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ISSUER PROFILE · CIK 0000720500 · CUSIP 032332504

Amtech Systems Inc.ASYS

6 13D/G filings 4 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
+0.8%
avg +0.8%
Median 60d
-23.3%
avg -23.3%
Median 90d
-29.0%
avg -29.0%
Median 180d
-5.5%
avg -5.5%

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
6
1 SCHEDULE 13D/A · 1 SCHEDULE · 4 SC
Distinct filers
4
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.00
as of 2026-05-29

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $855K
Point72 Asset Mgmt

13D/G Filings Timeline · 6 total

FiledFormFilerStakeSharesIntent
2026-06-02 SCHEDULE 13D/A PITON CAPITAL PARTNERS LLC 20.60% 600,000 view →
2025-02-18 SCHEDULE PITON CAPITAL PARTNERS LLC 20.20% 2,894,588 view →
2022-02-24 SC PITON CAPITAL PARTNERS LLC view →
2020-01-30 SC Privet Fund LP view →
2018-07-17 SC Schreyer Leslie J view →
2018-01-03 SC ROYCE & ASSOCIATES LP view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-05-29 308,970 1.00 -9.6%
2026-05-15 341,947 1.00 +3.6%
2026-04-30 329,978 1.23 +8.5%
2026-04-15 304,130 1.62 +6.8%
2026-03-31 284,641 1.45 -13.4%
2026-03-13 328,529 2.06 -11.6%
2026-02-27 371,558 2.20 -6.3%
2026-02-13 396,353 1.00 -8.8%
2026-01-30 434,402 1.00 +16.6%
2026-01-15 372,390 1.37 +18.0%
2025-12-31 315,528 1.13 +40.4%
2025-12-15 224,717 1.16 +8.8%

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