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United States Biotechnology & Medical Research

MBX Biosciences Inc (MBX)

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Over the last 90 days, MBX Biosciences Inc. has seen significant insider selling activity, with a net value of over $5 million. Notably, former officer Richard Bartram and Chief Medical Officer Salomon Azoulay have been involved in numerous proposed and planned sales. The company's stock has experienced a modest 6.9% increase over the same period.
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Ticker: MBX Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Bartram Richard
Former Officer
1 sale — total 100,000 USD
Proposed sale 10 Jun 2026
Value US$3,369,547.52 | Price 425.30 | Shares 76,218
Proposed sale 9 Jun 2026
Value US$1,363,658.13 | Price 383.73 | Shares 80,025
Proposed sale 9 Jun 2026
Value US$3,098,787.99 | Price 398.24 | Shares 67,472
Proposed sale 13 May 2026
Value US$554,295.75 | Price 36.95 | Shares 15,000
Proposed sale 11 May 2026
Value US$991,901.00 | Price 44.08 | Shares 22,500
Planned sale 8 May 2026
Value US$574,614.90 | Price 38.30 | Shares 15,003
Planned sale 8 May 2026
Value US$2,110,900.00 | Price 38.38 | Shares 55,000
Proposed sale 8 May 2026
Value US$2,685,678.84 | Price 38.37 | Shares 70,003
Proposed sale 8 May 2026
Value US$379,562.50 | Price 37.96 | Shares 10,000
Proposed sale 7 May 2026
Value US$322,050.00 | Price 32.21 | Shares 10,000
Sale 6 May 2026
Value US$6,823.74 | Price 29.54 | Shares 231
Proposed sale 6 May 2026
Value US$6,824.78 | Price 29.54 | Shares 231
Sale 6 May 2026
Value US$17,930.78 | Price 29.54 | Shares 607
Proposed sale 6 May 2026
Value US$17,933.51 | Price 29.54 | Shares 607
Proposed sale 1 May 2026
Value US$159,000.00 | Price 31.80 | Shares 5,000
Proposed sale 22 Apr 2026
Value US$341,377.75 | Price 32.75 | Shares 10,423
Proposed sale 25 Mar 2026
Value US$30,217.49 | Price 28.48 | Shares 1,061
Proposed sale 16 Mar 2026
Value US$300,470.62 | Price 30.05 | Shares 10,000
Buy 13 Mar 2026
Value US$525,662.70 | Price 28.41 | Shares 18,500
Proposed sale 12 Jan 2026
Value US$1,102,991.13 | Price 35.74 | Shares 30,864
Buy 20 Oct 2025
Value US$272,790.00 | Price 13.64 | Shares 20,000
Buy 17 Oct 2025
Value US$264,984.00 | Price 13.25 | Shares 20,000
Buy 26 Sep 2025
Value US$11,999,988.00 | Price 18.00 | Shares 666,666
Buy 8 Apr 2025
Value US$45,311.77 | Price 5.89 | Shares 7,693
Buy 18 Feb 2025
Value US$1,020,044.00 | Price 10.84 | Shares 94,100
Buy 18 Feb 2025
Value US$531,918.80 | Price 10.84 | Shares 49,070
Buy 18 Feb 2025
Value US$1,020,044.00 | Price 10.84 | Shares 94,100
Buy 18 Feb 2025
Value US$531,918.80 | Price 10.84 | Shares 49,070
Buy 14 Feb 2025
Value US$290,969.00 | Price 9.85 | Shares 29,540
Buy 14 Feb 2025
Value US$177,823.80 | Price 9.90 | Shares 17,962
Buy 14 Feb 2025
Value US$290,969.00 | Price 9.85 | Shares 29,540
Buy 14 Feb 2025
Value US$177,823.80 | Price 9.90 | Shares 17,962
Buy 4 Feb 2025
Value US$534,500.00 | Price 10.69 | Shares 50,000
Buy 16 Sep 2024
Value US$10,000,000.00 | Price 16.00 | Shares 625,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$4,000,000.00 | Price 16.00 | Shares 250,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Buy 16 Sep 2024
Value US$10,000,000.00 | Price 16.00 | Shares 625,000
Buy 16 Sep 2024
Value US$12,000,000.00 | Price 16.00 | Shares 750,000
Buy 16 Sep 2024
Value US$4,000,000.00 | Price 16.00 | Shares 250,000
Buy 16 Sep 2024
Value US$8,000,000.00 | Price 16.00 | Shares 500,000
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-10 2026-06-10 PrS Proposed sale
Bartram Richard

Former Officer

Officer
76,218
425.30
US$3,369,548 		76,218 425.30 US$3,369,548
2026-06-09 2026-06-09 PrS Proposed sale
Bartram Richard

Former Officer

Officer
80,025
383.73
US$1,363,658 		80,025 383.73 US$1,363,658
2026-06-09 2026-06-09 PrS Proposed sale
Bartram Richard

Former Officer

Officer
67,472
398.24
US$3,098,788 		67,472 398.24 US$3,098,788
2026-05-13 2026-05-13 PrS Proposed sale
Bartram Richard

Former Officer

Officer
15,000
36.95
US$554,296 		15,000 36.95 US$554,296
2026-05-11 2026-05-11 PrS Proposed sale
Bartram Richard

Former Officer

Officer
22,500
44.08
US$991,901 		22,500 44.08 US$991,901
2026-05-11 2026-05-08 PlS Planned sale
Azoulay Salomon

Chief Medical Officer

Officer
15,003 -50.4%
38.30
US$574,615 		15,003 -50.4% 38.30 US$574,615
2026-05-11 2026-05-08 PlS Planned sale
Azoulay Salomon

Chief Medical Officer

Officer
55,000 -78.8%
38.38
US$2,110,900 		55,000 -78.8% 38.38 US$2,110,900
2026-05-08 2026-05-08 PrS Proposed sale
Azoulay Salomon

Officer

Officer
70,003
38.37
US$2,685,679 		70,003 38.37 US$2,685,679
2026-05-08 2026-05-08 PrS Proposed sale
Bartram Richard

Former Officer

Officer
10,000
37.96
US$379,562 		10,000 37.96 US$379,562
2026-05-07 2026-05-07 PrS Proposed sale
Bartram Richard

Former Officer

Officer
10,000
32.21
US$322,050 		10,000 32.21 US$322,050
2026-05-08 2026-05-06 S Sale
Azoulay Salomon

Chief Medical Officer

Officer
231 -1.5%
29.54
US$6,824 		231 -1.5% 29.54 US$6,824
2026-05-08 2026-05-06 S Sale
3.5
Hawryluk P. Kent

President & CEO

Executive Director
607 -0.1%
29.54
US$17,931 		607 -0.1% 29.54 US$17,931
2026-05-06 2026-05-06 PrS Proposed sale
3.5
Hawryluk P. Kent

Officer; Director

Executive Director
607
29.54
US$17,934 		607 29.54 US$17,934
2026-05-06 2026-05-06 PrS Proposed sale
Azoulay Salomon

Officer

Officer
231
29.54
US$6,825 		231 29.54 US$6,825
2026-05-01 2026-05-01 PrS Proposed sale
Bartram Richard

Former Officer

Officer
5,000
31.80
US$159,000 		5,000 31.80 US$159,000
2026-04-22 2026-04-22 PrS Proposed sale
Bartram Richard

Former Officer

Officer
10,423
32.75
US$341,378 		10,423 32.75 US$341,378
2026-03-25 2026-03-25 PrS Proposed sale
Bartram Richard

Former Officer

Officer
1,061
28.48
US$30,217 		1,061 28.48 US$30,217
2026-03-16 2026-03-16 PrS Proposed sale
Bartram Richard

Former Officer

Officer
10,000
30.05
US$300,471 		10,000 30.05 US$300,471
2026-03-16 2026-03-13 B Purchase
3.5
Hawryluk P. Kent

President & CEO

Executive Director
18,500 +4.0%
28.41
US$525,663 		18,500 +4.0% 28.41 US$525,663
2026-01-12 2026-01-12 PrS Proposed sale
CORNELIUS JAMES M

Former Director

Non-Executive Director
30,864
35.74
US$1,102,991 		30,864 35.74 US$1,102,991
2025-10-21 2025-10-20 B Purchase
3.5
Hawryluk P. Kent

President & CEO

Executive Director
20,000 +4.5%
13.64
US$272,790 		20,000 +4.5% 13.64 US$272,790
2025-10-20 2025-10-17 B Purchase
3.7
Hoerter Steven L.
Non-Executive Director
20,000 +inf%
13.25
US$264,984 		20,000 +inf% 13.25 US$264,984
2025-09-30 2025-09-26 B Purchase
3.8
Heron Patrick J
Non-Executive Director Large shareholder
666,666 +14.6%
18.00
US$11,999,988 		666,666 +14.6% 18.00 US$11,999,988
2025-04-10 2025-04-08 B Purchase
3.4
Pescovitz Ora H.
Non-Executive Director
7,693 +46.2%
5.89
US$45,312 		7,693 +46.2% 5.89 US$45,312
2025-02-19 2025-02-18 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
94,100 +14.4%
10.84
US$1,020,044 		94,100 +14.4% 10.84 US$1,020,044
2025-02-19 2025-02-18 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
49,070 +1.5%
10.84
US$531,919 		49,070 +1.5% 10.84 US$531,919
2025-02-19 2025-02-18 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
94,100 +14.4%
10.84
US$1,020,044 		94,100 +14.4% 10.84 US$1,020,044
2025-02-19 2025-02-18 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
49,070 +1.5%
10.84
US$531,919 		49,070 +1.5% 10.84 US$531,919
2025-02-19 2025-02-14 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
29,540 +0.9%
9.85
US$290,969 		29,540 +0.9% 9.85 US$290,969
2025-02-19 2025-02-14 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
17,962 +0.6%
9.90
US$177,824 		17,962 +0.6% 9.90 US$177,824
2025-02-19 2025-02-14 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
29,540 +0.9%
9.85
US$290,969 		29,540 +0.9% 9.85 US$290,969
2025-02-19 2025-02-14 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
17,962 +0.6%
9.90
US$177,824 		17,962 +0.6% 9.90 US$177,824
2025-02-05 2025-02-04 B Purchase
3.5
Hawryluk P. Kent

President & CEO

Executive Director
50,000 +12.6%
10.69
US$534,500 		50,000 +12.6% 10.69 US$534,500
2024-09-17 2024-09-16 B Purchase
0.8
Frazier Life Sciences X, L.P.
Large shareholder
625,000 +15.9%
16.00
US$10,000,000 		625,000 +15.9% 16.00 US$10,000,000
2024-09-17 2024-09-16 B Purchase
3.1
Yang Rick
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
New Enterprise Associates 17, L.P.
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
2.4
SANDELL SCOTT D
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
2.6
Florence Anthony A. Jr.
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
250,000 +61.9%
16.00
US$4,000,000 		250,000 +61.9% 16.00 US$4,000,000
2024-09-17 2024-09-16 B Purchase
2.6
ORBIMED ADVISORS LLC
Non-Executive Director Large shareholder
500,000 +18.8%
16.00
US$8,000,000 		500,000 +18.8% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
2.5
BASKETT FOREST
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
3.5
Chang Carmen
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
2.7
Makhzoumi Mohamad
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
3.9
Walker Paul Edward
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
3.1
Mathers Edward T
Non-Executive Director Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
1.5
Behbahani Ali
Large shareholder
500,000 +16.1%
16.00
US$8,000,000 		500,000 +16.1% 16.00 US$8,000,000
2024-09-17 2024-09-16 B Purchase
3.8
Heron Patrick J
Non-Executive Director Large shareholder
625,000 +15.9%
16.00
US$10,000,000 		625,000 +15.9% 16.00 US$10,000,000
2024-09-17 2024-09-16 B Purchase
Aynechi Tiba
Non-Executive Director
750,000 +54.1%
16.00
US$12,000,000 		750,000 +54.1% 16.00 US$12,000,000
2024-09-17 2024-09-16 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
250,000 +61.9%
16.00
US$4,000,000 		250,000 +61.9% 16.00 US$4,000,000
2024-09-17 2024-09-16 B Purchase
1.5
GORDON CARL L
Non-Executive Director Large shareholder
500,000 +18.8%
16.00
US$8,000,000 		500,000 +18.8% 16.00 US$8,000,000
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