Security record · archived quarter
TARK
name pending profile ingest
2Tracked holders
-1Δ holders
26.76KShares held
$943,050Reported value
+1New positions
−2Exits
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Optiver Holding B.V. | 23.89K | +566.6% | $841,972 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | Simplex Trading, Llc | 2.87K | New | $101,078 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Simplex Trading, Llc | $101,078 | 0.0% |
Exited
| Susquehanna International… | $558,374 | was 0.0% |
| Belvedere Trading LLC | $14,565 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 2 holders, 26.76K shares, $943,050 reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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