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Boost RUN (BRUN): which funds own it

Information Technology →(by SIC code, unreviewed)Data as of Jun 30, 2026 (Q2 2026) · updated on Nov 5, 2026

A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.

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Sections with a free account

1 concentrated manager holds it (+1 vs last quarter) with a median weight of 0.2%.

Who owns Boost RUN?

Holders that filed a Schedule 13D or 13G with the SEC for owning more than 5% of the Class A shares: Andrew Karos (13D filed May 15, 2026), Harilaos Georgakopoulos (13D filed May 15, 2026), B. Luke Weil (13D filed Jun 15, 2026), TOMS Capital Investment Management (13G filed Aug 14, 2026) and Sean Goodrich (13D/A filed Sep 16, 2026). As of Jun 30, 2026, the largest holders of Class A reported on Form 13F were TOMS Capital Investment Management (9.8% of Class A), FMR (5.6%) and Citadel Advisors (4.1%).

Which institutions hold the most Boost RUN shares?

Per Form 13F filings as of Jun 30, 2026, as a share of Class A:

  1. 1. TOMS Capital Investment Management: 9.8%
  2. 2. FMR: 5.6%
  3. 3. Citadel Advisors: 4.1%
  4. 4. D. E. Shaw: 3.9%
  5. 5. UBS Group: 2.7%
  6. 6. AWM Investment: 2.6%
  7. 7. Hiddenite Capital Partners: 2.4%
  8. 8. Capricorn Fund Managers: 2.4%
  9. 9. Wellington Management Group LLP: 1.9%
  10. 10. Yorkville Advisors Global: 1.8%

How much of Boost RUN do institutions own?

The 80 institutions that file 13F reported 50.5% of the Class A shares as of Jun 30, 2026.

Sources:13D by Andrew Karos (May 15, 2026) ↗13D by Harilaos Georgakopoulos (May 15, 2026) ↗13D by B. Luke Weil (Jun 15, 2026) ↗13G by TOMS Capital Investment Management (Aug 14, 2026) ↗13D/A by Sean Goodrich (Sep 16, 2026) ↗All of the company's proxy statements on EDGAR ↗

13F percentages divide the shares each institution reports by the Class A shares outstanding on the cover of the company's latest report before the quarter end (Jun 1, 2026). Entities of the same group file separately and are not added up. With more than one share class, a 13D or 13G counts shares convertible from another class as owned, so we do not show its percentage. We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.

Concentrated managers
1
All 13F: 81
Consensus
—
No score: it needs 5 or more concentrated managers
Price at Jun 30, 2026 (per 13F)
$38.81
reported value ÷ shares, not the quote · See current quote ↗

Quarter flow (concentrated managers)

Change in managers (0 → 1): 1 opened · 0 exited = +1

Net flow in the quarter: +$1.0M (+26 K shares) · bought $1.0M and sold $0Shares concentrated managers added minus those they cut, valued at the 13F quarter-end implied price, not each trade's price. It is a different measure from the change in managers: the two can have opposite signs.

Concentrated managers holding it

Up to 15, sorted by position value. The percentage is the weight in each manager's portfolio.

Largest holders of BRUN (all 13F filers)

  • TOMS Capital Investment Management3.1 MType not verified · 9.80% of the company+3.1 M
  • FMR1.8 MInvestment firm · 5.59% of the company+1.8 M
  • Citadel Advisors1.3 MQuant or multi-manager · 4.14% of the company+1.3 M
  • D. E. Shaw1.3 MQuant or multi-manager · 3.92% of the company+1.3 M
  • UBS Group860 KBank or trading desk · 2.70% of the company+860 K
  • AWM Investment814 KType not verified · 2.55% of the company+814 K
  • Hiddenite Capital Partners750 KType not verified · 2.35% of the company+750 K
  • Capricorn Fund Managers750 KInvestment firm · 2.35% of the company+750 K
  • Wellington Management Group LLP619 KInvestment firm · 1.94% of the company+619 K
  • Yorkville Advisors Global582 KType not verified · 1.83% of the company+582 K

The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.

Fundamentals

Balance sheet only, for now. BRUN has not yet filed its first annual report (10-K) with the SEC, so there are no 12-month figures (revenue, margins, earnings and cash flow). We show the balance sheet from its latest filing; once the 12-month figures are available, this section fills in automatically.

Balance sheet as of Jun 30, 2026
Cash and equivalents
$120M
Shareholders' equity
$100M

Balance sheet figures the company filed with the SEC (10-Q or 10-K), in dollars. Net debt = total debt − cash − investments; when negative, the company has more cash than debt (net cash). How each figure is calculated

Insiders (Form 4)

Officers and directors who bought (6 m)
0
Amount (6 m)
$0
CEO/CFO bought (12 m)
No

10% owners who bought (6 m): 0

Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.

Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →

Above 5% (13D/13G)

Disclosed stakes, with their amendments. A filing is not always a purchase: there are also reductions and changes of filing entity.

This list may be incomplete: we hold 13D and 13G filings made since Dec 23, 2024. A holder above 5% that has not filed anything since then is not shown here.

Above 5% over time (13D/13G)

Each holder with its filings in order. History since December 2024.

Flagged material events (8-K)

  • May 14, 2026Seriousfiling ↗

    Notice of delisting or failure to meet a listing rule (Item 3.01)

    «Index to Financial Statements»

  • May 14, 2026Mediumfiling ↗

    Change of auditor (Item 4.01)

    «Index to Financial Statements»

  • Oct 5, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

  • May 14, 2026Routinefiling ↗

    Unregistered sale of equity securities (Item 3.02)

    «Index to Financial Statements»

  • May 14, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

    «Index to Financial Statements»

Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.

All material events (8-K)

Earnings, agreements, financing, management changes and announcements from the last year, with a filter by type and a link to each filing.

Other Information Technology stocks in managers' portfolios

Same sector and a similar number of concentrated managers holding them. It is a list to keep exploring, not a recommendation.

All of Information Technology →

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