Vault-13

ACCELERANT HOLDINGS ARX

CL A · Common Stock · CUSIP G00894108

107 institutional holders +9 vs Q4 2025
55,873,38955.9m shares reported held*
$759.0mreported value*
27 new 36 added 23 reduced 22 sold out net bought ≈ $50.6m (+3.7m shares)

* 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 ≈ $13.58. Options: 3 managers hold calls ($726.8k notional), 0 hold puts (—).

Trends to Q1 2026

Institutional holders

Managers reporting a position, each quarter

050100150Q3 25: 88Q4 25: 98Q1 26: 107107Q3 25Q4 25Q1 26
Numbers
QuarterHolders
Q3 202588
Q4 202598
Q1 2026107

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q4 25: 59 bought or addedQ4 25: 52 cut or sold outQ4 25Q1 26: 63 bought or addedQ1 26: 45 cut or sold outQ1 26
Numbers
QuarterBought or addedCut or sold out
Q4 20255952
Q1 20266345

Calls vs puts

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

CallsPuts
$0$500k$1m$1.5m$2mQ2 25 calls: $0Q2 25 puts: $0Q2 25P/C —Q3 25 calls: $358.8kQ3 25 puts: $1.8mQ3 25P/C 5.00Q4 25 calls: $958.1kQ4 25 puts: $4.9kQ4 25P/C 0.01Q1 26 calls: $726.8kQ1 26 puts: $0Q1 26P/C 0.00
Numbers
QuarterCallsPutsP/C
Q2 2025$0$0—
Q3 2025$358.8k$1.8m5.00
Q4 2025$958.1k$4.9k0.01
Q1 2026$726.8k$00.00

Biggest buyers

MARSHALL WACE, LLP Added +1,926,005+1.9m
Cresset Asset Management, LLC New +1,839,620+1.8m
AMERICAN CENTURY COMPANIES INC Added +1,660,054+1.7m
Qube Research & Technologies Ltd New +930,942+930.9k
JANE STREET GROUP, LLC New +860,697+860.7k
Keenan Capital, LLC Added +852,943+852.9k
SUSQUEHANNA INTERNATIONAL GROUP, LLP New +708,046+708.0k
CITADEL ADVISORS LLC Added +428,754+428.8k
G2 Investment Partners Management LLC Added +279,470+279.5k
BNP PARIBAS FINANCIAL MARKETS Added +269,466+269.5k

Biggest sellers

Balyasny Asset Management L.P. Sold out -2,733,595-2.7m
Grandeur Peak Global Advisors, LLC Reduced -1,581,449-1.6m
Capital World Investors Reduced -614,890-614.9k
Azora Capital LP Reduced -458,883-458.9k
FRED ALGER MANAGEMENT, LLC Sold out -439,698-439.7k
T. Rowe Price Investment Management, Inc. Reduced -371,950-371.9k
GOLDMAN SACHS GROUP INC Reduced -260,957-261.0k
TEACHER RETIREMENT SYSTEM OF TEXAS Sold out -176,043-176.0k
Counterpoint Mutual Funds LLC Sold out -175,967-176.0k
Lykos Global Management, LP Sold out -175,000-175.0k

Biggest calls

CITADEL ADVISORS LLC Reduced $451.6k33.8k shares
GROUP ONE TRADING LLC Added $231.1k17.3k shares
SIMPLEX TRADING, LLC Added $44.1k3.3k shares

Biggest puts

None

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
ACP Accelerant Holdings, L.P. 13G · exempt (held before listing) new · filed 2025-11-14 44.2% new 90.9m≈ $1.1bn 2025-11-14
RADKE JEFFREY L 13G · exempt (held before listing) new · filed 2025-11-14 29.9% new 36.8m≈ $430.7m 2025-11-14
Lee-Smith Christopher 13G · exempt (held before listing) new · filed 2025-11-14 17.4% new 20.4m≈ $238.9m 2025-11-14
ONeill Francis James 13G · exempt (held before listing) new · filed 2025-11-14 7.0% new 8.1m≈ $94.7m 2025-11-14
GLAZER CAPITAL, LLC 13G · passive investor new · filed 2026-09-30 5.0% new 6.0m≈ $70.0m 2026-09-30

Fell to 5% or below in the last year: Capital World Investors (4.4%, 2026-05-14)

Insider purchases and sales in Q1 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
10010Q2 24: 0 buyingQ2 24: 0 sellingQ3 24: 0 buyingQ3 24: 0 sellingQ3 24Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 1 buyingQ3 25: 1 sellingQ3 25Q4 25: 6 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 1 sellingQ1 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20240—0——
Q3 20240—0——
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20251$10.5k1$243.5m—
Q4 20256$1.9m0——
Q1 20260—1$638.5k$638.5k
DateInsiderTradeSharesPrice ValueTheir holding
2026-03-23 Green Jay Michael Chief Financial Officer Sold plan 50,000 $12.77 $638.5k50.0k 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, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 SECURITY BENEFIT LIFE INSURANCE CO /KS/ 41.18% of their portfolio TOPEKA, KS 5,866,2575.9m $78.4m $78.4m 41.18% Unchanged
2 Capital World Investors 0.01% of their portfolio LOS ANGELES, CA 5,152,7415.2m $68.8m $68.8m 0.01% Reduced -614.9k -614,890
3 Keenan Capital, LLC 11.26% of their portfolio BURLINGAME, CA 3,992,9234.0m $53.3m $53.3m 11.26% Added +852.9k +852,943
4 GILDER GAGNON HOWE & CO LLC 0.60% of their portfolio New York, NY 3,743,3643.7m $50.0m $50.0m 0.60% Added +40.3k +40,286
5 AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio KANSAS CITY, MO 3,188,5053.2m $42.6m $42.6m 0.02% Added +1.7m +1,660,054
6 BARINGS LLC 0.74% of their portfolio CHARLOTTE, NC 3,128,8673.1m $46.1m $46.1m 0.74% Unchanged
7 ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio NASHVILLE, TN 2,800,1882.8m $45.8m $45.8m 0.01% Reduced -46.3k -46,280
8 MARSHALL WACE, LLP 0.03% of their portfolio LONDON, X0 2,274,1522.3m $30.4m $30.4m 0.03% Added +1.9m +1,926,005
9 VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 2,113,5652.1m $28.2m $28.2m 0.00% First filing
10 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 2,020,3682.0m $26.9m $26.9m 0.00% Added +67.4k +67,372
11 Azora Capital LP 1.74% of their portfolio MIAMI, FL 1,980,2112.0m $26.5m $26.5m 1.74% Reduced -458.9k -458,883
12 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 1,938,9381.9m $25.9m $25.9m 0.00% First filing
13 Cresset Asset Management, LLC 0.11% of their portfolio Chicago, IL 1,839,6201.8m $24.6m $24.6m 0.11% New
14 FMR LLC 0.00% of their portfolio BOSTON, MA 1,812,2071.8m $24.2m $24.2m 0.00% Added +24.1k +24,072
15 ArrowMark Colorado Holdings LLC 0.55% of their portfolio Denver, CO 1,548,2241.5m $20.7m $20.7m 0.55% Reduced -95.8k -95,789
16 BAMCO INC /NY/ 0.05% of their portfolio NEW YORK, NY 1,208,7941.2m $16.1m $16.1m 0.05% Reduced -320 -320
17 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 1,144,2061.1m $15.3m $15.3m 0.01% Added +428.8k +428,754
18 T. Rowe Price Investment Management, Inc. 0.01% of their portfolio BALTIMORE, MD 975,936975.9k $13.0m $13.0m 0.01% Reduced -371.9k -371,950
19 Qube Research & Technologies Ltd 0.02% of their portfolio LONDON, X0 930,942930.9k $12.4m $12.4m 0.02% New
20 JANE STREET GROUP, LLC 0.01% of their portfolio NEW YORK, NY 860,697860.7k $11.5m $11.5m 0.01% New
21 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio BALA CYNWYD, PA 708,046708.0k $9.5m $9.5m 0.01% New
22 UBS Group AG 0.00% of their portfolio ZURICH, V8 685,647685.6k $9.2m $9.2m 0.00% Added +150.0k +150,010
23 Militia Capital Management LLC 0.45% of their portfolio AUSTIN, TX 450,000450.0k $6.0m $6.0m 0.45% First filing
24 G2 Investment Partners Management LLC 1.23% of their portfolio New York, NY 372,811372.8k $5.0m $5.0m 1.23% Added +279.5k +279,470
25 Woodline Partners LP 0.02% of their portfolio San Francisco, CA 367,157367.2k $4.9m $4.9m 0.02% Added +169.8k +169,845
26 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 305,244305.2k $4.1m $4.1m 0.00% Added +269.5k +269,466
27 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 287,175287.2k $3.8m $3.8m 0.00% Added +178.9k +178,945
28 RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio NEW YORK, NY 276,600276.6k $3.7m $3.7m 0.01% Added +203.9k +203,900
29 XTX Topco Ltd 0.06% of their portfolio LONDON, X0 237,669237.7k $3.2m $3.2m 0.06% Added +131.4k +131,421
30 Squarepoint Ops LLC 0.01% of their portfolio NEW YORK, NY 212,791212.8k $2.8m $2.8m 0.01% Added +13.7k +13,721
31 Owls Nest Partners IA, LLC 0.98% of their portfolio CHADDS FORD, PA 209,707209.7k $2.8m $2.8m 0.98% New
32 SEVEN GRAND MANAGERS, LLC 0.18% of their portfolio BRONXVILLE, NY 200,000200.0k $2.7m $2.7m 0.18% Unchanged
33 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 180,186180.2k $2.4m $2.4m 0.00% Reduced -155.6k -155,553
34 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 166,692166.7k $2.2m $2.2m 0.00% New
35 BlackRock, Inc. 0.00% of their portfolio New York, NY 165,564165.6k $2.2m $2.2m 0.00% Reduced -82.1k -82,092
36 CANNELL CAPITAL LLC 1.35% of their portfolio ALTA, WY 156,149156.1k $2.1m $2.1m 1.35% New
37 Trexquant Investment LP 0.01% of their portfolio STAMFORD, CT 149,119149.1k $2.0m $2.0m 0.01% New
38 Robertson Opportunity Capital, LLC 0.69% of their portfolio DALLAS, TX 135,012135.0k $1.8m $1.8m 0.69% New
39 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 125,068125.1k $1.7m $1.7m 0.00% Reduced -56.6k -56,579
40 Schonfeld Strategic Advisors LLC 0.01% of their portfolio NEW YORK, NY 113,795113.8k $1.5m $1.5m 0.01% Added +56.6k +56,584
41 Burkehill Global Management, LP 0.07% of their portfolio NEW YORK, NY 100,000100.0k $1.3m $1.3m 0.07% Unchanged
42 Jain Global LLC 0.01% of their portfolio NEW YORK, NY 86,41886.4k $1.2m $1.2m 0.01% Added +36.2k +36,184
43 Lighthouse Investment Partners, LLC 0.04% of their portfolio Palm Beach Gardens, FL 85,40685.4k $1.1m $1.1m 0.04% Reduced -113.4k -113,444
44 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 82,68082.7k $1.1m $1.1m 0.00% Added +23.3k +23,266
45 BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 78,67778.7k $1.1m $1.1m 0.02% Added +52.7k +52,677
46 Swiss National Bank 0.00% of their portfolio ZURICH, V8 77,90077.9k $1.0m $1.0m 0.00% Unchanged
47 TIGER GLOBAL MANAGEMENT LLC 0.00% of their portfolio New York, NY 75,00075.0k $1.0m $1.0m 0.00% Unchanged
48 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 73,93573.9k $987.8k $987.8k 0.00% Added +36.0k +36,033
49 SummitTX Capital, L.P. 0.03% of their portfolio FORT WORTH, TX 62,99963.0k $841.7k $841.7k 0.03% Added +6.2k +6,219
50 Hudson Bay Capital Management LP 0.00% of their portfolio STAMFORD, CT 55,27655.3k $738.5k $738.5k 0.00% Added +23.0k +23,026
51 Brevan Howard Capital Management LP 0.01% of their portfolio ST. HELIER, Y9 54,41654.4k $727.0k $727.0k 0.01% New
52 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 53,46353.5k $714.3k $714.3k 0.00% Added +28.2k +28,194
53 Interval Partners, LP 0.02% of their portfolio NEW YORK, NY 49,53449.5k $661.8k $661.8k 0.02% Reduced -119.8k -119,814
54 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 47,96048.0k $640.7k $640.7k 0.00% First filing
55 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 46,69346.7k $623.8k $623.8k 0.00% Added +36.3k +36,318
56 Engineers Gate Manager LP 0.01% of their portfolio NEW YORK, NY 44,01644.0k $588.1k $588.1k 0.01% New
57 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 44,00544.0k $587.9k $587.9k 0.01% New
58 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 41,66941.7k $556.7k $556.7k 0.00% Reduced -261.0k -260,957
59 Grandeur Peak Global Advisors, LLC 0.12% of their portfolio SALT LAKE CITY, UT 39,57339.6k $528.7k $528.7k 0.12% Reduced -1.6m -1,581,449
60 Jefferies Financial Group Inc. 0.01% of their portfolio NEW YORK, NY 39,17839.2k $523.4k $523.4k 0.01% Reduced -5.8k -5,802
61 Aquatic Capital Management LLC 0.01% of their portfolio CHICAGO, IL 37,43537.4k $500.1k $500.1k 0.01% New
62 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 37,30637.3k $498.4k $498.4k 0.00% Added +3.8k +3,752
63 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 36,55636.6k $488.4k $488.4k 0.00% New
64 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 34,97235.0k $467.2k $467.2k 0.00% Unchanged
65 Catalyst Funds Management Pty Ltd 0.08% of their portfolio SYDNEY NSW, C3 34,90034.9k $466.3k $466.3k 0.08% New
66 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 32,30032.3k $431.5k $431.5k 0.00% Unchanged
67 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 28,85028.9k $385.4k $385.4k 0.00% New
68 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 28,00028.0k $374.1k $374.1k 0.00% Added +11.4k +11,437
69 VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio London, EC4N 8AF, X0 26,85626.9k $358.8k $358.8k 0.00% First filing
70 LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 0.02% of their portfolio Englewood, NJ 26,76826.8k $357.6k $357.6k 0.02% Added +13.9k +13,880
71 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 23,50023.5k $314.5k $314.5k 0.00% Unchanged
72 Centiva Capital, LP 0.01% of their portfolio New York, NY 20,44320.4k $273.1k $273.1k 0.01% Reduced -107.2k -107,162
73 Legal & General Group Plc 0.00% of their portfolio London, X0 19,16719.2k $256.1k $256.1k 0.00% Reduced -11.1k -11,104
74 Entropy Technologies, LP 0.01% of their portfolio NEW YORK, NY 17,90917.9k $239.3k $239.3k 0.01% New
75 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 16,41916.4k $219.4k $219.4k 0.00% Added +1.6k +1,600
76 NATIXIS ADVISORS, LLC 0.00% of their portfolio Boston, MA 15,47015.5k $207.0k $207.0k 0.00% Reduced -7.9k -7,877
77 Man Group plc 0.00% of their portfolio LONDON, X0 14,14414.1k $189.0k $189.0k 0.00% New
78 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 14,11814.1k $183.7k $183.7k 0.00% Added +14.1k +14,100
79 WINTON GROUP Ltd 0.01% of their portfolio LONDON, X0 13,80013.8k $184.4k $184.4k 0.01% New
80 Graham Capital Management, L.P. 0.01% of their portfolio ROWAYTON, CT 13,62213.6k $182.0k $182.0k 0.01% New
81 LMR Partners LLP 0.00% of their portfolio LONDON, X0 11,67211.7k $155.9k $155.9k 0.00% New
82 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 11,39211.4k $152.2k $152.2k 0.00% Added +11.3k +11,299
83 ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio PHOENIX, AZ 10,83810.8k $144.8k $144.8k 0.00% Reduced -17 -17
84 Vanguard Investments Australia, Ltd. 0.00% of their portfolio Victoria, C3 10,67710.7k $142.6k $142.6k 0.00% First filing
85 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 10,22910.2k $136.7k $136.7k 0.00% New
86 Arcus Capital Partners, LLC 0.05% of their portfolio ATLANTA, GA 10,10010.1k $134.9k $134.9k 0.05% New
87 WESBANCO BANK INC 0.00% of their portfolio WHEELING, WV 10,00010.0k $133.6k $133.6k 0.00% Unchanged
88 KLP KAPITALFORVALTNING AS 0.00% of their portfolio OSLO, Q8 8,5008.5k $113.6k $113.6k 0.00% Unchanged
89 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 7,7297.7k $103.0k $103.0k 0.00% Added +2.6k +2,585
90 CWM, LLC 0.00% of their portfolio OMAHA, NE 6,6666.7k $89.1k $89.1k 0.00% Unchanged
91 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 6,1576.2k $82.3k $82.3k 0.00% Added +2.6k +2,611
92 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 3,8333.8k $51.2k $51.2k 0.00% Reduced -1.2k -1,247
93 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 3,4983.5k $46.7k $46.7k 0.00% Added +3.1k +3,100
94 State of Wyoming 0.00% of their portfolio CHEYENNE, WY 2,0752.1k $27.7k $27.7k 0.00% New
95 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 750750 $10.0k $10.0k 0.00% New
96 FIRST HORIZON CORP 0.00% of their portfolio MEMPHIS, TN 677677 $9.0k $9.0k 0.00% Added +32 +32
97 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 666666 $8.9k $8.9k 0.00% Unchanged
98 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 558558 $7.5k $7.5k 0.00% Reduced -1.0k -1,006
99 Rachor Investment Advisory Services, LLC 0.00% of their portfolio Linden, MI 209209 $2.8k $2.8k 0.00% Added +74 +74
100 SJS Investment Consulting Inc. 0.00% of their portfolio SYLVANIA, OH 164164 $2.2k $2.2k 0.00% New