XOOMAR

BOSTON SCIENTIFIC CORP (BSX)

Every FINRA and SEC series the site collects for BOSTON SCIENTIFIC CORP: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus.

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48.2M

Short interest

settlement 2026-08-31

2.3

Days to cover

+74.4% vs prior

42.9%

Short share of volume

2026-09-17

3,497

Fails to deliver

settlement 2026-08-24

Wed 21 Oct

Next earnings

estimated; last year 2025-10-22

$9.5M

Insider flow, 90 days

6 buys, 0 sells

As of 2026-09-17.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 31 August 2026, short interest in BSX is 48,173,758 shares, up 25,897,557 shares over the last month. Over the last 48 readings it ranged from 10,449,826 shares (31 January 2025) to 57,491,117 shares (29 May 2026). At the reported average volume of 21.0M shares a day that is 2.3 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-3148,173,758+74.4%21,036,9312.29
2026-08-1427,617,554+24.0%17,642,1611.57
2026-07-3122,276,201-21.2%21,974,6001.01
2026-07-1528,281,040+1.2%16,776,8241.69
2026-06-3027,938,624-6.1%23,398,6731.19
2026-06-1529,750,309-48.3%20,617,4981.44
2026-05-2957,491,117+83.0%25,507,6302.25
2026-05-1531,423,298+9.7%17,713,8351.77
2026-04-3028,642,737+11.8%21,126,2301.36
2026-04-1525,614,558+8.9%14,196,0531.80
2026-03-3123,529,218-7.5%16,507,6321.43
2026-03-1325,441,563-3.1%12,874,9741.98
2026-02-2726,261,043-1.4%13,520,9631.94
2026-02-1326,641,433-5.8%27,986,0531.00
2026-01-3028,281,105+20.8%14,359,0241.97
2026-01-1523,415,429+17.0%10,294,6122.27
2025-12-3120,010,940+4.5%8,454,1122.37
2025-12-1519,144,680+2.2%10,117,2841.89
2025-11-2818,734,072-11.1%9,892,0431.89
2025-11-1421,076,004+8.3%7,709,8912.73
2025-10-3119,453,503-0.9%8,516,4012.28
2025-10-1519,634,328+1.2%9,665,6412.03
2025-09-3019,401,596+2.0%13,301,1101.46
2025-09-1519,015,043+0.1%8,063,2832.36

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 17 September 2026, the short share of BSX volume is 42.9%, up 1.5 points over the last five sessions. Over the last 52 readings it ranged from 19.2% (11 September 2026) to 72.0% (17 August 2026). The latest reading is 3.3 points below the 30-session average of 46.2%, on 12.4M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-175.3M12.4M42.9%49,947
2026-09-162.6M5.6M47.4%5,022
2026-09-153.2M7.8M41.4%13,649
2026-09-142.5M7.7M32.4%10,277
2026-09-112.3M11.9M19.2%2,293
2026-09-104.3M10.3M41.4%25,236
2026-09-092.9M6.5M44.9%417
2026-09-085.2M12.1M43.2%2,933
2026-09-042.5M6.7M37.8%48,702
2026-09-033.2M6.9M46.0%2,104
2026-09-022.6M6.7M38.6%8,543
2026-09-011.9M4.1M45.5%5,044
2026-08-313.3M6.3M52.7%3,708
2026-08-283.3M6.0M54.3%9,135
2026-08-273.6M7.0M50.7%16,020
2026-08-265.3M15.0M35.5%14,310
2026-08-253.4M6.9M49.9%30,538
2026-08-242.5M5.2M48.6%13,340
2026-08-213.2M6.0M53.6%4,422
2026-08-203.1M9.6M32.6%9,487
2026-08-194.4M7.9M55.1%6,957
2026-08-182.4M4.6M51.6%13,043
2026-08-174.8M6.7M72.0%447
2026-08-143.8M6.7M56.2%3,950
2026-08-133.5M5.4M64.7%6,444
2026-08-125.3M8.4M63.3%23,491
2026-08-112.9M6.5M43.7%4,640
2026-08-103.5M9.9M35.4%6,247
2026-08-072.1M4.3M48.2%2,195
2026-08-063.5M9.5M37.0%3,607

Fails to deliver

SEC, by settlement date. JSON

As of 24 August 2026, the fails-to-deliver balance in BSX is 3,497 shares, down 25,393 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (5 February 2026) to 177,348 shares (1 May 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-243,497$50.37$176K
2026-08-2028,890$52.01$1.5M
2026-08-1251$51.19$3K
2026-08-10100$49.31$5K
2026-08-041$48.43$48
2026-08-03200$46.73$9K
2026-07-2911,681$46.06$538K
2026-07-20273$44.03$12K
2026-07-1538$42.63$2K
2026-07-0613,769$45.14$622K
2026-07-022,224$43.06$96K
2026-07-0135,826$42.68$1.5M
2026-06-3014,456$43.48$629K
2026-06-2444$45.60$2K
2026-06-221,381$45.29$63K
2026-06-1876,793$44.95$3.5M
2026-06-1572$46.91$3K
2026-06-1221$47.17$991
2026-06-11520$48.34$25K
2026-06-0837,159$48.55$1.8M
2026-06-05211$48.85$10K
2026-06-0160,956$48.31$2.9M
2026-05-2912,003$49.11$589K
2026-05-26100$57.78$6K
2026-05-2226$57.15$1K
2026-05-1840$52.68$2K
2026-05-149$53.06$478
2026-05-1321,439$54.10$1.2M
2026-05-088,866$56.57$502K
2026-05-0539,690$56.85$2.3M

Insider trades

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

Insiders at BSX reported 6 open-market buys worth $9.5M in the last 90 days and no open-market sells. Clustered voluntary buying is historically the stronger insider signal because insiders buy for one reason. Latest filing: O'Connor Padraig Andrew (EVP, Global Operations) on 2026-09-02.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-02O'Connor Padraig AndrewEVP, Global OperationsTax withholding567$48.37$27K8K
2026-09-02O'Connor Padraig AndrewEVP, Global OperationsOption exercise1K$0.00$08K
2026-08-25Morano Susan En/aBuy2K$49.22$100K14K
2026-08-11Woodworth EmilySVP, Global Controller and CAOI3K$51.19$150K3K
2026-08-10Monson JonathanEVP and CFOI10K$50.46$500K10K
2026-08-05Habiger David Cn/aBuy2K$47.59$100K17K
2026-08-04Habiger David Cn/aBuy140$48.59$7K15K
2026-08-03Habiger David Cn/aBuy1K$48.07$50K15K
2026-08-03Mahoney Michael FChairman, President & CEOI22K$48.43$1.1M22K
2026-08-03Mahoney Michael FChairman, President & CEOBuy186K$48.33$9.0M1.6M
2026-07-31LUDWIG EDWARD Jn/aBuy5K$45.48$227K30K
2026-07-31Fitzgerald Joseph MichaelEVP & Group Pres, CardiologyI64K$46.73$3.0M64K
2026-05-28Mahoney Michael FChairman, President & CEOGift387K$0.00$00
2026-05-20Pegus Cheryln/aBuy2K$56.49$100K2K
2026-05-20LUDWIG EDWARD Jn/aBuy4K$56.68$203K25K
2026-05-20Habiger David Cn/aBuy2K$55.92$126K14K
2026-05-19Habiger David Cn/aBuy2K$56.95$125K12K
2026-05-07Zane Ellen Mn/aGrant4K$0.00$028K
2026-05-07WICHMANN DAVID Sn/aGrant4K$0.00$045K
2026-05-07Weber Christophe Pierren/aGrant1K$0.00$04K
2026-05-07Weber Christophe Pierren/aGrant2K$0.00$03K
2026-05-07Morano Susan En/aGrant1K$0.00$012K
2026-05-07Morano Susan En/aGrant4K$0.00$010K
2026-05-07Mega Jessica Ln/aGrant4K$0.00$012K
2026-05-07LUDWIG EDWARD Jn/aGrant4K$0.00$022K
2026-05-07Habiger David Cn/aGrant4K$0.00$09K
2026-05-02O'Connor Padraig AndrewEVP, Global OperationsTax withholding872$56.50$49K7K
2026-05-02O'Connor Padraig AndrewEVP, Global OperationsOption exercise2K$0.00$08K
2026-05-02Butcher Arthur CEVP& Grp Pres, MedSurg & APACTax withholding1K$56.50$57K57K
2026-05-02Butcher Arthur CEVP& Grp Pres, MedSurg & APACOption exercise2K$0.00$058K
2026-03-02Morano Susan En/aGrant24$0.00$07K
2026-03-02Weber Christophe Pierren/aGrant323$0.00$0879
2026-03-02Weber Christophe Pierren/aGrant556$0.00$0556
2026-03-01Woodworth EmilySVP, Global Controller and CAOTax withholding372$76.85$29K3K
2026-03-01Woodworth EmilySVP, Global Controller and CAOOption exercise838$0.00$03K
2026-02-19Butcher Arthur CEVP& Grp Pres, MedSurg & APACI7K$75.76$519K20K
2026-02-16Woodworth EmilySVP, Global Controller and CAOTax withholding283$74.73$21K2K
2026-02-16Woodworth EmilySVP, Global Controller and CAOOption exercise637$0.00$03K
2026-02-16O'Sullivan MiriamSVP, Chief HR OfficerTax withholding291$74.73$22K17K
2026-02-16O'Sullivan MiriamSVP, Chief HR OfficerOption exercise990$0.00$018K
2026-02-16O'Connor Padraig AndrewEVP, Global OperationsTax withholding339$74.73$25K6K
2026-02-16O'Connor Padraig AndrewEVP, Global OperationsOption exercise905$0.00$06K
2026-02-16Monson JonathanEVP and CFOTax withholding440$74.73$33K38K
2026-02-16Monson JonathanEVP and CFOOption exercise990$0.00$038K
2026-02-16Mahoney Michael FChairman, President & CEOTax withholding8K$74.73$588K1.6M
2026-02-16Mahoney Michael FChairman, President & CEOOption exercise16K$0.00$01.6M
2026-02-16Fitzgerald Joseph MichaelEVP & Group Pres, CardiologyTax withholding2K$74.73$135K214K
2026-02-16Fitzgerald Joseph MichaelEVP & Group Pres, CardiologyOption exercise4K$0.00$0216K
2026-02-16Butcher Arthur CEVP& Grp Pres, MedSurg & APACTax withholding1K$74.73$92K56K
2026-02-16Butcher Arthur CEVP& Grp Pres, MedSurg & APACOption exercise3K$0.00$057K

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 the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

7 Form 144 notices on file for BSX worth $28.3M at the prices reported; 0 in the last 90 days worth $0. Latest: MICHAEL F MAHONEY filed on 2026-02-02 to sell 160,901 shares ($15.0M) from 2026-02-02.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-02-02MICHAEL F MAHONEYOfficer, Director161K$15.0M0.011%2026-02-02Morgan Stanley Smith Barney LLC Executive Financial Services
2025-12-01ARTHUR C BUTCHEROfficer17K$1.8M0.001%2025-12-01Morgan Stanley Smith Barney LLC Executive Financial Services
2025-11-06Zane Ellen MDirector3K$284K0.000%2025-11-06Wells Fargo Clearing Services
2025-11-03JOSEPH M FITZGERALDOfficer50K$5.0M0.003%2025-11-03Morgan Stanley Smith Barney LLC Executive Financial Services
2025-10-28Zane Ellen MDirector3K$297K0.000%2025-10-28Wells Fargo Clearing Services
2025-10-27Zane Ellen MDirector10K$1.0M0.001%2025-10-27Wells Fargo Clearing Services
2025-10-01JOSEPH M FITZGERALDOfficer50K$4.9M0.003%2025-10-01Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

4 holders above 5% have filed on BSX, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (111,127,205 shares), filed 2026-04-29 for an event on 2026-03-31.

FiledFormHolderSharesOf classEvent
2026-08-0613G/Ano. 6FMR LLCparent holding company46.4M3.1%2026-06-30
2026-08-0613G/Ano. 6Abigail P. Johnsonindividual46.4M3.1%2026-06-30
2026-05-0613G/Ano. 5FMR LLCparent holding company75.8M5.1%2026-03-31
2026-05-0613G/Ano. 5Abigail P. Johnsonindividual75.8M5.1%2026-03-31
2026-04-2913GVanguard Capital Managementinvestment adviser111.1M7.5%2026-03-31
2026-03-2613G/Ano. 11The Vanguard Groupinvestment adviser00.0%2026-03-13

13F holders

Tracked managers holding BSX at their latest 13F. JSON

9 of the 30 tracked managers held BSX at their latest 13F, $3.24B in total at quarter-end prices. D. E. Shaw & Co. is the largest at $1.16B (0.6% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 3 cut.

FundQuarterSharesValueOf portfolioChange in shares
D. E. Shaw & Co.2026-06-3027.3M$1.16B0.55%+2.8M
Two Sigma Investments2026-06-3019.4M$828.9M0.60%+10.0M
Citadel Advisors2026-06-3010.2M$433.4M0.05%+3.4M
AQR Capital Management2026-06-309.7M$413.2M0.14%+4.4M
Millennium Management2026-06-305.9M$232.1M0.08%+603K
Renaissance Technologies2026-06-302.4M$102.9M0.14%-740K
Point72 Asset Management2026-06-30877K$37.4M0.04%-5.0M
Bridgewater Associates2026-06-30442K$18.9M0.08%+365K
Fisher Asset Management2026-06-30334K$14.2M0.00%-117K

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 2026 (quarter ended 2026-06-30) BOSTON SCIENTIFIC CORP reported revenue of $5.44B, up 7.5% from the same quarter a year earlier (0.61 diluted EPS). In FY 2025 it generated $4.53B of operating cash flow. As of 2026-06-30, cash was $539.0M against $1.71B of debt.

Cash
$539.0M
Debt
$1.71B
Equity
$24.93B
Total assets
$45.22B
Shares outstanding
1,449,229,526

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$5.44Bn/an/a0.61
Q1 20262026-03-31$5.20Bn/an/a0.90
Q4 2025derived2025-12-31$5.29Bn/an/an/a
Q3 20252025-09-30$5.07Bn/an/a0.51
Q2 20252025-06-30$5.06Bn/an/a0.53
Q1 20252025-03-31$4.66Bn/an/a0.45
Q4 2024derived2024-12-31$4.56Bn/an/an/a
Q3 20242024-09-30$4.21Bn/an/a0.32

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$20.07Bn/a$4.53B$876.0Mn/an/a
FY 20242024-12-31$16.75Bn/a$3.44B$790.0Mn/a$0
FY 20232023-12-31$14.24Bn/a$2.50B$711.0Mn/a$28.0M
FY 20222022-12-31$12.68Bn/a$1.53B$588.0M$0$55.0M
FY 20212021-12-31$11.89Bn/a$1.87B$554.0M$0$55.0M

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 cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-30 from the cover page.

What this page is

BOSTON SCIENTIFIC CORP 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows BOSTON SCIENTIFIC CORP (BSX), SEC CIK 885725, listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-17.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-24.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-02-02.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-06.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K Item 2.02 (full-text search)EDGAR full-text search read twice a day; the estimate is last year's date plus 52 weeks. Latest 2026-07-29.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-02.JSON and CSV
Company record
EDGAR filing index for CIK 885725Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 18 Sep 05:40 UTC.

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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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 BSX is sold short?
48,173,758 shares were held short at the 2026-08-31 settlement, 2.3 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 BSX's daily short volume?
On 2026-09-17, 5,336,294 of the 12,438,479 BSX shares reported to FINRA were sold short, 42.9% of the day's reported volume. Short volume is a flow for one day, not a position.
Does BSX have fails to deliver?
The SEC's latest file shows 3,497 BSX shares failed to deliver at settlement 2026-08-24. Fails are reported per settlement date and published twice a month with a lag.
Are BSX insiders buying or selling?
Insiders at BSX reported 6 open-market buys worth $9.5M in the last 90 days and no open-market sells. Clustered voluntary buying is historically the stronger insider signal because insiders buy for one reason. Latest filing: O'Connor Padraig Andrew (EVP, Global Operations) on 2026-09-02.
Have BSX insiders filed to sell?
7 Form 144 notices on file for BSX worth $28.3M at the prices reported; 0 in the last 90 days worth $0. Latest: MICHAEL F MAHONEY filed on 2026-02-02 to sell 160,901 shares ($15.0M) from 2026-02-02.
Who owns more than 5% of BSX?
4 holders above 5% have filed on BSX, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (111,127,205 shares), filed 2026-04-29 for an event on 2026-03-31.
What did BSX report last quarter?
In Q2 2026 (quarter ended 2026-06-30) BOSTON SCIENTIFIC CORP reported revenue of $5.44B, up 7.5% from the same quarter a year earlier (0.61 diluted EPS). In FY 2025 it generated $4.53B of operating cash flow. As of 2026-06-30, cash was $539.0M against $1.71B of debt.
Which funds hold BSX?
9 of the 30 tracked managers held BSX at their latest 13F, $3.24B in total at quarter-end prices. D. E. Shaw & Co. is the largest at $1.16B (0.6% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 3 cut.

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