TransMedics Group Ownership | Who Owns TransMedics Group?
TransMedics Group Ownership Summary
TransMedics Group is owned by 102.03% institutional investors, 3.64% insiders. 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 5.99% of its assets in TransMedics Group shares.
TMDX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | TransMedics Group | 102.03% | 3.64% | -5.67% |
| Sector | Healthcare Stocks | 246.48% | 12.12% | -158.60% |
| Industry | Medical Device Stocks | 52.58% | 12.61% | 34.81% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 5.60M | 16.28% | $371.72M |
| Fmr | 5.13M | 14.93% | $340.96M |
| Vanguard group | 3.61M | 10.57% | $438.58M |
| Blackrock | 2.65M | 8.08% | $398.47M |
| Vanguard capital management | 1.50M | 4.36% | $99.47M |
| State street | 1.42M | 4.13% | $94.34M |
| Macquarie management | 910.50K | 2.65% | $60.48M |
| Geode capital management | 894.91K | 2.60% | $59.45M |
| Hood river capital management | 751.13K | 2.18% | $49.89M |
| Dimensional fund advisors lp | 627.98K | 1.82% | $52.41M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Lagoda investment management | 97.47K | 3.56% | $6.47M |
| Bastion asset management | 55.54K | 1.96% | $4.49M |
| Braidwell lp | 609.72K | 1.50% | $40.50M |
| Taylor frigon capital management | 34.99K | 1.48% | $2.92M |
| Brown capital management | 89.83K | 1.42% | $7.50M |
| Sectoral asset management | 21.95K | 1.02% | $1.46M |
| Bryce point capital | 6.13K | 0.84% | $687.90K |
| Bullseye asset management | 24.30K | 0.82% | $1.61M |
| Summit creek advisors | 23.73K | 0.79% | $1.98M |
| Emerald advisers | 490.49K | 0.77% | $32.58M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Liontrust investment partners llp | 596.40K | 0.54% | 565.26K |
| Citadel advisors | 558.82K | 0.00% | 497.22K |
| Sixth street partners management company | 328.67K | 0.00% | 328.67K |
| Blackrock funding, inc. /de | 5.60M | 0.01% | 303.22K |
| Braidwell lp | 609.72K | 1.50% | 280.32K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fil | - | - | -1.06M |
| Macquarie group | - | - | -906.27K |
| Invesco | 394.98K | 0.00% | -643.00K |
| Ubs asset management americas | 398.25K | 0.00% | -541.27K |
| Fuller & thaler asset management | - | - | -456.52K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Sixth street partners management company | 328.67K | 0.00% | 328.67K | $21.83M |
| Toroso investments | 251.20K | 0.03% | 251.20K | $16.68M |
| Point72 asset management | 192.59K | 0.01% | 192.59K | $12.79M |
| Trek financial | 143.67K | 0.56% | 143.67K | $11.99M |
| Dz bank ag deutsche zentral genossenschafts bank, frankfurt am main | 75.09K | 0.00% | 75.09K | $4.99M |
Sold Out
| Holder | Change |
|---|---|
| Bryn mawr trust | -1.00 |
| Stephens consulting | -1.00 |
| Tfc financial management | -1.00 |
| Twin tree management, lp | -1.00 |
| Tortoise investment management | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 398 | -8.08% | 35,082,220 | -3.73% | 102 | 0.91% | 211 | -0.94% | 120 | -14.29% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 2.08M | 5.99% | 1.30K |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.04M | 3.01% | 3.34K |
| 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 | 867.92K | 2.50% | -3.54K |
| Vanguard Small Cap Index | 741.84K | 2.14% | -13.02K |
| Fidelity Small Cap Growth | 726.13K | 2.09% | - |
| Fidelity | 646.00K | 1.90% | - |
| Canada Life US Small-Mid Cap Growth A | 626.07K | 1.87% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 11, 2026 | Weill David | - | Buy | $109.06K |
| 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 |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q4 | - | - |
| 2026 Q3 | 1 | - |
| 2026 Q2 | - | 1 |
| 2026 Q1 | - | 6 |
| 2025 Q4 | 1 | 4 |
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