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DaveManuel.com · Institutional Ownership · Who Owns It

TRANSMEDICS GROUP INC (TMDX)

Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.

384
Reporting holders
$2.6B
Reported value
100.4%
Of shares outstanding
4.5%
Calls
5.1%
Puts
-38
Holder change

Institutions report 34,821,941 shares against 34,675,145 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Over 100% because an adviser and a sub-adviser can both report the same shares, and both are counted.

Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.

Holders

Download these holders as CSV

FilerValueShares Their book Held Change
BlackRock, Inc.$371.7M5,596,5490.01%8q+5.7%+$20.1M
FMR LLC$341.0M5,133,3280.01%29q+0.7%+$2.5M
VANGUARD PORTFOLIO MANAGEMENT LLC$128.5M1,933,9890.01%2q+0.8%+$960.0K
VANGUARD CAPITAL MANAGEMENT LLC$99.5M1,497,6000.00%2q+1.3%+$1.3M
SUSQUEHANNA INTERNATIONAL GROUP, LLP$95.8M
incl. $78.8M options CALL+PUT
255,3980.01%18q+90.8%+$45.6M
STATE STREET CORP$94.3M1,420,4210.00%29q+7.7%+$6.7M
CITADEL ADVISORS LLC$94.1M
incl. $57.0M options CALL+PUT
558,8240.01%24q+807.2%+$83.8M
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.$60.5M910,4950.09%3q+2.8%+$1.6M
GEODE CAPITAL MANAGEMENT, LLC$59.5M894,9130.00%29q+6.6%+$3.7M
Tidal Investments LLC$49.9M
incl. $33.2M options PUT
251,1960.09%newNEW
Hood River Capital Management LLC$49.9M751,1330.36%6q+7.3%+$3.4M
JANE STREET GROUP, LLC$40.9M CALL+PUToptions only0.00%17qOPTIONS
DIMENSIONAL FUND ADVISORS LP$40.5M610,1070.01%8q+18.1%+$6.2M
BRAIDWELL LP$40.5M609,7151.50%7q+85.1%+$18.6M
GOLDMAN SACHS GROUP INC$37.2M559,7710.00%26q-35.4%-$20.4M
EVENTIDE ASSET MANAGEMENT, LLC$36.5M548,8740.49%13qHELD
WELLINGTON MANAGEMENT GROUP LLP$34.3M515,9730.01%9q+6.1%+$2.0M
EMERALD ADVISERS, LLC$32.6M490,4910.77%29q+43.1%+$9.8M
UBS Group AG$32.5M
incl. $66.4K options CALL
488,0580.00%29q-16.0%-$6.2M
MORGAN STANLEY$26.9M405,1120.00%29q-41.6%-$19.2M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$26.5M398,2500.00%21q-57.6%-$36.0M
Invesco Ltd.$26.2M394,9790.00%22q-61.9%-$42.7M
CITIGROUP INC$25.6M386,0660.01%29q+8.0%+$1.9M
Capital World Investors$25.5M384,6710.00%6q+2.8%+$697.0K
IMC-Chicago, LLC$25.4M
incl. $19.3M options CALL+PUT
90,5150.01%8q+226.9%+$17.6M
NORTHERN TRUST CORP$24.5M368,8600.00%29q+9.1%+$2.0M
CHARLES SCHWAB INVESTMENT MANAGEMENT INC$21.8M328,6660.00%29q+3.1%+$646.9K
WASATCH ADVISORS LP$20.5M308,4340.13%10q-10.9%-$2.5M
ZEVENBERGEN CAPITAL INVESTMENTS LLC$20.5M308,3910.47%5q+7.6%+$1.5M
EMERALD MUTUAL FUND ADVISERS TRUST$20.1M302,0740.71%29q+31.7%+$4.8M
BAILLIE GIFFORD & CO$17.8M267,9350.02%22q-12.2%-$2.5M
MILLENNIUM MANAGEMENT LLC$17.5M
incl. $976.4K options CALL
248,3120.01%17q-18.9%-$4.1M
WELLS FARGO & COMPANY/MN$17.3M260,2180.00%29q-5.0%-$902.2K
BANK OF AMERICA CORP /DE/$17.1M257,0010.00%29q-12.9%-$2.5M
VANGUARD FIDUCIARY TRUST CO$16.3M245,6800.00%2q+3.9%+$616.8K
PRINCIPAL FINANCIAL GROUP INC$16.0M240,8670.01%22q+4.1%+$626.6K
BARCLAYS PLC$15.8M237,6150.00%29q+24.7%+$3.1M
CONGRESS ASSET MANAGEMENT CO$15.1M227,8340.09%newNEW
DEUTSCHE BANK AG\$14.4M217,0310.00%29q+11.1%+$1.4M
Point72 Asset Management, L.P.$14.1M
incl. $1.3M options CALL+PUT
192,5940.02%3qHELD
JPMORGAN CHASE & CO$13.0M192,2690.00%29q-37.6%-$7.9M
Bank of New York Mellon Corp$12.9M193,7520.00%29q-8.3%-$1.2M
FirstWave Capital Management LLC$12.7M191,2405.61%3q+53.9%+$4.4M
Davidson Kempner Capital Management LP$11.1M166,9000.13%6q+14.0%+$1.4M
HRT FINANCIAL LP$11.0M165,1060.02%2q+398.8%+$8.8M
FRONTIER CAPITAL MANAGEMENT CO LLC$10.0M150,1620.09%7q-53.1%-$11.3M
Public Sector Pension Investment Board$7.9M118,7460.02%8q-2.9%-$233.1K
OPPENHEIMER & CO INC$7.4M110,7520.08%18q-2.4%-$180.7K
RENAISSANCE GROUP LLC$7.2M108,1570.29%4q+15.6%+$970.7K
Bellevue Group AG$6.7M101,1390.14%25qHELD
Lagoda Investment Management, L.P.$6.5M97,4653.56%14q+7.7%+$460.6K
BNP PARIBAS FINANCIAL MARKETS$6.4M96,3370.00%29q-33.3%-$3.2M
Trexquant Investment LP$6.2M93,9600.04%5q-11.6%-$819.6K
LAZARD ASSET MANAGEMENT LLC$6.1M92,5490.01%14q+42.8%+$1.8M
BROWN CAPITAL MANAGEMENT LLC$6.0M89,8281.19%6q-8.3%-$539.7K
Portolan Capital Management, LLC$5.5M82,3540.20%4q+670.5%+$4.8M
RHUMBLINE ADVISERS$5.3M80,2200.00%27q-10.7%-$637.9K
AMERIPRISE FINANCIAL INC$5.3M79,9480.00%16q-23.7%-$1.6M
Legal & General Group Plc$5.3M79,5820.00%29q+1.1%+$55.1K
Nuveen, LLC$5.3M79,3100.00%6q+1.1%+$59.2K
ALLIANCEBERNSTEIN L.P.$5.1M51,6510.00%28q+20.8%+$883.5K
Bastion Asset Management Inc.$5.1M79,4521.73%4q+43.3%+$1.5M
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main$5.0M75,0900.00%newNEW
AMERICAN CENTURY COMPANIES INC$4.7M70,8300.00%3q+13.2%+$547.0K
SIMPLEX TRADING, LLC$4.7M
incl. $4.6M options CALL+PUT
7340.00%22qHELD
BANK OF MONTREAL /CAN/$4.6M69,6010.00%13qHELD
PEREGRINE CAPITAL MANAGEMENT LLC$4.5M67,5440.15%16q+18.1%+$688.1K
Swiss National Bank$4.3M65,4000.00%21q+1.9%+$79.7K
RAYMOND JAMES FINANCIAL INC$4.3M
incl. $5.0K options CALL
64,4810.00%7q-43.9%-$3.4M
SEI INVESTMENTS CO$4.2M63,4740.00%18q-8.8%-$408.8K
Ensign Peak Advisors, Inc$3.8M57,3810.01%19q-24.1%-$1.2M
ALGERT GLOBAL LLC$3.8M57,1540.05%9q+124.6%+$2.1M
OSAIC HOLDINGS, INC.$3.6M
incl. $1.2K options CALL
54,0360.00%26q+673.3%+$3.1M
ENVESTNET ASSET MANAGEMENT INC$3.5M52,8280.00%27q-54.7%-$4.2M
F/m Investments LLC$3.4M51,9060.18%9q+29.5%+$785.1K
Empowered Funds, LLC$3.2M48,1540.02%newNEW
FIRST TRUST ADVISORS LP$3.2M48,1080.00%5q-10.7%-$384.0K
PRICE T ROWE ASSOCIATES INC /MD/$3.1M46,0280.00%19q-86.7%-$20.0M
BESSEMER GROUP INC$3.0M45,7990.00%8qHELD
Biondo Investment Advisors, LLC$2.9M44,1550.36%9q-23.8%-$917.6K
LPL Financial LLC$2.8M42,7250.00%16q+7.1%+$187.9K
CREDIT AGRICOLE S A$2.8M42,6470.01%7q-51.2%-$3.0M
TRILLIUM ASSET MANAGEMENT, LLC$2.8M41,5770.08%9q+11.1%+$276.7K
GROUP ONE TRADING LLC$2.7M
incl. $2.0M options CALL+PUT
9,5270.00%8q+50.4%+$890.5K
NORDEA INVESTMENT MANAGEMENT AB$2.7M40,4930.00%4q+4.3%+$109.2K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM$2.6M39,8500.00%29q+5.3%+$133.5K
Universal- Beteiligungs- und Servicegesellschaft mbH$2.6M39,3300.00%7q-16.8%-$527.7K
Atom Investors LP$2.4M36,5010.22%newNEW
PRUDENTIAL FINANCIAL INC$2.4M35,5450.00%9q-42.3%-$1.7M
Holocene Advisors, LP$2.2M33,7540.01%newNEW
Cambridge Investment Research Advisors, Inc.$2.2M32,9120.00%10q+88.7%+$1.0M
VANGUARD ASSET MANAGEMENT, Ltd$2.2M32,6800.00%2q+9.8%+$193.7K
Perigon Wealth Management, LLC$2.2M
incl. $697.4K options CALL
21,9640.03%9q+4.8%+$99.2K
NORGES BANK$2.0M30,5740.00%7qHELD
Emerald Investment Advisers, LLC$2.0M30,4560.13%2q+21.6%+$359.6K
ArrowMark Colorado Holdings LLC$2.0M30,1510.08%16q-82.4%-$9.4M
TUDOR INVESTMENT CORP ET AL$2.0M CALL+PUToptions only0.00%12qOPTIONS
STATE OF WISCONSIN INVESTMENT BOARD$1.9M29,1280.00%19q-4.9%-$99.0K
NEW YORK STATE TEACHERS RETIREMENT SYSTEM$1.9M28,8490.00%8q-2.0%-$38.6K
Brevan Howard Capital Management LP$1.9M28,8080.01%newNEW

Showing the largest 100 of 384 reported holders.

What the company announced

Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.

FiledEvent dateWhatSource
2026-09-102026-09-10Directors or officers departed or appointedfiling

What the insiders did

Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.

Officers and directors

DateInsiderRoleSideSharesValue
2026-06-15Gunderson Thomas J.DirectorSold9,624$722.4K
2026-09-11Weill DavidDirectorBought1,336$109.1K

Quarter by quarter

Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.

QuarterHoldersValue SharesNewAdded TrimmedOptions
Q3 2026102$133.3M1,597,7431631290.2%
Q2 2026384$2.6B34,821,941651341269.6%
Q1 2026422$3.8B36,502,815551421243.4%
Q4 2025440$4.7B37,213,173681511233.3%
Q3 2025396$4.5B37,558,179711471155.7%
Q2 2025376$5.3B37,085,4391031131145.9%
Q1 2025304$2.8B39,059,40449119934.5%
Q4 2024320$2.5B38,531,41253129834.5%
Q3 2024382$5.9B36,855,460821321192.3%
Q2 2024344$5.3B34,630,608104951171.7%
Q1 2024264$2.7B35,401,3055588792.4%
Q4 2023249$2.9B36,726,6484478850.9%
Q3 2023224$2.0B35,625,6162895662.2%
Q2 2023244$2.9B34,417,27647101621.0%
Q1 2023227$2.7B35,014,2074081742.0%
Q4 2022200$1.9B30,158,3733468721.4%
Q3 2022175$1.6B37,900,3106449412.4%
Q2 2022131$1.2B36,958,8583331350.8%
Q1 2022105$986.8M36,592,6581534310.1%
Q4 2021115$864.2M44,962,1951736280.3%
Q3 2021118$1.2B36,335,6592144261.0%
Q2 2021119$786.7M23,193,3172533402.1%
Q1 2021107$1.2B27,981,9774933201.5%
Q4 202068$595.5M29,862,199629170.2%
Q3 202073$405.7M29,365,3061729160.3%
Q2 202067$482.9M26,949,4882031100.0%
Q1 202054$340.6M28,197,186621150.0%
Q4 201958$390.6M20,547,847143230.0%
Q3 201949$341.6M14,494,375519120.0%
Q2 201962$392.5M14,040,76661000.0%
Q1 20191$2.0K541000.0%