William Blair & Company
MRTN icon

William Blair & Company’s Marten Transport MRTN Stock Holding History

William Blair & Company’s Portfolio MRTN Stock Details MRTN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$402K Buy
23,158
+358
+2% +$5.69K ﹤0.01% 1299
2026
Q1 		$299K Hold
22,800
– – ﹤0.01% 1337
2025
Q4 		$259K Hold
22,800
– – ﹤0.01% 1363
2025
Q3 		$243K Hold
22,800
– – ﹤0.01% 1390
2025
Q2 		$296K Hold
22,800
– – ﹤0.01% 1270
2025
Q1 		$313K Hold
22,800
– – ﹤0.01% 1244
2024
Q4 		$356K Hold
22,800
– – ﹤0.01% 1216
2024
Q3 		$404K Hold
22,800
– – ﹤0.01% 1186
2024
Q2 		$421K Sell
22,800
-93
-0.4% -$1.63K ﹤0.01% 1148
2024
Q1 		$423K Buy
22,893
+93
+0.4% +$1.79K ﹤0.01% 1130
2023
Q4 		$478K Hold
22,800
– – ﹤0.01% 1083
2023
Q3 		$449K Hold
22,800
– – ﹤0.01% 1092
2023
Q2 		$490K Hold
22,800
– – ﹤0.01% 1059
2023
Q1 		$478K Hold
22,800
– – ﹤0.01% 1065
2022
Q4 		$451K Hold
22,800
– – ﹤0.01% 1074
2022
Q3 		$437K Hold
22,800
– – ﹤0.01% 1090
2022
Q2 		$383K Sell
22,800
-95
-0.4% -$1.63K ﹤0.01% 1164
2022
Q1 		$407K Buy
22,895
+95
+0.4% +$1.66K ﹤0.01% 1241
2021
Q4 		$391K Hold
22,800
– – ﹤0.01% 1312
2021
Q3 		$358K Buy
+22,800
New +$358K ﹤0.01% 1284

Other funds holding MRTN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair & Company's MRTN Position: Q2 2026 in Review

William Blair & Company increased its Marten Transport (MRTN) stake by 1.6% in Q2 2026, buying an estimated $5.69K and bringing the position to 23,158 shares worth $402K. The position accounts for ﹤0.01% of the portfolio, ranked #1299.

William Blair & Company first reported a position in MRTN in Q3 2021 and has held it in 20 quarters since. The position peaked at $490K in Q2 2023. 229 funds tracked by Wall St. Rank hold MRTN as of Q2 2026.

  • William Blair & Company held 23,158 shares of Marten Transport worth $402K as of Q2 2026.
  • William Blair & Company bought 358 Marten Transport shares in Q2 2026, an estimated $5.69K.
  • Marten Transport made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1299 holding.
  • William Blair & Company first reported a position in Marten Transport in Q3 2021 and has held it in 20 quarters since.
  • William Blair & Company's Marten Transport position peaked at $490K in Q2 2023.
  • 229 funds tracked by Wall St. Rank held Marten Transport as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.