Boost Run Inc.
BRUN- Exchange
- Nasdaq
- Industry
- Services-Computer Processing & Data Preparation
- SEC CIK
- 0002090646
In the last 90 days, Boost Run Inc. insiders filed 0 open-market purchases and 2 sales; 81 institutions reported holding it in 13F filings for Q2 2026, worth $623.7M in total; no superinvestor holds it.
Holders of 5% or more of BRUN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Boost Run Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Karos Andrew | 13D | 48.08%29.5M shares | New | May 15, 20261 filing | May 15, 2026 | SEC |
| Georgakopoulos Harilaos | 13D | 25.13%8.02M shares | New | May 15, 20261 filing | May 15, 2026 | SEC |
| Weil B. Luke | 13D | 12.25%3.91M shares | +2.28 ppfrom 9.97% | May 15, 20262 filings | Jun 15, 2026 | SEC |
| TOMS Capital Investment Management LP | 13G | 9.80%3.13M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| Goodrich Sean | 13D/A | 8.88%4.44M shares | −1.40 ppfrom 10.28% | May 15, 20264 filings | Sep 16, 2026 | SEC |
| Goodrich ILMJS LLC | 13D | 6.48%2.07M shares | New | May 18, 20261 filing | May 18, 2026 | SEC |
| FMR LLC | 13G | 5.60%1.78M shares | New | Aug 6, 20261 filing | Aug 6, 2026 | SEC |
| Citadel Advisors LLC | 13G | 5.50%1.74M shares | New | May 21, 20261 filing | May 21, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
12 Schedule 13D and 13G filings on Boost Run Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Sep 16, 20264:30 PM ET | Goodrich Seanand 1 other | 13D/A | 8.88%4.44M shares | −1.40 ppfrom 10.28% | Sep 14, 2026 | SEC |
| Aug 28, 20264:35 PM ET | Goodrich Seanand 1 other | 13D/A | 10.28%5.14M shares | −2.37 ppfrom 12.65% | Aug 19, 2026 | SEC |
| Aug 14, 20262:45 PM ET | TOMS Capital Investment Management LP | 13G | 9.80%3.13M shares | New | Jun 30, 2026 | SEC |
| Aug 6, 202610:17 AM ET | FMR LLCand 1 other | 13G | 5.60%1.78M shares | New | Jun 30, 2026 | SEC |
| Jun 15, 20265:28 PM ET | Goodrich Seanand 1 other | 13D | 12.65%4.03M shares | +6.17 ppfrom 6.48% | May 12, 2026 | SEC |
| Jun 15, 20265:24 PM ET | Weil B. Lukeand 1 other | 13D | 12.25%3.91M shares | +2.28 ppfrom 9.97% | May 12, 2026 | SEC |
| May 21, 20265:17 PM ET | Citadel Advisors LLCand 6 others | 13G | 5.50%1.74M shares | New | May 14, 2026 | SEC |
| May 18, 20269:51 PM ET | Goodrich ILMJS LLC | 13D | 6.48%2.07M shares | New | May 8, 2026 | SEC |
| May 15, 20269:57 PM ET | Goodrich Sean | 13D | 6.48%2.07M shares | New | May 8, 2026 | SEC |
| May 15, 20269:37 PM ET | Weil B. Lukeand 1 other | 13D | 9.97%3.29M shares | New | May 8, 2026 | SEC |
| May 15, 20269:13 PM ET | Georgakopoulos Harilaosand 1 other | 13D | 25.13%8.02M shares | New | May 8, 2026 | SEC |
| May 15, 20268:59 PM ET | Karos Andrew | 13D | 48.08%29.5M shares | New | May 8, 2026 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Boost Run Inc. shares.
No Form 144 notices for Boost Run Inc. are on file.