Ken Griffin
AMSC icon

Ken Griffin’s American Superconductor AMSC Stock Holding History

Ken Griffin’s Portfolio AMSC Stock Details AMSC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$7.34M Sell
216,713
-121,000
-36% -$3.82M ﹤0.01% 3726
2025
Q4 		$9.72M Buy
337,713
+322,892
+2,179% +$14M ﹤0.01% 3290
2025
Q3 		$880K Sell
14,821
-674,870
-98% -$33.7M ﹤0.01% 7810
2025
Q2 		$25.3M Buy
689,691
+558,130
+424% +$13.7M ﹤0.01% 1875
2025
Q1 		$2.39M Sell
131,561
-128,278
-49% -$3.2M ﹤0.01% 5187
2024
Q4 		$6.4M Sell
259,839
-36,218
-12% -$999K ﹤0.01% 3577
2024
Q3 		$6.99M Sell
296,057
-84,738
-22% -$1.95M ﹤0.01% 3430
2024
Q2 		$8.91M Buy
380,795
+48,398
+15% +$799K ﹤0.01% 2918
2024
Q1 		$4.49M Buy
332,397
+70,167
+27% +$870K ﹤0.01% 4108
2023
Q4 		$2.92M Buy
262,230
+141,902
+118% +$1.2M ﹤0.01% 4686
2023
Q3 		$908K Buy
120,328
+63,182
+111% +$524K ﹤0.01% 6776
2023
Q2 		$358K Buy
57,146
+9,970
+21% +$48.6K ﹤0.01% 8657
2023
Q1 		$232K Buy
47,176
+4,083
+9% +$20.5K ﹤0.01% 9908
2022
Q4 		$159K Buy
43,093
+9,274
+27% +$36.3K ﹤0.01% 10527
2022
Q3 		$148K Sell
33,819
-26,340
-44% -$136K ﹤0.01% 10710
2022
Q2 		$312K Sell
60,159
-37,743
-39% -$219K ﹤0.01% 9714
2022
Q1 		$745K Buy
97,902
+35,410
+57% +$303K ﹤0.01% 8416
2021
Q4 		$680K Buy
62,492
+17,640
+39% +$254K ﹤0.01% 8907
2021
Q3 		$654K Buy
44,852
+32,481
+263% +$450K ﹤0.01% 9235
2021
Q2 		$215K Buy
12,371
+315
+3% +$5.04K ﹤0.01% 11999
2021
Q1 		$228K Sell
12,056
-20,731
-63% -$513K ﹤0.01% 11446
2020
Q4 		$768K Buy
32,787
+1,585
+5% +$28.1K ﹤0.01% 7337
2020
Q3 		$451K Sell
31,202
-14,439
-32% -$161K ﹤0.01% 7476
2020
Q2 		$371K Buy
45,641
+12,195
+36% +$79.7K ﹤0.01% 7563
2020
Q1 		$183K Buy
33,446
+9,525
+40% +$65.3K ﹤0.01% 8097
2019
Q4 		$188K Sell
23,921
-9,175
-28% -$73.9K ﹤0.01% 8238
2019
Q3 		$259K Buy
33,096
+2,121
+7% +$18K ﹤0.01% 7775
2019
Q2 		$287K Buy
30,975
+16,195
+110% +$172K ﹤0.01% 7649
2019
Q1 		$190K Buy
+14,780
New +$201K ﹤0.01% 8242
2018
Q4 		– Sell
-12,952
Closed -$111K – 9038
2018
Q3 		$90K Sell
12,952
-16,982
-57% -$101K ﹤0.01% 8615
2018
Q2 		$210K Buy
+29,934
New +$196K ﹤0.01% 7807
2018
Q1 		– Sell
-25,418
Closed -$130K – 8229
2017
Q4 		$92K Buy
+25,418
New +$97K ﹤0.01% 7459
2017
Q3 		– Sell
-11,845
Closed -$46K – 7487
2017
Q2 		$55K Buy
11,845
+494
+4% +$2.51K ﹤0.01% 7071
2017
Q1 		$78K Buy
11,351
+513
+5% +$3.45K ﹤0.01% 6935
2016
Q4 		$80K Buy
+10,838
New +$81.2K ﹤0.01% 6752
2015
Q3 		– Sell
-16,442
Closed -$77.3K – 8849
2015
Q2 		$86K Buy
+16,442
New +$109K ﹤0.01% 7228
2015
Q1 		– Sell
-5,005
Closed -$37K – 8488
2014
Q4 		$37K Buy
5,005
+1,019
+26% +$10.8K ﹤0.01% 7404
2014
Q3 		$56K Buy
3,986
+299
+8% +$5.11K ﹤0.01% 6830
2014
Q2 		$60K Buy
3,687
+131
+4% +$1.87K ﹤0.01% 6630
2014
Q1 		$57K Buy
3,556
+553
+18% +$9.87K ﹤0.01% 6667
2013
Q4 		$49K Sell
3,003
-3,434
-53% -$63.9K ﹤0.01% 6046
2013
Q3 		$151K Buy
6,437
+2,890
+81% +$73.2K ﹤0.01% 5010
2013
Q2 		$94K Buy
+3,547
New +$89.3K ﹤0.01% 5272

Other funds holding AMSC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
N
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
OAM
Oberweis Asset Management Lisle, Illinois $3.39B AUM 105.5% 1-Year Est. Return
AIC
AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

Ken Griffin's AMSC Position: Q1 2026 in Review

Ken Griffin reduced its American Superconductor (AMSC) stake by 36% in Q1 2026, selling an estimated $3.82M and leaving 216,713 shares worth $7.34M. The position accounts for ﹤0.01% of the portfolio, ranked #3726.

Ken Griffin first reported a position in AMSC in Q2 2013 and has held it in 43 quarters since. The position peaked at $25.3M in Q2 2025. 244 funds tracked by Wall St. Rank hold AMSC as of Q1 2026.

  • Ken Griffin held 216,713 shares of American Superconductor worth $7.34M as of Q1 2026.
  • Ken Griffin sold 121,000 American Superconductor shares in Q1 2026, an estimated $3.82M.
  • American Superconductor made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #3726 holding.
  • Ken Griffin first reported a position in American Superconductor in Q2 2013 and has held it in 43 quarters since.
  • Ken Griffin's American Superconductor position peaked at $25.3M in Q2 2025.
  • 244 funds tracked by Wall St. Rank held American Superconductor as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.