SC Filed 2019-05-17 Event — SEC 0001144204-19-027112 →

Fortress Biotech, Inc. → MUSTANG BIO, INC. MBIO

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

5 13D/G filings on this issuer

4 other filings besides this one

Filer Track Record

11 filings by this filer

10 other filings in the data moat

Short Interest · settle 2026-07-15

DTC 1.45

60,867 shares short · -40.6% vs prior

Other 13D/G Filings on MUSTANG BIO, INC.

Filed	Form	Filer	Stake	Shares
2026-01-05	SCHEDULE	Fortress Biotech, Inc.	8.00%	537,243	view →
2025-10-01	SCHEDULE	Fortress Biotech, Inc.	4.00%	258,858	view →
2025-04-02	SCHEDULE	Fortress Biotech, Inc.	7.90%	199,191	view →
2025-01-03	SCHEDULE	Fortress Biotech, Inc.	12.40%	6,569,450	view →

Other Filings by Fortress Biotech, Inc.

Filed	Form	Issuer	Stake	Shares
2026-01-06	SCHEDULE	AVENUE THERAPEUTICS, INC. ATXI	13.40%	439,955	view →
2026-01-05	SCHEDULE	MUSTANG BIO, INC. MBIO	8.00%	537,243	view →
2025-10-01	SCHEDULE	MUSTANG BIO, INC. MBIO	4.00%	258,858	view →
2025-04-02	SCHEDULE	AVENUE THERAPEUTICS, INC. ATXI	10.30%	328,746	view →
2025-04-02	SCHEDULE	MUSTANG BIO, INC. MBIO	7.90%	199,191	view →
2025-01-03	SCHEDULE	Checkpoint Therapeutics, Inc.	13.50%	6,903,749	view →
2025-01-03	SCHEDULE	MUSTANG BIO, INC. MBIO	12.40%	6,569,450	view →
2025-01-03	SCHEDULE	AVENUE THERAPEUTICS, INC. ATXI	13.80%	295,022	view →
2024-10-01	SC	Checkpoint Therapeutics, Inc.	—	—	view →
2023-07-06	SC	Checkpoint Therapeutics, Inc.	—	—	view →

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