Custom Truck One Source (CTOS)

Custom Truck One Source 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 services-equipment rental & leasing, nec.

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4.1M

Short interest

settlement 2026-09-30

5.1

Days to cover

+0.9 days vs prior

49.3%

Short share of volume

2026-10-09

24,497

Fails to deliver

settlement 2026-09-10

Mon 26 Oct

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in CTOS is 4,056,271 shares, down 376,142 shares over the last month. Over the last 48 readings it ranged from 1,714,631 shares (30 April 2026) to 5,736,695 shares (13 June 2025). At the reported average volume of 791K shares a day that is 5.1 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	4,056,271	-13.2%	790,630	5.13
2026-09-15	4,670,693	+5.4%	1,107,817	4.22
2026-08-31	4,432,413	+23.9%	748,290	5.92
2026-08-14	3,576,464	+1.9%	1,142,116	3.13
2026-07-31	3,509,945	+7.7%	1,176,337	2.98
2026-07-15	3,260,019	+8.0%	1,025,430	3.18
2026-06-30	3,018,553	+20.9%	1,282,532	2.35
2026-06-15	2,496,696	+19.1%	857,680	2.91
2026-05-29	2,096,135	+2.1%	804,991	2.60
2026-05-15	2,052,289	+19.7%	1,306,036	1.57
2026-04-30	1,714,631	-23.0%	1,335,509	1.28
2026-04-15	2,225,990	+13.5%	730,305	3.05
2026-03-31	1,961,641	+5.1%	741,640	2.65
2026-03-13	1,866,150	+6.1%	1,024,823	1.82
2026-02-27	1,758,769	-7.7%	863,839	2.04
2026-02-13	1,904,520	-5.8%	960,744	1.98
2026-01-30	2,021,798	-3.4%	710,331	2.85
2026-01-15	2,093,492	-2.6%	1,072,614	1.95
2025-12-31	2,150,529	-14.5%	763,551	2.82
2025-12-15	2,514,969	-9.7%	666,807	3.77
2025-11-28	2,785,393	-3.5%	942,313	2.96
2025-11-14	2,885,346	-15.2%	486,498	5.93
2025-10-31	3,400,659	-5.2%	853,379	3.98
2025-10-15	3,588,003	+6.8%	959,846	3.74

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of CTOS volume is 49.3%, up 3.3 points over the last five sessions. Over the last 30 readings it ranged from 35.8% (3 September 2026) to 66.1% (7 October 2026). The latest reading is 5.1 points below the 30-session average of 54.4%, on 205K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	101K	205K	49.3%	0
2026-10-08	170K	275K	61.6%	0
2026-10-07	274K	414K	66.1%	0
2026-10-06	138K	231K	59.5%	0
2026-10-05	102K	177K	57.4%	0
2026-10-02	110K	240K	46.0%	0
2026-10-01	143K	243K	58.8%	0
2026-09-30	48K	102K	47.1%	0
2026-09-29	76K	144K	52.6%	0
2026-09-28	81K	153K	53.0%	0
2026-09-25	70K	119K	59.2%	0
2026-09-24	106K	192K	55.1%	80
2026-09-23	145K	219K	65.9%	0
2026-09-22	103K	249K	41.5%	0
2026-09-21	118K	178K	66.1%	27
2026-09-18	242K	405K	59.8%	0
2026-09-17	123K	186K	65.9%	0
2026-09-16	201K	319K	63.0%	0
2026-09-15	245K	402K	60.9%	0
2026-09-14	160K	353K	45.4%	0
2026-09-11	81K	148K	55.1%	0
2026-09-10	149K	260K	57.4%	0
2026-09-09	114K	286K	40.1%	3,783
2026-09-08	199K	441K	45.1%	30,350
2026-09-04	141K	343K	41.0%	2,136
2026-09-03	150K	420K	35.8%	0
2026-09-02	187K	413K	45.1%	8,379
2026-09-01	291K	481K	60.5%	9,314
2026-08-31	143K	246K	58.2%	6,863
2026-08-28	238K	411K	58.0%	10,904

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 10 September 2026, the fails-to-deliver balance in CTOS is 24,497 shares, down 59,736 shares over the last settlement date. Over the last 30 readings it ranged from 89 shares (25 August 2026) to 452,437 shares (30 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-10	24,497	$9.25	$227K
2026-09-09	84,233	$9.44	$795K
2026-09-08	49,879	$9.19	$458K
2026-09-04	15,078	$8.94	$135K
2026-09-03	40,333	$8.97	$362K
2026-09-02	54,247	$8.87	$481K
2026-09-01	29,077	$9.21	$268K
2026-08-31	12,998	$9.20	$120K
2026-08-25	89	$9.77	$870
2026-08-13	640	$10.82	$7K
2026-08-06	382	$11.03	$4K
2026-08-04	39,822	$10.63	$423K
2026-07-17	18,280	$10.42	$190K
2026-07-02	187,503	$11.04	$2.1M
2026-07-01	382,694	$11.81	$4.5M
2026-06-30	452,437	$11.95	$5.4M
2026-06-29	408,424	$11.94	$4.9M
2026-06-26	223,823	$11.97	$2.7M
2026-06-25	165,678	$11.40	$1.9M
2026-06-24	68,694	$11.25	$773K
2026-06-23	128,442	$11.40	$1.5M
2026-06-22	52,436	$11.27	$591K
2026-06-18	52,688	$10.61	$559K
2026-06-17	55,617	$10.67	$593K
2026-06-16	112,197	$10.56	$1.2M
2026-06-15	52,705	$10.66	$562K
2026-06-12	203,811	$10.73	$2.2M
2026-06-11	159,253	$10.27	$1.6M
2026-06-10	159,038	$10.50	$1.7M
2026-06-09	108,168	$10.24	$1.1M

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for CTOS in the last 90 days. The most recent filings are listed below. Latest filing: McMonagle Ryan (Chief Executive Officer) on 2026-04-01.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-04-01	McMonagle Ryan	Chief Executive Officer	Tax withholding	55K	$6.62	$363K	696K
2026-04-01	McMonagle Ryan	Chief Executive Officer	Option exercise	122K	$0.00	$0	751K
2026-04-01	Eperjesy Christopher J	Chief Financial Officer	Tax withholding	41K	$6.62	$268K	284K
2026-04-01	Eperjesy Christopher J	Chief Financial Officer	Option exercise	90K	$0.00	$0	324K
2026-04-01	JOLAS PAUL M	EVP, General Counsel & Sec.	Tax withholding	20K	$6.62	$132K	81K
2026-04-01	JOLAS PAUL M	EVP, General Counsel & Sec.	Option exercise	51K	$0.00	$0	101K
2026-04-01	Rich Thomas R.	President - Rentals	Tax withholding	23K	$6.62	$149K	364K
2026-04-01	Rich Thomas R.	President - Rentals	Option exercise	75K	$0.00	$0	386K
2026-04-01	Ross Fredrick M. Jr.	Director	Tax withholding	39K	$6.62	$261K	540K
2026-04-01	Ross Fredrick M. Jr.	Director	Option exercise	131K	$0.00	$0	580K
2026-04-01	Ross Joe P.	President - Sales	Tax withholding	34K	$6.62	$224K	377K
2026-04-01	Ross Joe P.	President - Sales	Option exercise	75K	$0.00	$0	411K
2026-03-31	Heinberg Marshall A	Director	Option exercise	48K	$0.00	$0	401K
2026-03-31	Jackson Mary M.	Director	Option exercise	27K	$0.00	$0	82K
2026-03-31	NELSON GEORGIA R	Director	Option exercise	27K	$0.00	$0	133K
2026-03-31	EIN MARK	Director	Option exercise	27K	$0.00	$0	5.2M
2026-03-31	BADER PAUL T	Director	Option exercise	27K	$0.00	$0	121K
2026-02-23	Eperjesy Christopher J	Chief Financial Officer	Grant	28K	$0.00	$0	234K
2026-02-23	Rich Thomas R.	President - Rentals	Grant	25K	$0.00	$0	311K
2026-02-23	Ross Joe P.	President - Sales	Grant	25K	$0.00	$0	336K
2026-02-23	Ross Fredrick M. Jr.	Director	Grant	43K	$0.00	$0	448K
2026-02-23	McMonagle Ryan	Chief Executive Officer	Grant	40K	$0.00	$0	629K
2026-02-23	JOLAS PAUL M	EVP, General Counsel & Sec.	Grant	17K	$0.00	$0	50K
2025-10-17	EIN MARK	Director	J	3.7M	$0.00	$0	0
2025-04-01	McMonagle Ryan	Chief Executive Officer	Option exercise	163K	$0.00	$0	662K
2025-04-01	McMonagle Ryan	Chief Executive Officer	Tax withholding	73K	$4.20	$307K	589K
2025-04-01	Rich Thomas R.	President - Rentals	Tax withholding	46K	$4.20	$191K	286K
2025-04-01	Rich Thomas R.	President - Rentals	Option exercise	100K	$0.00	$0	332K
2025-04-01	JOLAS PAUL M	EVP, Gen. Counsel & Secretary	Tax withholding	14K	$4.20	$59K	34K
2025-04-01	JOLAS PAUL M	EVP, Gen. Counsel & Secretary	Option exercise	34K	$0.00	$0	48K
2025-04-01	Eperjesy Christopher J	Chief Financial Officer	Option exercise	68K	$0.00	$0	237K
2025-04-01	Eperjesy Christopher J	Chief Financial Officer	Tax withholding	31K	$4.20	$128K	207K
2025-04-01	Ross Joe P.	President - Sales	Tax withholding	46K	$4.20	$191K	311K
2025-04-01	Ross Joe P.	President - Sales	Option exercise	100K	$0.00	$0	357K
2025-04-01	BARRETT RAYMOND TODD	Chief Accounting Officer	Option exercise	15K	$0.00	$0	56K
2025-04-01	BARRETT RAYMOND TODD	Chief Accounting Officer	Tax withholding	5K	$4.20	$21K	51K
2025-04-01	Ross Fredrick M. Jr.	Director	Option exercise	175K	$0.00	$0	458K
2025-04-01	Ross Fredrick M. Jr.	Director	Tax withholding	53K	$4.20	$221K	405K
2025-03-31	Heinberg Marshall	Director	Option exercise	40K	$0.00	$0	352K
2025-03-31	NELSON GEORGIA R	Director	Option exercise	22K	$0.00	$0	106K
2025-03-31	BADER PAUL	Director	Option exercise	22K	$0.00	$0	94K
2025-03-31	EIN MARK	Director	Option exercise	22K	$0.00	$0	1.6M
2025-03-31	Jackson Mary M.	Director	Option exercise	22K	$0.00	$0	55K
2025-01-30	Gores Tom	TenPercentOwner	Buy	8.1M	$4.00	$32.6M	156.7M
2025-01-30	Platinum Equity InvestCo, L.P.	TenPercentOwner	Buy	8.1M	$4.00	$32.6M	156.7M
2024-12-31	Ross Joe P.	President - Sales	Tax withholding	11K	$4.81	$52K	257K
2024-12-31	Ross Joe P.	President - Sales	Option exercise	18K	$0.00	$0	268K
2024-12-31	Ross Fredrick M. Jr.	Director	Tax withholding	29K	$4.81	$137K	283K
2024-12-31	Ross Fredrick M. Jr.	Director	Option exercise	32K	$0.00	$0	311K
2024-12-31	Rich Thomas R.	President - Rentals	Tax withholding	11K	$4.81	$52K	232K

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. JSON

1 Form 144 notice on file for CTOS worth $94K at the prices reported; 0 in the last 90 days worth $0. Latest: BARRETT RAYMOND TODD filed on 2026-04-10 to sell 13,333 shares ($94K) from 2026-04-09.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-04-10	BARRETT RAYMOND TODDFormer Officer	13K	$94K	0.006%	2026-04-09	Morgan Stanley Smith Barney LLC

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

No holder on file reports 5% or more of CTOS in its latest filing.

Filed	Form	Holder	Shares	Of class	Event
2025-10-21	13D/Ano. 1	Mark Einindividual	5.2M	2.3%	2025-10-17
2025-10-21	13D/Ano. 1	Capitol Acquisition Management IV LLCother entity	0	0.0%	2025-10-17
2025-10-21	13D/Ano. 1	Capitol Acquisition Founder IV LLCother entity	0	0.0%	2025-10-17
2025-10-21	13D/Ano. 1	Dyson Drydenindividual	0	0.0%	2025-10-17

13F holders

Tracked managers holding CTOS at their latest 13F. JSON

5 of the 30 tracked managers held CTOS at their latest 13F, $18.9M in total at quarter-end prices. AQR Capital Management is the largest at $8.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
AQR Capital Management	2026-06-30	754K	$8.9M	0.00%	+103K
D. E. Shaw & Co.	2026-06-30	624K	$7.4M	0.00%	+441K
Point72 Asset Management	2026-06-30	179K	$2.1M	0.00%	-63K
Citadel Advisors	2026-06-30	23K	$275K	0.00%	-257K
Two Sigma Investments	2026-06-30	19K	$226K	0.00%	-11K

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

Custom Truck One Source 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 Custom Truck One Source (CTOS), SEC CIK 1709682, listed on NYSE, classified by the SEC as services-equipment rental & leasing, nec. 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 2026-09-30.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-10.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 2026-04-10.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 2025-10-21.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 2026-08-03.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 2026-04-01.JSON and CSV
Company record: EDGAR filing index for CIK 1709682Ticker, 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.

Other companies the SEC classifies as services-equipment rental & leasing, nec

Other company pages

Datasets

Frequently Asked Questions

How much of CTOS is sold short?

4,056,271 shares were held short at the 2026-09-30 settlement, 5.1 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 CTOS's daily short volume?

On 2026-10-09, 100,985 of the 205,011 CTOS shares reported to FINRA were sold short, 49.3% of the day's reported volume. Short volume is a flow for one day, not a position.

Does CTOS have fails to deliver?

The SEC's latest file shows 24,497 CTOS shares failed to deliver at settlement 2026-09-10. Fails are reported per settlement date and published twice a month with a lag.

Are CTOS insiders buying or selling?

No open-market insider trades were reported for CTOS in the last 90 days. The most recent filings are listed below. Latest filing: McMonagle Ryan (Chief Executive Officer) on 2026-04-01.

Have CTOS insiders filed to sell?

1 Form 144 notice on file for CTOS worth $94K at the prices reported; 0 in the last 90 days worth $0. Latest: BARRETT RAYMOND TODD filed on 2026-04-10 to sell 13,333 shares ($94K) from 2026-04-09.

Who owns 5% or more of CTOS?

No holder on file reports 5% or more of CTOS in its latest filing.

Which tracked 13F managers own CTOS?

5 of the 30 tracked 13F managers held CTOS shares at their latest filing, $18.9M in all. The largest: Cliff Asness's AQR Capital Management (754K shares, $8.9M), D. E. Shaw & Co. (624K shares, $7.4M), Steve Cohen's Point72 Asset Management (179K shares, $2.1M), Ken Griffin's Citadel Advisors (23K shares, $275K), Two Sigma Investments (19K shares, $226K).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.