TransMedics Group, Inc.
US ˙ NasdaqGM ˙ US89377M1099

SecurityTMDX / TransMedics Group, Inc.
InstitutionWolverine Trading, Llc
Latest Disclosed Ownership65,578 shares
Latest Disclosed Value $ 7,386,706
Wolverine Trading, Llc ownership in TMDX / TransMedics Group, Inc.

On November 14, 2025 - Wolverine Trading, Llc filed a 13F-HR form disclosing ownership of 65,578 shares of TransMedics Group, Inc. (US:TMDX) valued at $7,357,852 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 18, 2025 disclosing 43,593 shares of TransMedics Group, Inc.. This represents a change in shares of 50.43% during the quarter. The current value of the position is $4,570,131 USD.

Wolverine Trading, Llc has a history of taking positions in derivatives of the underlying security (TMDX) in the form of stock options. The firm currently holds call options representing 76,100 of underlying shares valued at $8,571,904 USD and put options representing 61,300 of underlying shares valued at $6,904,832 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

TMDX / TransMedics Group, Inc. Historical Put/Call Ratio
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)
2025-11-14 2025-09-30 13F TRANSMEDICS GROUP COM 89377M109 65,578 21,985 50.43 7,387 28.90 0.0053
2025-08-18 2025-06-30 13F TRANSMEDICS GROUP COM 89377M109 43,593 22,052 102.37 5,730 287.95 0.0058
2025-05-15 2025-03-31 13F TRANSMEDICS GROUP COM 89377M109 21,541 -15,578 -41.97 1,477 -32.86 0.0017
2025-02-14 2024-12-31 13F TRANSMEDICS GROUP COM 89377M109 37,119 29,099 362.83 2,200 72.41 0.0021
2024-11-14 2024-09-30 13F TRANSMEDICS GROUP COM 89377M109 8,020 6,457 413.12 1,276 442.98 0.0013
2024-08-14 2024-06-30 13F TRANSMEDICS GROUP COM 89377M109 1,563 -4,501 -74.22 235 -47.54 0.0002
2024-05-15 2024-03-31 13F TRANSMEDICS GROUP COM 89377M109 6,064 2,390 65.05 448 55.02 0.0005
2024-02-14 2023-12-31 13F TRANSMEDICS GROUP COM 89377M109 3,674 3,674 290 0.0003
2022-05-16 2022-03-31 13F TRANSMEDICS GROUP COM 89377M109 0 -12,914 -100.00 0 -100.00
2022-02-14 2021-12-31 13F TRANSMEDICS GROUP COM 89377M109 12,914 12,914 251 0.0003
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F TRANSMEDICS GROUP COM Call 76,100 -30.44 8,572 -40.40 n/a n/a n/a
2025-08-18 2025-06-30 13F TRANSMEDICS GROUP COM Call 109,400 50.27 14,381 188.06 n/a n/a n/a
2025-05-15 2025-03-31 13F TRANSMEDICS GROUP COM Call 72,800 28.62 4,993 48.79 n/a n/a n/a
2025-02-14 2024-12-31 13F TRANSMEDICS GROUP COM Call 56,600 153.81 3,355 -5.44 n/a n/a n/a
2024-11-14 2024-09-30 13F TRANSMEDICS GROUP COM Call 22,300 32.74 3,549 40.24 n/a n/a n/a
2024-08-14 2024-06-30 13F TRANSMEDICS GROUP COM Call 16,800 18.31 2,530 141.18 n/a n/a n/a
2024-05-15 2024-03-31 13F TRANSMEDICS GROUP COM Call 14,200 -0.70 1,050 -7.00 n/a n/a n/a
2024-02-14 2023-12-31 13F TRANSMEDICS GROUP COM Call 14,300 232.56 1,129 380.00 n/a n/a n/a
2023-11-15 2023-09-30 13F TRANSMEDICS GROUP COM Call 4,300 235 n/a n/a n/a
2022-02-14 2021-12-31 13F TRANSMEDICS GROUP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F TRANSMEDICS GROUP COM Call 20,600 38.26 655 33.67 n/a n/a n/a
2021-08-06 2021-06-30 13F TRANSMEDICS GROUP COM Call 14,900 490 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F TRANSMEDICS GROUP COM Put 61,300 15.88 6,905 -0.70 n/a n/a n/a
2025-08-18 2025-06-30 13F TRANSMEDICS GROUP COM Put 52,900 37.05 6,954 162.67 n/a n/a n/a
2025-05-15 2025-03-31 13F TRANSMEDICS GROUP COM Put 38,600 -30.45 2,647 -19.54 n/a n/a n/a
2025-02-14 2024-12-31 13F TRANSMEDICS GROUP COM Put 55,500 296.43 3,290 47.73 n/a n/a n/a
2024-11-14 2024-09-30 13F TRANSMEDICS GROUP COM Put 14,000 81.82 2,228 92.15 n/a n/a n/a
2024-08-14 2024-06-30 13F TRANSMEDICS GROUP COM Put 7,700 37.50 1,160 179.95 n/a n/a n/a
2024-05-15 2024-03-31 13F TRANSMEDICS GROUP COM Put 5,600 -21.13 414 -26.07 n/a n/a n/a
2024-02-14 2023-12-31 13F TRANSMEDICS GROUP COM Put 7,100 560 n/a n/a n/a
2022-05-16 2022-03-31 13F TRANSMEDICS GROUP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F TRANSMEDICS GROUP COM Put 16,300 -8.43 317 -43.99 n/a n/a n/a
2021-11-12 2021-09-30 13F TRANSMEDICS GROUP COM Put 17,800 13.38 566 9.48 n/a n/a n/a
2021-08-06 2021-06-30 13F TRANSMEDICS GROUP COM Put 15,700 517 n/a n/a n/a
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.