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Biodesix (BDSX)

Biodesix on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as services-medical laboratories.

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202K

Short interest

settlement 2026-09-30

1.8

Days to cover

-1.4 days vs prior

40.0%

Short share of volume

2026-10-09

4,323

Fails to deliver

settlement 2026-09-11

Mon 2 Nov

Next earnings

estimated date

$1.0M

Insider flow, 90 days

3 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 BDSX is 201,849 shares, down 18,534 shares over the last month. Over the last 48 readings it ranged from 75,405 shares (28 November 2025) to 5,633,530 shares (30 May 2025). The latest reading sits at the bottom of that range. At the reported average volume of 110K shares a day that is 1.8 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-30201,849-5.7%109,8411.84
2026-09-15214,006-2.9%64,9933.29
2026-08-31220,383+46.8%166,0581.33
2026-08-14150,085-4.5%94,8161.58
2026-07-31157,187-6.4%58,6742.68
2026-07-15167,970+59.3%76,5332.19
2026-06-30105,427+0.7%125,4901.00
2026-06-15104,666-1.7%39,9192.62
2026-05-29106,463-22.4%46,9232.27
2026-05-15137,196-7.3%101,6311.35
2026-04-30148,012-14.9%58,5242.53
2026-04-15174,016-4.3%55,5993.13
2026-03-31181,818+1.5%76,6792.37
2026-03-13179,099-19.4%176,7801.01
2026-02-27222,245-7.0%127,3801.74
2026-02-13239,064-4.2%130,4631.83
2026-01-30249,443-48.4%419,3321.00
2026-01-15483,591+499.1%7,865,7561.00
2025-12-3180,722-2.8%68,4721.18
2025-12-1583,042+10.1%63,1091.32
2025-11-2875,405-43.5%56,0441.35
2025-11-14133,547-29.1%116,1071.15
2025-10-31188,388+92.9%437,4781.00
2025-10-1597,662-39.5%39,0272.50

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of BDSX volume is 40.0%, down 1.2 points over the last five sessions. Over the last 30 readings it ranged from 23.4% (30 September 2026) to 70.3% (23 September 2026). The latest reading is 5.4 points below the 30-session average of 45.4%, on 22K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-099K22K40.0%0
2026-10-0819K50K38.9%0
2026-10-0714K27K50.5%0
2026-10-0629K50K57.2%0
2026-10-0536K73K49.1%0
2026-10-0226K62K41.2%1,594
2026-10-0132K102K31.0%2,725
2026-09-3021K88K23.4%0
2026-09-2920K68K30.2%102
2026-09-2842K101K41.7%0
2026-09-2519K62K31.1%0
2026-09-2421K62K34.1%0
2026-09-2316K23K70.3%0
2026-09-229K24K38.6%0
2026-09-2120K57K35.3%16
2026-09-1821K40K51.4%0
2026-09-179K21K42.4%0
2026-09-1626K40K63.8%0
2026-09-1518K29K59.7%0
2026-09-1411K20K54.5%0
2026-09-1113K24K56.8%41
2026-09-109K26K36.5%0
2026-09-098K14K59.4%0
2026-09-0823K45K50.6%0
2026-09-0413K23K55.2%0
2026-09-0311K23K48.6%0
2026-09-0227K60K45.9%0
2026-09-0113K28K45.5%475
2026-08-3111K24K47.2%0
2026-08-2815K49K30.5%0

Fails to deliver

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

As of 11 September 2026, the fails-to-deliver balance in BDSX is 4,323 shares, up 4,130 shares over the last settlement date. Over the last 30 readings it ranged from 13 shares (24 July 2026) to 110,520 shares (24 August 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-114,323$26.04$113K
2026-09-03193$27.16$5K
2026-09-011,715$26.35$45K
2026-08-311,710$26.83$46K
2026-08-24110,520$26.63$2.9M
2026-08-044,426$22.03$98K
2026-07-2413$22.32$290
2026-07-231,622$21.39$35K
2026-07-06176$21.99$4K
2026-07-022,591$24.50$63K
2026-07-012,358$22.55$53K
2026-06-30822$23.81$20K
2026-06-293,311$23.34$77K
2026-06-24646$19.16$12K
2026-06-221,959$16.81$33K
2026-05-22388$15.18$6K
2026-05-181,649$14.17$23K
2026-05-11994$15.32$15K
2026-05-07536$15.00$8K
2026-05-052,538$11.27$29K
2026-05-042,689$11.08$30K
2026-05-015,971$10.98$66K
2026-04-28405$10.13$4K
2026-04-091,968$14.25$28K
2026-04-0710,140$15.36$156K
2026-04-022,217$14.76$33K
2026-03-18151$16.59$3K
2026-03-12348$19.07$7K
2026-03-106,152$19.40$119K
2026-03-094,691$18.78$88K

Insider trades

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

Insiders at BDSX reported 3 open-market buys worth $1.0M in the last 90 days and no open-market sells. Latest filing: PATIENCE JOHN (Director, Chairman) on 2026-09-30.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-30PATIENCE JOHNDirector, ChairmanOption exercise1Kprice not stated in the filingnot stated27K
2026-08-12SCHULER JACK W10% owner, Emeritus DirectorBuy15K$24.47$367K556K
2026-08-11SCHULER JACK W10% owner, Emeritus DirectorBuy14K$24.01$329K541K
2026-08-10SCHULER JACK W10% owner, Emeritus DirectorBuy14K$24.25$337K527K
2026-06-30PATIENCE JOHNDirector, ChairmanOption exercise1Kprice not stated in the filingnot stated25K
2026-03-31PATIENCE JOHNDirector,OtherOption exercise1Kprice not stated in the filingnot stated24K
2026-02-23Cowie Robin HarperCFO, Sec'y & TreasurerSell535$12.78$7K16K
2026-02-23O'Kane KieranChief Commercial OfficerSell535$12.78$7K10K
2026-02-23Pestano Gary AnthonyChief Development OfficerSell556$12.78$7K10K
2026-02-23Vazquez ChrisChief Accounting OfficerSell211$12.78$3K2K
2026-02-23Hutton ScottPresident & CEOSell1K$12.78$19K49K
2026-02-20O'Kane KieranChief Commercial OfficerOption exercise1Kprice not stated in the filingnot stated10K
2026-02-20Pestano Gary AnthonyChief Development OfficerOption exercise2Kprice not stated in the filingnot stated11K
2026-02-20Cowie Robin HarperCFO, Sec'y & TreasurerOption exercise1Kprice not stated in the filingnot stated17K
2026-02-20Hutton ScottPresident & CEOOption exercise5Kprice not stated in the filingnot stated50K
2026-02-20Vazquez ChrisChief Accounting OfficerOption exercise563price not stated in the filingnot stated2K
2026-02-10Cowie Robin HarperCFO, Sec'y & TreasurerSell941$10.08$9K15K
2026-02-10Pestano Gary AnthonyChief Development OfficerSell540$10.08$5K9K
2026-02-10O'Kane KieranChief Commercial OfficerSell584$10.08$6K9K
2026-02-10Hutton ScottPresident & CEOSell4K$10.08$36K45K
2026-02-10Vazquez ChrisChief Accounting OfficerSell101$10.08$1K1K
2026-02-09Cowie Robin HarperCFO, Sec'y & TreasurerOption exercise3Kprice not stated in the filingnot stated16K
2026-02-09Pestano Gary AnthonyChief Development OfficerOption exercise1Kprice not stated in the filingnot stated10K
2026-02-09O'Kane KieranChief Commercial OfficerOption exercise2Kprice not stated in the filingnot stated9K
2026-02-09Hutton ScottPresident & CEOOption exercise10Kprice not stated in the filingnot stated49K
2026-02-09Vazquez ChrisChief Accounting OfficerOption exercise263price not stated in the filingnot stated1K
2026-01-26SCHULER JACK W10% owner, Emeritus DirectorBuy20K$11.80$236K1.6M
2026-01-23SCHULER JACK W10% owner, Emeritus DirectorBuy80K$11.81$945K1.5M
2026-01-22SCHULER JACK W10% owner, Emeritus DirectorBuy82K$10.96$904K1.5M
2026-01-16Cowie Robin HarperCFO, Sec'y & TreasurerSell298$8.15$2K14K
2026-01-16Hutton ScottPresident & CEOSell970$8.15$8K39K
2026-01-16O'Kane KieranChief Commercial OfficerSell298$8.15$2K8K
2026-01-16Pestano Gary AnthonyChief Development OfficerSell298$8.15$2K8K
2026-01-16Vazquez ChrisChief Accounting OfficerSell83$8.15$6761K
2026-01-15Cowie Robin HarperCFO, Sec'y & TreasurerOption exercise805price not stated in the filingnot stated14K
2026-01-15Hutton ScottPresident & CEOOption exercise3Kprice not stated in the filingnot stated40K
2026-01-15O'Kane KieranChief Commercial OfficerOption exercise805price not stated in the filingnot stated8K
2026-01-15Pestano Gary AnthonyChief Development OfficerOption exercise805price not stated in the filingnot stated9K
2026-01-15Vazquez ChrisChief Accounting OfficerOption exercise219price not stated in the filingnot stated1K
2026-01-05PATIENCE JOHNDirector,OtherOption exercise1Kprice not stated in the filingnot stated23K
2025-11-10Cowie Robin HarperCFO, Sec'y & TreasurerSell50$7.62$38113K
2025-11-10Cowie Robin HarperCFO, Sec'y & TreasurerOption exercise158price not stated in the filingnot stated13K
2025-11-10Hutton ScottPresident & CEOSell189$7.62$1K37K
2025-11-10Hutton ScottPresident & CEOOption exercise611price not stated in the filingnot stated38K
2025-11-10O'Kane KieranChief Commercial OfficerSell25$7.62$1917K
2025-11-10O'Kane KieranChief Commercial OfficerOption exercise75price not stated in the filingnot stated7K
2025-11-10Pestano Gary AnthonyChief Development OfficerOption exercise69price not stated in the filingnot stated8K
2025-11-10Pestano Gary AnthonyChief Development OfficerSell23$7.62$1758K
2025-11-10Vazquez ChrisChief Accounting OfficerOption exercise31price not stated in the filingnot stated949
2025-11-10Vazquez ChrisChief Accounting OfficerSell13$7.62$99936

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 BDSX worth $19K at the prices reported; 0 in the last 90 days worth $0. Latest: Hutton Scott filed on 2026-02-23 to sell 1,490 shares ($19K) from 2026-02-23.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-02-23Hutton ScottOfficer, Director1K$19K0.019%2026-02-23Morgan Stanley Smith Barney LLC

Large holders (13D and 13G)

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

14 holders report 5% or more of BDSX in their latest filing, 3 on Schedule 13D (active intent). The largest reported stake is SCHULER JACK W at 24.0% of the class (2,333,945 shares), filed 2026-01-27 for an event on 2026-01-23.

FiledFormHolderSharesOf classEvent
2026-06-1813GGuy Levyindividual525K5.1%2026-06-17
2026-06-1813GSoleus GP, LLCother entity525K5.1%2026-06-17
2026-06-1813GSoleus Capital Management, L.P.partnership525K5.1%2026-06-17
2026-06-1813GSoleus Capital Group, LLCother entity525K5.1%2026-06-17
2026-06-1813GSoleus Capital, LLCother entity525K5.1%2026-06-17
2026-06-1813GSoleus Capital Master Fund, L.P.non-US institution525K5.1%2026-06-17
2026-05-1513G/Ano. 1Perceptive Credit Advisors LLCinvestment adviser484K4.6%2026-03-31
2026-05-1513G/Ano. 1Joseph Edelmanindividual484K4.6%2026-03-31
2026-05-1513G/Ano. 1Perceptive Advisors LLCinvestment adviser484K4.6%2026-03-31
2026-05-1513G/Ano. 1Perceptive Credit Holdings IV, LPpartnership432K4.1%2026-03-31
2026-05-1513G/Ano. 1PCOF EQ AIV IV, LPpartnership52K0.5%2026-03-31
2026-04-2813GOrin Hirschmanparent holding company, individual758K7.7%2026-03-31
2026-04-2813GAIGH Capital Management LLCinvestment adviser, other entity758K7.7%2026-03-31
2026-01-2713D/Ano. 10SCHULER JACK Windividual2.3M24.0%2026-01-23
2026-01-2713D/Ano. 10Jack W. Schuler Living Trustother entity1.6M16.1%2026-01-23
2026-01-2713D/Ano. 10Jack W. Schuler 2025 GRATother entity750K7.7%2026-01-23
2026-01-2613GTelemark Asset Management, LLCinvestment adviser, other entity428K5.4%2026-01-22
2026-01-2613GTelemark Fund, LPpartnership428K5.4%2026-01-22
2026-01-2613GColin S. McNayindividual428K5.4%2026-01-22

13F holders

Tracked managers holding BDSX at their latest 13F. JSON

3 of the 30 tracked managers held BDSX at their latest 13F, $2.9M in total at quarter-end prices. Two Sigma Investments is the largest at $2.0M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Two Sigma Investments2026-06-3087K$2.0M0.00%+42K
Renaissance Technologies2026-06-3029K$646K0.00%+17K
Millennium Management2026-06-3014K$325K0.00%-10K

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

Biodesix 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 Biodesix (BDSX), SEC CIK 1439725, listed on Nasdaq, classified by the SEC as services-medical laboratories. 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 2026-02-23.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 2026-06-18.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 2026-05-04.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 2026-09-30.JSON and CSV
Company record
EDGAR filing index for CIK 1439725Ticker, 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-medical laboratories

Other company pages

Datasets

Frequently Asked Questions

How much of BDSX is sold short?
201,849 shares were held short at the 2026-09-30 settlement, 1.8 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 BDSX's daily short volume?
On 2026-10-09, 8,828 of the 22,100 BDSX shares reported to FINRA were sold short, 40.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does BDSX have fails to deliver?
The SEC's latest file shows 4,323 BDSX shares failed to deliver at settlement 2026-09-11. Fails are reported per settlement date and published twice a month with a lag.
Are BDSX insiders buying or selling?
Insiders at BDSX reported 3 open-market buys worth $1.0M in the last 90 days and no open-market sells. Latest filing: PATIENCE JOHN (Director, Chairman) on 2026-09-30.
Have BDSX insiders filed to sell?
1 Form 144 notice on file for BDSX worth $19K at the prices reported; 0 in the last 90 days worth $0. Latest: Hutton Scott filed on 2026-02-23 to sell 1,490 shares ($19K) from 2026-02-23.
Who owns 5% or more of BDSX?
14 holders report 5% or more of BDSX in their latest filing, 3 on Schedule 13D (active intent). The largest reported stake is SCHULER JACK W at 24.0% of the class (2,333,945 shares), filed 2026-01-27 for an event on 2026-01-23.
Which tracked 13F managers own BDSX?
3 of the 30 tracked 13F managers held BDSX shares at their latest filing, $2.9M in all. The largest: Two Sigma Investments (87K shares, $2.0M), Renaissance Technologies (29K shares, $646K), Izzy Englander's Millennium Management (14K shares, $325K).

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