Vault-13

ACCELERANT HOLDINGS ARX

CL A · Common Stock · CUSIP G00894108

98 institutional holders +10 vs Q3 2025
50,442,60450.4m shares reported held*
$815.5mreported value*
35 new 24 added 28 reduced 24 sold out net sold ≈ $12.7m (-779.8k 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 ≈ $16.17. Options: 3 managers hold calls ($958.1k notional), 1 hold puts ($4.9k).

Trends to Q4 2025

Institutional holders

Managers reporting a position, each quarter

050100Q3 25: 88Q4 25: 9898Q3 25Q4 25
Numbers
QuarterHolders
Q3 202588
Q4 202598

Calls vs puts

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

CallsPuts
$0$500k$1m$1.5m$2mQ1 25 calls: $0Q1 25 puts: $0Q1 25P/C —Q2 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 0.01
Numbers
QuarterCallsPutsP/C
Q1 2025$0$0—
Q2 2025$0$0—
Q3 2025$358.8k$1.8m5.00
Q4 2025$958.1k$4.9k0.01

Biggest buyers

Keenan Capital, LLC New +3,139,980+3.1m
Azora Capital LP Added +1,811,976+1.8m
FMR LLC Added +1,229,490+1.2m
Balyasny Asset Management L.P. Added +714,811+714.8k
Grandeur Peak Global Advisors, LLC Added +675,093+675.1k
AMERICAN CENTURY COMPANIES INC Added +615,626+615.6k
ArrowMark Colorado Holdings LLC Added +612,409+612.4k
UBS Group AG Added +411,612+411.6k
MARSHALL WACE, LLP Added +242,932+242.9k
GOLDMAN SACHS GROUP INC Added +208,279+208.3k

Biggest sellers

BlackRock, Inc. Reduced -2,059,045-2.1m
JPMORGAN CHASE & CO Reduced -1,268,730-1.3m
Driehaus Capital Management LLC Sold out -1,011,940-1.0m
T. Rowe Price Investment Management, Inc. Reduced -1,007,915-1.0m
MILLENNIUM MANAGEMENT LLC Reduced -690,433-690.4k
NEUBERGER BERMAN GROUP LLC Reduced -586,070-586.1k
JANUS HENDERSON GROUP PLC Reduced -519,784-519.8k
Journey Advisory Group, LLC Sold out -432,526-432.5k
CenterBook Partners LP Sold out -382,645-382.6k
Dragoneer Investment Group, LLC Sold out -336,361-336.4k

Biggest calls

CITADEL ADVISORS LLC Added $655.6k40.1k shares
GROUP ONE TRADING LLC Added $269.8k16.5k shares
SIMPLEX TRADING, LLC Reduced $32.7k2.0k shares

Biggest puts

GROUP ONE TRADING LLC Reduced $4.9k300 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
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 Q4 2025

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
10010Q1 24: 0 buyingQ1 24: 0 sellingQ2 24: 0 buyingQ2 24: 0 sellingQ2 24Q3 24: 0 buyingQ3 24: 0 sellingQ4 24: 0 buyingQ4 24: 0 sellingQ4 24Q1 25: 0 buyingQ1 25: 0 sellingQ2 25: 0 buyingQ2 25: 0 sellingQ2 25Q3 25: 1 buyingQ3 25: 1 sellingQ4 25: 6 buyingQ4 25: 0 sellingQ4 25
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20240—0——
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——
DateInsiderTradeSharesPrice ValueTheir holding
2025-12-08 Meriwether Karen Sue Director Bought 542 $14.67 $8.0k542 shares +6%
2025-11-19 Lee-Smith Christopher Co-Founder, Head of Distrib., director Bought 14,700 $13.42 $197.3k14.7k shares +<1%
2025-11-19 Gaynor Samuel Director Bought 7,500 $13.44 $100.8k7.5k shares new
2025-11-18 ONeill Francis James Co-Founder, Chief U/W Officer Bought 38,000 $13.34 $506.9k38.0k shares +0%
2025-11-17 Sternberg Matthew David COO, Risk Exchange Bought 5,700 $13.10 $74.7k5.7k shares +4%
2025-11-14 RADKE JEFFREY L Co-Founder, CEO, director · By LLC Bought 74,110 $13.48 $999.0k74.1k shares +<1%

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, Q4 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 SECURITY BENEFIT LIFE INSURANCE CO /KS/ 39.61% of their portfolio TOPEKA, KS 5,866,2575.9m $95.9m $95.9m 39.61% Unchanged
2 Capital World Investors 0.01% of their portfolio LOS ANGELES, CA 5,767,6315.8m $94.3m $94.3m 0.01% Added +14.4k +14,381
3 GILDER GAGNON HOWE & CO LLC 0.64% of their portfolio New York, NY 3,703,0783.7m $60.5m $60.5m 0.64% Reduced -195.2k -195,194
4 Keenan Capital, LLC 9.35% of their portfolio BURLINGAME, CA 3,139,9803.1m $51.3m $51.3m 9.35% New
5 BARINGS LLC 0.77% of their portfolio CHARLOTTE, NC 3,128,8673.1m $41.9m $41.9m 0.77% Unchanged
6 ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio NASHVILLE, TN 2,846,4682.8m $46.5m $46.5m 0.01% Added +57.4k +57,384
7 Balyasny Asset Management L.P. 0.08% of their portfolio Chicago, IL 2,733,5952.7m $44.7m $44.7m 0.08% Added +714.8k +714,811
8 Azora Capital LP 2.51% of their portfolio MIAMI, FL 2,439,0942.4m $39.9m $39.9m 2.51% Added +1.8m +1,811,976
9 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,235,1362.2m $36.5m $36.5m 0.00% Reduced -13.5k -13,471
10 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,952,9962.0m $31.9m $31.9m 0.00% Reduced -1.3m -1,268,730
11 FMR LLC 0.00% of their portfolio BOSTON, MA 1,788,1351.8m $29.2m $29.2m 0.00% Added +1.2m +1,229,490
12 ArrowMark Colorado Holdings LLC 0.59% of their portfolio Denver, CO 1,644,0131.6m $26.9m $26.9m 0.59% Added +612.4k +612,409
13 Grandeur Peak Global Advisors, LLC 3.57% of their portfolio SALT LAKE CITY, UT 1,621,0221.6m $26.5m $26.5m 3.57% Added +675.1k +675,093
14 AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio KANSAS CITY, MO 1,528,4511.5m $25.0m $25.0m 0.01% Added +615.6k +615,626
15 T. Rowe Price Investment Management, Inc. 0.01% of their portfolio BALTIMORE, MD 1,347,8861.3m $22.0m $22.0m 0.01% Reduced -1.0m -1,007,915
16 BAMCO INC /NY/ 0.05% of their portfolio NEW YORK, NY 1,209,1141.2m $19.8m $19.8m 0.05% Reduced -9.2k -9,195
17 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 715,452715.5k $11.7m $11.7m 0.01% Reduced -206.6k -206,635
18 NORGES BANK 0.00% of their portfolio OSLO, Q8 665,076665.1k $10.9m $10.9m 0.00% Not comparable
19 UBS Group AG 0.00% of their portfolio ZURICH, V8 535,637535.6k $8.8m $8.8m 0.00% Added +411.6k +411,612
20 FRED ALGER MANAGEMENT, LLC 0.03% of their portfolio NEW YORK, NY 439,698439.7k $7.2m $7.2m 0.03% Reduced -81.2k -81,217
21 MARSHALL WACE, LLP 0.01% of their portfolio LONDON, X0 348,147348.1k $5.7m $5.7m 0.01% Added +242.9k +242,932
22 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 335,739335.7k $5.5m $5.5m 0.00% Reduced -174.6k -174,641
23 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 302,626302.6k $4.9m $4.9m 0.00% Added +208.3k +208,279
24 BlackRock, Inc. 0.00% of their portfolio New York, NY 247,656247.7k $4.0m $4.0m 0.00% Reduced -2.1m -2,059,045
25 SEVEN GRAND MANAGERS, LLC 0.25% of their portfolio BRONXVILLE, NY 200,000200.0k $3.3m $3.3m 0.25% Unchanged
26 Squarepoint Ops LLC 0.01% of their portfolio NEW YORK, NY 199,070199.1k $3.3m $3.3m 0.01% Reduced -30.8k -30,825
27 Lighthouse Investment Partners, LLC 0.11% of their portfolio Palm Beach Gardens, FL 198,850198.8k $3.3m $3.3m 0.11% Added +26.5k +26,539
28 Woodline Partners LP 0.01% of their portfolio San Francisco, CA 197,312197.3k $3.2m $3.2m 0.01% Added +51.9k +51,899
29 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 181,647181.6k $3.0m $3.0m 0.00% Reduced -690.4k -690,433
30 TEACHER RETIREMENT SYSTEM OF TEXAS 0.01% of their portfolio AUSTIN, TX 176,043176.0k $2.9m $2.9m 0.01% Added +1.0k +1,043
31 Counterpoint Mutual Funds LLC 0.21% of their portfolio San Diego, CA 175,967176.0k $2.9m $2.9m 0.21% New
32 Lykos Global Management, LP 2.02% of their portfolio STAMFORD, CT 175,000175.0k $2.9m $2.9m 2.02% First filing
33 Interval Partners, LP 0.06% of their portfolio NEW YORK, NY 169,348169.3k $2.8m $2.8m 0.06% Reduced -47.7k -47,662
34 NEUBERGER BERMAN GROUP LLC 0.00% of their portfolio NEW YORK, NY 160,047160.0k $2.6m $2.6m 0.00% Reduced -586.1k -586,070
35 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.00% of their portfolio TORONTO, A6 150,000150.0k $2.5m $2.5m 0.00% Unchanged
36 Centiva Capital, LP 0.13% of their portfolio New York, NY 127,605127.6k $2.1m $2.1m 0.13% Reduced -23.4k -23,428
37 Walleye Capital LLC 0.01% of their portfolio NEW YORK, NY 125,880125.9k $2.1m $2.1m 0.01% Reduced -173.9k -173,920
38 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 108,230108.2k $1.8m $1.8m 0.00% Added +18.1k +18,131
39 XTX Topco Ltd 0.05% of their portfolio LONDON, X0 106,248106.2k $1.7m $1.7m 0.05% Added +42.4k +42,383
40 Ghisallo Capital Management LLC 0.07% of their portfolio BOSTON, MA 100,000100.0k $1.6m $1.6m 0.07% Reduced -325.0k -325,000
41 Burkehill Global Management, LP 0.11% of their portfolio NEW YORK, NY 100,000100.0k $1.6m $1.6m 0.11% Unchanged
42 G2 Investment Partners Management LLC 0.36% of their portfolio New York, NY 93,34193.3k $1.5m $1.5m 0.36% New
43 Swiss National Bank 0.00% of their portfolio ZURICH, V8 77,90077.9k $1.3m $1.3m 0.00% New
44 TIGER GLOBAL MANAGEMENT LLC 0.00% of their portfolio New York, NY 75,00075.0k $1.2m $1.2m 0.00% Unchanged
45 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 72,70072.7k $1.2m $1.2m 0.00% New
46 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 59,41459.4k $971.4k $971.4k 0.00% New
47 Yorktown Management & Research Co Inc 0.78% of their portfolio Forest, VA 59,30059.3k $969.6k $969.6k 0.78% New
48 Schonfeld Strategic Advisors LLC 0.00% of their portfolio NEW YORK, NY 57,21157.2k $935.4k $935.4k 0.00% Reduced -99.5k -99,451
49 SummitTX Capital, L.P. 0.03% of their portfolio FORT WORTH, TX 56,78056.8k $928.4k $928.4k 0.03% Added +24.9k +24,860
50 Jain Global LLC 0.01% of their portfolio NEW YORK, NY 50,23450.2k $821.3k $821.3k 0.01% Reduced -149.8k -149,766
51 Jefferies Financial Group Inc. 0.01% of their portfolio NEW YORK, NY 44,98045.0k $735.4k $735.4k 0.01% Added +35.0k +34,980
52 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 37,90237.9k $619.7k $619.7k 0.00% Added +8.0k +7,972
53 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 35,77835.8k $585.0k $585.0k 0.00% New
54 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 34,97235.0k $571.8k $571.8k 0.00% New
55 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 34,69434.7k $567.2k $567.2k 0.00% Reduced -121.8k -121,777
56 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 33,55433.6k $548.6k $548.6k 0.00% New
57 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 32,30032.3k $528.1k $528.1k 0.00% New
58 Hudson Bay Capital Management LP 0.00% of their portfolio STAMFORD, CT 32,25032.2k $527.3k $527.3k 0.00% Reduced -52.0k -52,048
59 Legal & General Group Plc 0.00% of their portfolio London, X0 30,27130.3k $494.9k $494.9k 0.00% Added +20.3k +20,271
60 BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 26,00026.0k $425.1k $425.1k 0.01% New
61 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 25,26925.3k $413.1k $413.1k 0.00% New
62 PharVision Advisers, LLC 0.20% of their portfolio BOCA RATON, FL 23,83923.8k $389.8k $389.8k 0.20% Added +7.6k +7,566
63 GSA CAPITAL PARTNERS LLP 0.03% of their portfolio LONDON, X0 23,51823.5k $385.0k $385.0k 0.03% New
64 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 23,50023.5k $384.1k $384.1k 0.00% Reduced -519.8k -519,784
65 NATIXIS ADVISORS, LLC 0.00% of their portfolio Boston, MA 23,34723.3k $382.0k $382.0k 0.00% New
66 Crestwood Capital Management, L.P. 0.21% of their portfolio NEW YORK, NY 20,00020.0k $327.0k $327.0k 0.21% Unchanged
67 FJ Capital Management LLC 0.03% of their portfolio MCLEAN, VA 17,97318.0k $293.9k $293.9k 0.03% New
68 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 16,56316.6k $270.8k $270.8k 0.00% Reduced -54.2k -54,196
69 Quantbot Technologies LP 0.01% of their portfolio NEW YORK, NY 16,39816.4k $268.1k $268.1k 0.01% New
70 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 14,81914.8k $242.3k $242.3k 0.00% New
71 LANDSCAPE CAPITAL MANAGEMENT, L.L.C. 0.01% of their portfolio Englewood, NJ 12,88812.9k $210.7k $210.7k 0.01% New
72 ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio PHOENIX, AZ 10,85510.9k $177.5k $177.5k 0.00% New
73 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 10,37510.4k $169.6k $169.6k 0.00% New
74 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 10,29210.3k $168.3k $168.3k 0.00% Reduced -782 -782
75 WESBANCO BANK INC 0.00% of their portfolio WHEELING, WV 10,00010.0k $163.5k $163.5k 0.00% New
76 KLP KAPITALFORVALTNING AS 0.00% of their portfolio OSLO, Q8 8,5008.5k $139.0k $139.0k 0.00% New
77 CWM, LLC 0.00% of their portfolio OMAHA, NE 6,6666.7k $109.0k $109.0k 0.00% New
78 Ancora Advisors LLC 0.00% of their portfolio Cleveland, OH 5,3005.3k $86.7k $86.7k 0.00% New
79 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 5,1445.1k $84.0k $84.0k 0.00% Reduced -145.6k -145,556
80 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 5,0805.1k $83.1k $83.1k 0.00% New
81 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 5,0165.0k $82.0k $82.0k 0.00% New
82 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 3,5463.5k $58.0k $58.0k 0.00% Added +722 +722
83 Quarry LP 0.00% of their portfolio NEW YORK, NY 1,6111.6k $26.3k $26.3k 0.00% Reduced -1.1k -1,086
84 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 1,5641.6k $25.6k $25.6k 0.00% New
85 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 666666 $10.9k $10.9k 0.00% New
86 FIRST HORIZON CORP 0.00% of their portfolio MEMPHIS, TN 645645 $10.5k $10.5k 0.00% Added +351 +351
87 HM PAYSON & CO 0.00% of their portfolio PORTLAND, ME 419419 $6.9k $6.9k 0.00% New
88 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 398398 $6.5k $6.5k 0.00% Added +273 +273
89 Farther Finance Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 154154 $2.5k $2.5k 0.00% New
90 NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio MONTREAL, A8 144144 $2.4k $2.4k 0.00% New
91 Rachor Investment Advisory Services, LLC 0.00% of their portfolio Linden, MI 135135 $2.2k $2.2k 0.00% First filing
92 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 119119 $1.9k $1.9k 0.00% Reduced -216 -216
93 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 101101 $1.7k $1.7k 0.00% Reduced -66 -66
94 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 9393 $1.5k $1.5k 0.00% Reduced -1.8k -1,775
95 MAI Capital Management 0.00% of their portfolio INDEPENDENCE, OH 5757 $932 $932 0.00% New
96 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 1818 $294 $294 0.00% New
97 GAMMA Investing LLC 0.00% of their portfolio FOSTER CITY, CA 99 $147 $147 0.00% New
98 Rakuten Securities, Inc. 0.00% of their portfolio TOKYO, M0 11 $16 $16 0.00% Unchanged