XOOMAR

Nano Nuclear Energy Inc. (NNE)

Every FINRA and SEC series the site collects for Nano Nuclear Energy Inc.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as electric services.

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15.0M

Short interest

settlement 2026-08-31

9.7

Days to cover

+2.3% vs prior

67.7%

Short share of volume

2026-09-11

97

Fails to deliver

settlement 2026-08-14

-$9.2M

Insider flow, 90 days

0 buys, 4 sells

As of 2026-09-11.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 31 August 2026, short interest in NNE is 14,950,361 shares, down 306,297 shares over the last month. Over the last 48 readings it ranged from 656,963 shares (13 September 2024) to 15,256,658 shares (31 July 2026). The latest reading sits at the top of that range. At the reported average volume of 1.5M shares a day that is 9.7 days to cover, elevated.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-3114,950,361+2.3%1,542,6999.69
2026-08-1414,621,498-4.2%2,049,7297.13
2026-07-3115,256,658+10.3%2,145,7567.11
2026-07-1513,837,618+16.3%2,151,9346.43
2026-06-3011,894,099+3.6%3,284,6923.62
2026-06-1511,484,871+16.8%3,457,1643.32
2026-05-299,834,731+9.2%2,563,4783.84
2026-05-159,004,697-6.4%2,727,1733.30
2026-04-309,618,951+8.5%2,130,2864.52
2026-04-158,864,133+5.2%2,071,9204.28
2026-03-318,423,275-37.1%2,298,0903.67
2026-03-1313,385,881+5.8%1,260,10210.62
2026-02-2712,656,130-3.5%1,258,07510.06
2026-02-1313,116,146+8.2%1,624,6548.07
2026-01-3012,118,389-4.3%2,315,0595.23
2026-01-1512,669,139-0.6%2,114,9185.99
2025-12-3112,746,278+1.5%2,207,5645.77
2025-12-1512,555,076+1.2%1,512,9898.30
2025-11-2812,408,107+4.6%1,808,6786.86
2025-11-1411,863,275-4.2%2,185,9665.43
2025-10-3112,385,048+10.8%3,747,0993.31
2025-10-1511,175,475+51.2%6,756,9541.65
2025-09-307,390,750-2.2%4,077,9091.81
2025-09-157,559,537-1.0%2,259,4993.35

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of NNE volume is 67.7%, up 27.4 points over the last five sessions. Over the last 52 readings it ranged from 40.3% (3 September 2026) to 67.7% (11 September 2026). The latest reading sits at the top of that range. The latest reading is 14.1 points above the 30-session average of 53.6%, on 1.1M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-11723K1.1M67.7%7,487
2026-09-10399K656K60.8%2,105
2026-09-09390K776K50.2%6,038
2026-09-08463K1.1M41.8%627
2026-09-04371K668K55.5%981
2026-09-03258K642K40.3%3,655
2026-09-02262K500K52.3%10
2026-09-01369K683K54.0%29,002
2026-08-31307K528K58.0%386
2026-08-28609K991K61.4%80
2026-08-27331K679K48.7%0
2026-08-26507K845K59.9%1,395
2026-08-25411K718K57.2%64
2026-08-24379K582K65.2%1,392
2026-08-21373K767K48.6%697
2026-08-20411K737K55.8%3,281
2026-08-19401K778K51.6%300
2026-08-18385K899K42.9%377
2026-08-17311K641K48.5%351
2026-08-14425K884K48.1%6,333
2026-08-13702K1.6M43.8%1,165
2026-08-12687K1.1M62.5%12
2026-08-11466K796K58.5%21,660
2026-08-10362K667K54.2%4,591
2026-08-07434K881K49.3%200
2026-08-06343K664K51.6%0
2026-08-05347K641K54.2%401
2026-08-04537K1.0M53.5%1,227
2026-08-03667K1.2M53.6%1,774
2026-07-31485K845K57.4%4,372

Fails to deliver

SEC, by settlement date. JSON

As of 14 August 2026, the fails-to-deliver balance in NNE is 97 shares, down 38,263 shares over the last settlement date. Over the last 52 readings it ranged from 7 shares (30 July 2026) to 627,795 shares (4 June 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-1497$20.52$2K
2026-08-1338,360$19.01$729K
2026-08-1242,108$19.38$816K
2026-08-1134,128$18.57$634K
2026-08-10310$18.85$6K
2026-08-0795$17.61$2K
2026-08-061,778$17.88$32K
2026-08-051,078$18.17$20K
2026-08-041,690$17.58$30K
2026-07-3123,623$16.68$394K
2026-07-307$14.88$104
2026-07-29841$16.06$14K
2026-07-28132$16.79$2K
2026-07-2772$15.59$1K
2026-07-242,226$16.88$38K
2026-07-239,256$17.32$160K
2026-07-2233,689$17.30$583K
2026-07-21561$16.41$9K
2026-07-209,617$16.03$154K
2026-07-178,248$16.20$134K
2026-07-1627,026$17.87$483K
2026-07-101,566$19.29$30K
2026-07-091,409$18.96$27K
2026-07-088,240$18.88$156K
2026-07-07119$20.19$2K
2026-07-0675,193$20.03$1.5M
2026-07-01114,384$21.14$2.4M
2026-06-30137,270$21.32$2.9M
2026-06-29214,924$19.87$4.3M
2026-06-26107,403$20.65$2.2M

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Insiders at NNE reported 4 open-market sells worth $9.2M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Walker James John (Chief Executive Officer) on 2026-09-03.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-03Walker James JohnChief Executive OfficerSell25K$17.77$444K635K
2026-09-02Yu JiangPresident and ChairmanSell142K$17.48$2.5M7.7M
2026-09-01Yu JiangPresident and ChairmanSell333K$17.45$5.8M7.9M
2026-09-01Walker James JohnChief Executive OfficerSell25K$17.44$436K660K
2026-06-05Heidet FlorentChief Technology OfficerSell3K$24.95$75K6K
2026-06-05Berl Seth Jasonn/aSell4K$24.92$93K8K
2026-06-03Walker James JohnChief Executive OfficerSell25K$26.04$651K555K
2026-06-03Walker James JohnChief Executive OfficerSell71$29.91$2K580K
2026-06-03Walker James JohnChief Executive OfficerSell201$28.69$6K580K
2026-06-03Walker James JohnChief Executive OfficerSell3K$27.55$72K580K
2026-06-03Walker James JohnChief Executive OfficerSell26K$26.77$690K583K
2026-06-03Walker James JohnChief Executive OfficerOption exercise29K$0.00$0609K
2026-06-03Walker James JohnChief Executive OfficerSell1K$27.90$41K580K
2026-06-03Walker James JohnChief Executive OfficerSell22K$27.06$606K581K
2026-06-03Walker James JohnChief Executive OfficerSell46K$26.18$1.2M604K
2026-06-03Walker James JohnChief Executive OfficerOption exercise70K$3.00$210K650K
2026-06-03Yu JiangPresident and ChairmanSell700$29.91$21K8.2M
2026-06-03Yu JiangPresident and ChairmanSell500$28.89$14K8.2M
2026-06-03Yu JiangPresident and ChairmanSell1K$27.83$39K8.2M
2026-06-03Yu JiangPresident and ChairmanSell13K$27.07$353K8.2M
2026-06-03Yu JiangPresident and ChairmanSell30K$26.29$795K8.2M
2026-06-03Yu JiangPresident and ChairmanOption exercise46K$0.00$08.3M
2026-06-03Yu JiangPresident and ChairmanSell2K$29.91$62K8.2M
2026-06-03Yu JiangPresident and ChairmanSell1K$28.98$41K8.2M
2026-06-03Yu JiangPresident and ChairmanSell4K$27.83$112K8.2M
2026-06-03Yu JiangPresident and ChairmanSell67K$27.16$1.8M8.2M
2026-06-03Yu JiangPresident and ChairmanSell125K$26.30$3.3M8.3M
2026-06-03Yu JiangPresident and ChairmanOption exercise200K$3.00$600K8.4M
2026-06-03Yu JiangPresident and ChairmanSell5K$29.91$156K8.2M
2026-06-03Yu JiangPresident and ChairmanSell4K$28.98$103K8.2M
2026-06-03Yu JiangPresident and ChairmanSell10K$27.83$279K8.2M
2026-06-03Yu JiangPresident and ChairmanSell169K$27.16$4.6M8.2M
2026-06-03Yu JiangPresident and ChairmanSell313K$26.30$8.2M8.4M
2026-06-03Yu Kenny Joe Yungn/aOption exercise3K$0.00$018K
2026-06-03Law Tsun Yeen/aOption exercise3K$0.00$078K
2026-06-03I Financial Ventures Group LLCn/aSell2K$29.91$62K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell1K$28.98$41K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell4K$27.83$112K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell67K$27.16$1.8M8.2M
2026-06-03I Financial Ventures Group LLCn/aSell125K$26.30$3.3M8.3M
2026-06-03I Financial Ventures Group LLCn/aOption exercise200K$3.00$600K8.4M
2026-06-03I Financial Ventures Group LLCn/aSell5K$29.91$156K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell4K$28.98$103K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell10K$27.83$279K8.2M
2026-06-03I Financial Ventures Group LLCn/aSell169K$27.16$4.6M8.2M
2026-06-03I Financial Ventures Group LLCn/aSell313K$26.30$8.2M8.4M
2026-06-03Heidet FlorentChief Technology OfficerOption exercise9K$0.00$09K
2026-06-03Hare Diane Elizabethn/aSell100$27.84$3K100
2026-06-03Hare Diane Elizabethn/aSell1K$27.04$27K200
2026-06-03Hare Diane Elizabethn/aSell2K$26.31$59K1K

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 the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

3 Form 144 notices on file for NNE worth $9.6M at the prices reported; 3 in the last 90 days worth $9.6M. Latest: Walker James John filed on 2026-09-03 to sell 25,000 shares ($444K) from 2026-09-03.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-03Walker James JohnOfficer25K$444K0.047%2026-09-03UBS Financial Services Inc.
2026-09-01Walker James JohnOfficer25K$435K0.047%2026-09-01UBS Financial Services Inc.
2026-09-01I FINANCIAL VENTURES GROUP LLC10% Stockholder475K$8.7M0.884%2026-09-01Morgan Stanley Smith Barney LLC Executive Financial Services

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

13 holders above 5% have filed on NNE, all on Schedule 13G (passive). The largest reported stake is Jiang Yu at 17.5% of the class (9,224,000 shares), filed 2026-02-04 for an event on 2026-01-28.

FiledFormHolderSharesOf classEvent
2026-08-1413G/Ano. 1Van Eck Associates Corporationinvestment adviser3.8M7.3%2026-06-30
2026-07-2913G/Ano. 1BlackRock, Inc.parent holding company3.4M6.5%2026-06-30
2026-05-1513GGlobal X Management CO LLCinvestment adviser2.9M5.6%2026-03-31
2026-02-1713G/Ano. 1Kenneth Griffinparent holding company, individual2.0M3.9%2025-12-31
2026-02-1713G/Ano. 1Citadel Advisors Holdings LPparent holding company, partnership1.2M2.4%2025-12-31
2026-02-1713G/Ano. 1Citadel Advisors LLCinvestment adviser, parent holding company, other entity1.2M2.4%2025-12-31
2026-02-1713G/Ano. 1Citadel GP LLCparent holding company, other entity1.2M2.4%2025-12-31
2026-02-1713G/Ano. 1Citadel Securities LLCbroker-dealer, other entity746K1.5%2025-12-31
2026-02-1713G/Ano. 1Citadel Securities Group LPparent holding company, partnership759K1.5%2025-12-31
2026-02-1713G/Ano. 1Citadel Securities GP LLCparent holding company, other entity759K1.5%2025-12-31
2026-02-0413G/Ano. 2Jiang Yuindividual9.2M17.5%2026-01-28
2026-02-0413G/Ano. 2I Financial Ventures Group LLC.other entity8.9M17.1%2026-01-28
2026-01-0213G/Ano. 1Jiang Yuindividual10.1M19.6%2025-12-24
2026-01-0213G/Ano. 1I Financial Ventures Group LLC.other entity9.8M19.1%2025-12-24
2025-11-1213GVAN ECK ASSOCIATES CORPinvestment adviser2.6M6.3%2025-09-30
2025-10-2113GKenneth Griffinparent holding company, individual2.5M5.1%2025-10-14
2025-10-2113GCitadel Securities GP LLCparent holding company, other entity1.3M2.7%2025-10-14
2025-10-2113GCitadel Securities Group LPparent holding company, partnership1.3M2.7%2025-10-14
2025-10-2113GCitadel Securities LLCbroker-dealer, other entity1.3M2.5%2025-10-14
2025-10-2113GCitadel GP LLCparent holding company, other entity1.2M2.4%2025-10-14
2025-10-2113GCitadel Advisors Holdings LPparent holding company, partnership1.2M2.4%2025-10-14
2025-10-2113GCitadel Advisors LLCinvestment adviser, parent holding company, other entity1.2M2.4%2025-10-14
2025-10-1713GBlackRock, Inc.parent holding company2.2M5.4%2025-09-30

13F holders

Tracked managers holding NNE at their latest 13F. JSON

3 of the 30 tracked managers held NNE at their latest 13F, $36.6M in total at quarter-end prices. Citadel Advisors is the largest at $29.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 1 cut.

FundQuarterSharesValueOf portfolioChange in shares
Citadel Advisors2026-06-301.4M$29.9M0.00%+484K
D. E. Shaw & Co.2026-06-30185K$3.9M0.00%+35K
Two Sigma Investments2026-06-30135K$2.8M0.00%-154K

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

Nano Nuclear Energy Inc. 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows Nano Nuclear Energy Inc. (NNE), SEC CIK 1923891, listed on Nasdaq, classified by the SEC as electric services. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-14.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-03.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-08-14.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-03.JSON and CSV
Company record
EDGAR filing index for CIK 1923891Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 14 Sep 05:40 UTC.

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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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.

Datasets

Frequently Asked Questions

How much of NNE is sold short?
14,950,361 shares were held short at the 2026-08-31 settlement, 9.7 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 NNE's daily short volume?
On 2026-09-11, 723,024 of the 1,068,122 NNE shares reported to FINRA were sold short, 67.7% of the day's reported volume. Short volume is a flow for one day, not a position.
Does NNE have fails to deliver?
The SEC's latest file shows 97 NNE shares failed to deliver at settlement 2026-08-14. Fails are reported per settlement date and published twice a month with a lag.
Are NNE insiders buying or selling?
Insiders at NNE reported 4 open-market sells worth $9.2M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Walker James John (Chief Executive Officer) on 2026-09-03.
Have NNE insiders filed to sell?
3 Form 144 notices on file for NNE worth $9.6M at the prices reported; 3 in the last 90 days worth $9.6M. Latest: Walker James John filed on 2026-09-03 to sell 25,000 shares ($444K) from 2026-09-03.
Who owns more than 5% of NNE?
13 holders above 5% have filed on NNE, all on Schedule 13G (passive). The largest reported stake is Jiang Yu at 17.5% of the class (9,224,000 shares), filed 2026-02-04 for an event on 2026-01-28.
Which funds hold NNE?
3 of the 30 tracked managers held NNE at their latest 13F, $36.6M in total at quarter-end prices. Citadel Advisors is the largest at $29.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 1 cut.

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