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Instil Bio (TIL)

Instil Bio on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq.

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170K

Short interest

settlement 2026-10-15

6.8

Days to cover

-2.6 days vs prior

18.0%

Short share of volume

2026-11-02

25,099

Fails to deliver

settlement 2026-09-22

Thu 12 Nov

Next earnings

estimated date

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-11-02.

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 TIL is 170,479 shares, up 8,609 shares over the last month. Over the last 48 readings it ranged from 156,830 shares (31 August 2026) to 1,128,142 shares (15 July 2025). The latest reading sits at the bottom of that range. At the reported average volume of 25K shares a day that is 6.8 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-10-15170,479+7.2%25,2436.75
2026-09-30159,044-1.8%17,0869.31
2026-09-15161,870+3.2%12,32913.13
2026-08-31156,830-11.1%6,85122.89
2026-08-14176,320-6.8%8,20021.50
2026-07-31189,165-7.2%10,63317.79
2026-07-15203,828-13.2%13,19815.44
2026-06-30234,769+0.4%22,02310.66
2026-06-15233,731+0.4%13,17517.74
2026-05-29232,840+0.6%37,2086.26
2026-05-15231,366-11.2%30,1567.67
2026-04-30260,419-20.7%14,58117.86
2026-04-15328,526-20.8%35,3909.28
2026-03-31414,920+4.0%24,16117.17
2026-03-13398,818-4.3%28,76713.86
2026-02-27416,610-0.3%65,5976.35
2026-02-13418,059-9.7%65,4356.39
2026-01-30462,747-5.7%71,8446.44
2026-01-15490,484-12.7%447,8401.10
2025-12-31561,996+3.2%59,0999.51
2025-12-15544,356-0.9%56,0929.70
2025-11-28549,217-0.4%87,1796.30
2025-11-14551,466-20.1%61,4028.98
2025-10-31690,632-8.6%59,39611.63
2025-10-15755,629-15.4%129,8405.82
2025-09-30893,492-6.0%182,2664.90
2025-09-15950,827+0.1%188,9095.03
2025-08-29950,366+5.2%96,6569.83
2025-08-15903,288-12.9%140,0016.45
2025-07-311,036,655-8.1%196,2845.28
2025-07-151,128,142+10.2%312,7103.61
2025-06-301,024,197+26.1%305,7373.35
2025-06-13812,235+33.2%470,7881.73
2025-05-30609,770+34.7%528,8211.15
2025-05-15452,775-19.4%96,3404.70
2025-04-30561,952+2.3%255,3162.20
2025-04-15549,304-2.8%87,9386.25
2025-03-31565,118+3.3%75,3927.50
2025-03-14547,298+3.7%92,6585.91
2025-02-28527,771+5.6%85,5006.17
2025-02-14499,941-28.3%71,9806.95
2025-01-31696,978+4.2%85,8748.12
2025-01-15669,087+13.8%132,0345.07
2024-12-31587,920+29.7%81,8827.18
2024-12-13453,335+86.0%118,7243.82
2024-11-29243,787-19.6%98,7332.47
2024-11-15303,199-19.4%165,9651.83
2024-10-31375,997+12.3%130,9762.87

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of TIL volume is 18.0%, down 22.6 points over the last five sessions. Over the last 30 readings it ranged from 3.8% (16 October 2026) to 81.9% (24 September 2026). The latest reading is 21.5 points below the 30-session average of 39.5%, on 12K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-11-022K12K18.0%0
2026-10-306K8K76.9%0
2026-10-298K13K63.3%0
2026-10-2834K58K58.6%1
2026-10-272K17K12.8%0
2026-10-262K5K40.6%0
2026-10-2315K36K42.0%0
2026-10-224K26K13.7%0
2026-10-212K13K14.8%0
2026-10-205K29K16.8%0
2026-10-1915K75K20.5%0
2026-10-162236K3.8%0
2026-10-153K5K49.2%0
2026-10-145K9K54.4%0
2026-10-134K9K43.9%0
2026-10-1250183060.4%0
2026-10-096K9K61.9%0
2026-10-087K30K22.9%0
2026-10-073112K17.6%0
2026-10-066K16K37.3%0
2026-10-058722K47.9%0
2026-10-022K8K20.3%0
2026-10-012K3K60.0%0
2026-09-302K5K47.1%0
2026-09-291K2K55.0%0
2026-09-282K4K49.2%0
2026-09-2549198549.9%0
2026-09-244K5K81.9%0
2026-09-232992K19.9%0
2026-09-222K7K23.3%585

Fails to deliver

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

As of 22 September 2026, the fails-to-deliver balance in TIL is 25,099 shares, up 25,097 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (9 September 2026) to 25,099 shares (22 September 2026). The latest reading sits at the top of that range.

SettlementShares failedPriceValue
2026-09-2225,099$7.07$177K
2026-09-182$7.21$14
2026-09-091$7.82$8
2026-09-0879$7.58$599
2026-08-124$7.49$30
2026-07-30270$7.22$2K
2026-07-20407$7.42$3K
2026-07-17472$7.51$4K
2026-07-151,167$7.82$9K
2026-07-143$7.64$23
2026-07-06769$7.73$6K
2026-06-26289$7.46$2K
2026-05-15345$8.05$3K
2026-05-14345$8.02$3K
2026-05-0431$7.90$245
2026-04-282$8.13$16
2026-04-2337$8.41$311
2026-04-2099$8.88$879
2026-04-17155$8.90$1K
2026-04-15185$8.44$2K
2026-04-14145$8.36$1K
2026-04-13282$8.11$2K
2026-04-07190$8.46$2K
2026-04-061,932$8.03$16K
2026-03-2417$8.42$143
2026-03-1786$8.21$706
2026-03-16319$8.26$3K
2026-03-13800$8.75$7K
2026-03-121,024$9.03$9K
2026-03-1051$8.90$454

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for TIL in the last 90 days. The most recent filings are listed below. Latest filing: Laumas Sandeep (CFO and CBO) on 2025-09-10.

DateInsiderTitleTypeSharesPriceValueOwned after
2025-09-10Laumas SandeepCFO and CBOSell12K$23.88$298K0
2025-09-10Laumas SandeepCFO and CBOSell18K$23.04$404K12K
2025-09-10Laumas SandeepCFO and CBOExercise or conversion13K$12.68$165K30K
2025-09-10Laumas SandeepCFO and CBOExercise or conversion17K$11.60$197K17K
2022-03-15McGaughy R Kent JrDirectorOther transaction260K$0.00$08.2M
2021-03-23Crouch BronsonCEO and ChairmanConversion6.1Mprice not stated in the filingnot stated36.1M
2021-03-23Crouch BronsonCEO and ChairmanConversion30.0Mprice not stated in the filingnot stated30.0M
2021-03-23Crouch BronsonCEO and ChairmanConversion1.4Mprice not stated in the filingnot stated37.5M
2021-03-23Crouch BronsonCEO and ChairmanBuy450K$20.00$9.0M38.0M
2021-03-23Curative Ventures V LLCTenPercentOwnerConversion1.4Mprice not stated in the filingnot stated37.5M
2021-03-23Curative Ventures V LLCTenPercentOwnerConversion6.1Mprice not stated in the filingnot stated36.1M
2021-03-23Curative Ventures V LLCTenPercentOwnerConversion30.0Mprice not stated in the filingnot stated30.0M
2021-03-23Curative Ventures V LLCTenPercentOwnerBuy450K$20.00$9.0M38.0M
2021-03-23McGaughy R Kent JrDirectorConversion954Kprice not stated in the filingnot stated8.0M
2021-03-23McGaughy R Kent JrDirectorConversion7.1Mprice not stated in the filingnot stated7.1M
2021-03-23McGaughy R Kent JrDirectorBuy450K$20.00$9.0M8.5M
2021-03-23Nielsen JackDirectorConversion11.7Mprice not stated in the filingnot stated11.7M
2021-03-23Nielsen JackDirectorBuy300K$20.00$6.0M12.5M
2021-03-23Nielsen JackDirectorConversion477Kprice not stated in the filingnot stated12.2M
2021-03-23Shah Nimish PDirectorBuy48K$20.00$968K48K
2021-03-23Shah Nimish PDirectorBuy117K$20.00$2.3M598K
2021-03-23Shah Nimish PDirectorBuy10K$20.00$209K564K
2021-03-23Shah Nimish PDirectorBuy20K$20.00$392K20K
2021-03-23Shah Nimish PDirectorBuy105K$20.00$2.1M5.6M
2021-03-23Shah Nimish PDirectorConversion481Kprice not stated in the filingnot stated481K
2021-03-23Shah Nimish PDirectorConversion43Kprice not stated in the filingnot stated553K
2021-03-23Shah Nimish PDirectorConversion430Kprice not stated in the filingnot stated5.5M
2021-03-23Shah Nimish PDirectorConversion510Kprice not stated in the filingnot stated510K
2021-03-23Shah Nimish PDirectorConversion5.1Mprice not stated in the filingnot stated5.1M
2021-03-23Vivo Capital Fund IX, L.P.TenPercentOwnerBuy300K$20.00$6.0M12.5M
2021-03-23Vivo Capital Fund IX, L.P.TenPercentOwnerConversion477Kprice not stated in the filingnot stated12.2M
2021-03-23Vivo Capital Fund IX, L.P.TenPercentOwnerConversion11.7Mprice not stated in the filingnot stated11.7M

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

1 holder reports 5% or more of TIL in its latest filing, on Schedule 13G (passive). The holder is BML Investment Partners, L.P. at 9.5% of the class (645,600 shares), filed 2026-02-09 for an event on 2025-12-31.

FiledFormHolderSharesOf classEvent
2026-02-0913G/Ano. 2BML Investment Partners, L.P.partnership646K9.5%2025-12-31

13F holders

Tracked managers holding TIL at their latest 13F. JSON

3 of the 30 tracked managers held TIL at their latest 13F, $1.7M in total at quarter-end prices. Millennium Management is the largest at $1.0M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 2 cut.

FundQuarterSharesValueOf portfolioChange in shares
Millennium Management2026-06-30135K$1.0M0.00%+2K
Renaissance Technologies2026-06-3050K$387K0.00%-9K
Citadel Advisors2026-06-3031K$236K0.00%-8K

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

Instil Bio 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 Instil Bio (TIL), SEC CIK 1789769, listed on Nasdaq. 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 2026-11-02.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-22.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 2026-02-09.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 2026-08-13.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 2025-09-10.JSON and CSV
Company record
EDGAR filing index for CIK 1789769Ticker, 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 company pages

Datasets

Frequently Asked Questions

How much of TIL is sold short?
170,479 shares were held short at the 2026-10-15 settlement, 6.8 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 TIL's daily short volume?
On 2026-11-02, 2,130 of the 11,826 TIL shares reported to FINRA were sold short, 18.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does TIL have fails to deliver?
The SEC's latest file shows 25,099 TIL shares failed to deliver at settlement 2026-09-22. Fails are reported per settlement date and published twice a month with a lag.
Are TIL insiders buying or selling?
No open-market insider trades were reported for TIL in the last 90 days. The most recent filings are listed below. Latest filing: Laumas Sandeep (CFO and CBO) on 2025-09-10.
Who owns 5% or more of TIL?
1 holder reports 5% or more of TIL in its latest filing, on Schedule 13G (passive). The holder is BML Investment Partners, L.P. at 9.5% of the class (645,600 shares), filed 2026-02-09 for an event on 2025-12-31.
Which tracked 13F managers own TIL?
3 of the 30 tracked 13F managers held TIL shares at their latest filing, $1.7M in all. The largest: Izzy Englander's Millennium Management (135K shares, $1.0M), Renaissance Technologies (50K shares, $387K), Ken Griffin's Citadel Advisors (31K shares, $236K).

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