트랜스메딕스 그룹, Inc.
MX ˙ BMV ˙ US89377M1099
SecurityMX:TMDX / TransMedics Group, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership42,764 shares
Latest Disclosed Value $ 5,202,241
Alliancebernstein L.p. reports 1.48% increase in ownership of TMDX / TransMedics Group, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 42,764 shares of TransMedics Group, Inc. (MX:TMDX) valued at $5,202,241 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 42,142 shares of TransMedics Group, Inc.. This represents a change in shares of 1.48% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F TRANSMEDICS GROUP COM 89377M109 42,764 622 1.48 5,202 1.48 0.0017
2026-02-17 2025-12-31 13F TRANSMEDICS GROUP COM 89377M109 42,142 1,353 3.32 5,127 12.02 0.0016
2025-11-14 2025-09-30 13F TRANSMEDICS GROUP COM 89377M109 40,789 6 0.01 4,577 -16.27 0.0014
2025-08-14 2025-06-30 13F TRANSMEDICS GROUP COM 89377M109 40,783 3 0.01 5,465 99.23 0.0018
2025-05-15 2025-03-31 13F TRANSMEDICS GROUP COM 89377M109 40,780 208 0.51 2,744 8.46 0.0010
2025-02-12 2024-12-31 13F TRANSMEDICS GROUP COM 89377M109 40,572 500 1.25 2,530 -59.80 0.0009
2024-11-14 2024-09-30 13F TRANSMEDICS GROUP COM 89377M109 40,072 1,442 3.73 6,291 8.13 0.0021
2024-08-14 2024-06-30 13F TRANSMEDICS GROUP COM 89377M109 38,630 6,970 22.02 5,818 148.63 0.0020
2024-05-14 2024-03-31 13F TRANSMEDICS GROUP COM 89377M109 31,660 -5,840 -15.57 2,341 -20.92 0.0008
2024-02-14 2023-12-31 13F TRANSMEDICS GROUP COM 89377M109 37,500 0 0.00 2,960 44.13 0.0011
2023-11-14 2023-09-30 13F TRANSMEDICS GROUP COM 89377M109 37,500 0 0.00 2,053 -34.80 0.0009
2023-08-15 2023-06-30 13F TRANSMEDICS GROUP COM 89377M109 37,500 5,800 18.30 3,149 31.21 0.0013
2023-05-15 2023-03-31 13F TRANSMEDICS GROUP COM 89377M109 31,700 0 0.00 2,401 22.70 0.0010
2023-02-15 2022-12-31 13F TRANSMEDICS GROUP COM 89377M109 31,700 10,700 50.95 1,957 123.03 0.0009
2022-11-15 2022-09-30 13F TRANSMEDICS GROUP COM 89377M109 21,000 0 0.00 877 32.88 0.0004
2022-08-15 2022-06-30 13F TRANSMEDICS GROUP COM 89377M109 21,000 0 0.00 660 16.61 0.0003
2022-05-13 2022-03-31 13F TRANSMEDICS GROUP COM 89377M109 21,000 0 0.00 566 40.80 0.0002
2022-02-14 2021-12-31 13F TRANSMEDICS GROUP COM 89377M109 21,000 -2,100 -9.09 402 -47.38 0.0001
2021-11-10 2021-09-30 13F TRANSMEDICS GROUP COM 89377M109 23,100 0 0.00 764 -0.26 0.0003
2021-07-30 2021-06-30 13F TRANSMEDICS GROUP COM 89377M109 23,100 0 0.00 766 -20.04 0.0003
2021-05-06 2021-03-31 13F TRANSMEDICS GROUP COM 89377M109 23,100 -1,500 -6.10 958 95.51 0.0004
2021-02-08 2020-12-31 13F TRANSMEDICS GROUP COM 89377M109 24,600 0 0.00 490 44.54 0.0002
2020-11-12 2020-09-30 13F TRANSMEDICS GROUP COM 89377M109 24,600 0 0.00 339 -23.13 0.0002
2020-08-13 2020-06-30 13F TRANSMEDICS GROUP COM 89377M109 24,600 5,800 30.85 441 94.27 0.0003
2020-05-14 2020-03-31 13F TRANSMEDICS GROUP COM 89377M109 18,800 6,900 57.98 227 0.44 0.0002
2020-02-18 2019-12-31 13F TRANSMEDICS GROUP COM 89377M109 11,900 700 6.25 226 -15.04 0.0001
2019-11-14 2019-09-30 13F TRANSMEDICS GROUP COM 89377M109 11,200 11,200 266 0.0002
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.