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SMMT Insider Trading

Insider Ownership Percentage: 83.50%
Insider Buying (Last 12 Months): $114,616,848.98
Insider Selling (Last 12 Months): $0.00

Summit Therapeutics Insider Trading History Chart

This chart shows the insider buying and selling history at Summit Therapeutics by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Summit Therapeutics Share Price & Price History

Current Price: $15.61
Price Change: ▼ Price Decrease of -0.77 (-4.70%)
As of 09/25/2026 04:00 PM ET

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

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

Summit Therapeutics Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
6/12/2026Mahkam ZanganehCEOBuy3,810,000$13.12$49,987,200.00573,883,879View SEC Filing Icon  
6/12/2026Robert W. DugganCEOBuy3,810,000$13.12$49,987,200.00573,883,879View SEC Filing Icon  
6/4/2026Mahkam ZanganehCEOBuy100,000$14.60$1,460,000.0025,824,474View SEC Filing Icon  
6/4/2026Manmeet Singh SoniCFOBuy50,000$14.45$722,500.003,123,603View SEC Filing Icon  
6/4/2026Robert W. DugganCEOBuy100,000$14.60$1,460,000.0025,824,474View SEC Filing Icon  
10/21/2025Mahkam ZanganehCEOBuy26,680$18.74$499,983.2076,680View SEC Filing Icon  
10/21/2025Robert W. DugganCEOBuy26,680$18.74$499,983.2076,680View SEC Filing Icon  
10/21/2025Yu XiaDirectorBuy533,617$18.74$9,999,982.5832,057,147View SEC Filing Icon  
9/11/2025Mahkam ZanganehCEOBuy5,000$18.07$90,350.00556,093,090View SEC Filing Icon  
9/11/2025Robert W. DugganCEOBuy5,000$18.07$90,350.00556,093,090View SEC Filing Icon  
9/10/2025Mahkam ZanganehCEOBuy333,394$17.68$5,894,405.92556,088,090View SEC Filing Icon  
9/10/2025Robert W. DugganCEOBuy333,394$17.68$5,894,405.92556,088,090View SEC Filing Icon  
3/26/2024Ankur DhingraCFOBuy100,000$3.75$375,000.00354,958View SEC Filing Icon  
3/26/2024Mahkam ZanganehCEOBuy30,000$3.75$112,500.0030,000View SEC Filing Icon  
12/13/2023Ankur DhingraCFOBuy20,400$2.17$44,268.00254,958View SEC Filing Icon  
12/12/2023Mahkam ZanganehCEOBuy5,000$2.07$10,350.00494,814View SEC Filing Icon  
10/13/2023Manmeet Singh SoniCOOBuy2,976,190$1.68$4,999,999.202,976,190View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Summit Therapeutics (NASDAQ:SMMT)

4.61% of Summit Therapeutics stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

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

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Summit Therapeutics Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026Tidal Investments LLC121,097$1.76M0.0%+0.7%0.015%Search for SEC Filing on Google Icon
9/9/2026Engineers Gate Manager LP67,871$0.99M0.0%N/A0.009%Search for SEC Filing on Google Icon
9/8/2026Nykredit A S7,634$0.11M0.0%N/A0.001%Search for SEC Filing on Google Icon
8/21/2026AXQ Capital LP93,624$1.36M0.1%+98.1%0.012%Search for SEC Filing on Google Icon
8/21/2026Nykredit A S7,634$0.11M0.0%N/A0.001%Search for SEC Filing on Google Icon
8/20/2026Two Sigma Securities LLC12,491$0.18M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC90,338$1.32M0.0%+13.4%0.011%Search for SEC Filing on Google Icon
8/19/2026Hsbc Holdings PLC120,560$1.78M0.0%N/A0.015%Search for SEC Filing on Google Icon
8/19/2026Wellington Management Group LLP441,934$6.44M0.0%+21.8%0.055%Search for SEC Filing on Google Icon
8/18/2026Beacon Pointe Advisors LLC98,114$1.43M0.0%N/A0.012%Search for SEC Filing on Google Icon
8/18/2026Public Employees Retirement System of Ohio38,501$0.56M0.0%N/A0.005%Search for SEC Filing on Google Icon
8/17/2026Seven Fleet Capital Management LP73,300$1.09M0.2%N/A0.009%Search for SEC Filing on Google Icon
8/17/2026Bank of America Corp DE864,983$12.60M0.0%N/A0.108%Search for SEC Filing on Google Icon
8/15/2026Elmind Capital LP493,820$7.19M0.0%N/A0.062%Search for SEC Filing on Google Icon
8/14/2026ADAR1 Capital Management LLC191,869$2.80M0.1%N/A0.024%Search for SEC Filing on Google Icon
8/14/2026Hsbc Holdings PLC120,560$1.78M0.0%N/A0.015%Search for SEC Filing on Google Icon
8/14/2026Osterweis Capital Management Inc.5,000$73K0.0%N/A0.001%Search for SEC Filing on Google Icon
8/14/2026Legal & General Group Plc18,247$0.27M0.0%N/A0.002%Search for SEC Filing on Google Icon
8/14/2026The Manufacturers Life Insurance Company298,000$4.34M0.0%N/A0.037%Search for SEC Filing on Google Icon
8/13/2026Polymer Capital Management HK LTD224,853$3.28M0.2%N/A0.028%Search for SEC Filing on Google Icon
8/11/2026E Fund Management Co. Ltd.30,468$0.44M0.0%N/A0.004%Search for SEC Filing on Google Icon
8/7/2026BlackRock Inc.9,529,041$138.84M0.0%N/A1.194%Search for SEC Filing on Google Icon
8/7/2026Deutsche Bank AG239,347$3.49M0.0%N/A0.030%Search for SEC Filing on Google Icon
8/6/2026Bank of New York Mellon Corp431,299$6.28M0.0%N/A0.054%Search for SEC Filing on Google Icon
8/6/2026State of Wyoming35,973$0.52M0.1%N/A0.005%Search for SEC Filing on Google Icon
8/6/2026GSA Capital Partners LLP11,423$0.17M0.0%N/A0.001%Search for SEC Filing on Google Icon
7/10/2026Tema ETFs LLC121,097$1.76M0.1%+1.3%0.016%Search for SEC Filing on Google Icon
7/10/2026Handelsbanken Fonder AB55,500$0.81M0.0%+24.4%0.007%Search for SEC Filing on Google Icon
6/3/2026Parallel Advisors LLC2,139$41K0.0%+4,178.0%0.000%Search for SEC Filing on Google Icon
5/19/2026Bank of America Corp DE598,692$11.35M0.0%+25.4%0.077%Search for SEC Filing on Google Icon
5/18/2026California State Teachers Retirement System6,391$0.12M0.0%-12.1%0.001%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada7,422$0.14M0.0%+132.2%0.001%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company592,810$11.24M0.0%+34.4%0.076%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP73,835$1.40M0.0%+415.5%0.010%Search for SEC Filing on Google Icon
5/15/2026Entropy Technologies LP21,783$0.41M0.0%-13.4%0.003%Search for SEC Filing on Google Icon
5/14/2026Public Employees Retirement System of Ohio33,999$0.65M0.0%-3.3%0.004%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.19,681$0.37M0.0%+95.6%0.003%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers29,738$0.56M0.0%N/A0.004%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP88,496$1.67M0.0%-76.5%0.011%Search for SEC Filing on Google Icon
5/7/2026Parallel Advisors LLC2,139$41K0.0%+4,178.0%0.000%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp404,679$7.67M0.0%+14.4%0.052%Search for SEC Filing on Google Icon
5/5/2026Illinois Municipal Retirement Fund111,894$2.12M0.0%+12.6%0.014%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp3,732$71K0.0%+24.4%0.000%Search for SEC Filing on Google Icon
5/1/2026Ball & Co Wealth Management Inc.1,500$28K0.0%N/A0.000%Search for SEC Filing on Google Icon
4/30/2026Griffin Asset Management Inc.191,872$3.64M0.4%-1.9%0.025%Search for SEC Filing on Google Icon
4/30/2026Capstone Capital Management Ltd23,146$0.44M0.4%-17.9%0.003%Search for SEC Filing on Google Icon
4/27/2026Y Intercept Hong Kong Ltd119,655$2.27M0.0%N/A0.015%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA1,323,179$23.96M0.0%-4.4%0.171%Search for SEC Filing on Google Icon
4/20/2026Banque Cantonale Vaudoise23,916$0.45M0.0%N/A0.003%Search for SEC Filing on Google Icon
4/17/2026Wealth Management Partners LLC63,784$1.21M0.3%+7.3%0.008%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC53,523$1.02M0.0%+243.3%0.007%Search for SEC Filing on Google Icon
3/6/2026Hsbc Holdings PLC98,766$1.72M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.1,873$33K0.0%+2,654.4%0.000%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.461,301$8.07M0.0%+8.3%0.060%Search for SEC Filing on Google Icon
2/18/2026Vident Advisory LLC35,880$0.63M0.0%-2.1%0.005%Search for SEC Filing on Google Icon
2/18/2026Beacon Pointe Advisors LLC39,611$0.69M0.0%+10.9%0.005%Search for SEC Filing on Google Icon
2/18/2026Virtus Investment Advisers LLC15,141$0.27M0.1%+168.3%0.002%Search for SEC Filing on Google Icon
2/18/2026Tudor Investment Corp ET AL423,084$7.40M0.0%+21.8%0.055%Search for SEC Filing on Google Icon
2/18/2026Readystate Asset Management LP306,184$5.36M0.2%N/A0.040%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.50,298$0.88M0.0%-74.2%0.007%Search for SEC Filing on Google Icon
2/18/2026Baker BROS. Advisors LP36,391,063$636.48M3.7%+7.9%4.719%Search for SEC Filing on Google Icon
2/17/2026Guggenheim Capital LLC49,798$0.87M0.0%+21.5%0.006%Search for SEC Filing on Google Icon
2/17/2026ADAR1 Capital Management LLC91,869$1.61M0.1%-10.8%0.012%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC27,304$0.48M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC357,870$6.20M0.0%+90.9%0.046%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD9,371,415$163.91M0.0%+106.5%1.215%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.1,873$33K0.0%+2,654.4%0.000%Search for SEC Filing on Google Icon
2/17/2026Public Employees Retirement System of Ohio35,158$0.62M0.0%-3.7%0.005%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.16,966$0.30M0.0%-70.8%0.002%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board92,882$1.63M0.0%+1.1%0.012%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada3,196$56K0.0%-98.3%0.000%Search for SEC Filing on Google Icon
2/17/2026Cynosure Group LLC22,070$0.39M0.0%+18.6%0.003%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC715,410$12.51M0.0%-7.4%0.093%Search for SEC Filing on Google Icon
2/16/2026Truvestments Capital LLC2,603$46K0.0%+200.2%0.000%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC228,990$4.01M0.0%+38.3%0.030%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC73,497$1.29M0.0%-7.6%0.010%Search for SEC Filing on Google Icon
2/16/2026Entropy Technologies LP25,162$0.44M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC338,390$5.92M0.0%-28.9%0.044%Search for SEC Filing on Google Icon
2/13/2026Kestra Advisory Services LLC1,622$28K0.0%N/A0.000%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 440,953$7.71M0.0%+47.2%0.057%Search for SEC Filing on Google Icon
2/13/2026Hudson Bay Capital Management LP11,440$0.20M0.0%N/A0.001%Search for SEC Filing on Google Icon
2/13/2026Schroder Investment Management Group251,391$4.40M0.0%+3.6%0.033%Search for SEC Filing on Google Icon
2/13/2026Rafferty Asset Management LLC287,810$5.03M0.0%-15.1%0.037%Search for SEC Filing on Google Icon
2/13/2026First Trust Advisors LP28,115$0.49M0.0%-83.6%0.004%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.892,629$15.61M0.0%+1.9%0.116%Search for SEC Filing on Google Icon
2/13/2026State Street Corp6,636,361$116.07M0.0%+4.3%0.861%Search for SEC Filing on Google Icon
2/13/2026Polymer Capital Management HK LTD1,421,155$24.86M3.5%+73.9%0.184%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN130,886$2.29M0.0%-32.2%0.017%Search for SEC Filing on Google Icon
2/12/2026Federation des caisses Desjardins du Quebec8,613$0.15M0.0%-7.4%0.001%Search for SEC Filing on Google Icon
2/12/2026Dimensional Fund Advisors LP376,563$6.59M0.0%+0.5%0.049%Search for SEC Filing on Google Icon
2/12/2026Steward Partners Investment Advisory LLC23,045$0.40M0.0%+15.7%0.003%Search for SEC Filing on Google Icon
2/12/2026New York State Common Retirement Fund53,777$0.94M0.0%-79.7%0.007%Search for SEC Filing on Google Icon
2/12/2026Campbell & CO Investment Adviser LLC15,407$0.27M0.0%N/A0.002%Search for SEC Filing on Google Icon
2/12/2026Bank of Montreal Can95,371$1.67M0.0%-2.7%0.012%Search for SEC Filing on Google Icon
2/11/2026Illinois Municipal Retirement Fund99,367$1.74M0.0%+44.7%0.013%Search for SEC Filing on Google Icon
2/11/2026Deutsche Bank AG237,788$4.16M0.0%-11.9%0.031%Search for SEC Filing on Google Icon
2/11/2026Cerity Partners LLC112,878$1.97M0.0%-1.6%0.015%Search for SEC Filing on Google Icon
2/11/2026LPL Financial LLC13,160$0.23M0.0%-42.3%0.002%Search for SEC Filing on Google Icon
2/11/2026Havemeyer Place LP6,254$0.11M0.0%N/A0.001%Search for SEC Filing on Google Icon
2/11/2026Daiwa Securities Group Inc.2,157$38K0.0%-83.0%0.000%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Summit Therapeutics logo
Summit Therapeutics Inc., a biopharmaceutical company, focuses on discovery, development, and commercialization of patient, physician, caregiver, and societal friendly medicinal therapies in the United States, and the United Kingdom. The company's lead development candidate is Ivonescimab, a bispecific antibody for immunotherapy through blockade of PD-1 with the anti-angiogenesis; and anti-infectives portfolio includes SMT-738, a novel class of precision antibiotics for the treatment of multidrug resistant infections, which primarily includes carbapenem-resistant Enterobacteriaceae infections. It has a collaboration and license agreement with Akeso, Inc. and its affiliates to develop and commercialize ivonescimab, as well as strategic collaboration with The University of Texas MD Anderson Cancer Center for the purpose of accelerating the development of ivonescimab. The company was founded in 2003 and is headquartered in Miami, Florida.
Read More on Summit Therapeutics

Today's Range

Now: $15.61
Low: $15.55
High: $16.58

50 Day Range

MA: $14.89
Low: $12.43
High: $18.42

52 Week Range

Now: $15.61
Low: $12.07
High: $29.23

Volume

3,800,162 shs

Average Volume

5,886,217 shs

Market Capitalization

$12.45 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

N/A

Who are the company insiders with the largest holdings of Summit Therapeutics?

Summit Therapeutics' top insider investors include:
  1. Mahkam Zanganeh (CEO)
  2. Robert W Duggan (CEO)
  3. Yu Xia (Director)
  4. Manmeet Singh Soni (CFO)
  5. Manmeet Singh Soni (COO)
  6. Ankur Dhingra (CFO)
  7. David Jonathan Powell (Insider)
  8. Maky Zanganeh (COO)
Learn More about top insider investors at Summit Therapeutics.

Who are the major institutional investors of Summit Therapeutics?

Summit Therapeutics' top institutional shareholders include:
  1. BlackRock Inc. — 1.19%
  2. Bank of America Corp DE — 0.11%
  3. Elmind Capital LP — 0.06%
  4. Wellington Management Group LLP — 0.06%
  5. Bank of New York Mellon Corp — 0.05%
  6. The Manufacturers Life Insurance Company — 0.04%
Learn More about top institutional investors of Summit Therapeutics stock.

Which major investors are selling Summit Therapeutics stock?

During the previous quarter, SMMT stock was sold by these institutional investors:
  1. California State Teachers Retirement System

Which major investors are buying Summit Therapeutics stock?

In the previous quarter, SMMT stock was purchased by institutional investors including:
  1. BlackRock Inc.
  2. Bank of America Corp DE
  3. Elmind Capital LP
  4. Bank of New York Mellon Corp
  5. The Manufacturers Life Insurance Company
  6. Deutsche Bank AG
  7. Polymer Capital Management HK LTD
  8. ADAR1 Capital Management LLC
Within the last year, these company insiders have bought Summit Therapeutics stock:
  1. Mahkam Zanganeh (CEO)
  2. Robert W Duggan (CEO)
  3. Yu Xia (Director)
  4. Manmeet Singh Soni (CFO)
Learn More investors buying Summit Therapeutics stock.

Summit Therapeutics Active Insiders

Robert W Duggan
Robert W Duggan (Age 82)
CEO
2 recent trades
Mahkam Zanganeh
Mahkam Zanganeh (Age 56)
CEO
2 recent trades
Maky Zanganeh
Maky Zanganeh
COO
2 recent trades
Ankur Dhingra
Ankur Dhingra (Age 50)
CFO
Yu Xia
Yu Xia
Director