Ticker · CUSIP 500688106
Holders (tracked)
11
Combined shares
69,124,036
Combined value
$62.72M
Last close
$2.48
Quarter
2025Q4
Price · 1Y$2.48+0.69 (+38.55%)H $3.10 · L $0.87 · Avg Vol 15.4M
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is +173.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
21 events
- D.E. Shaw & Co. added2026-02-17+4,044,309 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−1,069,269 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+2,130,152 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−1,351,482 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+621,106 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−108,630 shares · 2025Q4Position
- Wellington Management exited2026-02-17−47,443 shares · 2025Q4Position
- Jeremy Grantham (GMO) added2026-02-17+23,350 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+353,220 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+1,347,585 shares · 2025Q4Position
- First Eagle Investment Management exited2026-02-04−2,747,831 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+8,517,109 shares · 2025Q3Position
- Steve Cohen (Point72) exited2025-11-14−478,080 shares · 2025Q3Position
- Wellington Management opened position2025-11-14+47,443 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+367,079 shares · 2025Q3Position
- AQR Capital Management trimmed2025-11-14−70,607 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+1,464,678 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−27,686 shares · 2025Q3Position
- Jeremy Grantham (GMO) trimmed2025-11-13−2,039,300 shares · 2025Q3Position
- Renaissance Technologies opened position2025-11-13+300,253 shares · 2025Q3Position
- First Eagle Investment Management added2025-11-12+698,740 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of KOS…
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 |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2019Q1 | $0.95 | +161.8% | $13.8M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $0.95 | +161.8% | $13.8M |
| Ken Griffin (Citadel Advisors) | 2019Q1 | $0.95 | +161.8% | $13.8M |
| D.E. Shaw & Co. | 2018Q4 | $1.20 | +106.5% | $14.8M |
| Two Sigma Investments | 2018Q4 | $1.29 | +93.0% | $9.6M |
| Renaissance Technologies | 2019Q4 | $1.82 | +36.2% | $4.1M |
| Steve Cohen (Point72) | 2018Q4 | $2.07 | +20.1% | $1.5M |
| AQR Capital Management | 2019Q1 | $2.07 | +20.1% | $1.3M |
| Izzy Englander (Millennium Mgmt) | 2018Q4 | $2.21 | +12.2% | $36.8M |
| Jeremy Grantham (GMO) | 2020Q2 | $3.32 | -25.2% | $86.3M |
| T. Rowe Price | 2018Q4 | $6.81 | -63.6% | $695K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Steve Cohen (Point72)+621,106$564K
Added to5
- D.E. Shaw & Co.+4,044,309$3.7M
- Two Sigma Investments+2,130,152$1.9M
- Renaissance Technologies+1,347,585$1.2M
- AQR Capital Management+353,220$321K
- Jeremy Grantham (GMO)+23,350$21K
Trimmed3
- Izzy Englander (Millennium Mgmt)−1,351,482$1.2M
- Ken Griffin (Citadel Advisors)−1,069,269$970K
- T. Rowe Price−108,630$98
Exited2
- First Eagle Investment Management−2,747,831$4.6M
- Wellington Management−47,443$79K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 12 | $631.5M |
| 2022Q2 | 12 | $483.4M |
| 2022Q3 | 13 | $378.8M |
| 2022Q4 | 12 | $510.8M |
| 2023Q1 | 12 | $622.9M |
| 2023Q2 | 10 | $548.1M |
| 2023Q3 | 11 | $775.5M |
| 2023Q4 | 11 | $635.9M |
| 2024Q1 | 12 | $630.6M |
| 2024Q2 | 12 | $551.0M |
| 2024Q3 | 11 | $213.0M |
| 2024Q4 | 9 | $161.2M |
| 2025Q1 | 10 | $124.7M |
| 2025Q2 | 11 | $102.9M |
| 2025Q3 | 12 | $109.2M |
| 2025Q4 | 11 | $62.7M |
Who owns KOS
11 super-investors · 2025Q4
Tracked stake
69.12M
shares
Combined value
$63M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added5Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Jeremy Grantham GMO | 34.80M | $32M |
| 2 | Izzy Englander Millennium Mgmt | 14.83M | $13M |
| 3 | D.E. Shaw & Co. | 5.97M | $5M |
| 4 | Ken Griffin Citadel Advisors | 5.56M | $5M |
| 5 | Two Sigma Investments | 3.86M | $3M |
| 6 | Renaissance Technologies | 1.65M | $1M |
| 7 | Ken Griffin Citadel Advisors | 736.3K | $668K |
| 8 | Steve Cohen Point72 | 621.1K | $564K |
| 9 | AQR Capital Management | 536.3K | $487K |
| 10 | Ken Griffin Citadel Advisors | 292.4K | $265K |
| 11 | T. Rowe Price | 280.4K | $253K |
Recent moves
20 transactions
- +353,220 · 2025Q4
- +23,350 · 2025Q4
- −1,351,482 · 2025Q4
- TRIMT. Rowe Price−108,630 · 2025Q4
- +621,106 · 2025Q4
- −1,069,269 · 2025Q4
- +2,130,152 · 2025Q4
- −47,443 · 2025Q4
- +4,044,309 · 2025Q4
- +1,347,585 · 2025Q4
- −2,747,831 · 2025Q4
- −478,080 · 2025Q3
- +1,464,678 · 2025Q3
- +8,517,109 · 2025Q3
- TRIMT. Rowe Price−27,686 · 2025Q3
- +47,443 · 2025Q3
- −70,607 · 2025Q3
- +367,079 · 2025Q3
- −2,039,300 · 2025Q3
- +300,253 · 2025Q3
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