XOOMAR

ICON (ICLR)

ICON on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials and insider trades. Listed on Nasdaq, classified by the SEC as services-commercial physical & biological research.

Download CSV

2.8M

Short interest

settlement 2026-09-30

2.5

Days to cover

-0.2 days vs prior

36.9%

Short share of volume

2026-10-09

709

Fails to deliver

settlement 2026-09-11

-$4.0M

Insider flow, 90 days

0 buys, 37 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 ICLR is 2,801,170 shares, up 422,077 shares over the last month. Over the last 48 readings it ranged from 1,080,136 shares (31 October 2024) to 3,292,216 shares (15 May 2026). At the reported average volume of 1.1M shares a day that is 2.5 days to cover.

Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/iclr" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
PreviewDark previewAdd ?theme=dark to the src for a dark chart.
SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-302,801,170+6.6%1,103,9852.54
2026-09-152,626,654+10.4%948,0452.77
2026-08-312,379,093+7.1%475,2935.01
2026-08-142,220,474-0.1%638,2743.48
2026-07-312,223,311-14.4%963,3792.31
2026-07-152,596,851-13.2%610,6874.25
2026-06-302,991,578-7.7%1,238,2952.42
2026-06-153,240,155+7.8%1,109,7572.92
2026-05-293,006,810-8.7%1,194,6382.52
2026-05-153,292,216+22.9%937,6393.51
2026-04-302,678,541-13.4%1,813,8361.48
2026-04-153,094,555+6.8%788,4263.92
2026-03-312,896,513+42.8%938,4203.09
2026-03-132,029,053+5.2%1,187,9881.71
2026-02-271,929,158-3.5%2,019,2571.00
2026-02-132,000,193-29.2%4,988,1991.00
2026-01-302,823,591+3.0%732,0913.86
2026-01-152,742,161+3.9%1,146,9042.39
2025-12-312,639,596-5.3%616,6384.28
2025-12-152,785,807-0.1%1,029,4882.71
2025-11-282,788,306+46.9%1,130,9302.47
2025-11-141,898,717+0.5%633,7243.00
2025-10-311,889,137-16.1%1,202,0251.57
2025-10-152,251,815-9.2%836,7612.69

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of ICLR volume is 36.9%, down 30.4 points over the last five sessions. Over the last 30 readings it ranged from 30.5% (15 September 2026) to 82.1% (8 October 2026). The latest reading is 19.1 points below the 30-session average of 56.0%, on 398K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-09147K398K36.9%0
2026-10-08339K413K82.1%1
2026-10-07183K359K50.9%1,269
2026-10-06291K455K64.1%200
2026-10-05206K470K43.9%260
2026-10-02141K209K67.3%1
2026-10-01193K294K65.7%53
2026-09-30157K417K37.6%0
2026-09-29408K693K58.9%0
2026-09-28388K513K75.6%321
2026-09-25213K320K66.6%4,589
2026-09-24332K867K38.3%1,460
2026-09-23157K465K33.8%138
2026-09-22191K338K56.6%56
2026-09-21224K388K57.8%15
2026-09-18218K329K66.2%463
2026-09-17235K559K42.0%2,314
2026-09-16111K243K45.8%2,770
2026-09-15111K362K30.5%226
2026-09-14284K504K56.4%800
2026-09-11373K936K39.8%1,009
2026-09-10282K496K56.9%9,342
2026-09-09268K329K81.5%0
2026-09-08254K337K75.4%0
2026-09-04241K302K79.7%4
2026-09-03159K279K56.8%6
2026-09-02179K407K43.9%0
2026-09-01118K244K48.6%179
2026-08-31144K269K53.8%0
2026-08-2876K114K66.4%11

Fails to deliver

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

As of 11 September 2026, the fails-to-deliver balance in ICLR is 709 shares, up 692 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (15 June 2026) to 166,041 shares (1 June 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-11709$165.69$117K
2026-09-0417$163.58$3K
2026-09-02756$161.40$122K
2026-09-0117$164.99$3K
2026-08-31151$170.02$26K
2026-08-2775$168.93$13K
2026-08-267,659$168.91$1.3M
2026-08-2536$173.48$6K
2026-08-20757$172.49$131K
2026-08-143,330$167.48$558K
2026-08-10199$164.51$33K
2026-08-0694$163.51$15K
2026-08-04512$158.41$81K
2026-08-0313,393$163.57$2.2M
2026-07-277$165.76$1K
2026-07-246$170.32$1K
2026-07-231,522$167.28$255K
2026-07-176,882$170.00$1.2M
2026-07-16129$172.08$22K
2026-07-151,373$167.97$231K
2026-07-1417$166.10$3K
2026-07-0915$165.47$2K
2026-06-30201$172.99$35K
2026-06-25163$158.17$26K
2026-06-22883$146.00$129K
2026-06-181,503$143.27$215K
2026-06-151$146.18$146
2026-06-12480$149.92$72K
2026-06-0880$149.45$12K
2026-06-01166,041$136.07$22.6M

Insider trades

SEC Form 4, newest first. JSON

Insiders at ICLR reported 37 open-market sells worth $4.0M in the last 90 days and no open-market buys. Latest filing: Murphy Ronan Martin (Director) on 2026-09-17.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-17Murphy Ronan MartinDirectorSell5K$175.00$876K4K
2026-09-17Murphy Ronan MartinDirectorOption exercise5K$125.74$629K9K
2026-09-17McCague Eugene PacelliDirectorSell3K$175.00$570K4K
2026-09-17McCague Eugene PacelliDirectorOption exercise3K$125.74$409K7K
2026-09-16CLIMAX JOHN DRDirectorSell5K$175.00$876K2K
2026-09-16CLIMAX JOHN DRDirectorOption exercise5K$125.74$629K7K
2026-08-11Clerkin Nigel Bernard JohnChief Financial OfficerSell180$165.51$30K6K
2026-08-11Clerkin Nigel Bernard JohnChief Financial OfficerSell2K$164.47$262K6K
2026-08-11Clerkin Nigel Bernard JohnChief Financial OfficerSell259$163.77$42K8K
2026-08-11Clerkin Nigel Bernard JohnChief Financial OfficerSell237$162.72$39K8K
2026-08-11CLIMAX JOHN DRDirectorSell67$165.51$11K2K
2026-08-11CLIMAX JOHN DRDirectorSell591$164.47$97K2K
2026-08-11CLIMAX JOHN DRDirectorSell95$163.77$16K3K
2026-08-11CLIMAX JOHN DRDirectorSell88$162.72$14K3K
2026-08-11Grais LindaDirectorSell67$165.51$11K6K
2026-08-11Grais LindaDirectorSell590$164.47$97K6K
2026-08-11Grais LindaDirectorSell97$163.77$16K7K
2026-08-11Grais LindaDirectorSell87$162.72$14K7K
2026-08-11McCague Eugene PacelliDirectorSell67$165.51$11K4K
2026-08-11McCague Eugene PacelliDirectorSell590$164.47$97K4K
2026-08-11McCague Eugene PacelliDirectorSell96$163.77$16K4K
2026-08-11McCague Eugene PacelliDirectorSell88$162.72$14K5K
2026-08-11Murphy Ronan MartinDirectorSell67$165.51$11K4K
2026-08-11Murphy Ronan MartinDirectorSell590$164.47$97K4K
2026-08-11Murphy Ronan MartinDirectorSell96$163.77$16K5K
2026-08-11Murphy Ronan MartinDirectorSell88$162.72$14K5K
2026-08-11Murray CiaranDirectorSell212$165.51$35K20K
2026-08-11Murray CiaranDirectorSell2K$164.47$309K21K
2026-08-11Murray CiaranDirectorSell305$163.77$50K23K
2026-08-11Murray CiaranDirectorSell280$162.72$46K23K
2026-08-11O'Neill JulieDirectorSell73$165.51$12K4K
2026-08-11O'Neill JulieDirectorSell642$164.47$106K4K
2026-08-11O'Neill JulieDirectorSell105$163.77$17K4K
2026-08-11O'Neill JulieDirectorSell95$162.72$15K4K
2026-08-11Whitaker Anne ClemDirectorSell67$165.51$11K891
2026-08-11Whitaker Anne ClemDirectorSell590$164.47$97K958
2026-08-11Whitaker Anne ClemDirectorSell96$163.77$16K2K
2026-08-11Whitaker Anne ClemDirectorSell88$162.72$14K2K
2026-08-10Balfe Barry EdwardChief Executive OfficerSell78$165.14$13K5K
2026-08-10Balfe Barry EdwardChief Executive OfficerSell304$163.80$50K5K
2026-08-10Clerkin Nigel Bernard JohnChief Financial OfficerOption exercise3Kprice not stated in the filingnot stated8K
2026-08-10Clerkin Nigel Bernard JohnChief Financial OfficerOption exercise918price not stated in the filingnot stated5K
2026-08-10CLIMAX JOHN DRDirectorOption exercise2Kprice not stated in the filingnot stated3K
2026-08-10Grais LindaDirectorOption exercise2Kprice not stated in the filingnot stated7K
2026-08-10McCague Eugene PacelliDirectorOption exercise2Kprice not stated in the filingnot stated5K
2026-08-10Murphy Ronan MartinDirectorOption exercise2Kprice not stated in the filingnot stated5K
2026-08-10Murray CiaranDirectorOption exercise3Kprice not stated in the filingnot stated23K
2026-08-10O'Neill JulieDirectorOption exercise2Kprice not stated in the filingnot stated4K
2026-08-10Whitaker Anne ClemDirectorOption exercise2Kprice not stated in the filingnot stated2K
2026-08-07Balfe Barry EdwardChief Executive OfficerOption exercise728price not stated in the filingnot stated5K

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

16 Form 144 notices on file for ICLR worth $8.2M at the prices reported; 12 in the last 90 days worth $4.0M. Latest: RONAN MARTIN MURPHY filed on 2026-09-17 to sell 5,005 shares ($876K) from 2026-09-17.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-17RONAN MARTIN MURPHYDirector5K$876K0.006%2026-09-17Morgan Stanley Smith Barney LLC Executive Financial Services
2026-09-17EUGENE PACELLI MCCAGUEDirector3K$570K0.004%2026-09-17Morgan Stanley Smith Barney LLC Executive Financial Services
2026-09-16JOHN CLIMAXDirector5K$876K0.006%2026-09-16Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11ANNE WHITAKERDirector841$138K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11EUGENE PACELLI MCCAGUEDirector841$138K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11RONAN MARTIN MURPHYDirector841$138K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11JULIE ANN O'NEILLDirector915$150K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11CIARAN MURRAYDirector3K$440K0.003%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11LINDA SUE GRAISDirector841$138K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11NIGEL CLERKINOfficer2K$372K0.003%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-11JOHN CLIMAXDirector841$138K0.001%2026-08-11Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-10BARRY EDWARD BALFEOfficer382$63K0.000%2026-08-10Morgan Stanley Smith Barney LLC Executive Financial Services
2026-03-09BARRY EDWARD BALFEOfficer3K$301K0.004%2026-03-09Morgan Stanley Smith Barney LLC Executive Financial Services
2026-03-04BARRY EDWARD BALFEOfficer566$62K0.001%2026-03-04Morgan Stanley Smith Barney LLC Executive Financial Services
2025-11-03NIGEL CLERKINOfficer1K$249K0.002%2025-11-03Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-02STEPHEN CUTLEROfficer19K$3.6M0.024%2025-10-02Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

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

14 holders report 5% or more of ICLR in their latest filing, all on Schedule 13G (passive). The largest reported stake is Artisan Partners Asset Management Inc. at 10.9% of the class (8,361,303 shares), filed 2026-03-06 for an event on 2026-02-27.

FiledFormHolderSharesOf classEvent
2026-08-1313G/Ano. 1Invesco Ltd.parent holding company, investment adviser5.3M6.9%2026-06-30
2026-08-0613G/Ano. 1FMR LLCparent holding company5.3M6.9%2026-06-30
2026-08-0613G/Ano. 1Abigail P. Johnsonindividual5.3M6.9%2026-06-30
2026-05-1513G/Ano. 2ORBIS INVESTMENT MANAGEMENT LTDnon-US institution00.0%2026-03-31
2026-05-1513G/Ano. 2Allan Gray Australia Pty Ltdnon-US institution00.0%2026-03-31
2026-05-1513G/Ano. 1Wellington Investment Advisors Holdings LLPparent holding company5.9M7.7%2026-03-31
2026-05-1513G/Ano. 1Wellington Management Group LLPparent holding company5.9M7.7%2026-03-31
2026-05-1513G/Ano. 1Wellington Group Holdings LLPparent holding company5.9M7.7%2026-03-31
2026-05-1513G/Ano. 1Wellington Management Company LLPinvestment adviser5.9M6.7%2026-03-31
2026-05-1513GHarris Associates, Inc.corporation4.4M5.7%2026-03-31
2026-05-1513GHARRIS ASSOCIATES L Pinvestment adviser4.4M5.7%2026-03-31
2026-03-0613G/Ano. 2Artisan Partners Asset Management Inc.parent holding company8.4M10.9%2026-02-27
2026-03-0613G/Ano. 2Artisan Partners Holdings LPparent holding company8.4M10.9%2026-02-27
2026-03-0613G/Ano. 2Artisan Investments GP LLCparent holding company8.4M10.9%2026-02-27
2026-03-0613G/Ano. 2Artisan Partners Limited Partnershipinvestment adviser8.4M10.9%2026-02-27
2026-03-0613G/Ano. 2Artisan Partners Funds, Inc.insurance company6.4M8.4%2026-02-27

13F holders

Tracked managers holding ICLR at their latest 13F. JSON

5 of the 30 tracked managers held ICLR at their latest 13F, $334.3M in total at quarter-end prices. D. E. Shaw & Co. is the largest at $235.7M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.

FundQuarterSharesValueOf portfolioChange in shares
D. E. Shaw & Co.2026-06-301.4M$235.7M0.11%+159K
Point72 Asset Management2026-06-30366K$63.6M0.07%+356K
Citadel Advisors2026-06-30149K$25.8M0.00%-103K
Millennium Management2026-06-3048K$8.4M0.00%-2K
Renaissance Technologies2026-06-305K$782K0.00%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.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) ICON reported revenue of $2.06B, up 1.2% from the same quarter a year earlier, and net income of $72.6M (0.94 diluted EPS). In FY 2025 it generated $1.04B of operating cash flow and spent $750.0M on buybacks. As of 2026-06-30, cash was $928.4M against $2.11B of debt.

Cash
$928.4M
Debt
$2.11B
Equity
$9.38B
Total assets
$16.40B
Shares outstanding
76,567,325

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 FY 20262026-06-30$2.06B$72.6M3.5%0.94
Q1 FY 20262026-03-31$2.03B$104.8M5.2%1.36
Q4 FY 2025derived2025-12-31$2.11B$149.2M7.1%n/a
Q3 FY 20252025-09-30$2.08B-$284.2M-13.6%-3.67
Q2 FY 20252025-06-30$2.04B$203.5M10.0%2.56
Q1 FY 20252025-03-31$2.02B$160.8M8.0%1.99
Q4 FY 2024derived2024-12-31$2.06B$294.7M14.3%n/a
Q3 FY 20242024-09-30$2.04B$213.3M10.4%2.56

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$8.25B$229.3M$1.04B$174.2M$750.0Mn/a
FY 20242024-12-31$8.19B$739.1M$1.29B$168.1M$500.0Mn/a
FY 20232023-12-31$8.05B$554.2M$1.16B$140.7M$0n/a
FY 20222022-12-31$7.74B$505.3M$563.3M$142.2M$100.0Mn/a
FY 20212021-12-31$5.48B$153.2M$829.1M$93.8M$0n/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2025-12-31 from the cover page.

What this page is

ICON 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 ICON (ICLR), SEC CIK 1060955, listed on Nasdaq, classified by the SEC as services-commercial physical & biological research. 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 2026-09-11.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 2026-09-17.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 2026-08-13.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
Financials
SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.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 2026-09-17.JSON and CSV
Company record
EDGAR filing index for CIK 1060955Ticker, 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.

Datasets

Frequently Asked Questions

How much of ICLR is sold short?
2,801,170 shares were held short at the 2026-09-30 settlement, 2.5 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 ICLR's daily short volume?
On 2026-10-09, 146,831 of the 397,869 ICLR shares reported to FINRA were sold short, 36.9% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ICLR have fails to deliver?
The SEC's latest file shows 709 ICLR shares failed to deliver at settlement 2026-09-11. Fails are reported per settlement date and published twice a month with a lag.
Are ICLR insiders buying or selling?
Insiders at ICLR reported 37 open-market sells worth $4.0M in the last 90 days and no open-market buys. Latest filing: Murphy Ronan Martin (Director) on 2026-09-17.
Have ICLR insiders filed to sell?
16 Form 144 notices on file for ICLR worth $8.2M at the prices reported; 12 in the last 90 days worth $4.0M. Latest: RONAN MARTIN MURPHY filed on 2026-09-17 to sell 5,005 shares ($876K) from 2026-09-17.
Who owns 5% or more of ICLR?
14 holders report 5% or more of ICLR in their latest filing, all on Schedule 13G (passive). The largest reported stake is Artisan Partners Asset Management Inc. at 10.9% of the class (8,361,303 shares), filed 2026-03-06 for an event on 2026-02-27.
What did ICLR report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) ICON reported revenue of $2.06B, up 1.2% from the same quarter a year earlier, and net income of $72.6M (0.94 diluted EPS). In FY 2025 it generated $1.04B of operating cash flow and spent $750.0M on buybacks. As of 2026-06-30, cash was $928.4M against $2.11B of debt.
Which tracked 13F managers own ICLR?
5 of the 30 tracked 13F managers held ICLR shares at their latest filing, $334.3M in all. The largest: D. E. Shaw & Co. (1.4M shares, $235.7M), Steve Cohen's Point72 Asset Management (366K shares, $63.6M), Ken Griffin's Citadel Advisors (149K shares, $25.8M), Izzy Englander's Millennium Management (48K shares, $8.4M), Renaissance Technologies (5K shares, $782K).

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