Ticker · CUSIP 781154109
Holders (tracked)
23
Combined shares
14,243,802
Combined value
$1.05B
Last close
$51.94
Quarter
2025Q4
Tracked holders · last 8 quarters
+4 vs previous quarter over the last 7.
Price is -29.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
29 events
- +93,100 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−107,984 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−2,103,346 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−186,553 shares · 2025Q413F
- +4,752 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+657,267 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+335,265 shares · 2025Q413F
- Steve Cohen (Point72) exited2026-02-17−314,352 shares · 2025Q413F
- T. Rowe Price trimmed2026-02-17−642,531 shares · 2025Q413F
- Wellington Management added2026-02-17+215,127 shares · 2025Q413F
- Ray Dalio (Bridgewater Associates) added2026-02-13+13,983 shares · 2025Q413F
- +21,971 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−84,311 shares · 2025Q413F
- Cathie Wood (ARK Invest) added2026-02-11+135,164 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+4,522,846 shares · 2025Q413F
- −230,719 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−3,230,849 shares · 2025Q313F
- AQR Capital Management opened position2025-11-14+1,189,403 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−21,908 shares · 2025Q313F
- Steve Cohen (Point72) added2025-11-14+284,444 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−1,075,624 shares · 2025Q313F
- T. Rowe Price added2025-11-14+590,328 shares · 2025Q313F
- Wellington Management opened position2025-11-14+158,406 shares · 2025Q313F
- George Soros (Soros Fund Mgmt) exited2025-11-14−6,672 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−2,445,943 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−410,300 shares · 2025Q313F
- +37,940 shares · 2025Q313F
- Norges Bank (Norway SWF) added2025-11-12+798,190 shares · 2024Q313F
- Cathie Wood (ARK Invest) added2025-11-12+55,500 shares · 2025Q313F
Insider activity
Last 30 days
Net (open-market)
$0
Buys
0 · $0
Sells
0 · $0
Unique insiders
2
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-14 | Nithrakashyap Arvind Chief Technology Officer · Insider | A | 92,834 | — | $0 |
| 04-14 | Choudary Kiran Kumar Chief Financial Officer · Insider | A | 464,167 | — | $0 |
Follow-the-investor returns
If you'd copied each holder of RBRK…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2024Q3 | $0.07 | +69416.3% | $28.9M |
| Cathie Wood (ARK Invest) | 2024Q2 | $51.06 | +1.7% | $23.6M |
| Norges Bank (Norway SWF) | 2024Q2 | $52.50 | -1.1% | $234.9M |
| George Soros (Soros Fund Mgmt) | 2024Q2 | $62.57 | -17.0% | $1.1M |
| Renaissance Technologies | 2024Q4 | $64.11 | -19.0% | $37.6M |
| Ron Baron (Baron Capital / BAMCO) | 2025Q4 | $76.48 | -32.1% | $247K |
| Izzy Englander (Millennium Mgmt) | 2024Q2 | $76.55 | -32.1% | $2.0M |
| Izzy Englander (Millennium Mgmt) | 2024Q2 | $76.55 | -32.1% | $2.0M |
| Izzy Englander (Millennium Mgmt) | 2024Q2 | $76.55 | -32.1% | $2.0M |
| Two Sigma Investments | 2024Q2 | $76.75 | -32.3% | $37.2M |
| Steve Cohen (Point72) | 2024Q3 | $77.83 | -33.3% | $2.0M |
| Steve Cohen (Point72) | 2024Q3 | $77.83 | -33.3% | $2.0M |
| Ken Griffin (Citadel Advisors) | 2024Q2 | $78.50 | -33.8% | $11.6M |
| Ken Griffin (Citadel Advisors) | 2024Q2 | $78.50 | -33.8% | $11.6M |
| Ken Griffin (Citadel Advisors) | 2024Q2 | $78.50 | -33.8% | $11.6M |
| Wellington Management | 2025Q3 | $78.93 | -34.2% | $19.4M |
| D.E. Shaw & Co. | 2024Q4 | $80.01 | -35.1% | $18.8M |
| D.E. Shaw & Co. | 2024Q4 | $80.01 | -35.1% | $18.8M |
| D.E. Shaw & Co. | 2024Q4 | $80.01 | -35.1% | $18.8M |
| Paul Tudor Jones (Tudor Investment) | 2024Q4 | $80.05 | -35.1% | $1.9M |
| Paul Tudor Jones (Tudor Investment) | 2024Q4 | $80.05 | -35.1% | $1.9M |
| Ray Dalio (Bridgewater Associates) | 2025Q3 | $80.70 | -35.6% | $2.7M |
| AQR Capital Management | 2025Q3 | $82.25 | -36.9% | $56.2M |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions4
- Norges Bank (Norway SWF)+4,522,846$345.9M
- Paul Tudor Jones (Tudor Investment)+93,100$7.1M
- George Soros (Soros Fund Mgmt)+21,971$1.7M
- Ron Baron (Baron Capital / BAMCO)+4,752$363K
Added to5
- Two Sigma Investments+657,267$50.3M
- Izzy Englander (Millennium Mgmt)+335,265$25.6M
- Wellington Management+215,127$16.5M
- Cathie Wood (ARK Invest)+135,164$10.3M
- Ray Dalio (Bridgewater Associates)+13,983$1.1M
Trimmed5
- Ken Griffin (Citadel Advisors)−2,103,346$160.9M
- D.E. Shaw & Co.−186,553$14.3M
- AQR Capital Management−107,984$8.3M
- Renaissance Technologies−84,311$6.4M
- T. Rowe Price−642,531$49K
Exited1
- Steve Cohen (Point72)−314,352$25.9M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2024Q2 | 13 | $225.0M |
| 2024Q3 | 12 | $284.3M |
| 2024Q4 | 18 | $813.5M |
| 2025Q1 | 17 | $533.8M |
| 2025Q2 | 17 | $1.18B |
| 2025Q3 | 19 | $777.0M |
| 2025Q4 | 23 | $1.05B |
Who owns RBRK
23 super-investors · 2025Q4
Tracked stake
14.24M
shares
Combined value
$1.05B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New5Added7Trim9Sold2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Norges Bank Norway SWF | 4.52M | $346M |
| 2 | Ken Griffin Citadel Advisors | 1.92M | $147M |
| 3 | Izzy Englander Millennium Mgmt | 1.22M | $93M |
| 4 | AQR Capital Management | 1.08M | $83M |
| 5 | D.E. Shaw & Co. | 905.5K | $69M |
| 6 | Renaissance Technologies | 723.4K | $55M |
| 7 | Two Sigma Investments | 716.3K | $55M |
| 8 | Ken Griffin Citadel Advisors | 575.9K | $44M |
| 9 | Cathie Wood ARK Invest | 454.3K | $35M |
| 10 | Wellington Management | 373.5K | $29M |
| 11 | D.E. Shaw & Co. | 362.8K | $28M |
| 12 | D.E. Shaw & Co. | 256.6K | $20M |
| 13 | Ken Griffin Citadel Advisors | 222.7K | $17M |
| 14 | Izzy Englander Millennium Mgmt | 86.8K | $7M |
| 15 | Paul Tudor Jones Tudor Investment | 56.7K | $4M |
| 16 | Ray Dalio Bridgewater Associates | 51.9K | $4M |
| 17 | Steve Cohen Point72 | 39.2K | $3M |
| 18 | Izzy Englander Millennium Mgmt | 38.1K | $3M |
| 19 | Paul Tudor Jones Tudor Investment | 36.4K | $3M |
| 20 | Steve Cohen Point72 | 23.3K | $2M |
| 21 | George Soros Soros Fund Mgmt | 22.0K | $2M |
| 22 | Ron Baron Baron Capital / BAMCO | 4.8K | $363K |
| 23 | T. Rowe Price | 556.4K | $43K |
Recent moves
20 transactions
- +93,100 · 2025Q4
- +657,267 · 2025Q4
- +4,752 · 2025Q4
- +335,265 · 2025Q4
- −2,103,346 · 2025Q4
- −107,984 · 2025Q4
- −314,352 · 2025Q4
- TRIMD.E. Shaw & Co.−186,553 · 2025Q4
- TRIMT. Rowe Price−642,531 · 2025Q4
- +215,127 · 2025Q4
- +21,971 · 2025Q4
- +13,983 · 2025Q4
- −84,311 · 2025Q4
- +135,164 · 2025Q4
- +4,522,846 · 2025Q4
- −230,719 · 2025Q3
- +284,444 · 2025Q3
- −21,908 · 2025Q3
- −1,075,624 · 2025Q3
- TRIMD.E. Shaw & Co.−3,230,849 · 2025Q3
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