SC Filed 2020-03-11 Event — SEC 0000921895-20-000707 →

QMCO

Stake: — Shares: —

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 6/100

Passive Schedule 13G filer baseline

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

4 transactions

1 buys · 0 sales · 0 awards/exercises

Issuer Cluster

11 13D/G filings on this issuer

10 other filings besides this one

Filer Track Record

35 filings by this filer

34 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 1.57

3,072,986 shares short · -1.6% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-06-04	FICHTHORN JOHN	director, 10%+ owner	C	11,020,645	$5.19	$57.24M
2026-06-04	FICHTHORN JOHN	director, 10%+ owner	Award	3,083,975	$5.19	$16.02M
2026-06-04	FICHTHORN JOHN	director, 10%+ owner	C	57,241,228	$5.19	$297.31M
2026-06-01	FICHTHORN JOHN	director, 10%+ owner	J	105,911	$5.19	$550K

Other 13D/G Filings on QUANTUM CORP /DE/

Filed	Form	Filer	Stake	Shares
2026-06-08	SCHEDULE 13D/A	Dialectic Technology SPV LLC	40.00%	16,863,839	view →
2026-01-12	SCHEDULE	Dialectic Technology SPV LLC	41.40%	9,691,228	view →
2025-02-21	SCHEDULE	Blue Torch Capital LP	2.30%	135,763	view →
2025-01-07	SCHEDULE	PACIFIC INVESTMENT MANAGEMENT CO LLC	16.70%	962,127	view →
2023-07-14	SC	PACIFIC INVESTMENT MANAGEMENT CO LLC	—	—	view →
2022-08-12	SC	PACIFIC INVESTMENT MANAGEMENT CO LLC	—	—	view →
2022-06-10	SC	B. Riley Financial, Inc.	—	—	view →
2021-04-28	SC	B. Riley Financial, Inc.	—	—	view →
2021-02-08	SC	B. Riley Financial, Inc.	—	—	view →
2020-04-29	SC	B. Riley Financial, Inc.	—	—	view →

Other Filings by VIEX Capital Advisors, LLC

Filed	Form	Issuer	Stake	Shares
2021-11-03	SC	A10 Networks, Inc. ATEN	—	—	view →
2021-07-09	SC	KVH INDUSTRIES INC \DE\ KVHI	—	—	view →
2021-06-22	SC	KVH INDUSTRIES INC \DE\ KVHI	—	—	view →
2021-05-14	SC	LEAF GROUP LTD.	—	—	view →
2021-05-12	SC	LEAF GROUP LTD.	—	—	view →
2021-05-06	SC	KVH INDUSTRIES INC \DE\ KVHI	—	—	view →
2021-04-19	SC	KVH INDUSTRIES INC \DE\ KVHI	—	—	view →
2021-04-07	SC	LEAF GROUP LTD.	—	—	view →
2021-01-20	SC	LEAF GROUP LTD.	—	—	view →
2020-09-11	SC	IMMERSION CORP IMMR	—	—	view →
2020-09-04	SC	IMMERSION CORP IMMR	—	—	view →
2020-03-09	SC	IMMERSION CORP IMMR	—	—	view →
2020-01-14	SC	RED ROBIN GOURMET BURGERS INC RRGB	—	—	view →
2019-12-31	SC	IMMERSION CORP IMMR	—	—	view →
2019-11-21	SC	A10 Networks, Inc. ATEN	—	—	view →
2019-09-13	SC	Arlo Technologies, Inc. ARLO	—	—	view →
2019-08-19	SC	A10 Networks, Inc. ATEN	—	—	view →
2019-07-30	SC	A10 Networks, Inc. ATEN	—	—	view →
2019-07-29	SC	IMMERSION CORP IMMR	—	—	view →
2019-06-05	SC	A10 Networks, Inc. ATEN	—	—	view →

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