13/2025Invesco Ltd.145,796$3.24M0.0%N/A0.346%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG35,492$0.79M0.0%+46.3%0.084%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets3,146$70K0.0%+120.0%0.007%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.1,345$30K0.0%N/A0.003%Search for SEC Filing on Google Icon
11/13/2025Schroder Investment Management Group112,612$2.32M0.0%-27.3%0.267%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.1,162,758$25.81M0.0%+17.2%2.761%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.6,548$0.15M0.0%-14.7%0.016%Search for SEC Filing on Google Icon
11/7/2025PNC Financial Services Group Inc.5,843$0.13M0.0%-36.3%0.014%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers21,214$0.47M0.0%+7.6%0.050%Search for SEC Filing on Google Icon
11/5/2025Alps Advisors Inc.20,042$0.45M0.0%-11.1%0.048%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE13,991$0.14M0.0%+32.3%0.033%Search for SEC Filing on Google Icon
8/14/2025Sei Investments Co.12,142$0.12M0.0%N/A0.029%Search for SEC Filing on Google Icon
8/14/2025Federated Hermes Inc.1,861,838$18.04M0.0%+60.8%4.451%Search for SEC Filing on Google Icon
8/13/2025Schroder Investment Management Group154,916$1.48M0.0%-5.6%0.370%Search for SEC Filing on Google Icon
8/12/2025Rhumbline Advisers19,721$0.19M0.0%+71.3%0.047%Search for SEC Filing on Google Icon
8/8/2025Intech Investment Management LLC13,206$0.13M0.0%+13.9%0.032%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC373,617$3.62M0.0%+4.6%0.893%Search for SEC Filing on Google Icon
8/8/2025PNC Financial Services Group Inc.9,179$89K0.0%+41.2%0.022%Search for SEC Filing on Google Icon
6/27/2025Goldman Sachs Group Inc.23,957$0.19M0.0%-43.2%0.057%Search for SEC Filing on Google Icon
5/29/2025Rhumbline Advisers11,514$91K0.0%-70.4%0.028%Search for SEC Filing on Google Icon
5/16/2025Goldman Sachs Group Inc.23,957$0.19M0.0%-43.2%0.057%Search for SEC Filing on Google Icon
5/14/2025Wellington Management Group LLP873,623$6.90M0.0%-23.0%2.088%Search for SEC Filing on Google Icon
5/12/2025Nuveen LLC31,626$0.25M0.0%N/A0.076%Search for SEC Filing on Google Icon
5/9/2025Charles Schwab Investment Management Inc.116,140$0.92M0.0%-2.1%0.278%Search for SEC Filing on Google Icon
5/8/2025Jefferies Financial Group Inc.44,067$0.35M0.0%N/A0.105%Search for SEC Filing on Google Icon
5/1/2025New York State Common Retirement Fund6,200$49K0.0%N/A0.015%Search for SEC Filing on Google Icon
4/30/2025Alps Advisors Inc.28,132$0.22M0.0%-16.7%0.067%Search for SEC Filing on Google Icon
4/8/2025Rhumbline Advisers11,514$91K0.0%-70.4%0.028%Search for SEC Filing on Google Icon
3/24/2025Wellington Management Group LLP1,135,289$9.17M0.0%-24.4%2.716%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Zenas BioPharma logo
Zenas BioPharma, Inc. is a clinical-stage global biopharmaceutical company, which engages in the development and commercialization of transformative immunology-based therapies for patients. The company was founded by Lonnie O. Moulder Jr on November 12, 2019 and is headquartered in Waltham, MA.
Read More on Zenas BioPharma

Today's Range

Now: $22.30
Low: $21.00
High: $24.08

50 Day Range

MA: $23.17
Low: $18.15
High: $27.02

52 Week Range

Now: $22.30
Low: $6.11
High: $44.60

Volume

2,323,121 shs

Average Volume

536,298 shs

Market Capitalization

$1.28 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

N/A

Who are the company insiders with the largest holdings of Zenas BioPharma?

Zenas BioPharma's top insider shareholders include:
  1. Fairmount Funds Management Llc (Director)
  2. Sr One Capital Management, Llc (Major Shareholder)
  3. Patrick G Enright (Director)
  4. Jason Raleigh Nunn (Director)
  5. Leon O Moulder Jr (CEO)
  6. Hongbo Lu (Director)
  7. Leon O Moulder Jr (Insider)
  8. Patricia L Allen (Director)
Learn More about top insider investors at Zenas BioPharma.

Who are the major institutional investors of Zenas BioPharma?

Zenas BioPharma's top institutional shareholders include:
  1. SR One Capital Management LP — 9.38%
  2. NEA Management Company LLC — 6.56%
  3. Federated Hermes Inc. — 5.06%
  4. Vanguard Group Inc. — 2.71%
  5. Polar Capital Holdings Plc — 1.97%
  6. Vivo Capital LLC — 1.59%
Learn More about top institutional investors of Zenas BioPharma stock.

Which major investors are selling Zenas BioPharma stock?

During the last quarter, ZBIO stock was sold by these institutional investors:
  1. Vivo Capital LLC
  2. Pivotal bioVenture Partners Investment Advisor LLC
  3. Rock Springs Capital Management LP
  4. ArrowMark Colorado Holdings LLC
  5. Schroder Investment Management Group
  6. Eversept Partners LP
  7. Millennium Management LLC
  8. Superstring Capital Management LP

Which major investors are buying Zenas BioPharma stock?

During the previous quarter, ZBIO stock was purchased by institutional investors including:
  1. Polar Capital Holdings Plc
  2. Federated Hermes Inc.
  3. NEA Management Company LLC
  4. EcoR1 Capital LLC
  5. NEXTBio Capital Management LP
  6. Vanguard Group Inc.
  7. Balyasny Asset Management L.P.
  8. Skandinaviska Enskilda Banken AB publ
In the last year, these company insiders have bought Zenas BioPharma stock:
  1. Fairmount Funds Management Llc (Director)
  2. Sr One Capital Management, Llc (Major Shareholder)
  3. Patrick G Enright (Director)
  4. Jason Raleigh Nunn (Director)
  5. Leon O Moulder Jr (CEO)
  6. Hongbo Lu (Director)
  7. Leon O Moulder Jr (Insider)
  8. Patricia L Allen (Director)
Learn More investors buying Zenas BioPharma stock.