MBX | MBX BIO | Owners

S&P 500$7,619.38
+1.31%
2m
DOW 30$52,486.49
+0.49%
2m
NASDAQ 100$28,374.25
+2.28%
2m
Russell 2000$283.09
+0.89%
2m
Russell 1000$415.99
+1.25%
2m
S&P 400$3,731.96
+0.84%
2m
S&P 600$1,730.00
+0.80%
2m

MBX BIO (MBX)

NASDAQ

$55.44-$2.28 (-3.95%)

Price as of Nov 12, 2026 10:02 AM EST

$2.8B
Market Cap
134.63%
1-Year Change
Biotechnology
Industry

Top Holders

Institutional

Mutual Funds

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
FMR LLC	14.84%	7.4M	+2.0M (+27.76%)	Sep 30, 2026
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.	13.40%	6.7M	0 (0.00%)	Jun 30, 2026
WELLINGTON MANAGEMENT GROUP LLP	10.02%	5.0M	+1.8M (+35.88%)	Jun 30, 2026
NEA MANAGEMENT COMPANY, LLC	7.28%	3.6M	0 (0.00%)	Jun 30, 2026
ORBIMED ADVISORS LLC	6.90%	3.4M	-209,151 (-6.10%)	Jun 30, 2026
BLACKROCK, INC.	6.69%	3.3M	+382,266 (+11.50%)	Jun 30, 2026
PARADIGM BIOCAPITAL ADVISORS LP	5.05%	2.5M	+2.5M (+100.00%)	Jun 30, 2026

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
VANGUARD INDEX FUNDS	2.90%	1.4M	-322 (-0.02%)	Jun 30, 2026
FIDELITY ADVISOR SERIES VII	2.31%	1.1M	+541,000 (+47.22%)	Jul 31, 2026
FIDELITY SECURITIES FUND	2.01%	997,830	+249,080 (+24.96%)	Jul 31, 2026
FIDELITY SELECT PORTFOLIOS	1.85%	920,900	+247,800 (+26.91%)	Aug 31, 2026
MUTUAL FUND SERIES TRUST	1.76%	873,492	-16,508 (-1.89%)	Jun 30, 2026
FIDELITY CAPITAL TRUST	1.28%	636,100	+216,200 (+33.99%)	Jul 31, 2026
T. Rowe Price Health Sciences Fund, Inc.	1.18%	586,309	-135,000 (-23.03%)	Jun 30, 2026

Current Ownership Distribution

Institutions288.8M (84.30%)
Mutual Funds52.8M (15.42%)
Insiders976,831 (0.29%)
Other0 (0.00%)

Insider Transactions

0.29% (976,831)
Current InsiderOwnership (%, shares)
1
Number of InsiderBuying (last 12 months)
$13.3M
Amount of InsiderBuying (last 12 months)
2
Number of InsiderSelling (last 12 months)
$4.7M
Amount of InsiderSelling (last 12 months)

Insider Name & Title	Type	Date	Transaction Value	Shares	Share Price	Shares After Transactions
Hoerter Steven L. Chairman, President and CEO	Sell	Nov 10, 2026	$268,234.26	4,893	$54.82	78,045
Azoulay Salomon Chief Medical Officer	Sell	Nov 04, 2026	$20,127.08	373	$53.96	14,026
Radovich Peter	Award	Oct 20, 2026	$0.00	18,200	$0.00	18,200
Hawryluk P. Kent President & CEO	Buy	Mar 13, 2026	$525,662.70	18,500	$28.41	486,777
Hawryluk P. Kent President & CEO	Exempt	Feb 26, 2026	$0.00	28,768	$0.00	91,668
Hawryluk P. Kent President & CEO	Exempt	Feb 26, 2026	$460,288.00	28,768	$16.00	728,274
Hawryluk P. Kent President & CEO	Award	Feb 02, 2026	$0.00	164,500	$0.00	164,500
Bartram Richard Chief Financial Officer	Award	Feb 02, 2026	$0.00	70,000	$0.00	70,000
Hawryluk P. Kent President & CEO	Award	Feb 02, 2026	$0.00	35,250	$0.00	699,506
Azoulay Salomon Chief Medical Officer	Award	Feb 02, 2026	$0.00	70,000	$0.00	70,000
Bartram Richard Chief Financial Officer	Award	Feb 02, 2026	$0.00	15,000	$0.00	15,000
Azoulay Salomon Chief Medical Officer	Award	Feb 02, 2026	$0.00	15,000	$0.00	15,000
Stelzer Laurie	Award	Jan 20, 2026	$0.00	32,000	$0.00	32,000
Hoerter Steven L.	Buy	Oct 17, 2025	$264,984.00	20,000	$13.25	20,000
Heron Patrick J	Buy	Sep 26, 2025	$12.0M	666,666	$18.00	5.2M
Pescovitz Ora H.	Buy	Apr 08, 2025	$45,311.77	7,693	$5.89	24,329
GORDON CARL L	Buy	Feb 18, 2025	$531,918.80	49,070	$10.84	3.3M
ORBIMED ADVISORS LLC	Buy	Feb 18, 2025	$531,918.80	49,070	$10.84	3.3M
GORDON CARL L	Buy	Feb 18, 2025	$1.0M	94,100	$10.84	747,887
ORBIMED ADVISORS LLC	Buy	Feb 18, 2025	$1.0M	94,100	$10.84	747,887
GORDON CARL L	Buy	Feb 14, 2025	$177,823.80	17,962	$9.90	3.2M
ORBIMED ADVISORS LLC	Buy	Feb 14, 2025	$177,823.80	17,962	$9.90	3.2M
GORDON CARL L	Buy	Feb 14, 2025	$290,969.00	29,540	$9.85	3.2M
ORBIMED ADVISORS LLC	Buy	Feb 14, 2025	$290,969.00	29,540	$9.85	3.2M
Hawryluk P. Kent President & CEO	Buy	Feb 04, 2025	$534,500.00	50,000	$10.69	448,277
Azoulay Salomon Chief Medical Officer	Award	Feb 03, 2025	$0.00	90,000	$0.00	90,000
Bartram Richard Chief Financial Officer	Award	Feb 03, 2025	$0.00	95,000	$0.00	95,000
Hawryluk P. Kent President & CEO	Award	Feb 03, 2025	$0.00	243,000	$0.00	243,000