Ostin Technology Group Co., Ltd. (OST) Ownership
OST ownership summary
as of October 17, 2026- Institutions
- 1.0% of shares outstanding
- Insiders
- 15.79% of shares outstanding
- Shares outstanding
- 6.0M
- Float
- 5.0M shares available to trade
- Short interest
- 2.96% 176K shares short
- Days to cover
- 2.65 short interest down 0.0% vs prior month
- Institutions 0.98%
- Insiders 15.79%
- Other investors 83.23%
OST top institutional holders
11 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Citadel Advisors Llc | 0.58% | 35K | $58,735 | — | June 30, 2026 |
| 2 | HRT FINANCIAL LLC | 0.23% | 14K | $22,969 | — | June 30, 2026 |
| 3 | UBS Group AG | 0.04% | 2,656 | $4,502 | — | June 30, 2026 |
| 4 | Morgan Stanley - Brokerage Accounts | 0.04% | 2,629 | $4,456 | — | June 30, 2026 |
| 5 | Banque Cantonale Vaudoise | 0.04% | 2,088 | $3,539 | +2,088 (0.0%) | June 30, 2026 |
| 6 | BlackRock Inc | 0.02% | 1,320 | $2,237 | — | June 30, 2026 |
| 7 | Integrated Wealth Concepts LLC | 0.01% | 761 | $1,290 | +761 (0.0%) | June 30, 2026 |
| 8 | Federation des caisses Desjardins du Quebec | 0.01% | 403 | $683 | — | June 30, 2026 |
| 9 | Wells Fargo & Co | <0.01% | 160 | $271 | — | June 30, 2026 |
| 10 | FNY Investment Advisers, LLC | 0.00% | — | — | −23,163 (−100.0%) | March 31, 2026 |
| 11 | Barclays PLC | 0.00% | — | — | −495 (−100.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 11, 2 holders added 2,849 shares and 2 cut 24K.
OST top mutual fund and ETF holders
2 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Nasdaq Composite Index | 0.04% | 2,608 | $4,421 | — | August 31, 2026 |
| 2 | Selectra Shield Opportunities A EUR Acc | 0.04% | 2,600 | $4,407 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OST shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OST
Institutional investors own 1.0% of Ostin Technology's shares and insiders 15.79%. The largest holder is Citadel Advisors Llc with 0.58% of the shares (35K), as of June 30, 2026. Among the top 11 institutions, 2 added shares and 2 reduced their stake in the latest filings. Short interest is 2.96% of the float, or 2.65 days of average trading volume. The share count fell 77.4% since 2018.
Related: OST key metrics. See the OST stock overview for the latest quote and news.
OST ownership FAQ
Who owns the most Ostin Technology stock?
The largest shareholders of Ostin Technology are Citadel Advisors Llc (0.58%), HRT FINANCIAL LLC (0.23%), UBS Group AG (0.04%), Morgan Stanley - Brokerage Accounts (0.04%), Banque Cantonale Vaudoise (0.04%).
What percentage of Ostin Technology is owned by institutions?
Institutions hold 1.0% of Ostin Technology's shares outstanding; insiders hold 15.79%.
Which funds own Ostin Technology?
The largest fund holders of Ostin Technology are Fidelity Nasdaq Composite Index (0.04%), Selectra Shield Opportunities A EUR Acc (0.04%).
What is Ostin Technology's short interest?
176K shares of Ostin Technology were sold short, 2.96% of the float; at the average daily volume it would take 2.65 days to cover.
How many shares of Ostin Technology are outstanding?
Ostin Technology has 6.0M shares outstanding, of which 5.0M are in the public float.