Jim Simons
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Jim Simons’s Marathon Digital Holdings MARA Stock Holding History

Jim Simons’s Portfolio MARA Stock Details MARA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$15.4M Buy
+1,111,938
New +$13.9M 0.02% 832
2026
Q1 		– Sell
-1,858,838
Closed -$16.7M – 3511
2025
Q4 		$16.7M Sell
1,858,838
-1,021,500
-35% -$15.1M 0.03% 690
2025
Q3 		$52.6M Buy
2,880,338
+1,070,900
+59% +$18M 0.07% 334
2025
Q2 		$28.4M Buy
+1,809,438
New +$25.9M 0.04% 563
2023
Q2 		– Sell
-90,204
Closed -$787K – 4123
2023
Q1 		$787K Buy
+90,204
New +$630K ﹤0.01% 2628
2022
Q3 		– Sell
-1,636,538
Closed -$8.74M – 4266
2022
Q2 		$8.74M Buy
1,636,538
+1,224,300
+297% +$16.4M 0.01% 1183
2022
Q1 		$11.5M Sell
412,238
-1,005,200
-71% -$26.1M 0.01% 1037
2021
Q4 		$46.6M Buy
1,417,438
+1,271,500
+871% +$60.8M 0.06% 360
2021
Q3 		$4.61M Sell
145,938
-1,522,900
-91% -$49.5M 0.01% 1518
2021
Q2 		$52.4M Buy
1,668,838
+100,800
+6% +$3.2M 0.07% 315
2021
Q1 		$75.3M Buy
+1,568,038
New +$48.6M 0.09% 228
2020
Q2 		– Sell
-16,100
Closed -$7K – 3635
2020
Q1 		$7K Buy
+16,100
New +$14.2K ﹤0.01% 3394
2017
Q1 		– Sell
-5,250
Closed -$144K – 3328
2016
Q4 		$144K Buy
5,250
+3,806
+264% +$125K ﹤0.01% 3056
2016
Q3 		$65K Buy
1,444
+738
+105% +$34.2K ﹤0.01% 3227
2016
Q2 		$31K Buy
+706
New +$24.9K ﹤0.01% 3263
2015
Q3 		– Sell
-4,281
Closed -$199K – 3277
2015
Q2 		$199K Buy
+4,281
New +$337K ﹤0.01% 2986

Other funds holding MARA

BlackRock
BlackRock New York $6.73T AUM 46.02% 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
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Marex Group
Marex Group London $23.6B AUM 57.16% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Jim Simons's MARA Position: Q2 2026 in Review

Jim Simons opened a new position in Marathon Digital Holdings (MARA) in Q2 2026: 1,111,938 shares worth $15.4M. The stake represents 0.02% of the portfolio and ranks #832 among its holdings. This is a return to the name: Jim Simons previously reported a position in MARA as recently as Q4 2025.

Jim Simons first reported a position in MARA in Q2 2015 and has held it in 16 quarters since. The position peaked at $75.3M in Q1 2021. 416 funds tracked by Wall St. Rank hold MARA as of Q2 2026.

  • Jim Simons held 1,111,938 shares of Marathon Digital Holdings worth $15.4M as of Q2 2026.
  • Marathon Digital Holdings was a new Jim Simons position in Q2 2026.
  • Marathon Digital Holdings made up 0.02% of Jim Simons's portfolio in Q2 2026, its #832 holding.
  • Jim Simons first reported a position in Marathon Digital Holdings in Q2 2015 and has held it in 16 quarters since.
  • Jim Simons's Marathon Digital Holdings position peaked at $75.3M in Q1 2021.
  • 416 funds tracked by Wall St. Rank held Marathon Digital Holdings as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.