AMSC (AMSC) Institutional Ownership Changes & 13F Activity

AMSC. Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC and Polen Capital Management.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCSell-184,000139,989$4,028,883
Q4 2025Polen Capital ManagementSell-23,72623,565$678,201
Q3 2025Renaissance Technologies LLCBuy165,600323,989$19,241,707
Q3 2025Polen Capital ManagementBuy7047,291$2,808,612
Q2 2025Polen Capital ManagementBuy47,22147,221$1,732,538
Q3 2024Renaissance Technologies LLCSell-29,600158,389$3,737,980
Q2 2024Renaissance Technologies LLCBuy74,500187,989$4,397,063
Q1 2024Renaissance Technologies LLCBuy44,000113,489$1,533
Q2 2023Renaissance Technologies LLCBuy12,88969,489$435
Q1 2023Renaissance Technologies LLCSell-45,58956,600$278
Q4 2022Renaissance Technologies LLCSell-34,700102,189$376
Q3 2022Renaissance Technologies LLCBuy95,200136,889$600
Q2 2022Renaissance Technologies LLCSell-38,20041,689$216
Q1 2022Renaissance Technologies LLCBuy36,08179,889$608
Q3 2021Renaissance Technologies LLCSell-300,74643,808$639
Q2 2021Renaissance Technologies LLCSell-271,921344,554$5,992
Q1 2021Renaissance Technologies LLCSell-300,500616,475$11,688
Q4 2020Renaissance Technologies LLCSell-252,442916,975$21,476
Q3 2020Renaissance Technologies LLCSell-112,9001,169,417$16,933
Q2 2020Renaissance Technologies LLCBuy121,9001,282,317$10,425
Q1 2020Renaissance Technologies LLCSell-74,2001,160,417$6,359
Q4 2019Renaissance Technologies LLCSell-14,5411,234,617$9,692
Q3 2019Renaissance Technologies LLCBuy91,2251,249,158$9,793
Q2 2019Renaissance Technologies LLCBuy415,2861,157,933$10,746
Q1 2019Renaissance Technologies LLCBuy628,689742,647$9,550
Q4 2018Renaissance Technologies LLCBuy42,200113,958$1,271
Q3 2018Renaissance Technologies LLCSell-241,93071,758$499
Q1 2018Renaissance Technologies LLCSell-194,900313,688$1,826
Q4 2017Renaissance Technologies LLCSell-45,700508,588$1,846
Q3 2017Renaissance Technologies LLCBuy68,100554,288$2,516

Frequently asked questions about AMSC activity

  • Which institutional owners are buying AMSC?

    Institutional owners buying AMSC include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in AMSC activity?

    "Buy" means an investor increased their reported position in AMSC compared to the prior reporting period. This reflects growing exposure to AMSC rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in AMSC increasing?

    Institutional interest in AMSC can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

Related AMSC Institutional Insights