SC Filed 2021-02-08 Event — SEC 0001213900-21-007430 →

QMCO

Stake: — Shares: —

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)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

10 13D/G filings on this issuer

9 other filings besides this one

Filer Track Record

54 filings by this filer

53 other filings in the data moat

Short Interest · settle 2026-03-31

DTC 5.12

1,796,279 shares short · -11.2% vs prior

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

Filed	Form	Filer	Stake	Shares
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 →
2020-04-29	SC	B. Riley Financial, Inc.	—	—	view →
2020-03-11	SC	VIEX Capital Advisors, LLC	—	—	view →

Other Filings by B. Riley Financial, Inc.

Filed	Form	Issuer	Stake	Shares
2025-09-03	SCHEDULE	TRANSACT TECHNOLOGIES INC TACT	5.90%	600,010	view →
2025-04-02	SCHEDULE	TRANSACT TECHNOLOGIES INC TACT	8.30%	826,745	view →
2025-04-02	SCHEDULE	Babcock & Wilcox Enterprises, Inc. BW-PA	13.50%	13,246,373	view →
2024-10-01	SC	SYNCHRONOSS TECHNOLOGIES INC	—	—	view →
2024-07-15	SC	Babcock & Wilcox Enterprises, Inc. BW-PA	—	—	view →
2024-07-02	SC	SYNCHRONOSS TECHNOLOGIES INC	—	—	view →
2023-06-02	SC	B. Riley Principal 250 Merger Corp.	—	—	view →
2023-03-13	SC	SYNCHRONOSS TECHNOLOGIES INC	—	—	view →
2022-11-14	SC	Lazydays Holdings, Inc.	—	—	view →
2022-10-11	SC	TRANSACT TECHNOLOGIES INC TACT	—	—	view →
2022-10-11	SC	Lazydays Holdings, Inc.	—	—	view →
2022-07-18	SC	Arena Group Holdings, Inc. AREN	—	—	view →
2022-07-07	SC	Lazydays Holdings, Inc.	—	—	view →
2022-06-10	SC	QUANTUM CORP /DE/ QMCO	—	—	view →
2022-04-14	SC	TRANSACT TECHNOLOGIES INC TACT	—	—	view →
2022-03-15	SC	SYNCHRONOSS TECHNOLOGIES INC	—	—	view →
2022-02-25	SC	Arena Group Holdings, Inc. AREN	—	—	view →
2022-02-16	SC	Arena Group Holdings, Inc. AREN	—	—	view →
2022-02-08	SC	ALTA EQUIPMENT GROUP INC. ALTG-PA	—	—	view →
2022-02-01	SC	Exela Technologies, Inc.	—	—	view →

Showing 20 of 53

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