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Marathon Trading Investment Management’s CarMax KMX Stock Holding History

Marathon Trading Investment Management’s Portfolio KMX Stock Details KMX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-23,627
Closed -$913K – 340
2025
Q4 		$913K Buy
+23,627
New +$945K 0.02% 152
2023
Q1 		– Sell
-15,293
Closed -$931K – 302
2022
Q4 		$931K Buy
+15,293
New +$982K 0.11% 109
2020
Q3 		– Sell
-2,400
Closed -$215K – 273
2020
Q2 		$215K Buy
+2,400
New +$188K 0.03% 161

Other funds holding KMX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
SV
Starboard Value New York $4.52B AUM 19.34% 1-Year Est. Return
SIM
SRS Investment Management New York $10.8B AUM 34.05% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Marathon Trading Investment Management's KMX Position: Q1 2026 in Review

Marathon Trading Investment Management sold out of CarMax (KMX) in Q1 2026, closing a stake of 23,627 shares — an estimated $913K sold.

Marathon Trading Investment Management first reported a position in KMX in Q2 2020 and held it in 3 quarters. The position peaked at $931K in Q4 2022. 550 funds tracked by Wall St. Rank hold KMX as of Q1 2026.

  • Marathon Trading Investment Management reported no remaining CarMax position as of Q1 2026 after selling out during the quarter.
  • Marathon Trading Investment Management sold 23,627 CarMax shares in Q1 2026, an estimated $913K.
  • Marathon Trading Investment Management first reported a position in CarMax in Q2 2020 and held it in 3 quarters.
  • Marathon Trading Investment Management's CarMax position peaked at $931K in Q4 2022.
  • 550 funds tracked by Wall St. Rank held CarMax as of Q1 2026.

Based on Marathon Trading Investment Management's 13F filing for Q1 2026, filed 14 May 2026.