Accelerant Holdings (ARX)
Accelerant Holdings on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as insurance agents, brokers & service.
3.2M
Short interest
settlement 2026-10-15
2.6
Days to cover
+0.9 days vs prior
58.5%
Short share of volume
2026-11-02
17
Fails to deliver
settlement 2026-10-09
Wed 11 Nov
Next earnings
estimated date
-$3.3M
Insider flow, 90 days
0 buys, 5 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 30 settlements in the table, 30 in the chart. JSONAs of 15 October 2026, short interest in ARX is 3,164,055 shares, down 1,614,971 shares over the last month. Over the last 30 readings it ranged from 1,440,434 shares (15 August 2025) to 6,849,378 shares (30 June 2026). At the reported average volume of 1.2M shares a day that is 2.6 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/arx" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,164,055 | -29.7% | 1,224,929 | 2.58 |
| 2026-09-30 | 4,501,161 | -5.8% | 2,661,233 | 1.69 |
| 2026-09-15 | 4,779,026 | -7.7% | 1,212,530 | 3.94 |
| 2026-08-31 | 5,177,939 | -11.3% | 3,689,492 | 1.40 |
| 2026-08-14 | 5,839,853 | -2.9% | 10,113,313 | 1.00 |
| 2026-07-31 | 6,013,471 | -11.1% | 2,853,880 | 2.11 |
| 2026-07-15 | 6,767,480 | -1.2% | 1,851,518 | 3.66 |
| 2026-06-30 | 6,849,378 | +27.0% | 2,847,379 | 2.41 |
| 2026-06-15 | 5,394,264 | -3.1% | 1,344,354 | 4.01 |
| 2026-05-29 | 5,567,076 | +41.7% | 1,622,159 | 3.43 |
| 2026-05-15 | 3,929,989 | +6.7% | 1,375,529 | 2.86 |
| 2026-04-30 | 3,682,606 | +7.9% | 1,180,964 | 3.12 |
| 2026-04-15 | 3,412,177 | +3.0% | 1,325,937 | 2.57 |
| 2026-03-31 | 3,312,521 | +42.6% | 1,485,897 | 2.23 |
| 2026-03-13 | 2,322,898 | +9.7% | 875,332 | 2.65 |
| 2026-02-27 | 2,118,103 | -1.8% | 1,204,002 | 1.76 |
| 2026-02-13 | 2,157,741 | -5.6% | 1,381,194 | 1.56 |
| 2026-01-30 | 2,286,630 | +21.7% | 1,321,176 | 1.73 |
| 2026-01-15 | 1,879,151 | +23.5% | 810,981 | 2.32 |
| 2025-12-31 | 1,521,204 | -24.0% | 852,542 | 1.78 |
| 2025-12-15 | 2,000,741 | -35.6% | 1,114,998 | 1.79 |
| 2025-11-28 | 3,104,932 | +15.4% | 1,008,431 | 3.08 |
| 2025-11-14 | 2,689,571 | +54.0% | 1,570,266 | 1.71 |
| 2025-10-31 | 1,745,973 | -10.2% | 802,491 | 2.18 |
| 2025-10-15 | 1,944,868 | -37.6% | 1,428,745 | 1.36 |
| 2025-09-30 | 3,119,419 | +29.0% | 1,003,128 | 3.11 |
| 2025-09-15 | 2,418,365 | +54.2% | 1,359,218 | 1.78 |
| 2025-08-29 | 1,568,408 | +8.9% | 1,801,610 | 1.00 |
| 2025-08-15 | 1,440,434 | -33.8% | 619,600 | 2.32 |
| 2025-07-31 | 2,177,014 | +100.0% | 3,168,291 | 1.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of ARX volume is 58.5%, up 33.6 points over the last five sessions. Over the last 30 readings it ranged from 2.3% (30 September 2026) to 67.3% (28 October 2026). The latest reading is 27.7 points above the 30-session average of 30.8%, on 145K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 85K | 145K | 58.5% | 22 |
| 2026-10-30 | 119K | 198K | 60.2% | 927 |
| 2026-10-29 | 154K | 238K | 64.7% | 3,310 |
| 2026-10-28 | 74K | 110K | 67.3% | 0 |
| 2026-10-27 | 105K | 207K | 50.8% | 0 |
| 2026-10-26 | 93K | 375K | 24.9% | 18,218 |
| 2026-10-23 | 145K | 1.1M | 13.2% | 0 |
| 2026-10-22 | 131K | 809K | 16.1% | 2 |
| 2026-10-21 | 88K | 351K | 25.1% | 0 |
| 2026-10-20 | 508K | 1.6M | 32.0% | 0 |
| 2026-10-19 | 140K | 408K | 34.3% | 0 |
| 2026-10-16 | 207K | 895K | 23.2% | 0 |
| 2026-10-15 | 111K | 547K | 20.3% | 0 |
| 2026-10-14 | 186K | 667K | 27.9% | 82 |
| 2026-10-13 | 116K | 366K | 31.8% | 0 |
| 2026-10-12 | 170K | 450K | 37.7% | 4 |
| 2026-10-09 | 259K | 846K | 30.7% | 209 |
| 2026-10-08 | 47K | 451K | 10.5% | 0 |
| 2026-10-07 | 90K | 815K | 11.0% | 42 |
| 2026-10-06 | 72K | 1.2M | 6.1% | 0 |
| 2026-10-05 | 274K | 902K | 30.4% | 404 |
| 2026-10-02 | 222K | 861K | 25.8% | 1,616 |
| 2026-10-01 | 115K | 315K | 36.5% | 0 |
| 2026-09-30 | 74K | 3.2M | 2.3% | 17 |
| 2026-09-29 | 502K | 3.1M | 16.4% | 5 |
| 2026-09-28 | 170K | 428K | 39.7% | 296 |
| 2026-09-25 | 133K | 267K | 49.9% | 113 |
| 2026-09-24 | 71K | 309K | 23.1% | 7 |
| 2026-09-23 | 245K | 1.0M | 23.9% | 0 |
| 2026-09-22 | 109K | 357K | 30.4% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 9 October 2026, the fails-to-deliver balance in ARX is 17 shares, down 156,545 shares over the last settlement date. Over the last 30 readings it ranged from 9 shares (9 June 2026) to 1,235,458 shares (29 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-09 | 17 | $19.75 | $336 |
| 2026-09-24 | 156,562 | $19.72 | $3.1M |
| 2026-09-22 | 986 | $19.78 | $20K |
| 2026-09-18 | 19 | $19.82 | $377 |
| 2026-09-14 | 29,207 | $19.84 | $579K |
| 2026-09-02 | 27 | $19.78 | $534 |
| 2026-08-19 | 425 | $19.56 | $8K |
| 2026-08-17 | 2,999 | $19.58 | $59K |
| 2026-08-14 | 69 | $19.51 | $1K |
| 2026-07-20 | 7,926 | $13.52 | $107K |
| 2026-07-06 | 59,341 | $13.77 | $817K |
| 2026-07-02 | 34,254 | $12.84 | $440K |
| 2026-07-01 | 34,591 | $11.72 | $405K |
| 2026-06-30 | 269 | $12.63 | $3K |
| 2026-06-29 | 1,235,458 | $13.74 | $17.0M |
| 2026-06-25 | 5,665 | $13.37 | $76K |
| 2026-06-24 | 5,815 | $13.13 | $76K |
| 2026-06-22 | 905,500 | $12.99 | $11.8M |
| 2026-06-09 | 9 | $14.32 | $129 |
| 2026-06-08 | 146,831 | $14.99 | $2.2M |
| 2026-06-04 | 174,714 | $14.61 | $2.6M |
| 2026-06-01 | 44,473 | $15.95 | $709K |
| 2026-05-29 | 267,400 | $16.27 | $4.4M |
| 2026-05-28 | 3,981 | $16.35 | $65K |
| 2026-05-22 | 9,187 | $16.99 | $156K |
| 2026-05-21 | 13,988 | $16.69 | $233K |
| 2026-05-20 | 630 | $16.54 | $10K |
| 2026-05-19 | 1,425 | $15.91 | $23K |
| 2026-05-18 | 33 | $15.44 | $510 |
| 2026-05-15 | 47,089 | $14.61 | $688K |
Insider trades
SEC Form 4, newest first. JSONInsiders at ARX reported 5 open-market sells worth $3.3M in the last 90 days and no open-market buys. Latest filing: Meriwether Karen Sue (Director) on 2026-08-21.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-21 | Meriwether Karen Sue | Director | Sell | 542 | $19.62 | $11K | 21K |
| 2026-08-13 | Hasley Nancy | Director | Sell | 20K | $19.56 | $401K | 1.3M |
| 2026-08-11 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 89K | $12.41 | $1.1M | 6.4M |
| 2026-08-10 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 64K | $12.07 | $768K | 6.5M |
| 2026-08-10 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $12.09 | $967K | 27.6M |
| 2026-08-03 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $12.06 | $965K | 27.7M |
| 2026-07-28 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 105K | $14.56 | $1.5M | 6.5M |
| 2026-07-27 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 110K | $14.63 | $1.6M | 6.6M |
| 2026-07-27 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 15K | $14.45 | $220K | 27.8M |
| 2026-07-27 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $14.63 | $1.2M | 27.8M |
| 2026-07-27 | Sternberg Matthew David | COO, Risk Exchange | Sell | 18K | $14.64 | $257K | 596K |
| 2026-07-23 | Sternberg Matthew David | COO, Risk Exchange | Tax withholding | 4K | $13.77 | $54K | 614K |
| 2026-07-20 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $13.51 | $1.1M | 27.8M |
| 2026-07-17 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 15K | $14.30 | $211K | 27.9M |
| 2026-07-15 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 83K | $12.71 | $1.1M | 6.7M |
| 2026-07-14 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 83K | $12.84 | $1.1M | 6.8M |
| 2026-07-13 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $13.18 | $1.1M | 27.9M |
| 2026-07-06 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $13.33 | $1.1M | 28.0M |
| 2026-06-29 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $12.87 | $1.0M | 28.1M |
| 2026-06-26 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 74K | $13.18 | $969K | 6.9M |
| 2026-06-25 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 74K | $13.06 | $960K | 7.0M |
| 2026-06-23 | Hasley Nancy | Director | Sell | 35K | $13.11 | $459K | 1.4M |
| 2026-06-23 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80K | $13.11 | $1.0M | 28.2M |
| 2026-06-23 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 76K | $13.11 | $1.0M | 7.1M |
| 2026-06-22 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 71K | $13.21 | $932K | 7.1M |
| 2026-05-13 | Sternberg Matthew David | COO, Risk Exchange | Grant | 279K | $0.00 | $0 | 618K |
| 2026-05-13 | Wainwright Simon | Director | Grant | 23K | $0.00 | $0 | 23K |
| 2026-05-13 | Talach David George Paul | Director | Grant | 23K | $0.00 | $0 | 23K |
| 2026-05-13 | Meriwether Karen Sue | Director | Grant | 12K | $0.00 | $0 | 21K |
| 2026-05-13 | Hasley Nancy | Director | Grant | 12K | $0.00 | $0 | 1.4M |
| 2026-05-13 | Little Paul Christopher | Director | Grant | 12K | $0.00 | $0 | 21K |
| 2026-03-23 | Green Jay Michael | Chief Financial Officer | Sell | 50K | $12.77 | $638K | 1.2M |
| 2026-03-18 | RADKE JEFFREY L | Co-Founder, CEO | Grant | 300K | $0.00 | $0 | 334K |
| 2026-03-18 | ONeill Francis James | Co-Founder, Chief U/W Officer | Grant | 129K | $0.00 | $0 | 7.4M |
| 2026-03-18 | Lee-Smith Christopher | Co-Founder, Head of Distrib. | Grant | 129K | $0.00 | $0 | 17.8M |
| 2026-03-18 | Sternberg Matthew David | COO, Risk Exchange | Grant | 181K | $0.00 | $0 | 339K |
| 2026-03-17 | Green Jay Michael | Chief Financial Officer | Tax withholding | 29K | $11.63 | $333K | 1.2M |
| 2026-02-02 | Green Jay Michael | Chief Financial Officer | Tax withholding | 201K | $12.76 | $2.6M | 1.3M |
| 2025-12-08 | Meriwether Karen Sue | Director | Buy | 542 | $14.67 | $8K | 10K |
| 2025-11-19 | Gaynor Samuel | Director | Buy | 8K | $13.44 | $101K | 8K |
| 2025-11-19 | Lee-Smith Christopher | Co-Founder, Head of Distrib. | Buy | 15K | $13.42 | $197K | 17.7M |
| 2025-11-18 | ONeill Francis James | Co-Founder, Chief U/W Officer | Buy | 38K | $13.34 | $507K | 7.2M |
| 2025-11-17 | Sternberg Matthew David | COO, Risk Exchange | Buy | 6K | $13.10 | $75K | 158K |
| 2025-11-14 | RADKE JEFFREY L | Co-Founder, CEO | Buy | 74K | $13.48 | $999K | 28.3M |
| 2025-07-25 | Green Jay Michael | Chief Financial Officer | Grant | 1.5M | price not stated in the filing | not stated | 1.5M |
| 2025-07-25 | Harrington Wendy Liisa | Director | Conversion | 8K | price not stated in the filing | not stated | 17K |
| 2025-07-25 | Harrington Wendy Liisa | Director | Conversion | 6K | price not stated in the filing | not stated | 23K |
| 2025-07-25 | Hasley Nancy | General Counsel | Conversion | 513K | price not stated in the filing | not stated | 513K |
| 2025-07-25 | Hasley Nancy | General Counsel | Conversion | 1.4M | price not stated in the filing | not stated | 1.4M |
| 2025-07-25 | Hasley Nancy | General Counsel | Buy | 500 | $21.00 | $11K | 500 |
| 2025-07-25 | Hasley Nancy | General Counsel | Conversion | 17K | price not stated in the filing | not stated | 1.4M |
| 2025-07-25 | Lee-Smith Christopher | Co-Founder, Head of Distrib. | Conversion | 17.5M | price not stated in the filing | not stated | 17.5M |
| 2025-07-25 | ONeill Francis James | Co-Founder, Chief U/W Officer | Conversion | 8K | price not stated in the filing | not stated | 7.1M |
| 2025-07-25 | ONeill Francis James | Co-Founder, Chief U/W Officer | Conversion | 7.1M | price not stated in the filing | not stated | 7.1M |
| 2025-07-25 | RADKE JEFFREY L | Co-Founder, CEO | Conversion | 27.9M | price not stated in the filing | not stated | 27.9M |
| 2025-07-25 | RADKE JEFFREY L | Co-Founder, CEO | Conversion | 250K | price not stated in the filing | not stated | 250K |
| 2025-07-25 | RADKE JEFFREY L | Co-Founder, CEO | Conversion | 33K | price not stated in the filing | not stated | 33K |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Sell | 488K | $21.00 | $10.3M | 0 |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Conversion | 8.1M | price not stated in the filing | not stated | 8.1M |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Sell | 8.1M | $21.00 | $170.3M | 0 |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Conversion | 2.7M | price not stated in the filing | not stated | 2.7M |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Sell | 2.7M | $21.00 | $56.1M | 0 |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Conversion | 488K | price not stated in the filing | not stated | 488K |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Sell | 326K | $21.00 | $6.9M | 0 |
| 2025-07-25 | ACP Accelerant Holdings, L.P. | TenPercentOwner | Conversion | 326K | price not stated in the filing | not stated | 326K |
| 2025-07-25 | Sternberg Matthew David | COO, Risk Exchange | Grant | 152K | $0.00 | $0 | 152K |
| 2025-07-25 | Meriwether Karen Sue | Director | Grant | 9K | $0.00 | $0 | 9K |
| 2025-07-25 | Little Paul Christopher | Director | Grant | 9K | $0.00 | $0 | 9K |
| 2025-07-25 | Harrington Wendy Liisa | Director | Grant | 9K | $0.00 | $0 | 9K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON16 Form 144 notices on file for ARX worth $13.6M at the prices reported; 3 in the last 90 days worth $1.2M. Latest: KAREN MERIWETHER filed on 2026-08-21 to sell 542 shares ($11K) from 2026-08-21.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-21 | KAREN MERIWETHERDirector | 542 | $11K | 0.000% | 2026-08-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-13 | NANCY HASLEYDirector | 20K | $279K | 0.017% | 2026-08-13 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-10 | RADKE JEFFREY LOfficer, Director | 80K | $959K | 0.071% | 2026-08-10 | Wells Fargo Clearing Services |
| 2026-08-03 | RADKE JEFFREY LOfficer, Director | 80K | $956K | 0.071% | 2026-08-03 | Wells Fargo Clearing Services |
| 2026-07-27 | RADKE JEFFREY LOfficer, Director | 95K | $1.4M | 0.084% | 2026-07-27 | Wells Fargo Clearing Services |
| 2026-07-27 | MATTHEW STERNBERGOfficer | 18K | $250K | 0.016% | 2026-07-27 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-07-24 | RADKE JEFFREY LOfficer, Director | 30K | $425K | 0.027% | 2026-07-24 | Wells Fargo Clearing Services |
| 2026-07-20 | RADKE JEFFREY LOfficer, Director | 80K | $1.1M | 0.071% | 2026-07-20 | Wells Fargo Clearing Services |
| 2026-07-17 | RADKE JEFFREY LOfficer, Director | 15K | $209K | 0.013% | 2026-07-17 | Wells Fargo Clearing Services |
| 2026-07-13 | RADKE JEFFREY LOfficer, Director | 80K | $1.0M | 0.071% | 2026-07-13 | Wells Fargo Clearing Services |
| 2026-07-06 | RADKE JEFFREY LOfficer, Director | 80K | $1.1M | 0.071% | 2026-07-06 | Wells Fargo Clearing Services |
| 2026-06-29 | RADKE JEFFREY LOfficer, Director | 80K | $1.0M | 0.071% | 2026-06-29 | Wells Fargo Clearing Services |
| 2026-06-23 | RADKE JEFFREY LOfficer, Director | 80K | $1.0M | 0.071% | 2026-06-23 | Wells Fargo Clearing Services |
| 2026-06-23 | NANCY HASLEYDirector, Officer | 35K | $451K | 0.031% | 2026-06-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-05-18 | JAY GREENFormer affiliate | 180K | $2.8M | 0.160% | 2026-05-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-03-23 | JAY GREENOfficer | 50K | $648K | 0.043% | 2026-03-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON8 holders report 5% or more of ARX in their latest filing, all on Schedule 13G (passive). The largest reported stake is Schwartz Keoni Andrew at 44.2% of the class (90,916,741 shares), filed 2025-11-14 for an event on 2025-09-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-09-30 | 13G | Paul J. Glazerindividual | 6.0M | 5.0% | 2026-09-23 |
| 2026-09-30 | 13G | Glazer Capital, LLCinvestment adviser, other entity | 6.0M | 5.0% | 2026-09-23 |
| 2026-05-14 | 13G/Ano. 1 | Capital World Investorsinvestment adviser | 5.2M | 4.4% | 2026-03-31 |
| 2025-11-14 | 13G | Schwartz Keoni Andrewindividual, parent holding company | 90.9M | 44.2% | 2025-09-30 |
| 2025-11-14 | 13G | ACP Insurance Management, LLCother entity | 90.9M | 44.2% | 2025-09-30 |
| 2025-11-14 | 13G | ACP Accelerant Holdings, L.P.partnership | 86.0M | 42.9% | 2025-09-30 |
| 2025-11-14 | 13G | RADKE JEFFREY Lindividual | 36.8M | 29.9% | 2025-09-30 |
| 2025-11-14 | 13G | ONeill Francis Jamesindividual | 8.1M | 7.0% | 2025-09-30 |
| 2025-11-14 | 13G | Lee-Smith Christopherindividual | 20.4M | 17.4% | 2025-09-30 |
13F holders
Tracked managers holding ARX at their latest 13F. JSON5 of the 30 tracked managers held ARX at their latest 13F, $25.2M in total at quarter-end prices. Citadel Advisors is the largest at $20.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 1 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 1.7M | $20.5M | 0.00% | +604K |
| Renaissance Technologies | 2026-06-30 | 296K | $3.5M | 0.00% | +20K |
| Tiger Global Management | 2026-06-30 | 75K | $879K | 0.00% | 0 |
| Millennium Management | 2026-06-30 | 17K | $205K | 0.00% | -108K |
| Two Sigma Investments | 2026-06-30 | 11K | $130K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Accelerant Holdings in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Accelerant Holdings (ARX), SEC CIK 1997350, listed on NYSE, classified by the SEC as insurance agents, brokers & service. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-09.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-21.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-09-30.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-13.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-21.JSON and CSV
- Company record
- EDGAR filing index for CIK 1997350Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of ARX is sold short?
3,164,055 shares were held short at the 2026-10-15 settlement, 2.6 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is ARX's daily short volume?
On 2026-11-02, 84,683 of the 144,726 ARX shares reported to FINRA were sold short, 58.5% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ARX have fails to deliver?
The SEC's latest file shows 17 ARX shares failed to deliver at settlement 2026-10-09. Fails are reported per settlement date and published twice a month with a lag.
Are ARX insiders buying or selling?
Insiders at ARX reported 5 open-market sells worth $3.3M in the last 90 days and no open-market buys. Latest filing: Meriwether Karen Sue (Director) on 2026-08-21.
Have ARX insiders filed to sell?
16 Form 144 notices on file for ARX worth $13.6M at the prices reported; 3 in the last 90 days worth $1.2M. Latest: KAREN MERIWETHER filed on 2026-08-21 to sell 542 shares ($11K) from 2026-08-21.
Who owns 5% or more of ARX?
8 holders report 5% or more of ARX in their latest filing, all on Schedule 13G (passive). The largest reported stake is Schwartz Keoni Andrew at 44.2% of the class (90,916,741 shares), filed 2025-11-14 for an event on 2025-09-30.
Which tracked 13F managers own ARX?
5 of the 30 tracked 13F managers held ARX shares at their latest filing, $25.2M in all. The largest: Ken Griffin's Citadel Advisors (1.7M shares, $20.5M), Renaissance Technologies (296K shares, $3.5M), Chase Coleman's Tiger Global Management (75K shares, $879K), Izzy Englander's Millennium Management (17K shares, $205K), Two Sigma Investments (11K shares, $130K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.