Security key
030111207
AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC)
CUSIP: 030111207
Q1 2018 13F Holders as of 31 Mar 2018
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 5,080,052
- Total 13F value
- $29,559,017
- Share change
- -210,495
- Put/Call ratio
- 70%
- SEC-reported price per share
- $5.82
- Number of holders
- 49
- Value change
- -$388,303
- Number of buys
- 21
- Number of sells
- 21
- Shares outstanding
- 47,694,720
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2018
Institutions
49
Top holders
10
AMSC full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2018
Previous quarter: Q4 2017
AMERICAN SUPERCONDUCTOR CORP /DE/ SEC filings
AMERICAN SUPERCONDUCTOR CORP /DE/ company facts
Broader feeds
Reporting periods
Holder history for CUSIP 030111207
Recent filing periods:
Ownership snapshot
Top reported holders of AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
AWM Investment Company, Inc.
Disclosed value leader
AWM Investment Company, Inc.
Comparable rows
15/15
Latest evidence
31 Dec 2017
13F
Lead comparable stake: 2.4%
Showing 1-6 of 15 holder rows.
Quick read
AWM Investment Company, Inc. leads the comparable SEC ownership view at 2.4%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens AWM Investment Company, Inc.'s linked filing trail.
Comparable ownership
Top 5
AWM Investment Company, Inc.
2.4%
VANGUARD GROUP INC
1.2%
Telemark Asset Management, LLC
1.1%
RENAISSANCE TECHNOLOGIES LLC
1.1%
ROYCE & ASSOCIATES LP
0.77%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| AWM Investment Company, Inc. |
13F
Company
|
2.4%
|
$4,179,000
1,151,252 shares
|
— | 31 Dec 2017 |
| VANGUARD GROUP INC |
13F
Company
|
1.2%
|
$2,026,000
557,987 shares
|
— | 31 Dec 2017 |
| Telemark Asset Management, LLC |
13F
Company
|
1.1%
|
$1,975,000
544,044 shares
|
— | 31 Dec 2017 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
1.1%
|
$1,846,000
508,588 shares
|
— | 31 Dec 2017 |
| ROYCE & ASSOCIATES LP |
13F
Company
|
0.77%
|
$1,341,000
369,300 shares
|
— | 31 Dec 2017 |
| ARDSLEY ADVISORY PARTNERS LP |
13F
Company
|
0.66%
|
$1,141,000
314,377 shares
|
— | 31 Dec 2017 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2018
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
49
Shares
5,080,052
Rows available
49
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2018 vs Q4 2017 Across Filers
Q4 2017 holders
46
Q1 2018 holders
49
Holder diff
3
| Investor | Q4 2017 Shares | Q1 2018 Shares | Share Diff | Share Chg % | Q4 2017 value | Q1 2018 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend