Ticker · CUSIP 82706C108
Holders (tracked)
13
Combined shares
1,717,539
Combined value
$159.22M
Last close
$139.71
Quarter
2025Q4
Price · 1Y$139.71+101.48 (+265.45%)H $143.01 · L $37.97 · Avg Vol 475K
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is +50.7% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
18 events
- Ken Griffin (Citadel Advisors) added2026-02-17+60,305 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+23,470 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+302,476 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−66,158 shares · 2025Q4Position
- Steve Cohen (Point72) exited2026-02-17−700,048 shares · 2025Q4Position
- Wellington Management added2026-02-17+1,043 shares · 2025Q4Position
- +2,500 shares · 2025Q4Position
- Mario Gabelli (GAMCO) trimmed2026-02-05−4,029 shares · 2025Q4Position
- First Eagle Investment Management added2026-02-04+3,032 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+88,146 shares · 2025Q3Position
- Steve Cohen (Point72) trimmed2025-11-14−364,354 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+57,015 shares · 2025Q3Position
- D.E. Shaw & Co. trimmed2025-11-14−23,927 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−154,044 shares · 2025Q3Position
- Renaissance Technologies exited2025-11-13−11,500 shares · 2025Q3Position
- Norges Bank (Norway SWF) added2025-11-12+146,456 shares · 2024Q3Position
- Mario Gabelli (GAMCO) trimmed2025-11-12−3,639 shares · 2025Q3Position
- First Eagle Investment Management added2025-11-12+4,287 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of SIMO…
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 |
|---|---|---|---|---|
| Jeremy Grantham (GMO) | 2016Q1 | $65.34 | +113.8% | $2.2M |
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $69.89 | +99.9% | $349K |
| Wellington Management | 2016Q1 | $71.58 | +95.2% | $97.4M |
| Mario Gabelli (GAMCO) | 2023Q3 | $72.60 | +92.4% | $2.6M |
| First Eagle Investment Management | 2025Q2 | $76.06 | +83.7% | $21.4M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $77.12 | +81.2% | $20.5M |
| D.E. Shaw & Co. | 2016Q1 | $77.52 | +80.2% | $14.3M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $92.17 | +51.6% | $18.6M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $92.17 | +51.6% | $18.6M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $92.17 | +51.6% | $18.6M |
| Two Sigma Investments | 2016Q3 | $92.68 | +50.8% | $657K |
| Two Sigma Investments | 2016Q3 | $92.68 | +50.8% | $657K |
| Two Sigma Investments | 2016Q3 | $92.68 | +50.8% | $657K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+2,500$232K
Added to5
- Two Sigma Investments+302,476$28.0M
- Ken Griffin (Citadel Advisors)+60,305$5.6M
- D.E. Shaw & Co.+23,470$2.2M
- First Eagle Investment Management+3,032$281K
- Wellington Management+1,043$97K
Trimmed2
- Izzy Englander (Millennium Mgmt)−66,158$6.1M
- Mario Gabelli (GAMCO)−4,029$373K
Exited1
- Steve Cohen (Point72)−700,048$66.4M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 12 | $194.9M |
| 2022Q2 | 9 | $211.5M |
| 2022Q3 | 12 | $177.6M |
| 2022Q4 | 11 | $175.3M |
| 2023Q1 | 9 | $159.2M |
| 2023Q2 | 14 | $235.5M |
| 2023Q3 | 14 | $111.2M |
| 2023Q4 | 10 | $128.9M |
| 2024Q1 | 10 | $212.9M |
| 2024Q2 | 13 | $221.9M |
| 2024Q3 | 11 | $157.1M |
| 2024Q4 | 10 | $79.0M |
| 2025Q1 | 10 | $70.8M |
| 2025Q2 | 13 | $189.8M |
| 2025Q3 | 11 | $197.5M |
| 2025Q4 | 13 | $159.2M |
Who owns SIMO
13 super-investors · 2025Q4
Tracked stake
1.72M
shares
Combined value
$159M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added9Trim2Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 697.0K | $65M |
| 2 | Two Sigma Investments | 379.8K | $35M |
| 3 | First Eagle Investment Management | 153.5K | $14M |
| 4 | Izzy Englander Millennium Mgmt | 147.0K | $14M |
| 5 | Ken Griffin Citadel Advisors | 133.1K | $12M |
| 6 | D.E. Shaw & Co. | 102.0K | $9M |
| 7 | Ken Griffin Citadel Advisors | 32.7K | $3M |
| 8 | Ken Griffin Citadel Advisors | 27.7K | $3M |
| 9 | Mario Gabelli GAMCO | 18.6K | $2M |
| 10 | Jeremy Grantham GMO | 16.1K | $1M |
| 11 | Two Sigma Investments | 4.7K | $436K |
| 12 | Two Sigma Investments | 2.8K | $260K |
| 13 | Paul Tudor Jones Tudor Investment | 2.5K | $232K |
Recent moves
20 transactions
- −700,048 · 2025Q4
- −66,158 · 2025Q4
- +60,305 · 2025Q4
- +302,476 · 2025Q4
- +23,470 · 2025Q4
- +2,500 · 2025Q4
- +1,043 · 2025Q4
- −4,029 · 2025Q4
- +3,032 · 2025Q4
- −364,354 · 2025Q3
- +88,146 · 2025Q3
- −154,044 · 2025Q3
- +57,015 · 2025Q3
- TRIMD.E. Shaw & Co.−23,927 · 2025Q3
- −11,500 · 2025Q3
- +4,287 · 2025Q3
- −3,639 · 2025Q3
- +146,456 · 2024Q3
- +963,941 · 2025Q2
- −70,678 · 2025Q2
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