Ticker · CUSIP 762544104
Holders (tracked)
7
Combined shares
2,528,855
Combined value
$7.08M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
SEC event timeline
15 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−1,651 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+390,949 shares · 2025Q413F
- +54,306 shares · 2025Q413F
- T. Rowe Price added2026-02-17+9,103 shares · 2025Q413F
- AQR Capital Management added2026-02-17+322,364 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−14,016 shares · 2025Q413F
- Renaissance Technologies exited2026-02-12−38,800 shares · 2025Q413F
- −171,386 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) exited2025-11-14−830,148 shares · 2025Q313F
- T. Rowe Price added2025-11-14+580 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+172,205 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+10,189 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−55,993 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+11,300 shares · 2025Q313F
- First Eagle Investment Management added2025-11-12+8,000 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 positions1
- Izzy Englander (Millennium Mgmt)+54,306$156K
Added to3
- D.E. Shaw & Co.+390,949$1.1M
- AQR Capital Management+322,364$928K
- T. Rowe Price+9,103$26
Trimmed3
- First Eagle Investment Management−171,386$494K
- Two Sigma Investments−14,016$40K
- Ken Griffin (Citadel Advisors)−1,651$5K
Exited1
- Renaissance Technologies−38,800$147K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 10 | $26.8M |
| 2022Q2 | 9 | $24.0M |
| 2022Q3 | 9 | $15K |
| 2022Q4 | 10 | $20.1M |
| 2023Q1 | 10 | $27.6M |
| 2023Q2 | 11 | $24.4M |
| 2023Q3 | 9 | $21.9M |
| 2023Q4 | 7 | $22.5M |
| 2024Q1 | 7 | $23.6M |
| 2024Q2 | 9 | $27.2M |
| 2024Q3 | 8 | $1.9M |
| 2024Q4 | 8 | $6.1M |
| 2025Q1 | 8 | $7.5M |
| 2025Q2 | 7 | $10.2M |
| 2025Q3 | 7 | $7.3M |
| 2025Q4 | 7 | $7.1M |
Who owns RBBN
7 super-investors · 2025Q4
Tracked stake
2.53M
shares
Combined value
$7M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added3Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | D.E. Shaw & Co. | 979.8K | $3M |
| 2 | First Eagle Investment Management | 862.5K | $2M |
| 3 | AQR Capital Management | 491.5K | $1M |
| 4 | Izzy Englander Millennium Mgmt | 54.3K | $156K |
| 5 | Ken Griffin Citadel Advisors | 53.9K | $155K |
| 6 | Two Sigma Investments | 17.0K | $49K |
| 7 | T. Rowe Price | 69.8K | $202 |
Recent moves
20 transactions
- +390,949 · 2025Q4
- −14,016 · 2025Q4
- +9,103 · 2025Q4
- −1,651 · 2025Q4
- +54,306 · 2025Q4
- +322,364 · 2025Q4
- −38,800 · 2025Q4
- −171,386 · 2025Q4
- −55,993 · 2025Q3
- +10,189 · 2025Q3
- +580 · 2025Q3
- −830,148 · 2025Q3
- +172,205 · 2025Q3
- +11,300 · 2025Q3
- +8,000 · 2025Q3
- +20,811 · 2025Q2
- +585,049 · 2025Q2
- TRIMT. Rowe Price−7,195 · 2025Q2
- +19,813 · 2025Q2
- −117,312 · 2025Q2
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