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Winchester Bancorp (WSBK)

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

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21K

Short interest

settlement 2026-09-30

3.4

Days to cover

+2.0 days vs prior

50.1%

Short share of volume

2026-10-23

33

Fails to deliver

settlement 2026-08-13

Wed 27 Jan

Next earnings

estimated date

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-23.

Short interest

FINRA, twice a month. The newest 34 settlements in the table, 34 in the chart. JSON

As of 30 September 2026, short interest in WSBK is 20,515 shares, up 7,149 shares over the last month. Over the last 34 readings it ranged from 9,635 shares (15 May 2025) to 35,951 shares (15 July 2025). At the reported average volume of 6K shares a day that is 3.4 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-3020,515+67.0%6,0793.37
2026-09-1512,283-8.1%8,7641.40
2026-08-3113,366-20.1%7,1261.88
2026-08-1416,730-9.9%12,5161.34
2026-07-3118,578+6.9%5,0333.69
2026-07-1517,380-3.5%2,7706.27
2026-06-3018,005+17.8%9,0052.00
2026-06-1515,283-11.4%6,0182.54
2026-05-2917,257+3.0%7,8382.20
2026-05-1516,754-16.1%8,2732.03
2026-04-3019,970-15.0%6,0623.29
2026-04-1523,501+18.2%4,1595.65
2026-03-3119,882-30.5%4,4394.48
2026-03-1328,599-1.4%15,3031.87
2026-02-2728,994-8.9%13,6972.12
2026-02-1331,826+31.5%15,6672.03
2026-01-3024,196+50.1%3,8116.35
2026-01-1516,119-7.4%13,5861.19
2025-12-3117,403-3.5%14,8501.17
2025-12-1518,040+13.2%15,8411.14
2025-11-2815,935+39.7%9,0561.76
2025-11-1411,404-10.0%75515.10
2025-10-3112,674-11.6%3,4363.69
2025-10-1514,336-34.5%4,7283.03
2025-09-3021,877-18.6%6,9863.13
2025-09-1526,870-5.7%7,1133.78
2025-08-2928,495+1.1%6,3584.48
2025-08-1528,171-14.8%6,5524.30
2025-07-3133,078-8.0%4,5667.24
2025-07-1535,951+0.5%5,9806.01
2025-06-3035,776+248.1%27,9081.28
2025-06-1310,277-39.4%19,1641.00
2025-05-3016,967+76.1%39,0461.00
2025-05-159,635+100.0%98,0721.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 23 October 2026, the short share of WSBK volume is 50.1%, up 31.2 points over the last five sessions. Over the last 30 readings it ranged from 5.6% (21 September 2026) to 99.9% (20 October 2026). The latest reading is 10.8 points above the 30-session average of 39.3%, on 12K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-236K12K50.1%0
2026-10-227167K9.6%0
2026-10-216096K10.3%0
2026-10-202K2K99.9%0
2026-10-195132K31.7%0
2026-10-164923K18.9%0
2026-10-152K6K28.0%100
2026-10-143K9K31.5%0
2026-10-134782K26.8%0
2026-10-121K2K47.9%0
2026-10-097442K38.6%0
2026-10-082924K7.1%0
2026-10-071K3K44.6%0
2026-10-062K9K24.2%0
2026-10-053K8K36.5%0
2026-10-026132K30.3%0
2026-10-013191K23.1%0
2026-09-3078299978.3%0
2026-09-297K8K85.5%0
2026-09-282K3K69.1%0
2026-09-251K2K65.2%0
2026-09-241K4K29.9%0
2026-09-234031K38.2%0
2026-09-229532K42.6%0
2026-09-211613K5.6%0
2026-09-182K5K35.8%0
2026-09-176752K40.0%0
2026-09-169344420.9%0
2026-09-158032K44.7%0
2026-09-142K3K63.9%100

Fails to deliver

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

As of 13 August 2026, the fails-to-deliver balance in WSBK is 33 shares, down 324 shares over the last settlement date. Over the last 30 readings it ranged from 19 shares (4 February 2026) to 3,700 shares (5 February 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-1333$13.02$430
2026-07-31357$13.03$5K
2026-06-30487$13.19$6K
2026-06-29373$13.14$5K
2026-06-0464$12.64$809
2026-06-031,904$12.70$24K
2026-05-1174$12.76$944
2026-04-17139$13.00$2K
2026-04-0945$12.85$578
2026-04-06100$12.75$1K
2026-04-0220$12.83$257
2026-03-2661$12.84$783
2026-03-1951$12.89$657
2026-03-17469$12.77$6K
2026-03-16478$12.80$6K
2026-03-11422$12.82$5K
2026-03-10399$12.87$5K
2026-03-04580$13.07$8K
2026-02-2387$13.10$1K
2026-02-201,232$13.04$16K
2026-02-17726$12.70$9K
2026-02-13215$12.60$3K
2026-02-1272$12.21$879
2026-02-10209$12.00$3K
2026-02-09328$11.96$4K
2026-02-053,700$11.91$44K
2026-02-0419$11.89$226
2026-01-30323$11.21$4K
2026-01-2984$11.07$930
2026-01-28536$10.81$6K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for WSBK in the last 90 days. The most recent filings are listed below. Latest filing: Merritt Edward J (Director) on 2026-05-26.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-05-26Merritt Edward JDirectorBuy915$12.76$12K21K
2026-05-21Carroll John APresident & CEOBuy50$12.75$63850
2026-05-07Snow John Ingalls IIIDirectorBuy200$12.77$3K20K
2026-05-07Snow John Ingalls IIIDirectorBuy2K$12.79$20K20K
2026-05-05Snow John Ingalls IIIDirectorGift200$0.00$0200
2026-05-05Snow John Ingalls IIIDirectorGift600$0.00$018K
2026-05-05Snow John Ingalls IIIDirectorBuy6K$12.87$79K19K
2026-05-01Boodakian Stephen HarryDirectorBuy3K$12.93$32K3K
2025-06-10Hood William PrestonDirectorBuy1K$9.21$10K51K
2025-05-14Hood William PrestonDirectorBuy4K$9.58$37K49K
2025-05-14Hood William PrestonDirectorBuy300$9.59$3K49K
2025-05-14Hood William PrestonDirectorBuy800$9.60$8K50K
2025-05-08Hood William PrestonDirectorBuy2K$9.65$23K40K
2025-05-08Hood William PrestonDirectorBuy5K$9.65$50K45K
2025-05-08Hood William PrestonDirectorBuy2K$9.63$24K37K
2025-05-07Hood William PrestonDirectorBuy300$9.69$3K30K
2025-05-07Hood William PrestonDirectorBuy4K$9.70$42K35K
2025-05-07Hood William PrestonDirectorBuy839$9.69$8K31K
2025-05-07Hood William PrestonDirectorBuy100$9.60$96025K
2025-05-07Hood William PrestonDirectorBuy297$9.62$3K25K
2025-05-07Hood William PrestonDirectorBuy3K$9.65$25K28K
2025-05-07Hood William PrestonDirectorBuy300$9.66$3K28K
2025-05-07Hood William PrestonDirectorBuy424$9.67$4K29K
2025-05-07Hood William PrestonDirectorBuy500$9.68$5K29K
2025-05-07Hood William PrestonDirectorBuy288$9.68$3K30K
2025-05-05Carroll John APresident & CEOBuy5K$9.80$50K21K
2025-05-05Carroll John APresident & CEOBuy825$9.80$8K22K
2025-05-05Carroll John APresident & CEOBuy3K$9.82$27K25K
2025-05-05Carroll John APresident & CEOBuy644$9.79$6K16K
2025-05-05Carroll John APresident & CEOBuy3K$9.78$27K16K
2025-05-05Carroll John APresident & CEOBuy4K$9.75$44K13K
2025-05-05Carroll John APresident & CEOBuy2K$9.75$16K8K
2025-05-05Carroll John APresident & CEOBuy4K$9.74$39K7K
2025-05-05Carroll John APresident & CEOBuy2K$9.73$22K3K
2025-05-05Carroll John APresident & CEOBuy600$9.60$6K600

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.

13F holders

Tracked managers holding WSBK at their latest 13F. JSON

1 of the 30 tracked managers held WSBK at their latest 13F, $413K in total at quarter-end prices. Renaissance Technologies is the largest at $413K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 0 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-3031K$413K0.00%+400

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

Winchester Bancorp 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 Winchester Bancorp (WSBK), SEC CIK 2047235, 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 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-08-13.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 2026-07-30.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 2026-05-26.JSON and CSV
Company record
EDGAR filing index for CIK 2047235Ticker, 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 WSBK is sold short?
20,515 shares were held short at the 2026-09-30 settlement, 3.4 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 WSBK's daily short volume?
On 2026-10-23, 5,883 of the 11,738 WSBK shares reported to FINRA were sold short, 50.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does WSBK have fails to deliver?
The SEC's latest file shows 33 WSBK shares failed to deliver at settlement 2026-08-13. Fails are reported per settlement date and published twice a month with a lag.
Are WSBK insiders buying or selling?
No open-market insider trades were reported for WSBK in the last 90 days. The most recent filings are listed below. Latest filing: Merritt Edward J (Director) on 2026-05-26.
Which tracked 13F managers own WSBK?
1 of the 30 tracked 13F managers held WSBK shares at their latest filing, $413K in all. The largest: Renaissance Technologies (31K shares, $413K).

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