Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in OST held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | 35K | $44K | 0.0% | 0.581% | 0.00% |
| 2 | UBS Group AG | 3K | $5K | 0.0% | 0.044% | 0.00% |
| 3 | MORGAN STANLEY | 3K | $4K | 0.0% | 0.044% | 0.00% |
| 4 | BARCLAYS PLC | 495 | $839 | 0.0% | 0.008% | 0.00% |
| 5 | Federation des caisses Desjardins du Quebec | 403 | $683 | 0.0% | 0.007% | 0.00% |
| 6 | WELLS FARGO & COMPANY/MN | 160 | $271 | 0.0% | 0.003% | 0.00% |
| 7 | HRT FINANCIAL LP | 14K | $22 | 0.0% | 0.227% | 0.00% |
| 8 | BlackRock, Inc. | 1K | $0 | 0.0% | 0.022% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in OST — a direct measure of their conviction.
Filings activity in OST during Q1 2026, grouped by how each filer changed its position.
No institutions trimmed their position this quarter.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 8 | 20% | 0.54% | +0.00 pp | $0M | 0.1% |
| Q4 2025 | 10 | +11% | 0.54% | 0.17 pp | $0M | 24% |
| Q3 2025 | 9 | 50% | 0.71% | 7.71 pp | $0M | 92% |
| Q2 2025 | 18 | +350% | 8.42% | +8.22 pp | $1M | +4089% |
| Q1 2025 | 4 | +0.0% | 0.20% | +0.07 pp | $0M | +52% |
| Q4 2024 | 4 | 33% | 0.13% | 0.07 pp | $0M | 35% |
| Q3 2024 | 6 | +20% | 0.20% | +0.04 pp | $0M | +24% |
| Q2 2024 | 5 | — | 0.16% | — | $0M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying OST stock.
Based on Q1 2026 13F filings, institutional ownership of Ostin Technology Group Co., Ltd. stands at 0.5%, held across 8 reporting institutions.
CITADEL ADVISORS LLC is the largest reported institutional holder of OST, with approximately 34,652 shares worth $0.00B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of OST, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for OST is 30 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
0 institutions opened new positions in OST during Q1 2026, while 2 fully exited. 1 added to existing positions and 0 trimmed.
OST institutional ownership rose by 0.00 percentage points quarter-over-quarter, with a net change of -2 holders.
The top 10 institutions account for 100.0% of all reported 13F value in OST, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Ostin Technology Group Co., Ltd. (OST) Institutional Ownership