View the latest insider transactions and institutional holdings for QS. Analyze how executives and major investors are positioning.
| Insider Name | Relationship | Trade Date | Transaction | Price/Share | Shares Traded | Total Value ($) | Total Holdings | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| Buss Brad W | Director | Oct 31 '25 | Sale | 17.98 | 300,000 | 5,392,580 | 122,476 | Oct 31 06:57 PM |
| BRAD BUSS | Director | Oct 31 '25 | Proposed Sale | 17.98 | 300,000 | 5,392,580 | Oct 31 04:10 PM | |
| MICHAEL MCCARTHY | Officer | Oct 30 '25 | Proposed Sale | 15.78 | 50,000 | 788,985 | Oct 30 04:05 PM | |
| MCCARTHY MICHAEL O III | CHIEF LEGAL OFFICER | Oct 30 '25 | Sale | 15.78 | 50,000 | 788,985 | 1,376,118 | Oct 31 06:55 PM |
| VARUN SIVARAM LIVING TRUST | Affiliate | Oct 27 '25 | Proposed Sale | 17.05 | 30,000 | 511,570 | Oct 27 04:14 PM | |
| Sivaram Srinivasan | CHIEF EXECUTIVE OFFICER | Oct 27 '25 | Sale | 17.05 | 90,000 | 1,534,761 | 360,000 | Oct 28 08:59 PM |
| THE SAYA SIVARAM LIVING TRUST | Affiliate | Oct 27 '25 | Proposed Sale | 17.05 | 30,000 | 511,509 | Oct 27 04:09 PM | |
| UTTARA SIVARAM LIVING TRUST | Affiliate | Oct 27 '25 | Proposed Sale | 17.05 | 30,000 | 511,632 | Oct 27 04:26 PM | |
| Buss Brad W | Director | Oct 24 '25 | Sale | 15.75 | 400,000 | 6,299,280 | 122,476 | Oct 28 08:59 PM |
| MCCARTHY MICHAEL O III | CHIEF LEGAL OFFICER | Oct 24 '25 | Sale | 15.26 | 46,264 | 706,040 | 1,376,118 | Oct 28 09:01 PM |
| Sivaram Srinivasan | CHIEF EXECUTIVE OFFICER | Oct 24 '25 | Sale | 16.61 | 30,000 | 498,306 | 4,132,700 | Oct 28 08:59 PM |
| SRINIVASAN SIVARAM | Officer | Oct 24 '25 | Proposed Sale | 16.61 | 30,000 | 498,306 | Oct 24 05:22 PM | |
| BRAD BUSS | Director | Oct 24 '25 | Proposed Sale | 15.75 | 400,000 | 6,299,270 | Oct 24 04:13 PM | |
| MOHIT SINGH | Officer | Oct 24 '25 | Proposed Sale | 15.09 | 220,000 | 3,318,845 | Oct 24 04:16 PM | |
| MICHAEL MCCARTHY | Officer | Oct 24 '25 | Proposed Sale | 15.26 | 46,264 | 706,042 | Oct 24 04:09 PM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | Oct 24 '25 | Sale | 15.09 | 220,000 | 3,318,854 | 1,420,054 | Oct 28 09:00 PM |
| Prinz Fritz | Director | Oct 24 '25 | Sale | 15.49 | 19,122 | 296,133 | 142,221 | Oct 28 08:58 PM |
| Friedrich Prinz | Director | Oct 24 '25 | Proposed Sale | 16.82 | 1,000,000 | 16,820,000 | Oct 24 04:40 PM | |
| Holme Timothy | CHIEF TECHNOLOGY OFFICER | Oct 03 '25 | Sale | 15.52 | 44,923 | 697,142 | 0 | Oct 03 07:51 PM |
| Kevin Hettrich | Officer | Oct 01 '25 | Proposed Sale | 14.59 | 9,800 | 142,982 | Oct 01 05:33 PM | |
| Straubel Jeffrey B | Director | Oct 01 '25 | Sale | 13.94 | 157,171 | 2,190,508 | 321,040 | Oct 03 07:48 PM |
| Jeffrey B. Straubel | Director | Oct 01 '25 | Proposed Sale | 14.59 | 157,171 | 2,293,125 | Oct 01 05:33 PM | |
| Hettrich Kevin | CHIEF FINANCIAL OFFICER | Oct 01 '25 | Sale | 13.94 | 9,800 | 136,643 | 1,591,467 | Oct 03 07:50 PM |
| MICHAEL MCCARTHY | Officer | Sep 12 '25 | Proposed Sale | 9.13 | 38,035 | 347,267 | Sep 12 04:11 PM | |
| Jeffrey B. Straubel | Director | Sep 12 '25 | Proposed Sale | 9.95 | 157,180 | 1,563,941 | Sep 12 07:16 PM | |
| MCCARTHY MICHAEL O III | CHIEF LEGAL OFFICER | Sep 12 '25 | Sale | 9.13 | 38,035 | 347,267 | 1,397,382 | Sep 16 08:07 PM |
| Hettrich Kevin | CHIEF FINANCIAL OFFICER | Sep 12 '25 | Sale | 9.20 | 9,800 | 90,178 | 1,601,267 | Sep 16 08:08 PM |
| Straubel Jeffrey B | Director | Sep 12 '25 | Sale | 9.20 | 157,180 | 1,446,009 | 348,146 | Sep 16 08:06 PM |
| Kevin Hettrich | Officer | Sep 12 '25 | Proposed Sale | 9.95 | 9,800 | 97,510 | Sep 12 07:17 PM | |
| Holme Timothy | CHIEF TECHNOLOGY OFFICER | Sep 08 '25 | Sale | 9.63 | 6,362 | 61,247 | 0 | Sep 08 07:12 PM |
| Holme Timothy | CHIEF TECHNOLOGY OFFICER | Sep 04 '25 | Sale | 7.55 | 38,561 | 291,082 | 0 | Sep 08 07:12 PM |
| Timothy Holme | Officer | Sep 04 '25 | Proposed Sale | 7.65 | 455,884 | 3,487,513 | Sep 04 05:42 PM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | Aug 19 '25 | Sale | 8.65 | 23,598 | 204,165 | 1,577,079 | Aug 20 04:19 PM |
| Singh Mohit | Officer | Aug 19 '25 | Proposed Sale | 8.65 | 23,598 | 204,165 | Aug 19 09:49 AM | |
| Singh Mohit | Officer | Aug 18 '25 | Proposed Sale | 9.03 | 47,727 | 430,975 | Aug 18 07:52 PM | |
| Sivaram Srinivasan | Officer | Aug 18 '25 | Proposed Sale | 9.03 | 100,178 | 904,607 | Aug 18 07:51 PM | |
| MCCARTHY MICHAEL O III | Officer | Aug 18 '25 | Proposed Sale | 9.03 | 45,371 | 409,700 | Aug 18 07:50 PM | |
| Hettrich Kevin | Officer | Aug 18 '25 | Proposed Sale | 9.03 | 46,837 | 422,938 | Aug 18 07:49 PM | |
| Holme Timothy | Officer | Aug 18 '25 | Proposed Sale | 9.03 | 47,727 | 430,975 | Aug 18 07:48 PM | |
| MICHAEL MCCARTHY | Officer | Jul 25 '25 | Proposed Sale | 11.60 | 500,000 | 5,798,840 | Jul 25 04:04 PM | |
| JUERGEN LEOHOLD | FORMER DIRECTOR/CONSULTANT | Jul 25 '25 | Proposed Sale | 11.60 | 144,951 | 1,681,840 | Jul 25 04:04 PM | |
| Friedrich Prinz | Director | Jul 25 '25 | Proposed Sale | 12.63 | 1,000,000 | 12,630,000 | Jul 25 04:19 PM | |
| Prinz Fritz | Director | Jul 25 '25 | Sale | 11.62 | 70,187 | 815,397 | 161,343 | Jul 25 06:18 PM |
| MCCARTHY MICHAEL O III | CHIEF LEGAL OFFICER | Jul 25 '25 | Sale | 11.60 | 500,000 | 5,798,850 | 1,467,183 | Jul 29 05:19 PM |
| Huppertz Susan | Former Director | Jul 14 '25 | Proposed Sale | 10.00 | 50,000 | 500,091 | Jul 14 09:05 PM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | Jul 08 '25 | Sale | 8.21 | 465,000 | 3,819,324 | 1,641,711 | Jul 10 05:08 PM |
| Singh Mohit | Officer | Jul 08 '25 | Proposed Sale | 8.21 | 465,000 | 3,819,324 | Jul 08 01:43 PM | |
| Holme Timothy | CHIEF TECHNOLOGY OFFICER | Jul 07 '25 | Sale | 7.02 | 11,906 | 83,554 | 0 | Jul 08 08:20 PM |
| Timothy Holme | Officer | Jul 03 '25 | Proposed Sale | 7.02 | 1,302,600 | 9,144,252 | Jul 03 07:32 PM | |
| Prinz Fritz | Director | Jul 03 '25 | Sale | 7.02 | 864,708 | 6,072,325 | 81,364 | Jul 08 08:20 PM |
| Holme Timothy | CHIEF TECHNOLOGY OFFICER | Jul 03 '25 | Sale | 7.03 | 98,073 | 688,982 | 11,906 | Jul 08 08:20 PM |
| Friedrich Prinz | Director | Jul 03 '25 | Proposed Sale | 7.02 | 864,708 | 6,070,250 | Jul 03 07:36 PM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | Jun 26 '25 | Sale | 7.21 | 325,000 | 2,343,608 | 1,641,711 | Jun 27 06:59 PM |
| Singh Mohit | Officer | Jun 26 '25 | Proposed Sale | 7.21 | 325,000 | 2,343,608 | Jun 26 03:52 PM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | Jun 25 '25 | Sale | 5.96 | 290,000 | 1,727,675 | 1,641,711 | Jun 27 06:59 PM |
| Singh Mohit | Officer | Jun 25 '25 | Proposed Sale | 5.96 | 290,000 | 1,727,675 | Jun 25 11:34 AM | |
| Leohold Jurgen | Director | Jun 04 '25 | Proposed Sale | 4.09 | 10,274 | 42,021 | Jun 04 06:16 PM | |
| Prinz Fritz | Director | May 22 '25 | Sale | 3.94 | 61,523 | 242,228 | 231,530 | May 23 09:31 PM |
| Friedrich Prinz | Director | May 22 '25 | Proposed Sale | 3.97 | 61,523 | 244,246 | May 22 05:54 PM | |
| Hettrich Kevin | CHIEF FINANCIAL OFFICER | May 22 '25 | Option Exercise | 1.88 | 107,069 | 200,897 | 1,648,088 | May 23 09:31 PM |
| Singh Mohit | Officer | May 19 '25 | Proposed Sale | 4.41 | 71,428 | 315,319 | May 19 10:17 AM | |
| Singh Mohit | CHIEF DEVELOPMENT OFFICER | May 19 '25 | Sale | 4.41 | 71,428 | 315,319 | 1,640,998 | May 20 06:03 PM |
| MCCARTHY MICHAEL O III | Officer | May 16 '25 | Proposed Sale | 4.26 | 94,568 | 402,860 | May 16 05:49 PM | |
| Sivaram Srinivasan | Officer | May 16 '25 | Proposed Sale | 4.26 | 185,608 | 790,690 | May 16 05:51 PM | |
| Hettrich Kevin | Officer | May 16 '25 | Proposed Sale | 4.26 | 96,404 | 410,681 | May 16 05:48 PM | |
| Holme Timothy | Officer | May 16 '25 | Proposed Sale | 4.26 | 95,226 | 405,663 | May 16 05:47 PM | |
| Singh Mohit | Officer | May 16 '25 | Proposed Sale | 4.26 | 95,226 | 405,663 | May 16 05:50 PM |
| Report Date | Institution | % Held | Shares Held | Value ($) | % Change QoQ |
|---|---|---|---|---|---|
| 2025-06-30 | Coatue Management LLC | 0.76% | 4,294,995 | 73,315,563 | 0.00% |
| 2025-06-30 | Blackrock Inc. | 3.04% | 17,091,756 | 291,756,269 | 7.91% |
| 2025-06-30 | State Street Corporation | 1.16% | 6,513,064 | 111,178,000 | 6.79% |
| 2025-06-30 | UBS Group AG | 0.91% | 5,142,185 | 87,777,096 | 11.93% |
| 2025-06-30 | Susquehanna International Group, LLP | 0.78% | 4,369,431 | 74,586,185 | -18.65% |
| 2025-06-30 | Geode Capital Management, LLC | 1.23% | 6,914,680 | 118,033,585 | 12.50% |
| 2025-06-30 | Capricorn Investment Group LLC | 2.63% | 14,794,635 | 252,544,414 | 0.00% |
| 2025-06-30 | Dimensional Fund Advisors LP | 1.09% | 6,132,477 | 104,681,380 | -0.18% |
| 2025-06-30 | Vanguard Group Inc | 6.44% | 36,212,854 | 618,153,406 | 2.44% |
| 2025-06-30 | Shaw D.E. & Co., Inc. | 1.52% | 8,538,979 | 145,760,368 | 596.27% |
