William Blair & Company
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William Blair & Company’s Transmedics TMDX Stock Holding History

William Blair & Company’s Portfolio TMDX Stock Details TMDX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$17.3M Buy
174,017
+38,128
+28% +$4.97M 0.05% 260
2025
Q4 		$16.5M Buy
135,889
+78,446
+137% +$9.84M 0.04% 266
2025
Q3 		$6.45M Sell
57,443
-11,044
-16% -$1.29M 0.02% 460
2025
Q2 		$9.18M Sell
68,487
-6,508
-9% -$715K 0.03% 364
2025
Q1 		$5.05M Sell
74,995
-105,569
-58% -$7.26M 0.02% 480
2024
Q4 		$11.3M Buy
180,564
+44,610
+33% +$4.15M 0.03% 319
2024
Q3 		$21.3M Sell
135,954
-26,774
-16% -$4.13M 0.06% 222
2024
Q2 		$24.5M Sell
162,728
-20,796
-11% -$2.49M 0.08% 198
2024
Q1 		$13.6M Buy
183,524
+24,417
+15% +$2.01M 0.04% 286
2023
Q4 		$12.6M Buy
159,107
+152,563
+2,331% +$9.2M 0.04% 279
2023
Q3 		$358K Buy
+6,544
New +$471K ﹤0.01% 1156

Other funds holding TMDX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
NAMI
Nomura Asset Management International Philadelphia, Pennsylvania $58.4B AUM
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

William Blair & Company's TMDX Position: Q1 2026 in Review

William Blair & Company increased its Transmedics (TMDX) stake by 28% in Q1 2026, buying an estimated $4.97M and bringing the position to 174,017 shares worth $17.3M. The position accounts for 0.05% of the portfolio, ranked #260.

William Blair & Company first reported a position in TMDX in Q3 2023 and has held it in 11 quarters since. The position peaked at $24.5M in Q2 2024. 414 funds tracked by Wall St. Rank hold TMDX as of Q1 2026.

  • William Blair & Company held 174,017 shares of Transmedics worth $17.3M as of Q1 2026.
  • William Blair & Company bought 38,128 Transmedics shares in Q1 2026, an estimated $4.97M.
  • Transmedics made up 0.05% of William Blair & Company's portfolio in Q1 2026, its #260 holding.
  • William Blair & Company first reported a position in Transmedics in Q3 2023 and has held it in 11 quarters since.
  • William Blair & Company's Transmedics position peaked at $24.5M in Q2 2024.
  • 414 funds tracked by Wall St. Rank held Transmedics as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.