Short interest // FINRA, biweekly, dated

VCNX short interest

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VACCINEX INC COM PAR $0.0001

0%30%+0.10%Low short interest
0.10% of VCNX’s shares outstanding is sold short

2,751 shares short / 2,676,637 shares outstanding (share count as of 2025-04-11, 10-K).

“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 25 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 short2,751
⊙
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 settlement2,388
Change+15.2%
Days to coverShares short divided by average daily volume, both FINRA figures.1.55
⊙
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)1,778
ExchangeOTC
Reg SHO threshold listPersistent settlement failures under Reg SHO Rule 203. A delivery-failure list, not a “naked shorting” list.no free publisher covers this venue
Short interest, % of shares outstandingPercent of shares outstanding. Not percent of float, and the two are not the same number.0.10%
Shares outstandingfrom filings, as of 2025-04-112,676,637

Short interest history

77 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
2026-10-152,751+15.2%no share count within 200 days1.55no stored barno close to value it
2026-09-302,388-7.9%no share count within 200 days5.29no stored barno close to value it
2026-09-152,593-4.6%no share count within 200 days0.69no stored barno close to value it
2026-08-312,717+8.2%no share count within 200 days0.39no stored barno close to value it
2026-08-142,511-5.6%no share count within 200 days4.53no stored barno close to value it
2026-07-312,661-4.8%no share count within 200 days2.89no stored barno close to value it
2026-07-152,794-29.6%no share count within 200 days2.73no stored barno close to value it
2026-06-303,968+4.7%no share count within 200 days3.06no stored barno close to value it
2026-06-153,791-13.8%no share count within 200 days0.61no stored barno close to value it
2026-05-294,399+21.7%no share count within 200 days0.41no stored barno close to value it
2026-05-153,615-9.5%no share count within 200 days4.50no stored barno close to value it
2026-04-303,994+167.9%no share count within 200 days0.82no stored barno close to value it
Show the other 65 settlements, back to 2023-08-15
SettlementShares shortChange% of shares outDays to coverClose, USDValue short, USD
2026-04-151,491+6.9%no share count within 200 days0.20no stored barno close to value it
2026-03-311,395-40.7%no share count within 200 days0.34no stored barno close to value it
2026-03-132,351+58.4%no share count within 200 days0.31no stored barno close to value it
2026-02-271,484-1.3%no share count within 200 days0.55no stored barno close to value it
2026-02-131,503-45.1%no share count within 200 days0.21no stored barno close to value it
2026-01-302,736+87.0%no share count within 200 days0.88no stored barno close to value it
2026-01-151,463-75.2%no share count within 200 days0.20no stored barno close to value it
2025-12-315,900+47.9%no share count within 200 days0.30no stored barno close to value it
2025-12-153,989+13.5%no share count within 200 days2.14no stored barno close to value it
2025-11-283,515-20.1%no share count within 200 days2.46no stored barno close to value it
2025-11-144,402-15.7%no share count within 200 days0.65no stored barno close to value it
2025-10-315,223+3.4%no share count within 200 days1.43no stored barno close to value it
2025-10-155,052+149.2%0.19%2.36no stored barno close to value it
2025-09-302,027-6.4%0.08%0.62no stored barno close to value it
2025-09-152,165-23.0%0.08%0.92no stored barno close to value it
2025-08-292,813-1.7%0.11%6.39no stored barno close to value it
2025-08-152,861+43.0%0.11%0.41no stored barno close to value it
2025-07-312,000-3.0%0.07%0.61no stored barno close to value it
2025-07-152,061+3.0%0.08%1.17no stored barno close to value it
2025-06-302,000-21.3%0.07%0.40no stored barno close to value it
2025-06-132,541+15.4%0.09%2.57no stored barno close to value it
2025-05-302,202+8.5%0.08%1.01no stored barno close to value it
2025-05-152,029-64.6%0.08%0.83no stored barno close to value it
2025-04-305,724+47.1%0.21%1.23no stored barno close to value it
2025-04-153,891-37.0%0.15%1.07no stored barno close to value it
2025-03-316,172+59.0%0.23%0.51no stored barno close to value it
2025-03-143,882-31.8%0.15%0.40no stored barno close to value it
2025-02-285,688+47.7%0.21%0.73no stored barno close to value it
2025-02-143,852-13.8%0.14%0.52no stored barno close to value it
2025-01-314,471-17.0%0.17%0.74no stored barno close to value it
2025-01-155,385-53.8%0.21%0.69no stored barno close to value it
2024-12-3111,658-83.6%0.45%0.11no stored barno close to value it
2024-12-1371,159+14.6%2.74%0.87no stored barno close to value it
2024-11-2962,111-44.6%2.39%1.193.78234,780
2024-11-15112,170-12.0%4.31%1.043.16354,457
2024-10-31127,496+269.5%4.90%0.602.79355,714
2024-10-1534,501-31.7%1.33%0.262.4283,320
2024-09-3050,494-8.2%1.94%1.513.40171,680
2024-09-1355,032-4.9%3.19%7.125.61308,779
2024-08-3057,863-37.8%3.35%1.955.73331,555
2024-08-1593,080+111.9%5.39%0.714.92457,954
2024-07-3143,931+188.8%2.54%0.195.10224,048
2024-07-1515,210-19.1%0.88%0.876.2595,063
2024-06-2818,804-6.6%1.09%1.48before stored barsno close to value it
2024-06-1420,133+120.0%1.27%0.84before stored barsno close to value it
2024-05-319,153-24.0%0.58%0.20before stored barsno close to value it
2024-05-1512,044-7.3%0.76%2.14before stored barsno close to value it
2024-04-3012,987-20.0%0.82%1.63before stored barsno close to value it
2024-04-1516,226+158.3%1.32%1.35before stored barsno close to value it
2024-03-286,281-28.6%0.51%0.74before stored barsno close to value it
2024-03-158,792-40.7%0.71%0.65before stored barsno close to value it
2024-02-2914,828-91.3%1.20%0.61before stored barsno close to value it
2024-02-15170,908+521.7%13.88%0.66before stored barsno close to value it
2024-01-3127,491-26.3%2.23%0.86before stored barsno close to value it
2024-01-1237,320-55.9%0.30%0.50before stored barsno close to value it
2023-12-2984,633+591.2%0.68%1.02before stored barsno close to value it
2023-12-1512,245-45.1%0.10%0.10before stored barsno close to value it
2023-11-3022,285-55.8%0.18%0.32before stored barsno close to value it
2023-11-1550,444+32.5%0.40%1.11before stored barsno close to value it
2023-10-3138,068-80.8%0.30%0.17before stored barsno close to value it
2023-10-13197,964-37.8%1.58%0.07before stored barsno close to value it
2023-09-29318,390+45.2%2.55%0.44before stored barsno close to value it
2023-09-15219,210+68.2%0.33%1.05before stored barsno close to value it
2023-08-31130,364+11.7%0.20%1.39before stored barsno close to value it
2023-08-15116,658no prior settlement0.18%1.28before 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.

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.

VCNX short interest FAQ

How old is this VCNX short interest figure?

It is the 2026-10-15 settlement, which is 25 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.

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