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Greene County Bancorp (GCBC)

Greene County Bancorp on one page: short interest, daily short volume, fails to deliver, planned sales, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as savings institutions, not federally chartered.

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102K

Short interest

settlement 2026-09-30

1.9

Days to cover

-5.9 days vs prior

80.7%

Short share of volume

2026-10-23

3,537

Fails to deliver

settlement 2026-09-16

Wed 20 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 48 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in GCBC is 102,327 shares, down 100,819 shares over the last month. Over the last 48 readings it ranged from 31,664 shares (29 August 2025) to 206,228 shares (31 July 2026). At the reported average volume of 54K shares a day that is 1.9 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-30102,327-46.5%54,2221.89
2026-09-15191,241-5.9%24,4997.81
2026-08-31203,146+0.2%25,4467.98
2026-08-14202,801-1.7%33,1046.13
2026-07-31206,228+9.5%35,3515.83
2026-07-15188,320+27.9%48,5143.88
2026-06-30147,180+138.8%97,7581.51
2026-06-1561,636+16.4%27,6452.23
2026-05-2952,949+17.0%10,4725.06
2026-05-1545,258+8.3%8,5845.27
2026-04-3041,806-5.3%12,2873.40
2026-04-1544,138-14.0%10,2824.29
2026-03-3151,332+16.6%18,7302.74
2026-03-1344,019+24.1%9,1584.81
2026-02-2735,470-5.7%9,2823.82
2026-02-1337,612-1.7%12,0193.13
2026-01-3038,271-0.6%11,0473.46
2026-01-1538,519+3.1%13,5342.85
2025-12-3137,344-35.6%15,1002.47
2025-12-1558,028+13.6%17,7313.27
2025-11-2851,075-0.8%10,8374.71
2025-11-1451,495+3.5%7,6586.72
2025-10-3149,774+13.0%11,3084.40
2025-10-1544,038+5.6%18,6272.36
2025-09-3041,699+21.9%12,5393.33
2025-09-1534,215+8.1%13,3212.57
2025-08-2931,664-20.6%8,3943.77
2025-08-1539,894+10.5%13,5482.94
2025-07-3136,092-21.9%21,2391.70
2025-07-1546,211-25.7%52,4931.00
2025-06-3062,205+14.2%28,8592.16
2025-06-1354,477-7.3%17,4583.12
2025-05-3058,797+5.8%33,4131.76
2025-05-1555,597+16.4%22,5992.46
2025-04-3047,760+16.7%28,6411.67
2025-04-1540,934-3.7%42,4761.00
2025-03-3142,525-13.7%118,7441.00
2025-03-1449,295+14.6%24,5122.01
2025-02-2843,031-36.4%18,0592.38
2025-02-1467,672+42.7%16,3994.13
2025-01-3147,423-12.5%27,0961.75
2025-01-1554,174+15.3%27,5921.96
2024-12-3147,004-11.5%22,2702.11
2024-12-1353,117-2.7%26,5822.00
2024-11-2954,597-42.2%16,6493.28
2024-11-1594,399+30.0%22,5704.18
2024-10-3172,625-15.2%8,6838.36
2024-10-1585,645+5.0%8,8729.65

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 23 October 2026, the short share of GCBC volume is 80.7%, down 6.1 points over the last five sessions. Over the last 30 readings it ranged from 24.2% (24 September 2026) to 86.8% (16 October 2026). The latest reading sits at the top of that range. The latest reading is 22.7 points above the 30-session average of 58.0%, on 4K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-234K4K80.7%0
2026-10-223K6K40.9%0
2026-10-212K4K56.5%0
2026-10-202K4K53.6%0
2026-10-192K3K75.7%0
2026-10-162K2K86.8%0
2026-10-152K3K59.7%0
2026-10-143K5K63.4%0
2026-10-134K13K31.0%0
2026-10-122K5K48.8%0
2026-10-092K3K46.9%0
2026-10-081K2K63.3%0
2026-10-074K6K72.0%0
2026-10-069172K42.8%0
2026-10-052K5K28.7%0
2026-10-027K10K69.7%0
2026-10-013K5K62.6%0
2026-09-302K7K26.3%0
2026-09-292K4K54.7%0
2026-09-283K5K62.1%0
2026-09-252K4K67.1%0
2026-09-246K23K24.2%0
2026-09-232K3K55.3%0
2026-09-223K6K44.4%0
2026-09-213K6K45.0%0
2026-09-185K8K70.9%0
2026-09-176K7K84.4%0
2026-09-167K9K76.6%0
2026-09-1514K21K65.9%0
2026-09-147K8K79.1%0

Fails to deliver

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

As of 16 September 2026, the fails-to-deliver balance in GCBC is 3,537 shares, down 2,058 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (2 March 2026) to 5,595 shares (9 September 2026).

SettlementShares failedPriceValue
2026-09-163,537$36.02$127K
2026-09-095,595$34.66$194K
2026-09-03401$34.74$14K
2026-09-02996$34.28$34K
2026-09-011,170$34.39$40K
2026-08-3141$34.86$1K
2026-08-14160$34.96$6K
2026-08-1373$35.29$3K
2026-08-10323$34.57$11K
2026-07-1713$33.50$436
2026-07-161,009$32.68$33K
2026-07-09109$31.71$3K
2026-06-301,469$33.10$49K
2026-06-29378$32.83$12K
2026-06-0335$25.90$907
2026-05-2842$25.25$1K
2026-05-2781$25.25$2K
2026-05-2647$25.07$1K
2026-05-2291$25.00$2K
2026-05-19142$24.80$4K
2026-05-183,609$24.80$90K
2026-05-153,464$24.95$86K
2026-05-14481$24.33$12K
2026-04-29202$24.60$5K
2026-04-2834$24.19$822
2026-03-12337$22.20$7K
2026-03-021$22.07$22
2026-02-13963$23.58$23K
2026-02-12207$23.81$5K
2026-01-2020$22.45$449

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for GCBC in the last 90 days. The most recent filings are listed below. Latest filing: PLUMMER MICHELLE M (Director) on 2026-06-11.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-06-11PLUMMER MICHELLE MDirectorSell10K$28.77$288K100K
2026-04-28Brust JohnDirectorBuy2K$24.50$50K6K
2026-04-27Brust JohnDirectorBuy1K$24.06$25K4K
2026-04-27Brust JohnDirectorBuy1K$24.05$25K3K
2026-03-18Hogan Peter W.DirectorBuy3K$22.10$66K75K
2026-03-18Hada Tejraj SDirectorBuy4K$21.95$88K35K
2026-03-17Hada Tejraj SDirectorBuy2K$21.99$44K31K
2026-03-05Barzee NickSVP and CFOBuy1K$22.55$29K5K
2026-03-02Cannucciari ChristopherDirectorBuy1K$22.05$29K4K
2025-11-19Hada Tejraj SDirectorSmall acquisition268$21.95$6K28K
2025-11-18Hada Tejraj SDirectorBuy3K$21.96$66K28K
2025-11-18Antalek JohnEVP and CLOBuy2K$22.00$33K8K
2025-11-14Hada Tejraj SDirectorBuy366$22.00$8K25K
2025-11-05Hada Tejraj SDirectorBuy2K$22.52$34K25K
2025-11-04Hada Tejraj SDirectorBuy45$22.20$99923K
2025-11-03Hada Tejraj SDirectorBuy235$21.80$5K23K
2025-10-29Gibson Donald EPresident and CEOBuy500$21.75$11K1K
2025-10-29Gibson Donald EPresident and CEOBuy500$22.00$11K500
2025-10-29Cannucciari ChristopherDirectorBuy423$22.79$10K3K
2025-10-28Cannucciari ChristopherDirectorBuy706$22.91$16K3K
2025-10-24Cahalan Jay P.DirectorBuy810$22.58$18K35K
2025-10-24Cahalan Jay P.DirectorBuy402$22.72$9K35K
2025-10-24Cahalan Jay P.DirectorBuy500$22.67$11K34K
2025-10-24Cahalan Jay P.DirectorBuy10$22.62$22634K
2025-10-24Cahalan Jay P.DirectorBuy27$22.60$61034K
2025-10-24Cahalan Jay P.DirectorBuy2K$22.82$39K34K
2025-10-24Cahalan Jay P.DirectorBuy101$22.78$2K32K
2025-10-24Cahalan Jay P.DirectorBuy600$22.75$14K32K
2025-10-24Cahalan Jay P.DirectorBuy150$22.69$3K31K
2025-06-11Gibson Donald EPresident and CEOGift125K$0.00$0125K
2025-06-11Gibson Donald EPresident and CEOGift125K$0.00$00
2025-05-15Hada Tejraj SDirectorBuy388$22.95$9K23K
2025-05-14Hada Tejraj SDirectorBuy7K$22.95$152K22K
2025-05-05Cannucciari ChristopherDirectorBuy38$22.50$8552K
2025-05-05Cannucciari ChristopherDirectorBuy10$22.50$22538
2025-05-02Cannucciari ChristopherDirectorBuy10$22.50$22538
2025-05-02Cannucciari ChristopherDirectorBuy105$22.33$2K2K
2025-05-02Cannucciari ChristopherDirectorBuy28$22.33$62528
2025-05-01Cannucciari ChristopherDirectorBuy290$22.20$6K2K
2025-04-25Barzee NickSVP and CFOBuy2K$21.50$32K3K
2025-03-19Hada Tejraj SDirectorBuy2K$23.25$47K16K
2025-03-19Hada Tejraj SDirectorBuy4K$23.50$94K13K
2025-03-19Hada Tejraj SDirectorBuy1K$23.26$23K14K
2025-02-28Cahalan Jay P.DirectorBuy2K$26.94$48K31K
2025-02-27Cahalan Jay P.DirectorBuy2K$26.45$51K29K
2025-01-31Barzee NickSVP and CFOBuy840$26.50$22K2K
2024-11-01Hada Tejraj SDirectorBuy2K$28.00$56K9K
2024-10-25Barzee NickSVP and CFOBuy892$28.57$25K900
2024-06-18PLUMMER MICHELLE MSEVP, CFO & COOSell9K$30.56$274K110K
2024-06-17PLUMMER MICHELLE MSEVP, CFO & COOSell200$30.40$6K119K
2024-06-13PLUMMER MICHELLE MSEVP, CFO & COOSell3K$30.32$96K119K
2024-05-15Cahalan Jay P.DirectorSell1K$31.64$46K2K
2024-05-15Cahalan Jay P.DirectorSell2K$31.67$74K5K
2024-05-15Cahalan Jay P.DirectorSell2K$31.68$48K3K
2024-05-15Cahalan Jay P.DirectorSell2K$31.62$55K0
2023-09-18Hada Tejraj SDirectorBuy1K$24.50$25K7K
2023-08-14Gibson Donald EPresident and CEOSell537$35.70$19K0
2023-08-04Gibson Donald EPresident and CEOSell2K$34.50$65K2K
2023-08-04Gibson Donald EPresident and CEOSell2K$34.75$61K537
2023-07-31Gibson Donald EPresident and CEOSell18$34.50$6214K
2023-07-28Gibson Donald EPresident and CEOSell90$34.50$3K4K
2023-06-07PLUMMER MICHELLE MSEVP, CFO & COOSell10K$28.35$284K122K
2023-05-08Hada Tejraj SDirectorBuy2K$18.20$36K6K
2023-02-28Cahalan Jay P.DirectorBuy720$56.95$41K14K
2023-02-10Hada Tejraj SDirectorBuy566$48.00$27K2K
2023-01-27NELSON STEPHEN EDirectorSell5K$47.00$229K17K
2023-01-26Hada Tejraj SDirectorBuy250$46.30$12K1K
2023-01-26Hada Tejraj SDirectorBuy250$46.20$12K954
2023-01-26Hada Tejraj SDirectorBuy250$46.40$12K704
2023-01-26Hada Tejraj SDirectorBuy250$46.50$12K454
2022-12-07NELSON STEPHEN EDirectorBuy309$73.84$23K22K
2022-06-14Cahalan Jay P.DirectorBuy1K$45.00$48K13K
2022-06-13Gibson Donald EPresident and CEOBuy500$44.00$22K7K
2022-06-13Gibson Donald EPresident and CEOBuy459$45.00$21K7K
2022-06-10Gibson Donald EPresident and CEOBuy41$45.00$2K6K
2022-06-01SLUTZKY PAULDirectorSell2K$55.19$131K93K
2022-05-31Gibson Donald EPresident and CEOSell4K$56.00$224K6K
2022-05-27Gibson Donald EPresident and CEOSell5K$55.00$275K58K
2022-02-17Cahalan Jay P.DirectorBuy770$39.00$30K12K
2021-11-26Gibson Donald EPresident and CEOBuy200$33.01$7K63K
2021-02-17Cahalan Jay P.DirectorBuy610$24.25$15K11K
2021-01-29Hogan Peter W.DirectorBuy1K$23.97$24K36K
2021-01-28Cahalan Jay P.DirectorBuy851$24.45$21K11K
2021-01-28Cahalan Jay P.DirectorBuy93$24.52$2K9K
2021-01-28Cahalan Jay P.DirectorBuy206$24.49$5K10K
2020-09-18Gibson Donald EPresident and CEOBuy1K$22.28$22K10K
2020-08-25Cahalan Jay P.DirectorBuy1K$22.70$24K9K
2020-08-21Cahalan Jay P.DirectorSmall acquisition1$22.00$228K
2020-08-20Cahalan Jay P.DirectorSmall acquisition14$22.00$3088K
2020-08-19Cahalan Jay P.DirectorBuy1K$22.00$32K8K
2020-08-11Gibson Donald EPresident and CEOBuy15$21.93$3299K
2020-08-11Gibson Donald EPresident and CEOBuy485$22.00$11K9K
2020-06-22Gibson Donald EPresident and CEOBuy362$22.05$8K9K
2020-06-11Gibson Donald EPresident and CEOBuy1K$22.01$22K8K
2020-06-11SLUTZKY PAULDirectorBuy500$21.05$11K22K
2020-05-20SLUTZKY PAULDirectorBuy14$21.05$29521K
2020-05-14Gibson Donald EPresident and CEOBuy300$20.25$6K8K
2020-05-13Gibson Donald EPresident and CEOBuy300$20.51$6K7K
2020-05-12SLUTZKY PAULDirectorBuy250$21.25$5K21K
2020-05-01Hogan Peter W.DirectorBuy2K$21.00$42K35K

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.

Planned sales (Form 144)

Newest first. JSON

1 Form 144 notice on file for GCBC worth $282K at the prices reported; 0 in the last 90 days worth $0. Latest: Plummer, Michelle M. (GCBC) filed on 2026-06-11 to sell 10,000 shares ($282K) from 2026-06-11.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-06-11Plummer, Michelle M. (GCBC)Director10K$282K0.059%2026-06-11Northwestern Mutual

13F holders

Tracked managers holding GCBC at their latest 13F. JSON

4 of the 30 tracked managers held GCBC at their latest 13F, $3.5M in total at quarter-end prices. Renaissance Technologies is the largest at $1.8M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 2 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-3052K$1.8M0.00%+1K
AQR Capital Management2026-06-3024K$816K0.00%+8K
Two Sigma Investments2026-06-3017K$571K0.00%-3K
Citadel Advisors2026-06-3010K$337K0.00%-1K

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

Greene County 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 Greene County Bancorp (GCBC), SEC CIK 1070524, listed on Nasdaq, classified by the SEC as savings institutions, not federally chartered. 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 2026-09-16.JSON and CSV
Planned sales
SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-06-11.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 2026-10-22.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 2026-06-11.JSON and CSV
Company record
EDGAR filing index for CIK 1070524Ticker, 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 companies the SEC classifies as savings institutions, not federally chartered

Other company pages

Datasets

Frequently Asked Questions

How much of GCBC is sold short?
102,327 shares were held short at the 2026-09-30 settlement, 1.9 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 GCBC's daily short volume?
On 2026-10-23, 3,518 of the 4,360 GCBC shares reported to FINRA were sold short, 80.7% of the day's reported volume. Short volume is a flow for one day, not a position.
Does GCBC have fails to deliver?
The SEC's latest file shows 3,537 GCBC shares failed to deliver at settlement 2026-09-16. Fails are reported per settlement date and published twice a month with a lag.
Are GCBC insiders buying or selling?
No open-market insider trades were reported for GCBC in the last 90 days. The most recent filings are listed below. Latest filing: PLUMMER MICHELLE M (Director) on 2026-06-11.
Have GCBC insiders filed to sell?
1 Form 144 notice on file for GCBC worth $282K at the prices reported; 0 in the last 90 days worth $0. Latest: Plummer, Michelle M. (GCBC) filed on 2026-06-11 to sell 10,000 shares ($282K) from 2026-06-11.
Which tracked 13F managers own GCBC?
4 of the 30 tracked 13F managers held GCBC shares at their latest filing, $3.5M in all. The largest: Renaissance Technologies (52K shares, $1.8M), Cliff Asness's AQR Capital Management (24K shares, $816K), Two Sigma Investments (17K shares, $571K), Ken Griffin's Citadel Advisors (10K shares, $337K).

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