Vault-13

BOOST RUN INC BRUN

ORD SHS CL A · Common Stock · CUSIP 09940T100

79 institutional holders
16,043,47116.0m shares reported held*
$621.1mreported value*

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $38.71. Options: 14 managers hold calls ($55.5m notional), 11 hold puts ($68.9m).

Trends to Q2 2026

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20m$40m$60m$80mQ3 25 calls: $0Q3 25 puts: $0Q3 25P/C —Q4 25 calls: $0Q4 25 puts: $0Q4 25P/C —Q1 26 calls: $0Q1 26 puts: $0Q1 26P/C —Q2 26 calls: $55.5mQ2 26 puts: $68.9mQ2 26P/C 1.24
Numbers
QuarterCallsPutsP/C
Q3 2025$0$0—
Q4 2025$0$0—
Q1 2026$0$0—
Q2 2026$55.5m$68.9m1.24

Biggest buyers

TOMS Capital Investment Management LP New +3,125,000+3.1m
FMR LLC New +1,782,250+1.8m
CITADEL ADVISORS LLC New +1,320,722+1.3m
D. E. Shaw & Co., Inc. New +1,250,546+1.3m
UBS Group AG New +860,043+860.0k
AWM Investment Company, Inc. New +813,739+813.7k
Hiddenite Capital Partners LP New +750,000+750.0k
Capricorn Fund Managers Ltd New +750,000+750.0k
WELLINGTON MANAGEMENT GROUP LLP New +619,239+619.2k
Yorkville Advisors Global, LP New +582,367+582.4k

Biggest sellers

None

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $18.3m472.7k shares
CITADEL ADVISORS LLC New $11.0m283.8k shares
GROUP ONE TRADING LLC New $6.3m162.6k shares
JANE STREET GROUP, LLC New $6.0m153.8k shares
SCOGGIN MANAGEMENT LP New $4.9m125.0k shares
IMC-Chicago, LLC New $2.9m74.2k shares
UBS Group AG New $1.9m47.9k shares
SIMPLEX TRADING, LLC New $1.5m38.1k shares
Walleye Trading LLC New $1.3m34.5k shares
Arrington Capital Management, LLC New $621.0k16.0k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $28.1m723.4k shares
CITADEL ADVISORS LLC New $11.1m287.0k shares
SCOGGIN MANAGEMENT LP New $8.7m225.0k shares
JANE STREET GROUP, LLC New $7.1m184.0k shares
GROUP ONE TRADING LLC New $5.5m142.2k shares
Caption Management, LLC New $3.9m100.0k shares
SIMPLEX TRADING, LLC New $1.5m39.6k shares
IMC-Chicago, LLC New $1.5m38.8k shares
HRT FINANCIAL LP New $1.0m25.8k shares
BARCLAYS PLC New $271.7k7.0k shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Karos Andrew 13D · may seek influence new · filed 2026-05-15
Stated purposeThe information regarding the Business Combination set forth in Item 3 above is incorporated into this Item 4 by reference. Reporting Person serves a member of the Board of Directors and as the Chief Executive Officer of the Issuer, and, in such capacity, may have influence over the corporate activities of the Issuer, including activities which may relate to items described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Except as described in this Schedule 13D, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Person, at any time, and from time to time, may review, recons… Full filing
48.1% new 29.5m≈ $1.1bn 2026-05-15
Georgakopoulos Harilaos 13D · may seek influence new · filed 2026-05-15
Stated purposeThe information regarding the Business Combination set forth in Item 3 above is incorporated into this Item 4 by reference. Harilaos Georgakopoulos serves a member of the Board of Directors and as the Chief Operating Officer of the Issuer, and, in such capacity, may have influence over the corporate activities of the Issuer, including activities which may relate to items described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Except as described in this Schedule 13D, the Reporting Persons do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Persons, at any time, and from time to time, may review, r… Full filing
25.1% new 8.0m≈ $311.1m 2026-05-15
Weil B. Luke 13D · may seek influence +2.3 pts · filed 2026-06-15
Stated purposeThe Reporting Persons acquired their securities in connection with the formation and initial public offering of Willow Lane Acquisition Corp. and the subsequent business combination (the "Business Combination") between Willow Lane Acquisition Corp. and Boost Run Holdings, LLC, which closed on May 8, 2026. On June 9, 2026, the Sponsor transferred 1,272,885 shares of Class A Common Stock and 1,101,986 Private Warrants to the SPV pursuant to the Transfer Agreement. In connection with this transfer, the Company instructed Continental Stock Transfer & Trust Company, the Company's transfer agent, to remove the escrow legend from the transferred securities and to deliver such securities to the SPV bearing the Insider Letter Agreement legend and the Rule 144 affiliate legend. Mr. Weil serves as … Full filing
12.2% +2.3 pts 3.9m≈ $151.6m 2026-06-15
TOMS Capital Investment Management LP 13G · institution new · filed 2026-08-14 9.8% new 3.1m≈ $121.3m 2026-08-14
Goodrich Sean 13D · may seek influence -1.4 pts · filed 2026-09-16
Stated purposeOn September 14, the Reporting Persons, directly and indirectly sold 500,000 shares of Class A Common Stock at a price of $14.00 per share in an open market transaction. The shares were sold for investment purposes in the ordinary course. Mr. Goodrich serves as a non-employee member of the Board of Directors of Boost Run Inc. As a director of the Company, Mr. Goodrich may have influence over the corporate activities of the Company, including activities which may relate to the transactions described in clauses (a) through (j) of Item 4 of Schedule 13D. The Reporting Persons may from time to time acquire additional securities of the Company, or sell or otherwise dispose of securities of the Company, in open market transactions, in privately negotiated transactions, or otherwise, in any ma… Full filing
8.9% -1.4 pts 4.4m≈ $172.2m 2026-09-16
Goodrich ILMJS LLC 13D · may seek influence new · filed 2026-05-18
Stated purposeThe information regarding the Business Combination set forth in Item 3 above is incorporated into this Item 4 by reference. Sean Goodrich is the managing member of Goodrich ILMJS LLC. Mr. Goodrich serves as a member of the Board of Directors of the Issuer, and, in such capacity, may have influence over the corporate activities of the Issuer, including activities which may relate to items described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Except as described in this Schedule 13D, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Person, at any time, and from time to … Full filing
6.5% new 2.1m≈ $80.2m 2026-05-18
FMR LLC 13G · institution new · filed 2026-08-06 5.6% new 1.8m≈ $69.2m 2026-08-06
CITADEL ADVISORS LLC 13G · passive investor new · filed 2026-05-21 5.5% new 1.7m≈ $67.5m 2026-05-21

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
101Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 1 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—0——
Q1 20260—0——
Q2 20260—0——
Q3 20260—1$11.0m—
DateInsiderTradeSharesPrice ValueTheir holding
2026-09-14 Goodrich Sean Director · By Goodrich ILJMS LLC Sold 500,000 $14.00 $7.0m500.0k shares -10%
2026-08-27 Goodrich Sean Director · By Goodrich ILJMS LLC Sold 198,200 $20.15 $4.0m198.2k shares -4%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 TOMS Capital Investment Management LP 6.40% of their portfolio NEW YORK, NY 3,125,0003.1m $121.3m $121.3m 6.40% New
2 FMR LLC 0.00% of their portfolio BOSTON, MA 1,782,2501.8m $69.2m $69.2m 0.00% New
3 CITADEL ADVISORS LLC 0.03% of their portfolio MIAMI, FL 1,320,7221.3m $51.3m $51.3m 0.03% New
4 D. E. Shaw & Co., Inc. 0.03% of their portfolio New York, NY 1,250,5461.3m $48.5m $48.5m 0.03% New
5 UBS Group AG 0.01% of their portfolio ZURICH, V8 860,043860.0k $33.4m $33.4m 0.01% New
6 AWM Investment Company, Inc. 2.74% of their portfolio NEW YORK, NY 813,739813.7k $31.6m $31.6m 2.74% New
7 Hiddenite Capital Partners LP 7.15% of their portfolio NEW YORK, NY 750,000750.0k $29.1m $29.1m 7.15% New
8 Capricorn Fund Managers Ltd 2.33% of their portfolio LONDON, X0 750,000750.0k $29.1m $29.1m 2.33% New
9 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 619,239619.2k $24.0m $24.0m 0.00% New
10 Yorkville Advisors Global, LP 26.21% of their portfolio MOUNTAINSIDE, NJ 582,367582.4k $22.6m $22.6m 26.21% New
11 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 490,680490.7k $19.0m $19.0m 0.00% New
12 Harraden Circle Investments, LLC 2.31% of their portfolio NEW YORK, NY 466,375466.4k $18.1m $18.1m 2.31% New
13 SCOGGIN MANAGEMENT LP 3.15% of their portfolio NEW YORK, NY 342,500342.5k $13.3m $13.3m 3.15% New
14 Magnetar Financial LLC 0.10% of their portfolio EVANSTON, IL 291,975292.0k $11.3m $11.3m 0.10% New
15 BlackRock, Inc. 0.00% of their portfolio New York, NY 273,575273.6k $10.6m $10.6m 0.00% New
16 Linden Advisors LP 0.03% of their portfolio New York, NY 191,707191.7k $6.7m $6.7m 0.03% New
17 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 157,105157.1k $6.1m $6.1m 0.00% New
18 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 150,150150.2k $5.8m $5.8m 0.00% New
19 Periscope Capital Inc. 0.68% of their portfolio Toronto, A6 127,988128.0k $4.3m $4.3m 0.68% New
20 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 113,368113.4k $4.4m $4.4m 0.00% New
21 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 110,357110.4k $4.3m $4.3m 0.00% New
22 NEXT CENTURY GROWTH INVESTORS LLC 0.22% of their portfolio PLYMOUTH, MN 105,506105.5k $4.1m $4.1m 0.22% New
23 FirstWave Capital Management LLC 1.52% of their portfolio MIAMI, FL 88,63188.6k $3.4m $3.4m 1.52% New
24 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 83,48883.5k $3.2m $3.2m 0.00% New
25 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 82,51282.5k $3.2m $3.2m 0.00% New
26 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 80,53980.5k $3.1m $3.1m 0.00% New
27 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 70,91270.9k $2.8m $2.8m 0.00% New
28 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 65,79065.8k $2.6m $2.6m 0.00% New
29 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 62,68862.7k $2.4m $2.4m 0.00% New
30 NOMURA HOLDINGS INC 0.01% of their portfolio TOKYO, M0 60,86960.9k $2.4m $2.4m 0.01% New
31 GROUP ONE TRADING LLC 0.06% of their portfolio CHICAGO, IL 53,41853.4k $2.1m $2.1m 0.06% New
32 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 52,54052.5k $2.0m $2.0m 0.00% New
33 Murchinson Ltd. 0.97% of their portfolio TORONTO, A6 52,00052.0k $2.0m $2.0m 0.97% New
34 XTX Topco Ltd 0.03% of their portfolio LONDON, X0 51,99352.0k $2.0m $2.0m 0.03% New
35 MOORE CAPITAL MANAGEMENT, LP 0.04% of their portfolio NEW YORK, NY 50,00050.0k $1.9m $1.9m 0.04% New
36 BlueCrest Capital Management Ltd 0.08% of their portfolio ST HELIER, Y9 50,00050.0k $1.9m $1.9m 0.08% New
37 Kestra Advisory Services, LLC 0.00% of their portfolio AUSTIN, TX 36,62536.6k $1.4m $1.4m 0.00% New
38 IMC-Chicago, LLC 0.01% of their portfolio CHICAGO, IL 35,81435.8k $1.4m $1.4m 0.01% New
39 WEXFORD CAPITAL LP 0.19% of their portfolio WEST PALM BEACH, FL 35,00035.0k $1.4m $1.4m 0.19% New
40 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 29,73329.7k $1.2m $1.2m 0.00% New
41 Galaxy Digital Capital Management GP LLC 0.66% of their portfolio NEW YORK, NY 28,20928.2k $1.1m $1.1m 0.66% New
42 Cedar Wealth Management, LLC 0.27% of their portfolio LA JOLLA, CA 26,87826.9k $1.0m $1.0m 0.27% New
43 Feynman Point Asset Management LLC 1.89% of their portfolio NEW YORK, NY 26,70026.7k $1.0m $1.0m 1.89% New
44 Fund 1 Investments, LLC 0.18% of their portfolio RINCON, PR 25,89825.9k $1.0m $1.0m 0.18% New
45 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 23,91523.9k $928.1k $928.1k 0.00% New
46 Alyeska Investment Group, L.P. 0.00% of their portfolio CHICAGO, IL 19,70719.7k $764.8k $764.8k 0.00% New
47 Diametric Capital, LP 0.07% of their portfolio BOSTON, MA 17,50017.5k $679.2k $679.2k 0.07% New
48 SIMPLEX TRADING, LLC 0.02% of their portfolio CHICAGO, IL 15,18315.2k $589.3k $589.3k 0.02% New
49 Panoramic Capital, LLC 0.25% of their portfolio LARKSPUR, CA 15,00015.0k $582.1k $582.1k 0.25% New
50 Concentric Capital Strategies, LP 0.04% of their portfolio Stamford, CT 14,68614.7k $570.0k $570.0k 0.04% New
51 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 13,15013.2k $510.0k $510.0k 0.00% New
52 Kazazian Asset Management, LLC 0.45% of their portfolio FORT LAUDERDALE, FL 13,04413.0k $506.2k $506.2k 0.45% New
53 WINTON GROUP Ltd 0.01% of their portfolio LONDON, X0 10,60010.6k $411.4k $411.4k 0.01% New
54 OPPENHEIMER & CO INC 0.00% of their portfolio NEW YORK, NY 8,5008.5k $329.9k $329.9k 0.00% New
55 Harbour Capital Advisors, LLC 0.04% of their portfolio TYSONS CORNER, VA 7,8007.8k $221.8k $221.8k 0.04% New
56 Curi Capital, LLC 0.00% of their portfolio CHICAGO, IL 7,6507.7k $296.9k $296.9k 0.00% New
57 PRELUDE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 6,7646.8k $262.5k $262.5k 0.02% New
58 MANGROVE PARTNERS IM, LLC 0.02% of their portfolio Greenwich, CT 6,1026.1k $236.8k $236.8k 0.02% New
59 Clearline Capital LP 0.01% of their portfolio NEW YORK, NY 5,9606.0k $231.3k $231.3k 0.01% New
60 Accel Wealth Management 0.05% of their portfolio WAVERLY, IA 5,7065.7k $221.4k $221.4k 0.05% New
61 BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio NEW YORK, NY 5,2005.2k $201.8k $201.8k 0.00% New
62 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 5,1655.2k $200.5k $200.5k 0.00% New
63 Activest Wealth Management 0.02% of their portfolio AVENTURA, FL 2,1002.1k $81.5k $81.5k 0.02% New
64 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 2,0062.0k $77.9k $77.9k 0.00% New
65 Global Retirement Partners, LLC 0.00% of their portfolio San Rafael, CA 2,0002.0k $77.6k $77.6k 0.00% First filing
66 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1,8001.8k $69.9k $69.9k 0.00% New
67 Rockefeller Capital Management L.P. 0.00% of their portfolio NEW YORK, NY 1,6901.7k $65.6k $65.6k 0.00% New
68 Larson Financial Group LLC 0.00% of their portfolio ST LOUIS, MO 1,4001.4k $54.3k $54.3k 0.00% New
69 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 1,2611.3k $48.9k $48.9k 0.00% New
70 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 1,1501.1k $44.6k $44.6k 0.00% New
71 Persistent Asset Partners Ltd 0.01% of their portfolio HONG KONG, K3 1,0791.1k $41.9k $41.9k 0.01% New
72 HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 1,0001.0k $38.8k $38.8k 0.00% New
73 Game Plan Financial Advisors, LLC 0.01% of their portfolio WESTLAKE, OH 439439 $17.0k $17.0k 0.01% New
74 Global Trust Asset Management, LLC 0.00% of their portfolio PALM BEACH GARDENS, FL 200200 $7.8k $7.8k 0.00% New
75 MCF Advisors LLC 0.00% of their portfolio LEXINGTON, KY 144144 $5.6k $5.6k 0.00% New
76 WOLVERINE ASSET MANAGEMENT LLC 0.00% of their portfolio CHICAGO, IL 6060 $2.3k $2.3k 0.00% New
77 FNY Investment Advisers, LLC 0.00% of their portfolio NEW YORK, NY 5050 $1.0k $1.0k 0.00% New
78 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 3030 $1.2k $1.2k 0.00% New
79 Friedenthal Financial 0.00% of their portfolio MARLTON, NJ 11 $30 $30 0.00% New