How shorted is MBX Biosciences, Inc. right now?

10.92% of MBX Biosciences, Inc.'s (MBX) shares outstanding were reported short for settlement date 31 Jul 2026, per FINRA's consolidated short interest report.

What does this number include?

FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.

Why does it only update twice a month?

US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.

Which funds are short?

US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.

How shorted is MBX Biosciences, Inc.?

More shorted than 83% of the 2,877 ranked US companies

10.92%

of shares outstanding reported short · settlement date 31 Jul 2026

vs previous report: −1.24
5 reports (~10 weeks): +1.90

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<iframe src="https://howshorted.com/embed/us/mbx/" width="100%" height="430" style="border:0" loading="lazy" title="MBX Biosciences, Inc. short interest chart"></iframe>
<p>Source: FINRA data compiled by <a href="https://howshorted.com/us/company/mbx/">howshorted.com</a></p>

Cite this page

Short position data for MBX Biosciences, Inc.: FINRA, compiled by howshorted.com, settlement date 31 Jul 2026. https://howshorted.com/us/company/mbx/

History

Settlement date	Short %	Change
31 Jul 2026	10.92%	−1.24
15 Jul 2026	12.16%	−0.25
30 Jun 2026	12.41%	+0.39
15 Jun 2026	12.02%	+1.89
29 May 2026	10.13%	+1.11
15 May 2026	9.02%	+0.53
30 Apr 2026	8.49%	+0.52
15 Apr 2026	7.97%	+0.41
31 Mar 2026	7.56%	+1.28
13 Mar 2026	6.28%	+0.95
27 Feb 2026	5.33%	+0.42
13 Feb 2026	4.91%	+0.53
30 Jan 2026	4.38%	−0.76
15 Jan 2026	5.14%	−3.42
31 Dec 2025	8.56%	+0.52
15 Dec 2025	8.04%	−1.09
28 Nov 2025	9.13%	−1.18
14 Nov 2025	10.31%	−3.33
31 Oct 2025	13.64%	+2.00
15 Oct 2025	11.64%	+0.03
30 Sep 2025	11.61%	−0.97
15 Sep 2025	12.58%	+1.14
29 Aug 2025	11.44%	−0.66
15 Aug 2025	12.10%	−3.88
31 Jul 2025	15.98%	–

Frequently asked questions

How shorted is MBX Biosciences, Inc. right now?: 10.92% of MBX Biosciences, Inc.'s (MBX) shares outstanding were reported short for settlement date 31 Jul 2026, per FINRA's consolidated short interest report.
What does this number include?: FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?: US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Which funds are short?: US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.