XOOMAR

SeaStar Medical Holding (ICU)

SeaStar Medical Holding on one page: short interest, daily short volume, fails to deliver, large holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus.

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186K

Short interest

settlement 2026-10-15

1.0

Days to cover

-2.2 days vs prior

57.0%

Short share of volume

2026-11-03

44,694

Fails to deliver

settlement 2026-10-09

Thu 12 Nov

Next earnings

estimated date

$2K

Insider flow, 90 days

1 buys, 0 sells

As of 2026-11-03.

Short interest

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

As of 15 October 2026, short interest in ICU is 185,839 shares, up 64,153 shares over the last month. Over the last 48 readings it ranged from 79,633 shares (13 June 2025) to 5,115,929 shares (30 September 2025). The latest reading sits at the bottom of that range. At the reported average volume of 360K shares a day that is 1.0 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-10-15185,839+29.3%359,9561.00
2026-09-30143,724+18.1%45,4873.16
2026-09-15121,686+10.0%44,6282.73
2026-08-31110,622-9.1%47,5782.33
2026-08-14121,687+33.5%92,0261.32
2026-07-3191,177-34.4%60,4361.51
2026-07-15138,925+69.6%149,7551.00
2026-06-3081,907-36.7%74,9071.09
2026-06-15129,310-8.5%102,1501.27
2026-05-29141,315-8.8%68,4812.06
2026-05-15154,907-28.9%89,1141.74
2026-04-30217,777+36.6%90,1842.41
2026-04-15159,384-25.9%170,8851.00
2026-03-31215,212+28.1%318,7751.00
2026-03-13167,946-28.0%57,6282.91
2026-02-27233,272-18.5%43,3365.38
2026-02-13286,335+85.5%108,9782.63
2026-01-30154,400+13.1%110,9261.39
2026-01-15136,473-86.3%182,3741.00
2025-12-31996,651-1.4%1,258,8761.00
2025-12-151,010,331-67.1%1,603,3181.00
2025-11-283,074,030+669.1%5,307,4201.00
2025-11-14399,709-35.2%877,5631.00
2025-10-31616,671-73.5%1,016,5301.00
2025-10-152,326,990-54.5%2,366,8171.00
2025-09-305,115,929+14.4%5,103,7541.00
2025-09-154,471,307+42.9%1,072,3674.17
2025-08-293,128,638+95.9%1,073,6902.91
2025-08-151,597,304-22.9%1,906,5351.00
2025-07-312,071,239+259.7%5,480,5501.00
2025-07-15575,798-80.5%6,861,8501.00
2025-06-302,945,797+3599.2%31,797,9741.00
2025-06-1379,633-46.0%141,9571.00
2025-05-30147,443+29.6%150,8061.00
2025-05-15113,798-59.7%140,7391.00
2025-04-30282,268-35.4%91,3653.09
2025-04-15437,149-18.6%228,2851.91
2025-03-31536,873+60.3%257,7492.08
2025-03-14334,920-6.3%157,5102.13
2025-02-28357,619+18.8%150,0812.38
2025-02-14300,913-18.7%799,8731.00
2025-01-31370,190-11.2%799,3551.00
2025-01-15416,651+11.1%232,9341.79
2024-12-31375,148-27.6%189,9781.97
2024-12-13518,241+53.3%402,0931.29
2024-11-29338,102+0.3%201,3931.68
2024-11-15337,056+17.0%364,1471.00
2024-10-31288,068+38.0%87,5653.29

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 3 November 2026, the short share of ICU volume is 57.0%, up 15.2 points over the last five sessions. Over the last 30 readings it ranged from 19.3% (25 September 2026) to 89.8% (29 September 2026). The latest reading is 4.3 points above the 30-session average of 52.7%, on 509K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-11-03290K509K57.0%49,005
2026-11-0212K43K27.0%50
2026-10-3015K40K37.9%0
2026-10-2937K69K53.6%100
2026-10-286K17K37.7%0
2026-10-2719K46K41.8%0
2026-10-2635K64K54.3%8,104
2026-10-2389K211K42.0%20,838
2026-10-2260K172K34.8%2,024
2026-10-2128K43K65.5%0
2026-10-2044K58K75.7%0
2026-10-1931K69K44.8%0
2026-10-1638K78K48.7%500
2026-10-15103K160K64.4%34,325
2026-10-14158K319K49.5%31,333
2026-10-1341K76K54.0%200
2026-10-1237K68K53.8%0
2026-10-0919K48K40.2%2,839
2026-10-0867K105K64.2%6,850
2026-10-07365K637K57.3%55,738
2026-10-0691K163K55.9%17,507
2026-10-05148K300K49.2%15,397
2026-10-02262K362K72.2%93
2026-10-016K11K54.2%0
2026-09-3028K48K59.3%0
2026-09-2980K89K89.8%0
2026-09-286K7K76.0%0
2026-09-254K18K19.3%0
2026-09-242K9K24.6%0
2026-09-236K8K75.5%0

Fails to deliver

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

As of 9 October 2026, the fails-to-deliver balance in ICU is 44,694 shares, down 107,276 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (24 August 2026) to 151,970 shares (8 October 2026).

SettlementShares failedPriceValue
2026-10-0944,694$3.49$156K
2026-10-08151,970$3.72$565K
2026-10-0730,068$3.19$96K
2026-10-06140,500$3.55$499K
2026-10-05360$4.69$2K
2026-10-021,379$3.75$5K
2026-10-01247$3.94$973
2026-09-181,786$3.48$6K
2026-09-08443$2.95$1K
2026-08-241$3.35$3
2026-08-201,360$3.27$4K
2026-08-131,834$3.36$6K
2026-07-172,035$4.22$9K
2026-07-06248$4.92$1K
2026-07-02299$4.86$1K
2026-06-241,220$3.47$4K
2026-06-233,970$3.24$13K
2026-06-222,107$3.12$7K
2026-06-17545$3.04$2K
2026-06-151,373$2.98$4K
2026-06-0531,190$3.13$98K
2026-06-0434,102$3.28$112K
2026-06-0344,317$3.53$156K
2026-06-021,498$3.64$5K
2026-06-011,782$3.71$7K
2026-05-283,729$3.59$13K
2026-05-272,772$3.58$10K
2026-05-13820$4.84$4K
2026-05-0863$4.86$306
2026-05-053$4.33$13

Insider trades

SEC Form 4, newest first. JSON

Insiders at ICU reported 1 open-market buy worth $2K in the last 90 days and no open-market sells. Latest filing: Messinger Michael (Chief Financial Officer) on 2026-08-18.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-18Messinger MichaelChief Financial OfficerBuy750$3.27$2K3K
2026-07-01Vincent Bernadette NDirectorGrant4K$0.00$08K
2026-07-01Van Heel KennethDirectorGrant4K$0.00$012K
2026-07-01Schlorff EricChief Executive OfficerGrant10K$0.00$050K
2026-07-01Neuman JohnDirectorGrant4K$0.00$016K
2026-07-01Chung KevinChief Medical OfficerGrant7K$0.00$028K
2026-07-01Baird Jennifer ADirectorGrant4K$0.00$011K
2026-02-06Van Heel KennethDirectorGrant3K$0.00$08K
2026-02-06Vincent Bernadette NDirectorGrant3K$0.00$04K
2026-02-06Towne Bradford KPrincipal Accounting OfficerGrant8K$0.00$09K
2026-02-06Schlorff EricChief Executive OfficerGrant30K$0.00$040K
2026-02-06Neuman JohnDirectorGrant3K$0.00$012K
2026-02-06Chung KevinChief Medical OfficerGrant15K$0.00$021K
2026-02-06Baird Jennifer ADirectorGrant3K$0.00$07K
2025-12-19Baird Jennifer ADirectorBuy4K$0.24$98736K
2025-12-09Messinger MichaelChief Financial OfficerBuy15K$0.35$5K18K
2025-08-27Van Heel KennethDirectorBuy10K$0.86$9K49K
2025-08-26Van Heel KennethDirectorBuy25K$0.89$22K39K
2025-08-22Chung KevinChief Medical OfficerBuy10K$0.80$8K58K
2025-07-10Vincent Bernadette NDirectorGrant4K$0.00$012K
2025-07-10Van Heel KennethDirectorGrant4K$0.00$014K
2025-07-10Neuman JohnDirectorGrant4K$0.00$092K
2025-07-10Baird Jennifer ADirectorGrant4K$0.00$032K
2025-07-01Schlorff EricChief Executive OfficerExercise or conversion22K$0.00$099K
2025-07-01Chung KevinChief Medical OfficerExercise or conversion5K$0.00$048K
2025-06-30Baird Jennifer ADirectorBuy10K$0.42$4K28K
2025-06-24Neuman JohnDirectorBuy40K$0.36$14K80K
2025-06-04Baird Jennifer ADirectorExercise or conversion3K$0.00$018K
2025-06-04Vincent Bernadette NDirectorExercise or conversion3K$0.00$08K
2025-06-04Van Heel KennethDirectorExercise or conversion4K$0.00$010K
2025-06-04Neuman JohnDirectorExercise or conversion3K$0.00$088K
2025-05-20Chung KevinChief Medical OfficerBuy5K$1.25$6K18K
2025-05-20Baird Jennifer ADirectorBuy10K$1.28$13K10K
2024-12-11Neuman JohnDirectorBuy10K$2.04$20K40K
2024-11-18Chung KevinChief Medical OfficerBuy4K$1.99$8K14K
2024-09-30Chung KevinChief Medical OfficerBuy1K$4.26$4K9K
2024-08-30Green David AChief Financial OfficerGrant8K$0.00$010K
2024-08-15Neuman JohnDirectorBuy10K$5.24$52K30K
2024-06-17Neuman JohnDirectorBuy10K$4.35$44K20K
2024-06-14Neuman JohnDirectorBuy10K$3.69$37K10K
2024-04-18Green David AChief Financial OfficerGrant2K$0.00$02K
2024-04-12Rodgers Bruce M.DirectorGrant37K$0.00$045K
2024-04-12Collins AllanDirectorGrant38K$0.00$054K
2024-04-12Van Heel KennethDirectorGrant44K$0.00$0160K
2024-04-12Barnett RickDirectorGrant70K$0.00$087K
2024-04-12Lobo AndresDirectorGrant32K$0.00$040K
2024-04-12Russell Richard D.DirectorGrant32K$0.00$060K
2024-04-12Green David AChief Financial OfficerGrant753K$0.00$0753K
2023-11-29Baron CarylInterim CFOGrant20K$0.00$0140K
2023-11-29Chung KevinChief Medical OfficerGrant63K$0.00$0211K
2023-11-29Schlorff EricChief Executive OfficerGrant60K$0.00$0838K
2023-11-22Van Heel KennethDirectorBuy100K$0.40$40K116K
2023-09-22Baron CarylInterim CFOOther transaction15K$0.00$0120K
2023-09-15Schlorff EricChief Executive OfficerGrant41K$0.00$0780K
2023-09-15Chung KevinChief Medical OfficerGrant34K$0.00$0154K
2023-09-15Baron CarylInterim CFOGrant4K$0.00$0105K
2023-08-31Schlorff EricChief Executive OfficerGrant34K$0.00$0736K
2023-08-31Chung KevinChief Medical OfficerGrant28K$0.00$0113K
2023-08-31Baron CarylInterim CFOGrant3K$0.00$0100K
2023-08-31Schlorff EricChief Executive OfficerGrant35K$0.00$0739K
2023-08-31Chung KevinChief Medical OfficerGrant35K$0.00$0120K
2023-08-15Schlorff EricChief Executive OfficerGrant20K$0.00$0702K
2023-08-15Baron CarylInterim CFOGrant2K$0.00$097K
2023-08-15Schlorff EricChief Executive OfficerGrant21K$0.00$0704K
2023-08-15Chung KevinChief Medical OfficerGrant17K$0.00$085K
2023-06-23Schlorff EricChief Executive OfficerGrant417K$0.00$0682K
2023-06-09Baron CarylInterim CFOGrant57K$0.00$0110K
2023-06-09Baron CarylInterim CFOTax withholding15K$0.53$8K95K
2023-05-30Chung KevinChief Medical OfficerBuy1K$0.48$55268K
2023-05-30Chung KevinChief Medical OfficerBuy2K$0.48$1K67K
2023-05-30Chung KevinChief Medical OfficerBuy4K$0.48$2K65K
2023-05-30Chung KevinChief Medical OfficerBuy5K$0.47$2K61K
2023-05-25Russell Richard D.DirectorBuy20K$0.50$10K28K
2023-05-18Chung KevinChief Medical OfficerBuy8K$0.70$5K56K
2023-04-06Russell Richard D.DirectorGrant8K$0.00$08K
2023-04-06Lobo AndresDirectorGrant8K$0.00$08K
2023-04-06Barnett RickDirectorGrant8K$0.00$016K
2023-04-06Van Heel KennethDirectorGrant8K$0.00$016K
2023-04-06Collins AllanDirectorGrant8K$0.00$016K
2023-04-06Schlorff EricChief Executive OfficerGrant66K$0.00$0265K
2023-04-06Baron CarylInterim CFOGrant11K$0.00$053K
2023-04-06Rodgers Bruce M.DirectorGrant8K$0.00$08K
2022-10-28LMFAO Sponsor, LLCTenPercentOwnerExercise or conversion2.6M$0.00$02.6M
2022-10-28LM FUNDING AMERICA, INC.TenPercentOwnerExercise or conversion2.6M$0.00$02.6M
2022-10-28Barnett RickDirectorGrant8K$0.00$08K
2022-10-28Schlorff EricChief Executive OfficerGrant199K$0.00$0199K
2022-10-28Collins AllanDirectorGrant8K$0.00$08K
2022-10-28Van Heel KennethDirectorGrant8K$0.00$08K
2022-10-28Baron CarylInterim CFOGrant42K$0.00$042K
2022-10-28Dow Employees' Pension Plan TrustTenPercentOwnerGrant4.1Mprice not stated in the filingnot stated4.1M
2022-10-28Dow Employees' Pension Plan TrustTenPercentOwnerBuy300K$10.00$3.0M4.4M
2022-10-28Union Carbide Employees' Pension Plan TrustTenPercentOwnerBuy200K$10.00$2.0M3.0M
2022-10-28Union Carbide Employees' Pension Plan TrustTenPercentOwnerGrant2.8Mprice not stated in the filingnot stated2.8M
2022-04-06Chung KevinChief Medical OfficerGrant44K$0.00$048K
2022-04-05Chung KevinChief Medical OfficerBuy4K$1.85$7K4K

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.

Large holders (13D and 13G)

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

6 holders report 5% or more of ICU in their latest filing, all on Schedule 13G (passive). The largest reported stake is Intracoastal Capital LLC at 10.0% of the class (443,253 shares), filed 2026-05-13 for an event on 2026-03-31.

FiledFormHolderSharesOf classEvent
2026-05-1313G/Ano. 3Intracoastal Capital LLCother entity443K10.0%2026-03-31
2026-05-1313G/Ano. 3Daniel B. Asherparent holding company, individual443K10.0%2026-03-31
2026-05-1313G/Ano. 3Mitchell P. Kopinparent holding company, individual443K10.0%2026-03-31
2026-05-1113GWaqas Khatriindividual278K6.5%2026-03-31
2026-05-1113GAlto Opportunity Master Fund, SPC - Segregated Master Portfolio Bcorporation278K6.5%2026-03-31
2026-05-1113GAyrton Capital LLCinvestment adviser278K6.5%2026-03-31

What this page is

SeaStar Medical Holding 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 SeaStar Medical Holding (ICU), SEC CIK 1831868, listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus. 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 2026-11-03.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
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 2026-05-13.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 2026-08-12.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 2026-08-18.JSON and CSV
Company record
EDGAR filing index for CIK 1831868Ticker, 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 ICU is sold short?
185,839 shares were held short at the 2026-10-15 settlement, 1.0 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 ICU's daily short volume?
On 2026-11-03, 289,795 of the 508,768 ICU shares reported to FINRA were sold short, 57.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ICU have fails to deliver?
The SEC's latest file shows 44,694 ICU shares failed to deliver at settlement 2026-10-09. Fails are reported per settlement date and published twice a month with a lag.
Are ICU insiders buying or selling?
Insiders at ICU reported 1 open-market buy worth $2K in the last 90 days and no open-market sells. Latest filing: Messinger Michael (Chief Financial Officer) on 2026-08-18.
Who owns 5% or more of ICU?
6 holders report 5% or more of ICU in their latest filing, all on Schedule 13G (passive). The largest reported stake is Intracoastal Capital LLC at 10.0% of the class (443,253 shares), filed 2026-05-13 for an event on 2026-03-31.

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