Rubrik (RBRK)
Rubrik on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as services-prepackaged software.
13.2M
Short interest
settlement 2026-10-15
4.6
Days to cover
+0.4 days vs prior
52.0%
Short share of volume
2026-10-28
300
Fails to deliver
settlement 2026-09-28
Thu 3 Dec
Next earnings
estimated date
-$17.3M
Insider flow, 90 days
0 buys, 73 sells
As of 2026-10-28.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in RBRK is 13,243,582 shares, down 478,894 shares over the last month. Over the last 48 readings it ranged from 3,545,973 shares (29 November 2024) to 15,998,613 shares (29 May 2026). At the reported average volume of 2.9M shares a day that is 4.6 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 13,243,582 | +1.1% | 2,880,130 | 4.60 |
| 2026-09-30 | 13,099,712 | -4.5% | 3,107,937 | 4.21 |
| 2026-09-15 | 13,722,476 | -9.9% | 3,248,811 | 4.22 |
| 2026-08-31 | 15,226,391 | +1.7% | 4,206,766 | 3.62 |
| 2026-08-14 | 14,973,029 | +17.3% | 3,559,618 | 4.21 |
| 2026-07-31 | 12,766,557 | -6.6% | 2,039,799 | 6.26 |
| 2026-07-15 | 13,671,392 | +4.9% | 3,363,203 | 4.06 |
| 2026-06-30 | 13,029,558 | -9.3% | 4,039,509 | 3.23 |
| 2026-06-15 | 14,368,276 | -10.2% | 5,496,014 | 2.61 |
| 2026-05-29 | 15,998,613 | +0.8% | 3,539,710 | 4.52 |
| 2026-05-15 | 15,863,024 | +23.6% | 3,098,510 | 5.12 |
| 2026-04-30 | 12,839,603 | -2.3% | 2,914,675 | 4.41 |
| 2026-04-15 | 13,139,233 | -4.3% | 3,799,863 | 3.46 |
| 2026-03-31 | 13,730,073 | -4.2% | 4,716,979 | 2.91 |
| 2026-03-13 | 14,336,377 | +12.9% | 4,429,568 | 3.24 |
| 2026-02-27 | 12,695,788 | -10.4% | 2,975,880 | 4.27 |
| 2026-02-13 | 14,167,128 | +9.0% | 4,857,653 | 2.92 |
| 2026-01-30 | 12,995,477 | +9.3% | 4,618,990 | 2.81 |
| 2026-01-15 | 11,887,564 | +12.5% | 2,952,266 | 4.03 |
| 2025-12-31 | 10,570,263 | -3.0% | 3,459,104 | 3.06 |
| 2025-12-15 | 10,900,159 | -4.8% | 5,411,204 | 2.01 |
| 2025-11-28 | 11,448,039 | -8.9% | 2,052,680 | 5.58 |
| 2025-11-14 | 12,566,710 | +5.5% | 2,003,118 | 6.27 |
| 2025-10-31 | 11,908,186 | +2.9% | 2,944,433 | 4.04 |
| 2025-10-15 | 11,569,941 | -3.7% | 2,787,076 | 4.15 |
| 2025-09-30 | 12,010,856 | +11.0% | 4,786,819 | 2.51 |
| 2025-09-15 | 10,821,260 | +8.3% | 6,518,868 | 1.66 |
| 2025-08-29 | 9,988,072 | +12.3% | 2,358,533 | 4.23 |
| 2025-08-15 | 8,896,404 | -4.2% | 2,729,571 | 3.26 |
| 2025-07-31 | 9,282,229 | -9.5% | 3,284,266 | 2.83 |
| 2025-07-15 | 10,254,018 | -7.4% | 3,650,295 | 2.81 |
| 2025-06-30 | 11,072,560 | +19.2% | 6,306,190 | 1.76 |
| 2025-06-13 | 9,291,620 | +40.7% | 5,107,376 | 1.82 |
| 2025-05-30 | 6,602,189 | +2.3% | 2,432,173 | 2.71 |
| 2025-05-15 | 6,454,379 | -0.6% | 2,498,763 | 2.58 |
| 2025-04-30 | 6,494,418 | -11.5% | 2,352,158 | 2.76 |
| 2025-04-15 | 7,338,708 | -6.1% | 2,904,872 | 2.53 |
| 2025-03-31 | 7,813,187 | -6.4% | 3,233,271 | 2.42 |
| 2025-03-14 | 8,345,654 | +1.9% | 2,474,452 | 3.37 |
| 2025-02-28 | 8,187,266 | -8.5% | 1,911,272 | 4.28 |
| 2025-02-14 | 8,949,217 | +1.5% | 1,831,209 | 4.89 |
| 2025-01-31 | 8,820,618 | -1.3% | 2,127,096 | 4.15 |
| 2025-01-15 | 8,937,227 | +1.3% | 2,429,434 | 3.68 |
| 2024-12-31 | 8,818,984 | +74.9% | 3,664,099 | 2.41 |
| 2024-12-13 | 5,041,342 | +42.2% | 4,643,666 | 1.09 |
| 2024-11-29 | 3,545,973 | -16.5% | 1,145,646 | 3.10 |
| 2024-11-15 | 4,247,016 | -2.7% | 1,140,447 | 3.72 |
| 2024-10-31 | 4,365,748 | -11.0% | 1,457,489 | 3.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 28 October 2026, the short share of RBRK volume is 52.0%, down 13.5 points over the last five sessions. Over the last 30 readings it ranged from 37.4% (1 October 2026) to 70.9% (17 September 2026). The latest reading is 4.8 points below the 30-session average of 56.7%, on 1.4M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-28 | 703K | 1.4M | 52.0% | 0 |
| 2026-10-27 | 707K | 1.2M | 59.9% | 0 |
| 2026-10-26 | 1.6M | 2.4M | 64.6% | 1,452 |
| 2026-10-23 | 1.2M | 1.8M | 66.3% | 12,585 |
| 2026-10-22 | 516K | 850K | 60.7% | 222 |
| 2026-10-21 | 760K | 1.2M | 65.4% | 50 |
| 2026-10-20 | 405K | 753K | 53.8% | 15 |
| 2026-10-19 | 631K | 1.2M | 53.5% | 14,128 |
| 2026-10-16 | 1.1M | 1.9M | 57.2% | 1,427 |
| 2026-10-15 | 990K | 1.6M | 60.6% | 8,816 |
| 2026-10-14 | 659K | 1.2M | 54.4% | 3,239 |
| 2026-10-13 | 588K | 853K | 69.0% | 3,422 |
| 2026-10-12 | 542K | 906K | 59.8% | 16,493 |
| 2026-10-09 | 517K | 1.2M | 42.8% | 3,253 |
| 2026-10-08 | 726K | 1.2M | 60.6% | 4,340 |
| 2026-10-07 | 509K | 895K | 56.9% | 22,200 |
| 2026-10-06 | 567K | 1.0M | 54.5% | 2,542 |
| 2026-10-05 | 660K | 1.2M | 55.5% | 4,361 |
| 2026-10-02 | 648K | 1.2M | 53.3% | 1,003 |
| 2026-10-01 | 381K | 1.0M | 37.4% | 5,983 |
| 2026-09-30 | 611K | 965K | 63.3% | 115 |
| 2026-09-29 | 525K | 815K | 64.4% | 104 |
| 2026-09-28 | 545K | 1.1M | 50.8% | 201 |
| 2026-09-25 | 509K | 1.3M | 38.9% | 1,142 |
| 2026-09-24 | 387K | 729K | 53.0% | 8,155 |
| 2026-09-23 | 645K | 1.1M | 57.1% | 44,998 |
| 2026-09-22 | 562K | 1.0M | 54.3% | 8,642 |
| 2026-09-21 | 809K | 1.6M | 49.4% | 5,096 |
| 2026-09-18 | 839K | 1.3M | 62.2% | 481 |
| 2026-09-17 | 1.2M | 1.7M | 70.9% | 30,278 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 28 September 2026, the fails-to-deliver balance in RBRK is 300 shares, down 2,864 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (26 June 2026) to 156,312 shares (8 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-28 | 300 | $109.55 | $33K |
| 2026-09-21 | 3,164 | $106.71 | $338K |
| 2026-09-08 | 2,199 | $93.67 | $206K |
| 2026-09-02 | 489 | $88.40 | $43K |
| 2026-08-31 | 543 | $93.05 | $51K |
| 2026-08-25 | 1 | $98.04 | $98 |
| 2026-08-24 | 71,800 | $100.09 | $7.2M |
| 2026-08-14 | 117 | $105.09 | $12K |
| 2026-08-07 | 2,325 | $84.60 | $197K |
| 2026-08-04 | 4 | $74.74 | $299 |
| 2026-07-23 | 50 | $73.69 | $4K |
| 2026-07-20 | 1,676 | $78.97 | $132K |
| 2026-07-16 | 12,860 | $80.38 | $1.0M |
| 2026-07-09 | 800 | $84.40 | $68K |
| 2026-07-08 | 1,066 | $87.04 | $93K |
| 2026-07-06 | 51 | $83.64 | $4K |
| 2026-07-02 | 2,228 | $82.01 | $183K |
| 2026-06-30 | 58,894 | $76.52 | $4.5M |
| 2026-06-26 | 1 | $71.02 | $71 |
| 2026-06-24 | 8,751 | $74.24 | $650K |
| 2026-06-16 | 72,856 | $69.79 | $5.1M |
| 2026-06-15 | 6,390 | $68.19 | $436K |
| 2026-06-08 | 156,312 | $73.41 | $11.5M |
| 2026-06-05 | 14,419 | $77.00 | $1.1M |
| 2026-06-04 | 70,879 | $79.46 | $5.6M |
| 2026-06-03 | 2,226 | $82.33 | $183K |
| 2026-06-01 | 412 | $78.63 | $32K |
| 2026-05-26 | 53,289 | $66.59 | $3.5M |
| 2026-05-19 | 7,301 | $64.98 | $474K |
| 2026-05-18 | 12,431 | $63.77 | $793K |
Insider trades
SEC Form 4, newest first. JSONInsiders at RBRK reported 73 open-market sells worth $17.3M in the last 90 days and no open-market buys. Latest filing: Nithrakashyap Arvind (Chief Technology Officer) on 2026-10-07.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-07 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 13 | $125.57 | $2K | 273K |
| 2026-10-07 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $124.79 | $381K | 273K |
| 2026-10-07 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8K | $124.05 | $1.0M | 276K |
| 2026-10-07 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1K | $123.32 | $182K | 284K |
| 2026-10-07 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 285K |
| 2026-10-06 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 68 | $127.70 | $9K | 273K |
| 2026-10-06 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1K | $126.87 | $136K | 273K |
| 2026-10-06 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 11K | $126.14 | $1.4M | 274K |
| 2026-10-06 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 582 | $125.35 | $73K | 285K |
| 2026-10-06 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 285K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $123.80 | $361K | 273K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 6K | $122.99 | $689K | 275K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $121.95 | $342K | 281K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 901 | $121.20 | $109K | 284K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 110 | $120.26 | $13K | 285K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 495 | $118.92 | $59K | 285K |
| 2026-10-05 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 3K | $0.00 | $0 | 285K |
| 2026-10-05 | Wassenaar Yvonne | Director | Sell | 721 | $119.00 | $86K | 3K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 2K | $116.46 | $279K | 8K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 8K | $115.57 | $891K | 11K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 896 | $114.71 | $103K | 18K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Conversion | 11K | $0.00 | $0 | 19K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 500 | $116.47 | $58K | 5K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 2K | $115.62 | $197K | 6K |
| 2026-10-01 | THOMPSON JOHN WENDELL | Director | Sell | 300 | $114.68 | $34K | 7K |
| 2026-09-25 | Sinha Bipul | Chairman of the Board and CEO | Gift | 55K | $0.00 | $0 | 57K |
| 2026-09-24 | Sinha Bipul | Chairman of the Board and CEO | Conversion | 55K | price not stated in the filing | not stated | 112K |
| 2026-09-24 | Sinha Bipul | Chairman of the Board and CEO | Conversion | 500K | price not stated in the filing | not stated | 500K |
| 2026-09-17 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 200 | $103.86 | $21K | 964K |
| 2026-09-17 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 3K | $108.05 | $278K | 958K |
| 2026-09-17 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 3K | $107.42 | $293K | 961K |
| 2026-09-17 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 300 | $105.98 | $32K | 963K |
| 2026-09-17 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 200 | $102.05 | $20K | 964K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Tax withholding | 14K | $100.20 | $1.4M | 964K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 400 | $103.48 | $41K | 978K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 700 | $102.72 | $72K | 978K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1K | $101.47 | $123K | 979K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 586 | $100.20 | $59K | 980K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1K | $99.08 | $109K | 981K |
| 2026-09-15 | Choudary Kiran Kumar | Chief Financial Officer | Conversion | 4K | $0.00 | $0 | 982K |
| 2026-09-15 | Nithrakashyap Arvind | Chief Technology Officer | Tax withholding | 10K | $100.20 | $1.0M | 283K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2K | $91.67 | $213K | 293K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5K | $90.88 | $425K | 296K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5K | $89.73 | $435K | 300K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 611 | $89.12 | $54K | 305K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 369 | $87.55 | $32K | 306K |
| 2026-09-10 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 306K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 30 | $92.87 | $3K | 293K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1K | $92.08 | $93K | 293K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $91.16 | $295K | 294K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5K | $90.41 | $479K | 298K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $89.33 | $290K | 303K |
| 2026-09-09 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 306K |
| 2026-09-08 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 2K | $91.95 | $204K | 293K |
| 2026-09-08 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8K | $91.47 | $717K | 296K |
| 2026-09-08 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $90.43 | $250K | 303K |
| 2026-09-08 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 306K |
| 2026-09-03 | Wassenaar Yvonne | Director | Sell | 721 | $89.52 | $65K | 4K |
| 2026-09-03 | Wassenaar Yvonne | Director | Conversion | 513 | $0.00 | $0 | 4K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 200 | $92.37 | $18K | 8K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 600 | $90.24 | $54K | 9K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 900 | $91.08 | $82K | 9K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 5K | $89.02 | $418K | 10K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 5K | $88.34 | $406K | 15K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Conversion | 11K | $0.00 | $0 | 19K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 200 | $91.66 | $18K | 8K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 100 | $90.30 | $9K | 8K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 600 | $89.18 | $54K | 8K |
| 2026-09-01 | THOMPSON JOHN WENDELL | Director | Sell | 2K | $88.58 | $142K | 8K |
| 2026-08-26 | Russak-Aminoach Rakefet | Director | Grant | 10K | $0.00 | $0 | 10K |
| 2026-08-24 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 300 | $99.93 | $30K | 978K |
| 2026-08-24 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 5K | $98.65 | $523K | 978K |
| 2026-08-24 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 4K | $97.81 | $430K | 984K |
| 2026-08-24 | Choudary Kiran Kumar | Chief Financial Officer | Conversion | 4K | $0.00 | $0 | 988K |
| 2026-08-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 521 | $84.61 | $44K | 293K |
| 2026-08-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8K | $84.10 | $688K | 294K |
| 2026-08-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $83.17 | $231K | 302K |
| 2026-08-05 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1K | $82.08 | $110K | 305K |
| 2026-08-05 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 306K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5K | $80.94 | $369K | 293K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 4K | $79.81 | $301K | 298K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 3K | $79.11 | $236K | 302K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 1K | $77.99 | $102K | 305K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 212 | $76.77 | $16K | 306K |
| 2026-08-04 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 13K | $0.00 | $0 | 306K |
| 2026-08-03 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 5K | $74.52 | $386K | 293K |
| 2026-08-03 | Nithrakashyap Arvind | Chief Technology Officer | Sell | 8K | $73.72 | $563K | 298K |
| 2026-08-03 | Nithrakashyap Arvind | Chief Technology Officer | Conversion | 3K | $0.00 | $0 | 306K |
| 2026-08-03 | Wassenaar Yvonne | Director | Sell | 721 | $75.00 | $54K | 4K |
| 2026-08-03 | THOMPSON JOHN WENDELL | Director | Sell | 5K | $74.51 | $392K | 8K |
| 2026-08-03 | THOMPSON JOHN WENDELL | Director | Sell | 6K | $73.73 | $423K | 14K |
| 2026-08-03 | THOMPSON JOHN WENDELL | Director | Conversion | 11K | $0.00 | $0 | 19K |
| 2026-08-03 | THOMPSON JOHN WENDELL | Director | Sell | 1K | $74.59 | $75K | 10K |
| 2026-08-03 | THOMPSON JOHN WENDELL | Director | Sell | 2K | $73.79 | $111K | 11K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1K | $88.64 | $98K | 984K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1K | $87.35 | $87K | 985K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 2K | $86.58 | $182K | 986K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 400 | $85.15 | $34K | 988K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 2K | $83.37 | $150K | 989K |
| 2026-07-15 | Choudary Kiran Kumar | Chief Financial Officer | Sell | 1K | $82.27 | $99K | 990K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON27 Form 144 notices on file for RBRK worth $53.6M at the prices reported; 3 in the last 90 days worth $3.1M. Latest: YVONNE WASSENAAR filed on 2026-09-03 to sell 2,163 shares ($189K) from 2026-09-03.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-03 | YVONNE WASSENAARDirector | 2K | $189K | 0.001% | 2026-09-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-03 | JOHN AND SANDRA THOMPSON TRUSTDirector | 8K | $543K | 0.005% | 2026-08-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-03 | JOHN THOMPSONDirector | 33K | $2.4M | 0.021% | 2026-08-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-15 | KIRAN CHOUDARYOfficer | 48K | $4.2M | 0.030% | 2026-07-15 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-29 | YVONNE WASSENAARDirector | 6K | $399K | 0.004% | 2026-05-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-01 | JOHN AND SANDRA THOMPSON TRUSTDirector | 8K | $399K | 0.005% | 2026-05-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-01 | JOHN THOMPSONDirector | 33K | $1.8M | 0.021% | 2026-05-01 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-24 | Arvind NithrakashyapOfficer, Director | 29K | $1.4M | 0.018% | 2026-03-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-24 | Kiran Kumar ChoudaryOfficer | 123K | $6.0M | 0.078% | 2026-03-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-16 | KIRAN CHOUDARYOfficer | 60K | $4.1M | 0.040% | 2026-01-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-05 | JOHN AND SANDRA THOMPSON TRUSTDirector | 10K | $755K | 0.007% | 2026-01-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-01-05 | JOHN THOMPSONDirector | 44K | $3.3M | 0.029% | 2026-01-05 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-22 | KIRAN KUMAR CHOUDARYOfficer | 7K | $547K | 0.005% | 2025-12-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-16 | NITHRAKASHYAP ARVINDDirector, Officer | 34K | $2.7M | 0.022% | 2025-12-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-16 | MCCARTHY BRIAN K.Officer | 5K | $383K | 0.003% | 2025-12-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-16 | CHOUDARY KIRAN KUMAROfficer | 7K | $578K | 0.005% | 2025-12-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-12 | Lightspeed Venture Partners X, LPAffiliate | 102K | $8.9M | 0.067% | 2025-12-12 | Merrill Lynch, Pierce,Fenner & Smith Incorporated |
| 2025-12-12 | 001-42028Affiliate | 5K | $462K | 0.003% | 2025-12-12 | Merrill Lynch, Pierce,Fenner & Smith Incorporated |
| 2025-12-12 | Lightspeed General Partner Select II, LPAffiliate | 206 | $18K | 0.000% | 2025-12-12 | Merrill Lynch, Pierce,Fenner & Smith Incorporated |
| 2025-12-12 | Lightspeed General Partner IX, LPAffiliate | 10K | $882K | 0.007% | 2025-12-12 | Merrill Lynch, Pierce,Fenner & Smith Incorporated |
| 2025-12-08 | Eggers Investments LP - Fund 2affiliate | 40K | $3.5M | 0.026% | 2025-12-08 | Merrill Lynch |
| 2025-11-03 | JOHN AND SANDRA THOMPSON TRUSTDirector | 18K | $1.4M | 0.013% | 2025-11-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-10-14 | BRIAN MCCARTHYOfficer | 40K | $3.3M | 0.028% | 2025-10-13 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-09-17 | KIRAN KUMAR CHOUDARYOfficer | 21K | $1.6M | 0.015% | 2025-09-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-09-16 | Arvind NithrakashyapOfficer, Director | 41K | $3.1M | 0.029% | 2025-09-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-09-16 | Brian K. McCarthyOfficer | 5K | $364K | 0.003% | 2025-09-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-09-16 | Kiran Kumar ChoudaryOfficer | 7K | $514K | 0.005% | 2025-09-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON7 holders report 5% or more of RBRK in their latest filing, all on Schedule 13G (passive). The largest reported stake is AQR Capital Management, LLC at 6.2% of the class (9,948,468 shares), filed 2026-08-13 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-14 | 13G/Ano. 4 | LS SPV Management, LLCother entity | 3.3M | 2.0% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed Venture Partners IX, L.P.partnership | 3.1M | 1.9% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed Ultimate General Partner IX, Ltd.other entity | 3.1M | 1.9% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed General Partner IX, L.P.partnership | 3.1M | 1.9% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed SPV I, LLCother entity | 1.4M | 0.9% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed SPV I-B, LLCother entity | 1.1M | 0.7% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed SPV I-C, LLCother entity | 777K | 0.5% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed General Partner Select II, L.P.partnership | 725K | 0.4% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed Venture Partners Select II, L.P.partnership | 725K | 0.4% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 4 | Lightspeed Ultimate General Partner Select II, Ltd.other entity | 725K | 0.4% | 2026-06-30 |
| 2026-08-13 | 13G | AQR Capital Management, LLCinvestment adviser | 9.9M | 6.2% | 2026-06-30 |
| 2026-08-13 | 13G | AQR Capital Management Holdings, LLCparent holding company | 9.9M | 6.2% | 2026-06-30 |
| 2026-07-31 | 13G | Vanguard Capital Managementinvestment adviser | 8.1M | 5.0% | 2026-06-30 |
| 2026-05-06 | 13G | FMR LLCparent holding company | 8.4M | 5.3% | 2026-03-31 |
| 2026-05-06 | 13G | Abigail P. Johnsonindividual | 8.4M | 5.3% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 8.1M | 5.1% | 2026-03-31 |
| 2026-04-27 | 13G | BlackRock, Inc.parent holding company | 8.3M | 5.3% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 3 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 3 | Lightspeed Venture Partners X, L.P.partnership | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 3 | Lightspeed General Partner X, L.P.partnership | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 3 | Lightspeed Ultimate General Partner X, Ltd.other entity | 0 | 0.0% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 3 | Lightspeed Management Company, L.L.C.other entity | 0 | 0.0% | 2025-12-31 |
13F holders
Tracked managers holding RBRK at their latest 13F. JSON7 of the 30 tracked managers held RBRK at their latest 13F, $912.8M in total at quarter-end prices. AQR Capital Management is the largest at $780.1M (0.3% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 9.9M | $780.1M | 0.27% | +7.7M |
| Two Sigma Investments | 2026-06-30 | 561K | $45.0M | 0.03% | -1.8M |
| Renaissance Technologies | 2026-06-30 | 509K | $40.9M | 0.06% | +132K |
| ARK Investment Management | 2026-06-30 | 365K | $29.3M | 0.19% | -30K |
| Millennium Management | 2026-06-30 | 131K | $10.5M | 0.00% | -269K |
| Point72 Asset Management | 2026-06-30 | 53K | $4.3M | 0.00% | +32K |
| D. E. Shaw & Co. | 2026-06-30 | 33K | $2.7M | 0.00% | -277 |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Rubrik in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Rubrik (RBRK), SEC CIK 1943896, listed on NYSE, classified by the SEC as services-prepackaged software. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-28.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-03.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-27.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-07.JSON and CSV
- Company record
- EDGAR filing index for CIK 1943896Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as services-prepackaged software
Other company pages
Datasets
Frequently Asked Questions
How much of RBRK is sold short?
13,243,582 shares were held short at the 2026-10-15 settlement, 4.6 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is RBRK's daily short volume?
On 2026-10-28, 702,991 of the 1,352,971 RBRK shares reported to FINRA were sold short, 52.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does RBRK have fails to deliver?
The SEC's latest file shows 300 RBRK shares failed to deliver at settlement 2026-09-28. Fails are reported per settlement date and published twice a month with a lag.
Are RBRK insiders buying or selling?
Insiders at RBRK reported 73 open-market sells worth $17.3M in the last 90 days and no open-market buys. Latest filing: Nithrakashyap Arvind (Chief Technology Officer) on 2026-10-07.
Have RBRK insiders filed to sell?
27 Form 144 notices on file for RBRK worth $53.6M at the prices reported; 3 in the last 90 days worth $3.1M. Latest: YVONNE WASSENAAR filed on 2026-09-03 to sell 2,163 shares ($189K) from 2026-09-03.
Who owns 5% or more of RBRK?
7 holders report 5% or more of RBRK in their latest filing, all on Schedule 13G (passive). The largest reported stake is AQR Capital Management, LLC at 6.2% of the class (9,948,468 shares), filed 2026-08-13 for an event on 2026-06-30.
Which tracked 13F managers own RBRK?
7 of the 30 tracked 13F managers held RBRK shares at their latest filing, $912.8M in all. The largest: Cliff Asness's AQR Capital Management (9.9M shares, $780.1M), Two Sigma Investments (561K shares, $45.0M), Renaissance Technologies (509K shares, $40.9M), Cathie Wood's ARK Investment Management (365K shares, $29.3M), Izzy Englander's Millennium Management (131K shares, $10.5M), Steve Cohen's Point72 Asset Management (53K shares, $4.3M). The table above lists all 7.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.