Ticker · CUSIP 64131A105
Holders (tracked)
7
Combined shares
932,523
Combined value
$1.24M
Last close
$1.40
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is +5.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
9 events
- Ken Griffin (Citadel Advisors) added2026-02-17+49,100 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−136,021 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−372,902 shares · 2025Q4Position
- D.E. Shaw & Co. exited2026-02-17−31,628 shares · 2025Q4Position
- Renaissance Technologies opened position2026-02-12+474,900 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−494,400 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−32,998 shares · 2025Q3Position
- D.E. Shaw & Co. opened position2025-11-14+31,628 shares · 2025Q3Position
- Mario Gabelli (GAMCO) added2025-11-12+2,000 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of STIM…
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 | 2019Q3 | $1.33 | +4.9% | $665K |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $2.46 | -43.2% | $111K |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $2.46 | -43.2% | $111K |
| Izzy Englander (Millennium Mgmt) | 2018Q2 | $3.59 | -61.0% | $15K |
| Two Sigma Investments | 2019Q1 | $3.67 | -61.8% | $278K |
| Mario Gabelli (GAMCO) | 2021Q1 | $5.03 | -72.2% | $111K |
| T. Rowe Price | 2018Q2 | $5.92 | -76.4% | $52K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Renaissance Technologies+474,900$655K
Added to1
- Ken Griffin (Citadel Advisors)+49,100$68K
Trimmed2
- Izzy Englander (Millennium Mgmt)−372,902$515K
- Two Sigma Investments−136,021$188K
Exited1
- D.E. Shaw & Co.−31,628$86K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $9.3M |
| 2022Q2 | 8 | $5.1M |
| 2022Q3 | 8 | $5K |
| 2022Q4 | 10 | $7.0M |
| 2023Q1 | 11 | $3.8M |
| 2023Q2 | 10 | $3.5M |
| 2023Q3 | 9 | $2.0M |
| 2023Q4 | 8 | $3.8M |
| 2024Q1 | 9 | $6.5M |
| 2024Q2 | 8 | $3.6M |
| 2024Q3 | 4 | $526K |
| 2024Q4 | 5 | $420K |
| 2025Q1 | 8 | $5.1M |
| 2025Q2 | 6 | $4.7M |
| 2025Q3 | 7 | $2.5M |
| 2025Q4 | 7 | $1.2M |
Who owns STIM
7 super-investors · 2025Q4
Tracked stake
932.5K
shares
Combined value
$1M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added2Trim2Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 474.9K | $655K |
| 2 | Two Sigma Investments | 198.7K | $274K |
| 3 | Ken Griffin Citadel Advisors | 79.5K | $110K |
| 4 | Mario Gabelli GAMCO | 79.2K | $109K |
| 5 | Ken Griffin Citadel Advisors | 52.5K | $72K |
| 6 | Izzy Englander Millennium Mgmt | 10.8K | $15K |
| 7 | T. Rowe Price | 36.9K | $51 |
Recent moves
20 transactions
- SOLDD.E. Shaw & Co.−31,628 · 2025Q4
- −136,021 · 2025Q4
- +49,100 · 2025Q4
- −372,902 · 2025Q4
- +474,900 · 2025Q4
- +31,628 · 2025Q3
- −32,998 · 2025Q3
- −494,400 · 2025Q3
- +2,000 · 2025Q3
- +17,761 · 2025Q2
- −107,503 · 2025Q2
- +220,394 · 2025Q2
- −53,700 · 2025Q2
- +657,725 · 2025Q1
- +475,267 · 2025Q1
- −104,900 · 2025Q1
- −700 · 2025Q1
- −423,200 · 2024Q4
- −2,100 · 2024Q4
- −59,058 · 2024Q3
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