Ticker · CUSIP 392709101
Holders (tracked)
9
Combined shares
923,138
Combined value
$21.53M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
SEC event timeline
11 events
- AQR Capital Management trimmed2026-02-17−1,200 shares · 2025Q413F
- D.E. Shaw & Co. opened position2026-02-17+56,207 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−50,139 shares · 2025Q413F
- T. Rowe Price added2026-02-17+2,390 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+32,246 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−55,100 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+85,408 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2025-11-14+63,650 shares · 2025Q313F
- T. Rowe Price trimmed2025-11-14−1,141 shares · 2025Q313F
- AQR Capital Management added2025-11-14+2,844 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−46,900 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Norges Bank (Norway SWF)+85,408$5.4M
- D.E. Shaw & Co.+56,207$3.5M
Added to2
- Ken Griffin (Citadel Advisors)+32,246$2.0M
- T. Rowe Price+2,390$150
Trimmed3
- Renaissance Technologies−55,100$3.5M
- Izzy Englander (Millennium Mgmt)−50,139$3.1M
- AQR Capital Management−1,200$75K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 10 | $3.11B |
| 2022Q2 | 8 | $3.05B |
| 2022Q3 | 10 | $3.4M |
| 2022Q4 | 10 | $520.9M |
| 2023Q1 | 10 | $744.0M |
| 2023Q2 | 13 | $1.23B |
| 2023Q3 | 16 | $728.3M |
| 2023Q4 | 12 | $833.6M |
| 2024Q1 | 10 | $275.2M |
| 2024Q2 | 11 | $262.1M |
| 2024Q3 | 10 | $13.4M |
| 2024Q4 | 9 | $17.1M |
| 2025Q1 | 7 | $9.7M |
| 2025Q2 | 7 | $15.2M |
| 2025Q3 | 7 | $20.0M |
| 2025Q4 | 9 | $21.5M |
Who owns GRBK
9 super-investors · 2025Q4
Tracked stake
923.1K
shares
Combined value
$22M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added4Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Norges Bank Norway SWF | 85.4K | $5M |
| 2 | Ken Griffin Citadel Advisors | 60.5K | $4M |
| 3 | D.E. Shaw & Co. | 56.2K | $4M |
| 4 | Renaissance Technologies | 45.1K | $3M |
| 5 | Ken Griffin Citadel Advisors | 41.6K | $3M |
| 6 | AQR Capital Management | 25.7K | $2M |
| 7 | Izzy Englander Millennium Mgmt | 20.1K | $1M |
| 8 | Ken Griffin Citadel Advisors | 8.4K | $526K |
| 9 | T. Rowe Price | 580.1K | $36K |
Recent moves
20 transactions
- −50,139 · 2025Q4
- +2,390 · 2025Q4
- +32,246 · 2025Q4
- +56,207 · 2025Q4
- −1,200 · 2025Q4
- −55,100 · 2025Q4
- +85,408 · 2025Q4
- +63,650 · 2025Q3
- +2,844 · 2025Q3
- TRIMT. Rowe Price−1,141 · 2025Q3
- −46,900 · 2025Q3
- +10,600 · 2025Q2
- +3,926 · 2025Q2
- −13,418 · 2025Q2
- +53,900 · 2025Q2
- −26,902 · 2025Q1
- −4,400 · 2025Q1
- +9,597 · 2025Q1
- −52,500 · 2025Q1
- +3,003 · 2025Q1
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