Mobix Labs, Inc. (MOBX) Ownership
MOBX ownership summary
as of October 18, 2026- Institutions
- 10.0% of shares outstanding
- Insiders
- 11.11% of shares outstanding
- Shares outstanding
- 18.0M
- Float
- 14.6M shares available to trade
- Short interest
- 11.13% 1.9M shares short
- Days to cover
- 0.23 short interest up 21.1% vs prior month
- Institutions 10.01%
- Insiders 11.11%
- Other investors 78.87%
MOBX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 2.56% | 459K | $348,960 | +459,158 (0.0%) | June 30, 2026 |
| 2 | Vanguard Capital Wealth Advisors | 1.14% | 204K | $154,868 | +58,432 (+40.2%) | June 30, 2026 |
| 3 | Jane Street Group LLC | 0.90% | 161K | $122,147 | +157,697 (+5,216.6%) | June 30, 2026 |
| 4 | Geode Capital Management, LLC | 0.62% | 112K | $85,029 | +12,688 (+12.8%) | June 30, 2026 |
| 5 | UBS Group AG | 0.52% | 93K | $70,630 | +39,155 (+72.8%) | June 30, 2026 |
| 6 | CI Private Wealth LLC | 0.49% | 88K | $67,039 | +88,209 (0.0%) | June 30, 2026 |
| 7 | Alessandra Capital Management, LLC | 0.38% | 69K | $52,280 | — | June 30, 2026 |
| 8 | State Street Corp | 0.29% | 53K | $39,999 | — | June 30, 2026 |
| 9 | Vanguard Fiduciary Trust Co | 0.29% | 52K | $39,557 | +52,049 (0.0%) | June 30, 2026 |
| 10 | BlackRock Inc | 0.19% | 34K | $25,874 | +34,045 (0.0%) | June 30, 2026 |
| 11 | Virtu Financial LLC | 0.18% | 33K | $25,135 | +33,072 (0.0%) | June 30, 2026 |
| 12 | Bank of America Corp | 0.14% | 25K | $19,176 | +25,231 (0.0%) | June 30, 2026 |
| 13 | Northern Trust Corp | 0.11% | 19K | $14,723 | +48 (+0.2%) | June 30, 2026 |
| 14 | Mariner Wealth Advisors LLC | 0.09% | 16K | $11,801 | +1,982 (+14.6%) | June 30, 2026 |
| 15 | Krilogy Advisors LLC | 0.06% | 10K | $7,753 | +9,181 (+900.1%) | June 30, 2026 |
| 16 | MASSMUTUAL TRUST CO FSB/ADV | 0.01% | 1,700 | $1,292 | +1,700 (0.0%) | June 30, 2026 |
| 17 | SBI Securities Co Ltd | <0.01% | 698 | $530 | +443 (+173.7%) | June 30, 2026 |
| 18 | Hanson Mcclain Inc | <0.01% | 555 | $422 | +555 (0.0%) | June 30, 2026 |
| 19 | HARBOUR INVESTMENTS, INC. | <0.01% | 464 | $353 | +84 (+22.1%) | June 30, 2026 |
| 20 | Barclays PLC | <0.01% | 217 | $165 | +217 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 18 holders added 974K shares and 0 cut 0.
MOBX top mutual fund and ETF holders
6 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.00% | 360K | $273,343 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.32% | 58K | $44,158 | +11,313 (+24.2%) | August 31, 2026 |
| 3 | iShares Micro-Cap ETF | 0.25% | 45K | $34,077 | −309 (−0.7%) | September 30, 2026 |
| 4 | Fidelity Series Total Market Index | 0.07% | 12K | $9,185 | — | August 31, 2026 |
| 5 | Fidelity Total Market Index | 0.07% | 12K | $8,905 | +613 (+5.5%) | August 31, 2026 |
| 6 | 1290 VT Micro Cap K | 0.01% | 2,176 | $1,654 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MOBX insider transactions
latest 3| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-05 | Keyvan Samini | Sell | $3.20 | 21,167 | $67,734 |
| 2025-11-21 | James Aralis | Sell | $4.10 | 2,247 | $9,213 |
| 2025-08-26 | James Aralis | Sell | $9.20 | 1,819 | $16,735 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MOBX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MOBX
Institutional investors own 10.0% of Mobix Labs's shares and insiders 11.11%. The largest holder is Vanguard Capital Management, LLC with 2.56% of the shares (459K), as of June 30, 2026. Among the top 20 institutions, 18 added shares and 0 reduced their stake in the latest filings. Short interest is 11.13% of the float, or 0.23 days of average trading volume. The share count rose 354.1% since 2021.
Related: MOBX key metrics. See the MOBX stock overview for the latest quote and news.
MOBX ownership FAQ
Who owns the most Mobix Labs stock?
The largest shareholders of Mobix Labs are Vanguard Capital Management, LLC (2.56%), Vanguard Capital Wealth Advisors (1.14%), Jane Street Group LLC (0.90%), Geode Capital Management, LLC (0.62%), UBS Group AG (0.52%).
What percentage of Mobix Labs is owned by institutions?
Institutions hold 10.0% of Mobix Labs's shares outstanding; insiders hold 11.11%.
Which funds own Mobix Labs?
The largest fund holders of Mobix Labs are Vanguard MStar Total Stk Mkt Idx Invest (2.00%), Fidelity Extended Market Index (0.32%), iShares Micro-Cap ETF (0.25%), Fidelity Series Total Market Index (0.07%), Fidelity Total Market Index (0.07%).
What is Mobix Labs's short interest?
1.9M shares of Mobix Labs were sold short, 11.13% of the float; at the average daily volume it would take 0.23 days to cover.
Are insiders buying or selling Mobix Labs?
Of the latest 3 reported insider transactions in Mobix Labs (since August 26, 2025), 0 were purchases and 3 were sales.
How many shares of Mobix Labs are outstanding?
Mobix Labs has 18.0M shares outstanding, of which 14.6M are in the public float.