Security record · archived quarter
AMBR
name pending profile ingest
10Tracked holders
0Δ holders
229.15KShares held
$396,428Reported value
+0New positions
−0Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -28.8% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 4 | -5 | 50.51K | $75,258 | — | −5 |
| Q1 2026 | 9 | -1 | 73.22K | $172,806 | +1 | −2 |
| Q4 2025 | 10 | 0 | 229.15K | $396,428 | — | — |
| Q3 2025 | 6 | +3 | 268.31K | $898,828 | +3 | — |
| Q2 2025 | 2 | 0 | 21.09K | $232,678 | +1 | −1 |
| Q1 2025 | 1 | -1 | 16.43K | $196,867 | +1 | −2 |
| Q4 2024 | 2 | +1 | 34.67K | $324,521 | +1 | — |
| Q3 2024 | 1 | 0 | 16.03K | $52,909 | — | — |
| Q2 2024 | 1 | — | 29.73K | $37,757 | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Millennium Management ✦ | 61.10K | +109.5% | $105,700 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | Citadel Advisors ✦ | 50.99K | -19.9% | $88,221 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | Susquehanna International Group, Llp | 27.66K | — | $47,845 | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Morgan Stanley ✦ | 26.08K | -0.5% | $45,118 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 5 | Marshall Wace ✦ | 22.86K | -78.9% | $39,540 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 6 | Simplex Trading, Llc | 19.41K | — | $33,582 | 0.0% | n/c | 1 | SEC ↗ |
| 7 | Two Sigma Investments ✦ | 11.50K | -8.8% | $19,898 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 8 | UBS Group AG | 5.40K | — | $9,339 | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.13K | -89.0% | $5,408 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | Rhumbline Advisers | 1.03K | — | $1,777 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 14 holders, 228.70K shares, $539,730 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: Q4 2025 ·
Methodology ·
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