Ticker · CUSIP 04216R102
Holders (tracked)
3
Combined shares
105,370
Combined value
$661.7K
Last close
$11.50
Quarter
2025Q4
Price · 1Y$11.50+10.27 (+834.96%)H $12.88 · L $1.23 · Avg Vol 149K
Position opened
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +83.1% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
4 events
- +10,786 shares · 2025Q4Position
- +26,088 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+27,200 shares · 2025Q4Position
- Renaissance Technologies added2025-11-13+2,400 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ARMP…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Renaissance Technologies | 2019Q2 | $4.80 | +139.4% | $788K |
| Izzy Englander (Millennium Mgmt) | 2021Q1 | $5.11 | +125.1% | $300K |
| Ken Griffin (Citadel Advisors) | 2021Q2 | $5.83 | +97.1% | $124K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Izzy Englander (Millennium Mgmt)+26,088$164K
- Ken Griffin (Citadel Advisors)+10,786$68K
Added to1
- Renaissance Technologies+27,200$171K
Trimmed0
—
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 2 | $520K |
| 2022Q2 | 2 | $395K |
| 2022Q3 | 2 | $396K |
| 2022Q4 | 4 | $156K |
| 2023Q1 | 3 | $167K |
| 2023Q2 | 2 | $99K |
| 2023Q3 | 2 | $241K |
| 2023Q4 | 2 | $248K |
| 2024Q1 | 4 | $391K |
| 2024Q2 | 5 | $260K |
| 2024Q3 | 4 | $146K |
| 2024Q4 | 1 | $75K |
| 2025Q1 | 4 | $88K |
| 2025Q2 | 1 | $74K |
| 2025Q3 | 1 | $123K |
| 2025Q4 | 3 | $662K |
Who owns ARMP
3 super-investors · 2025Q4
Tracked stake
105.4K
shares
Combined value
$662K
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 68.5K | $430K |
| 2 | Izzy Englander Millennium Mgmt | 26.1K | $164K |
| 3 | Ken Griffin Citadel Advisors | 10.8K | $68K |
Recent moves
20 transactions
- +26,088 · 2025Q4
- +10,786 · 2025Q4
- +27,200 · 2025Q4
- +2,400 · 2025Q3
- +300 · 2025Q2
- −1,695 · 2025Q1
- −6,205 · 2024Q4
- −1,700 · 2024Q3
- TRIMBlackRock−947 · 2024Q2
- −3,200 · 2024Q2
- −2,200 · 2024Q1
- ADDBlackRock+1,108 · 2024Q1
- TRIMBlackRock−266 · 2023Q4
- −3,900 · 2023Q4
- −4,900 · 2023Q3
- TRIMBlackRock−1,390 · 2023Q3
- −11,130 · 2023Q2
- −800 · 2023Q2
- TRIMBlackRock−952 · 2023Q2
- −4,455 · 2023Q1
Embed this chart
Paste this iframe anywhere to embed the live ARMP chart.
<iframe src="https://openstocks.me/embed/stocks/ARMP" width="100%" height="480" frameborder="0" loading="lazy" title="ARMP chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>Explore related topics
- ARMP insider tradingEvery Form 4 filing by ARMP officers, directors, and 10%+ holders.
- ARMP analyst target pricesWall Street consensus target, analyst-by-analyst breakdown, and revision history.
- Most popular hedge-fund stocksSee where this ticker ranks against the broader smart-money consensus.
- All insider tradingCross-ticker view of where corporate insiders are buying on the open market.
- Congress stock tradesReal-time PTR disclosures filed under the STOCK Act.
- Smart-money signalsComposite signals where institutional, insider and Congress flows converge.