SEC ownership of MUSTANG BIO, INC.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001680048.

Comparable stake leader

Fortress Biotech, Inc.

Disclosed value leader

Fortress Biotech, Inc.

Comparable rows

30/35

Latest evidence

30 Jun 2026

Top shareholders Insider holders Latest transactions

Public ticker: MBIO on Nasdaq
Parsed ownership sources: 13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: Fortress Biotech, Inc.
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 30 of 35
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: Fortress Biotech, Inc.
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 30 Jun 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0001680048
Issuer location: Waltham, MA

Ownership snapshot

Top shareholders of MUSTANG BIO, INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Fortress Biotech, Inc.

Disclosed value leader

Fortress Biotech, Inc.

Comparable rows

30/35

Latest evidence

30 Jun 2026

13D/G 3/4/5 13F Lead comparable stake: 8% 5 rows are not safely comparable across share classes. 13D/G row: Fortress Biotech, Inc. Showing 1-8 of 35 holder rows.

Quick read

Fortress Biotech, Inc. leads the comparable SEC ownership view at 8%.

30 of 35 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Fortress Biotech, Inc.'s linked filing trail.

Comparable ownership Top 5

Fortress Biotech, Inc. 8%

INTRACOASTAL CAPITAL, LLC 5%

ARMISTICE CAPITAL, LLC 5%

Manuel Litchman MD 0.02%

Adam J. Chill 0.01%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 35 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Fortress Biotech, Inc.	13D/G 3/4/5 10%+ Owner 13D/G 3/4/5	8%	$698,416 537,243 shares	+$361,900	02 Jan 2026
INTRACOASTAL CAPITAL, LLC	13D/G Mitchell P. Kopin 13D/G	5%	$491,647 185,527 shares	-$134,951	30 Jun 2025
ARMISTICE CAPITAL, LLC	13D/G 13D/G	5%	$149,887 129,213 shares	-$5,773,406	31 Mar 2025
Manuel Litchman MD	3/4/5 President, CEO and Interim CFO, Director 3/4/5	0.02%	$1,076 1,615 shares	—	24 Apr 2026
Adam J. Chill	3/4/5 Director 3/4/5	0.01%	$358 375 shares	-$4	30 Dec 2025
David Jin	3/4/5 Director 3/4/5	0%	$275 286 shares	+$238	30 Dec 2025
Neil Herskowitz	3/4/5 Director 3/4/5	0%	$139 145 shares	-$238	30 Dec 2025
Kestra Advisory Services, LLC	13F Company 13F	2.9%	$138,288 196,991 shares	—	30 Jun 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$3.82.

Buys

$238

Insiders: 1

Sells

$241

Insiders: 2

Net

-$3.82

Shares: -4

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 247 Shares: 251

Window (months)	Buy shares	Sell shares	Buy value	Sell value	Net value
0-3	0	0	$0	$0	$0
3-6	0	0	$0	$0	$0
6-9	247	251	$238	$241	-$3.82
9-12	0	0	$0	$0	$0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-12 of 12 reporting-owner rows connected to MUSTANG BIO, INC.. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

Fortress Biotech, Inc.

Net 12M change

-$4

Latest report

24 Apr 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Fortress Biotech, Inc.	10%+ Owner	$697,550			Mixed	02 Jan 2026
Brian Achenbach	SVP, Fin. & Corp. Controller	$74,738			Mixed	08 Dec 2021
Lindsay A. Rosenwald MD	Director	$31,255			Mixed	05 Jul 2023
Michael S. Weiss	Director	$25,633			Mixed	05 Jul 2023
Michael J. Zelefsky	Director	$9,796			Mixed	05 Jul 2023
Peter J. Carney	Interim Chief Accounting Officer, Exhibit 24 - Power of Attorney	$2,061			Mixed	11 Dec 2023
Manuel Litchman MD	President, CEO and Interim CFO, Director	$1,076			Mixed	24 Apr 2026
Adam J. Chill	Director	$358	-$4	-1.1%	Filing P/S	30 Dec 2025
David Jin	Director	$275	+$238	+643%	Filing P/S	30 Dec 2025
Neil Herskowitz	Director	$139	-$238	-63%	Filing P/S	30 Dec 2025
Eliot M. Lurier	Interim CFO				Mixed	18 Apr 2022
James B. Murphy	Interim CFO				Mixed	19 Jan 2024

Recent insider transactions for MUSTANG BIO, INC.

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
Manuel Litchman MD	MBIO	COMMON STOCK	Tax liability	-1.16%			-19	1,615	24 Apr 2026	Direct
Fortress Biotech, Inc.	MBIO	COMMON STOCK, PAR VALUE $0.0001	Award	107.8%			278,385	536,577	02 Jan 2026	Direct
Neil Herskowitz	MBIO	COMMON STOCK, PAR VALUE $0.0001	Sale	-63%	$238	$0.9620	-247	145	30 Dec 2025	Direct
Adam J. Chill	MBIO	COMMON STOCK, PAR VALUE $0.0001	Sale	-1.06%	$3.82	$0.9548	-4	375	30 Dec 2025	Direct
David Jin	MBIO	COMMON STOCK, PAR VALUE $0.0001	Purchase	633.3%	$238	$0.9620	247	286	30 Dec 2025	Direct
Fortress Biotech, Inc.	MBIO	COMMON STOCK, PAR VALUE $0.0001	Award	29.8%			59,334	258,192	29 Sep 2025	Direct

^* marks a reported price that did not pass the local price check.

SEC ownership of MUSTANG BIO, INC.

Top shareholders of MUSTANG BIO, INC. (13F + 13D/G + 3/4/5)

Fortress Biotech, Inc. leads the comparable SEC ownership view at 8%.

Insider trading overview

Insider holders from Forms 3/4/5

Continue from MUSTANG BIO, INC. ownership

Recent insider transactions for MUSTANG BIO, INC.