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Accelerant Holdings (ARX) institutional ownership

Latest close $13.58 Jul 20, 2026
Market cap$3.1B 52-week range SectorFinancial Services
Funds holding · Q1 2026
110
reported ARX position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net bought $43M
63 buyers · 47 sellers

Accelerant Holdings (ARX) price and institutional activity

Dates

Q1 2026

$181M bought by 63 investors
Marshall Wace, LLP$24MVanguard$24M +61 more
$138M sold by 47 investors
Balyasny Asset Management L.P.-$35MDeer Park Road Corp-$27M +45 more
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Bought Sold Totals per quarter; hover a bar for the names.

Accelerant Holdings (ARX) institutional activity · 110

Investor Type Est. change Change Δ Own Date
Balyasny Asset Management L.P. · Exited −$35M
Change −2.7M Δ Own −100.0% Date Q1 2026
Balyasny Asset Management L.P. Exited· Q1 2026 −$35M −2.7M −100.0% Q1 2026
Deer Park Road Corp · Exited −$27M
Change −2.1M Δ Own −100.0% Date Q1 2026
Deer Park Road Corp Exited· Q1 2026 −$27M −2.1M −100.0% Q1 2026
Marshall Wace, LLP · Added +$24M
Change +1.9M Date Q1 2026
Marshall Wace, LLP Added· Q1 2026 +$24M +1.9M Q1 2026
Vanguard · Added +$24M
Change +1.9M Date Q1 2026
Vanguard Added· Q1 2026 +$24M +1.9M Q1 2026
Cresset Asset Management, LLC · New +$23M
Change +1.8M Date Q1 2026
Cresset Asset Management, LLC New· Q1 2026 +$23M +1.8M Q1 2026
American Century Companies Inc · Added +$21M
Change +1.7M Date Q1 2026
American Century Companies Inc Added· Q1 2026 +$21M +1.7M Q1 2026
Grandeur Peak Global Advisors, LLC · Reduced −$20M
Change −1.6M Date Q1 2026
Grandeur Peak Global Advisors, LLC Reduced· Q1 2026 −$20M −1.6M Q1 2026
Qube Research & Technologies Ltd · New +$12M
Change +931K Date Q1 2026
Qube Research & Technologies Ltd New· Q1 2026 +$12M +931K Q1 2026
Jane Street Group, LLC · New +$11M
Change +861K Date Q1 2026
Jane Street Group, LLC New· Q1 2026 +$11M +861K Q1 2026
Keenan Capital, LLC · Added +$11M
Change +853K Date Q1 2026
Keenan Capital, LLC Added· Q1 2026 +$11M +853K Q1 2026
Susquehanna International Group, LLP · New +$8.9M
Change +708K Date Q1 2026
Susquehanna International Group, LLP New· Q1 2026 +$8.9M +708K Q1 2026
Norges · Exited −$8.4M
Change −665K Δ Own −100.0% Date Q1 2026
Norges Exited· Q1 2026 −$8.4M −665K −100.0% Q1 2026
Capital World Investors · Reduced −$7.8M
Change −615K Date Q1 2026
Capital World Investors Reduced· Q1 2026 −$7.8M −615K Q1 2026
Azora Capital LP · Reduced −$5.8M
Change −459K Date Q1 2026
Azora Capital LP Reduced· Q1 2026 −$5.8M −459K Q1 2026
Fred Alger Management, LLC · Exited −$5.6M
Change −440K Δ Own −100.0% Date Q1 2026
Fred Alger Management, LLC Exited· Q1 2026 −$5.6M −440K −100.0% Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 110

Famous investor activity in Accelerant Holdings (ARX)

Accelerant Holdings (ARX) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Radke Jeffrey L. · Director Sell −$1.1M
Price $13.51 Qty −80K Owned 27.8M ΔOwn −0.3% Trade date Jul 20, 2026 Filed date Jul 20, 2026
Radke Jeffrey L. Director Sell $13.51 −80K −$1.1M 27.8M −0.3% Jul 20, 2026 Jul 20, 2026
Radke Jeffrey L. · Director Sell −$211K
Price $14.30 Qty −15K Owned 27.9M ΔOwn −0.1% Trade date Jul 17, 2026 Filed date Jul 20, 2026
Radke Jeffrey L. Director Sell $14.30 −15K −$211K 27.9M −0.1% Jul 17, 2026 Jul 20, 2026
Oneill Francis James · Officer Sell −$1.1M
Price $12.71 Qty −83K Owned 6.7M ΔOwn −1.2% Trade date Jul 15, 2026 Filed date Jul 16, 2026
Oneill Francis James Officer Sell $12.71 −83K −$1.1M 6.7M −1.2% Jul 15, 2026 Jul 16, 2026
Oneill Francis James · Officer Sell −$1.1M
Price $12.84 Qty −83K Owned 6.8M ΔOwn −1.2% Trade date Jul 14, 2026 Filed date Jul 16, 2026
Oneill Francis James Officer Sell $12.84 −83K −$1.1M 6.8M −1.2% Jul 14, 2026 Jul 16, 2026
Radke Jeffrey L. · Director Sell −$1.1M
Price $13.18 Qty −80K Owned 27.9M ΔOwn −0.3% Trade date Jul 13, 2026 Filed date Jul 14, 2026
Radke Jeffrey L. Director Sell $13.18 −80K −$1.1M 27.9M −0.3% Jul 13, 2026 Jul 14, 2026
Radke Jeffrey L. · Director Sell −$1.1M
Price $13.33 Qty −80K Owned 28.0M ΔOwn −0.3% Trade date Jul 6, 2026 Filed date Jul 7, 2026
Radke Jeffrey L. Director Sell $13.33 −80K −$1.1M 28.0M −0.3% Jul 6, 2026 Jul 7, 2026
Radke Jeffrey L. · Director Sell −$1.0M
Price $12.87 Qty −80K Owned 28.1M ΔOwn −0.3% Trade date Jun 29, 2026 Filed date Jun 30, 2026
Radke Jeffrey L. Director Sell $12.87 −80K −$1.0M 28.1M −0.3% Jun 29, 2026 Jun 30, 2026
Oneill Francis James · Officer Sell −$969K
Price $13.18 Qty −74K Owned 6.9M ΔOwn −1.1% Trade date Jun 26, 2026 Filed date Jun 29, 2026
Oneill Francis James Officer Sell $13.18 −74K −$969K 6.9M −1.1% Jun 26, 2026 Jun 29, 2026
Oneill Francis James · Officer Sell −$960K
Price $13.06 Qty −74K Owned 7.0M ΔOwn −1.0% Trade date Jun 25, 2026 Filed date Jun 29, 2026
Oneill Francis James Officer Sell $13.06 −74K −$960K 7.0M −1.0% Jun 25, 2026 Jun 29, 2026
Hasley Nancy · Director Sell −$459K
Price $13.11 Qty −35K Owned 1.4M ΔOwn −2.5% Trade date Jun 23, 2026 Filed date Jun 25, 2026
Hasley Nancy Director Sell $13.11 −35K −$459K 1.4M −2.5% Jun 23, 2026 Jun 25, 2026
Radke Jeffrey L. · Director Sell −$1.0M
Price $13.11 Qty −80K Owned 28.2M ΔOwn −0.3% Trade date Jun 23, 2026 Filed date Jun 25, 2026
Radke Jeffrey L. Director Sell $13.11 −80K −$1.0M 28.2M −0.3% Jun 23, 2026 Jun 25, 2026
Oneill Francis James · Officer Sell −$1.0M
Price $13.11 Qty −76K Owned 7.1M ΔOwn −1.1% Trade date Jun 23, 2026 Filed date Jun 24, 2026
Oneill Francis James Officer Sell $13.11 −76K −$1.0M 7.1M −1.1% Jun 23, 2026 Jun 24, 2026
Oneill Francis James · Officer Sell −$932K
Price $13.21 Qty −71K Owned 7.1M ΔOwn −1.0% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Oneill Francis James Officer Sell $13.21 −71K −$932K 7.1M −1.0% Jun 22, 2026 Jun 24, 2026
Sternberg Matthew David · Officer Grant (A) 279K
Owned 618K Trade date May 13, 2026 Filed date May 15, 2026
Sternberg Matthew David Officer Grant (A) 279K 618K May 13, 2026 May 15, 2026
Wainwright Simon · Director Grant (A) 23K
Owned 23K Trade date May 13, 2026 Filed date May 15, 2026
Wainwright Simon Director Grant (A) 23K 23K May 13, 2026 May 15, 2026
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Accelerant Holdings (ARX) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Capital World Investors 5.2M
% of shares outstanding 4.4% Filing date May 14, 2026
Capital World Investors 5.2M 4.4% May 14, 2026
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Accelerant Holdings (ARX) ownership FAQ

Who owns ARX?

110 reporting institutions disclosed ARX position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.