TransMedics Group Ownership | Who Owns TransMedics Group?
TransMedics Group Ownership Summary
TransMedics Group is owned by 29.07% institutional investors, 3.29% insiders, and 67.63% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.28% of TMDX shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 6.07% of its assets in TransMedics Group shares.
TMDX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | TransMedics Group | 29.07% | 3.29% | 67.63% |
| Sector | Healthcare Stocks | 35.56% | 12.08% | 52.36% |
| Industry | Medical Device Stocks | 36.89% | 11.20% | 51.91% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 5.60M | 16.28% | $371.72M |
| Fmr | 5.10M | 14.89% | $506.62M |
| Vanguard group | 3.61M | 10.57% | $438.58M |
| Blackrock | 2.65M | 8.08% | $398.47M |
| State street | 1.42M | 4.13% | $94.34M |
| Invesco | 1.04M | 3.03% | $103.18M |
| Ubs asset management americas | 939.52K | 2.75% | $93.40M |
| Macquarie management | 885.84K | 2.59% | $88.06M |
| Goldman sachs group | 866.28K | 2.53% | $86.12M |
| Geode capital management | 839.15K | 2.45% | $83.44M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Lagoda investment management | 90.53K | 5.55% | $9.00M |
| Montanaro asset management | 78.74K | 2.34% | $7.83M |
| Beaconlight capital | 42.48K | 2.22% | $4.22M |
| Bastion asset management | 55.46K | 1.86% | $6.10M |
| Bullseye asset management | 24.06K | 1.39% | $2.39M |
| Brown capital management | 89.83K | 1.19% | $5.97M |
| Braidwell lp | 329.39K | 1.09% | $32.74M |
| Regency capital management inc.\de | 21.85K | 0.97% | $2.17M |
| Eventide asset management | 548.82K | 0.90% | $54.53M |
| Bryce point capital | 6.13K | 0.84% | $687.90K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Liontrust investment partners llp | 596.40K | 0.54% | 565.26K |
| Invesco | 1.04M | 0.02% | 353.40K |
| Blackrock funding, inc. /de | 5.60M | 0.01% | 303.22K |
| Vanguard fiduciary trust | 236.39K | 0.01% | 236.39K |
| Congress asset management co /ma | 227.83K | 0.09% | 227.83K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fil | - | - | -1.06M |
| Macquarie group | - | - | -906.27K |
| Driehaus capital management | 40.11K | 0.03% | -671.93K |
| Fuller & thaler asset management | - | - | -456.52K |
| 1832 asset management | - | - | -455.44K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Vanguard fiduciary trust | 236.39K | 0.01% | 236.39K | $23.50M |
| Congress asset management co /ma | 227.83K | 0.09% | 227.83K | $15.13M |
| Exoduspoint capital management, lp | 115.34K | 0.09% | 115.34K | $11.47M |
| Longaeva partners | 69.06K | 0.25% | 69.06K | $6.86M |
| Integrated advisors network | 47.59K | 0.25% | 47.59K | $4.73M |
Sold Out
| Holder | Change |
|---|---|
| Bryn mawr trust | -1.00 |
| Stephens consulting | -1.00 |
| Twin tree management, lp | -1.00 |
| Tfc financial management | -1.00 |
| Tortoise investment management | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 223 | -50.11% | 9,949,512 | -73.24% | 29 | 0.24% | 109 | -55.33% | 66 | -50.38% |
| Dec 31, 2025 | 328 | -21.15% | 23,291,905 | -38.14% | 68 | 0.55% | 180 | -23.08% | 89 | -23.28% |
| Sep 30, 2025 | 398 | 4.74% | 37,059,706 | 4.65% | 109 | 1.00% | 223 | 3.72% | 114 | - |
| Jun 30, 2025 | 382 | 20.13% | 36,167,798 | -7.22% | 106 | 0.80% | 220 | 27.17% | 111 | 20.65% |
| Mar 31, 2025 | 318 | -4.50% | 38,982,186 | 5.78% | 115 | 0.95% | 174 | -14.29% | 91 | 10.98% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 2.10M | 6.07% | -1.88K |
| Vanguard US Total Market Shares ETF | 1.02M | 3.01% | 33.89K |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.04M | 3.01% | -2.42K |
| Vanguard Total Stock Mkt Idx Inv | 1.04M | 3.01% | -2.42K |
| iShares Russell 2000 ETF | 872.15K | 2.52% | -15.46K |
| Vanguard Small Cap Index | 753.28K | 2.18% | 3.54K |
| Fidelity Small Cap Growth | 726.13K | 2.10% | 105.15K |
| Fidelity | 646.00K | 1.90% | - |
| Canada Life US Small-Mid Cap Growth A | 626.07K | 1.87% | - |
| Nomura US Small Cap Core Equity | 617.38K | 1.79% | 158.81K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Gunderson Thomas J. | - | Sell | $722.38K |
| Mar 04, 2026 | Lovell Stephanie | - | Sell | $178.50K |
| Mar 04, 2026 | Weill David | - | Sell | $524.29K |
| Mar 04, 2026 | Hernandez Gerardo | Chief Financial Officer | Sell | $870.31K |
| Mar 02, 2026 | Hernandez Gerardo | Chief Financial Officer | Sell | $52.17K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 1 |
| 2026 Q1 | - | 6 |
| 2025 Q4 | 1 | 4 |
| 2025 Q3 | 3 | 1 |
| 2025 Q2 | - | 4 |
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