ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in AMSC — American Superconductor Corp /De/
CIK 1164508
BOSTON, MA
Position in AMSC
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$9,584,783
-$5,537,772 QoQ
Shares Held
230,903
-48.3% QoQ
Ownership
0.477%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#35
of 276 holders
Holding Since
Jun 2020
11 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AMSC Over Time
Shares Held
Position Value (USD)
Position in Specialty Industrial Machinery
Industrials · as of Jun 30, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $2,588,958,275 across 32 Specialty Industrial Machinery names. AMSC ranks #22 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GEV |
GE Vernova Inc.
|
635,016 | $746,054,897 | |
| 2 | ITW |
Illinois Tool Works Inc
|
1,363,751 | $368,853,732 | |
| 3 | ROK |
Rockwell Automation, Inc
|
571,467 | $282,921,882 | |
| 4 | GNRC |
Generac Holdings Inc.
|
887,621 | $259,904,305 | |
| 5 | IEX |
Idex Corp /De/
|
717,081 | $162,741,532 | |
| 6 | AME |
Ametek Inc/
|
528,019 | $127,748,916 | |
| 7 | GGG |
Graco Inc
|
1,650,927 | $124,826,590 | |
| 8 | MIDD |
MIDDLEBY Corp
|
741,641 | $102,630,421 |
All Filings in AMSC
Export CSV
11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $9,584,783 | 230,903 | Shares | Defined | 2026-08-13 | |
| 2026-03-31 | $15,122,555 | 446,752 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $19,662,553 | 683,202 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $45,163,541 | 760,457 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $8,673,369 | 236,396 | Shares | Defined | 2025-08-13 | |
| 2024-12-31 | $7,309,986 | 296,792 | Shares | Defined | 2025-02-12 | |
| 2024-06-30 | $1,333,557 | 57,014 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $1,809,029 | 133,903 | Shares | Defined | 2024-05-15 | |
| 2020-12-31 | $5,253,152 | 224,302 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $3,743,804 | 258,550 | Shares | Defined | 2020-11-12 | |
| 2020-06-30 | $597,563 | 73,501 | Shares | Defined | 2020-08-12 | |
| No filing history on record for this holder in this stock. | ||||||