TOMI Environmental Solutions, Inc. (TOMZ) Ownership
TOMZ ownership summary
as of October 18, 2026- Institutions
- 3.7% of shares outstanding
- Insiders
- 25.00% of shares outstanding
- Shares outstanding
- 9.8M
- Float
- 5.8M shares available to trade
- Short interest
- 0.27% 24K shares short
- Days to cover
- 0.17 short interest down 18.9% vs prior month
- Institutions 3.70%
- Insiders 25.00%
- Other investors 71.29%
TOMZ top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 2.05% | 601K | $883,257 | −78,386 (−11.5%) | June 30, 2026 |
| 2 | Geode Capital Management, LLC | 0.43% | 125K | $184,379 | −2,620 (−2.0%) | June 30, 2026 |
| 3 | Citadel Advisors Llc | 0.37% | 109K | $159,864 | +108,751 (0.0%) | June 30, 2026 |
| 4 | Vanguard Fiduciary Trust Co | 0.25% | 74K | $109,417 | +34,841 (+88.0%) | June 30, 2026 |
| 5 | State Street Corp | 0.18% | 52K | $76,747 | — | June 30, 2026 |
| 6 | Northern Trust Corp | 0.08% | 22K | $32,512 | +6,282 (+39.7%) | June 30, 2026 |
| 7 | Virtu Financial LLC | 0.07% | 21K | $30,480 | +20,735 (0.0%) | June 30, 2026 |
| 8 | RSM US WEALTH MANAGEMENT LLC | 0.06% | 17K | $25,646 | −1,600 (−8.4%) | June 30, 2026 |
| 9 | XTX Topco Ltd | 0.06% | 17K | $24,293 | +16,526 (0.0%) | June 30, 2026 |
| 10 | Citigroup Inc | 0.05% | 15K | $21,853 | +14,850 (+92,812.5%) | June 30, 2026 |
| 11 | TWO SIGMA SECURITIES, LLC | 0.04% | 13K | $18,960 | +12,898 (0.0%) | June 30, 2026 |
| 12 | Advisor Group Holdings, Inc. | 0.03% | 10K | $14,700 | +10,000 (0.0%) | June 30, 2026 |
| 13 | Vanguard Global Advisers, LLC | 0.02% | 4,432 | $6,515 | — | June 30, 2026 |
| 14 | Tower Research Capital LLC | 0.01% | 4,237 | $6,228 | +305 (+7.8%) | June 30, 2026 |
| 15 | UBS Group AG | 0.01% | 2,500 | $3,675 | −1,562 (−38.5%) | June 30, 2026 |
| 16 | Mercer Global Advisors Inc. | <0.01% | 233 | $343 | +233 (0.0%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 0.00% | 1 | $1 | −1 (−50.0%) | June 30, 2026 |
| 18 | SBI Securities Co Ltd | 0.00% | 1 | $1 | −1 (−50.0%) | June 30, 2026 |
| 19 | Hanson Mcclain Inc | 0.00% | — | — | −344 (−100.0%) | June 30, 2026 |
| 20 | Susquehanna International Group, LLP | 0.00% | — | — | −66,827 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 225K shares and 8 cut 151K.
TOMZ top mutual fund and ETF holders
6 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.61% | 158K | $232,408 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.25% | 24K | $35,624 | −130 (−0.5%) | August 31, 2026 |
| 3 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.12% | 12K | $17,950 | — | August 31, 2026 |
| 4 | Fidelity Series Total Market Index | 0.06% | 6,253 | $9,192 | — | August 31, 2026 |
| 5 | Fidelity Total Market Index | 0.04% | 3,787 | $5,567 | — | August 31, 2026 |
| 6 | Vanguard U.S. Eq Idx £ Acc | 0.02% | 1,478 | $2,173 | +1 (+0.1%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
TOMZ insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2023-08-22 | Dr. Halden Stuart Shane | Buy | $1.20 | 2,503 | $3,004 |
| 2023-08-18 | Dr. Halden Stuart Shane | Buy | $1.07 | 3,000 | $3,210 |
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.
TOMZ shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns TOMZ
Institutional investors own 3.7% of TOMI Environmental Solutions's shares and insiders 25.00%. The largest holder is Vanguard Capital Management, LLC with 2.05% of the shares (601K), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 8 reduced their stake in the latest filings. Short interest is 0.27% of the float, or 0.17 days of average trading volume. The share count rose 26.1% since 2014.
Related: TOMZ analyst forecast, TOMZ key metrics. See the TOMZ stock overview for the latest quote and news.
TOMZ ownership FAQ
Who owns the most TOMI Environmental Solutions stock?
The largest shareholders of TOMI Environmental Solutions are Vanguard Capital Management, LLC (2.05%), Geode Capital Management, LLC (0.43%), Citadel Advisors Llc (0.37%), Vanguard Fiduciary Trust Co (0.25%), State Street Corp (0.18%).
What percentage of TOMI Environmental Solutions is owned by institutions?
Institutions hold 3.7% of TOMI Environmental Solutions's shares outstanding; insiders hold 25.00%.
Which funds own TOMI Environmental Solutions?
The largest fund holders of TOMI Environmental Solutions are Vanguard MStar Total Stk Mkt Idx Invest (1.61%), Fidelity Extended Market Index (0.25%), Vanguard MStar Inst Ttl StkMktIdxInstlPl (0.12%), Fidelity Series Total Market Index (0.06%), Fidelity Total Market Index (0.04%).
What is TOMI Environmental Solutions's short interest?
24K shares of TOMI Environmental Solutions were sold short, 0.27% of the float; at the average daily volume it would take 0.17 days to cover.
Are insiders buying or selling TOMI Environmental Solutions?
Of the latest 2 reported insider transactions in TOMI Environmental Solutions (since August 18, 2023), 2 were purchases and 0 were sales.
How many shares of TOMI Environmental Solutions are outstanding?
TOMI Environmental Solutions has 9.8M shares outstanding, of which 5.8M are in the public float.