Short interest // FINRA, biweekly, dated

LNZAW short interest

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LanzaTech Global, Inc. Warrant

0%30%+0.25%Low short interest
0.25% of LNZAW’s shares outstanding is sold short

33,159 shares short / 13,089,163 shares outstanding (share count as of 2026-08-10, 10-Q).

“Low” describes how crowded the short position is, not where the stock goes next. Percent of shares outstanding, not percent of float; where filings allow it, the float version appears below as a floor.

As of the 2026-10-15 settlement, which is 26 days ago. FINRA publishes twice a month on the seventh business day after settlement, so this cycle was published around 2026-10-26 and the next is expected around 2026-11-10. No free source anywhere has anything fresher, including sites that display this number next to a live price.

Shares sold short33,159
⊙
EVIDENCE — filed/published fact
SourceFINRA consolidated short interest
FieldcurrentShortPositionQuantity
As of2026-10-15 settlement
HowFile shrt20261015.csv in FINRA's catalog (posted ~7 business days after settlement).
Open the source document →
Prior settlement41,722
Change-20.5%
Days to coverShares short divided by average daily volume, both FINRA figures.1.17
⊙
INFERENCE — derived by arithmetic
SourceFINRA consolidated short interest
FieldcurrentShortPositionQuantity ÷ averageDailyVolumeQuantity
As of2026-10-15 settlement
HowComputed from FINRA’s two published operands. FINRA’s own daysToCoverQuantity field floors at 1.00 and is not used.
Open the source document →
Average daily volume (FINRA, the days-to-cover denominator)28,250
ExchangeNasdaq (SmallCap)
Reg SHO threshold listPersistent settlement failures under Reg SHO Rule 203. A delivery-failure list, not a “naked shorting” list.Not on the list (2026-11-09)
Short interest, % of shares outstandingPercent of shares outstanding. Not percent of float, and the two are not the same number.0.25%
Shares outstandingfrom filings, as of 2026-08-1013,089,163

Short interest history

72 settlements on record, oldest 2023-08-15. Biweekly points, from FINRA’s own archive.

Dashed line at the 15 September 2026 settlement: FINRA began quoting every field of its short interest file. What it did to this history, and what we did

SettlementShares shortChange% of shares outDays to coverClose, USDValue short, USD
2026-10-1533,159-20.5%0.25%1.170.01441
2026-09-3041,722+13.7%0.32%8.210.01438
2026-09-1536,683-1.0%0.28%2.590.01550
2026-08-3137,054-2.6%0.28%1.50no stored barno close to value it
2026-08-1438,025+39.6%0.29%21.48no stored barno close to value it
2026-07-3127,235+110.4%0.21%2.670.02556
2026-07-1512,946-66.0%0.10%1.390.02233
2026-06-3038,029-12.0%0.29%6.530.02574
2026-06-1543,214+64.1%0.43%1.090.02687
2026-05-2926,339+1567.0%0.26%1.370.01385
2026-05-151,580-44.9%0.02%0.080.0122
2026-04-302,867-72.9%0.03%0.170.0244
Show the other 60 settlements, back to 2023-08-15
SettlementShares shortChange% of shares outDays to coverClose, USDValue short, USD
2026-04-1510,587+70.6%0.10%0.230.02226
2026-03-316,204+339.7%0.06%0.020.0187
2026-03-131,411+125.4%0.01%0.150.0118
2026-02-27626-29.8%0.01%0.060.018
2026-02-13892+11.5%0.01%0.080.0112
2026-01-30800+64.3%0.01%0.050.0111
2026-01-15487-93.4%0.02%0.040.017
2025-12-317,400-5.8%0.32%0.430.0188
2025-12-157,857+179.2%0.34%0.210.0196
2025-11-282,814+48.0%0.12%0.040.0244
2025-11-141,901+13.0%0.08%0.030.0229
2025-10-311,683-89.8%0.07%0.020.0226
2025-10-1516,540+4612.3%0.71%0.090.02344
2025-09-30351+0.0%0.02%0.010.026
2025-09-15351-22.2%0.00%0.010.0310
2025-08-29451-72.0%0.00%0.000.0210
2025-08-151,608-89.5%0.00%0.020.0240
2025-07-3115,327-6.0%0.01%0.140.03506
2025-07-1516,307+21.2%0.01%0.270.03414
2025-06-3013,453+34.3%0.01%0.190.03357
2025-06-1310,017+1379.6%0.00%0.190.04371
2025-05-30677-71.7%0.00%0.000.0213
2025-05-152,395-76.7%0.00%0.170.0362
2025-04-3010,281-33.3%0.00%0.550.03319
2025-04-1515,422+27.3%0.01%0.330.03477
2025-03-3112,116+347.4%0.01%0.110.06714
2025-03-142,708-60.7%0.00%0.090.12325
2025-02-286,894-84.2%0.00%0.080.171,172
2025-02-1443,581+703.2%0.02%0.820.208,716
2025-01-315,426-55.9%0.00%0.110.231,221
2025-01-1512,301-12.5%0.01%0.150.303,690
2024-12-3114,060+93.3%0.01%0.040.283,934
2024-12-137,272+974.2%0.00%0.170.09618
2024-11-29677no prior settlement0.00%0.040.1066
2024-10-151,090+1686.9%0.00%0.270.16173
2024-09-3061-92.1%0.00%0.02no stored barno close to value it
2024-09-13770-64.0%0.00%0.900.15118
2024-08-302,139-75.7%0.00%0.360.15321
2024-08-158,797-19.4%0.00%1.28no stored barno close to value it
2024-07-3110,908-38.1%0.01%1.730.212,345
2024-07-1517,610-5.5%0.01%35.080.244,226
2024-06-2818,636-14.6%0.01%4.13before stored barsno close to value it
2024-06-1421,831-1.2%0.01%1.25before stored barsno close to value it
2024-05-3122,086+1179.6%0.01%0.99before stored barsno close to value it
2024-05-151,726-7.3%0.00%0.10before stored barsno close to value it
2024-04-301,861-35.1%0.00%0.36before stored barsno close to value it
2024-04-152,868+450.5%0.00%0.18before stored barsno close to value it
2024-03-28521+2381.0%0.00%0.08before stored barsno close to value it
2024-03-1521-98.6%0.00%0.00before stored barsno close to value it
2024-02-291,516-44.2%0.00%0.05before stored barsno close to value it
2024-02-152,715+32.6%0.00%0.23before stored barsno close to value it
2024-01-312,048-73.9%0.00%0.25before stored barsno close to value it
2024-01-127,840+73.3%0.00%1.31before stored barsno close to value it
2023-12-294,524no prior settlement0.00%0.17before stored barsno close to value it
2023-11-30624no prior settlement0.00%0.09before stored barsno close to value it
2023-10-132,059-94.7%0.00%0.06before stored barsno close to value it
2023-09-2938,639+18.5%0.02%0.42before stored barsno close to value it
2023-09-1532,616+421.0%0.02%0.21before stored barsno close to value it
2023-08-316,260+6160.0%0.00%0.34before stored barsno close to value it
2023-08-15100no prior settlement0.00%0.00before stored barsno close to value it

Change is against the settlement before it, and is left out where one is missing from the archive. Percent of shares outstanding divides by the filed share count dated nearest each settlement, within 200 days, so it moves when the share count does; it is not percent of float. Close and value short (shares short times that day’s close, both as traded) come from our stored daily bars, which begin 2024-07-01; earlier settlements show none rather than a figure from another source. Nothing here is split-adjusted, so a split appears as the step it was.

Different measurement // daily, and not a position

Daily short volume

This is not the number above. Short interest is the position still held short, reported twice a month. Short volume is the share of a single day’s trading that was marked as a sell-short order, published daily. Most of it is market makers hedging and closing within the same session, so a stock printing a high figure here is not that percentage sold short.

Latest session (2026-11-09)
0.0%
Average, last 6 sessions
83.0%
2026-11-090.0%
2026-11-0698.3%
2026-11-04100.0%
2026-11-03100.0%
2026-10-29100.0%
2026-10-28100.0%

FINRA Reg SHO consolidated daily file. Sessions with no row for LNZAW are omitted rather than shown as zero.

Price context // daily bars, not short data

Where the price sits

Session of 2026-11-09, from 7 sessions of daily bars. These are price figures, not short figures, and they update daily rather than twice a month.

Close$0.01
Volume, latest session20,990

Some longer-window figures are absent because LNZAW has only 7 sessions of history. A 200-day average computed over fewer than 200 sessions is a different number with the same name, so it is left out rather than approximated.

Why there is no “% of float” here

Percent of float is the number the paid trackers lead with, and it is the one number in this category that cannot be published honestly for free. There is no free float share count: the SEC’s XBRL concept for float does not exist, and the closest one, public float, is measured in dollars and is filed once a year with the annual report. For Apple it currently reads as of March 2025, sixteen months ago.

So a free site showing percent of float is doing one of two things: quietly substituting shares outstanding, which for a heavily insider-held small company is a wildly different number, or republishing a commercial estimate it licensed. We publish the percentage that filed data supports, label it as percent of shares outstanding, and where insider Form 4 filings allow it we publish percent of float as an explicit floor: subtracting only filed direct insider holdings from shares outstanding gives a ceiling on float, so the division gives a number the true percentage can only exceed. What we will not do is print a bare “% of float” built on someone else’s estimate. Where a figure is measured, this site says what it was measured against. Read the methodology.

What days to cover means

Open short interest divided by average daily trading volume: roughly how many full sessions of normal volume it would take for every short position to be bought back. FINRA computes it per security at each settlement and we pass their figure through. This matters more than it sounds, because sites that compute their own pick their own volume window and rarely say which, so the same stock shows materially different values depending on where you look.

High short interest and high days to cover describe fuel, not ignition. They say a crowded position exists; they say nothing about whether it unwinds, and heavily shorted stocks frequently keep falling. Educational information, not investment advice.

FINRA is the owner and source of this short interest and short sale volume data. Free on every plan; not for redistribution.

LNZAW short interest FAQ

How old is this LNZAW short interest figure?

It is the 2026-10-15 settlement, which is 26 days ago. FINRA collects short interest twice a month and publishes on the seventh business day after each settlement date, so this was published around 2026-10-26 and the next cycle is expected around 2026-11-10. There is no fresher short interest available anywhere for free, including from tools that display it next to a live price.

Why does this show percent of shares outstanding rather than percent of float?

Because float share counts are not published by any free source. The SEC XBRL concept for float does not exist, and the nearest one is measured in dollars and comes only from the annual report. Every free site showing a float percentage is republishing a commercial estimate. We publish the percentage we can compute from filed data and label it for what it is, rather than passing shares outstanding off as float.

Where does days to cover come from?

Shares short divided by average daily volume, using FINRA’s own two published figures. We do not use FINRA’s own days-to-cover field, because it is floored at 1.00: across the current file, 7,869 securities, over a third of the market, are published at exactly 1.00 and nearly all of them are genuinely below it. One stock with a true ratio of 0.03 is published as 1.00. Sites that instead invent their own average-volume window produce a different problem, which is why the operands here are both FINRA’s.

Is high short interest a buy signal?

No. High short interest is frequently the market pricing real problems, and many heavily shorted stocks keep falling. This page measures positioning. It makes no recommendation.

Keep going: the full LNZAW workspace · short squeeze screener · LNZAW dilution profile · LNZAW off-exchange (ATS) volume · what short interest means · methodology