XOOMAR

Net Power Inc. (NPWR)

Every FINRA and SEC series the site collects for Net Power Inc.: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as electrical industrial apparatus.

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3.2M

Short interest

settlement 2026-08-31

2.8

Days to cover

+6.1% vs prior

52.8%

Short share of volume

2026-09-11

3,028

Fails to deliver

settlement 2026-08-10

-$6.8M

Insider flow, 90 days

0 buys, 33 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 NPWR is 3,155,691 shares, up 478,854 shares over the last month. Over the last 48 readings it ranged from 2,111,680 shares (15 April 2026) to 6,232,068 shares (30 June 2025). At the reported average volume of 1.1M shares a day that is 2.8 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-313,155,691+6.1%1,127,3202.80
2026-08-142,973,284+11.1%845,5503.52
2026-07-312,676,837-8.9%672,4303.98
2026-07-152,937,200+32.4%729,4814.03
2026-06-302,218,873-7.8%935,8422.37
2026-06-152,406,382+4.4%769,2053.13
2026-05-292,305,374+3.6%790,7922.92
2026-05-152,224,914+5.3%1,148,1011.94
2026-04-302,112,914+0.1%675,2773.13
2026-04-152,111,680-1.0%474,8094.45
2026-03-312,132,939-6.9%762,0142.80
2026-03-132,291,270-4.6%911,9152.51
2026-02-272,402,195-13.0%764,9123.14
2026-02-132,760,739-17.5%860,7633.21
2026-01-303,347,044-7.5%886,0683.78
2026-01-153,618,870-7.9%791,7344.57
2025-12-313,928,630-2.1%1,227,0803.20
2025-12-154,014,524-6.4%775,1175.18
2025-11-284,288,715-6.9%1,373,9673.12
2025-11-144,604,918-10.1%1,562,6182.95
2025-10-315,123,349-1.8%2,332,5852.20
2025-10-155,219,367+9.6%2,844,8121.83
2025-09-304,762,291-6.9%1,339,1643.56
2025-09-155,113,423-0.2%702,2587.28

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of NPWR volume is 52.8%, down 7.8 points over the last five sessions. Over the last 52 readings it ranged from 40.8% (4 August 2026) to 81.3% (10 September 2026). The latest reading is 4.7 points below the 30-session average of 57.4%, on 326K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-11172K326K52.8%3,873
2026-09-10127K156K81.3%1,043
2026-09-09248K374K66.3%0
2026-09-08163K326K50.0%2,700
2026-09-04225K340K66.3%0
2026-09-0392K153K60.6%601
2026-09-02139K258K53.8%21
2026-09-01173K270K64.0%5
2026-08-31135K217K62.0%6,500
2026-08-28170K259K65.4%1,147
2026-08-27225K373K60.4%6,474
2026-08-26179K364K49.1%10,593
2026-08-25359K708K50.6%150
2026-08-241.2M2.2M54.9%8,583
2026-08-21127K207K61.4%0
2026-08-20136K227K60.0%6,536
2026-08-19130K187K69.3%0
2026-08-18284K528K53.7%45,897
2026-08-17307K589K52.2%20,395
2026-08-14782K1.7M47.2%11,565
2026-08-13227K382K59.4%570
2026-08-12116K243K47.8%0
2026-08-11114K201K57.0%3,791
2026-08-1078K160K48.7%0
2026-08-0755K121K45.6%2,000
2026-08-0661K126K48.6%0
2026-08-05109K196K55.6%0
2026-08-0488K216K40.8%900
2026-08-0360K87K69.0%318
2026-07-31103K151K68.2%4,092

Fails to deliver

SEC, by settlement date. JSON

As of 10 August 2026, the fails-to-deliver balance in NPWR is 3,028 shares, down 8,540 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (6 January 2026) to 35,182 shares (6 March 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-103,028$1.52$5K
2026-08-0511,568$1.54$18K
2026-08-0328,240$1.43$40K
2026-07-101,300$1.67$2K
2026-07-093$1.61$5
2026-06-306$1.67$10
2026-06-29173$1.64$284
2026-06-251,600$1.71$3K
2026-06-1542$1.70$71
2026-05-281,000$2.01$2K
2026-05-2776$2.05$156
2026-05-1915$1.98$30
2026-05-1815$2.13$32
2026-05-0839$2.05$80
2026-05-0619$2.04$39
2026-04-271,367$1.73$2K
2026-03-161,259$1.71$2K
2026-03-1328,376$1.87$53K
2026-03-1229,331$1.90$56K
2026-03-117,954$1.91$15K
2026-03-102,430$1.94$5K
2026-03-092,244$1.95$4K
2026-03-0635,182$2.01$71K
2026-03-0474$2.02$149
2026-03-034,134$2.12$9K
2026-03-02365$1.93$704
2026-02-2734$1.96$67
2026-02-261,682$1.90$3K
2026-02-2022$2.17$48
2026-02-03192$2.34$449

Insider trades

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

Insiders at NPWR reported 33 open-market sells worth $6.8M 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: 8 Rivers Capital, LLC on 2026-09-09.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-098 Rivers Capital, LLCn/aSell150K$1.84$276K750K
2026-09-088 Rivers Capital, LLCn/aSell100K$1.94$194K900K
2026-08-26NPEH, LLCn/aSell41K$1.91$79K1.0M
2026-08-268 Rivers Capital, LLCn/aSell41K$1.91$79K1.0M
2026-08-25NPEH, LLCn/aSell202K$1.91$384K1.0M
2026-08-258 Rivers Capital, LLCn/aSell202K$1.91$384K1.0M
2026-08-14NPEH, LLCn/aSell507K$1.95$991K1.2M
2026-08-148 Rivers Capital, LLCn/aSell507K$1.95$991K1.2M
2026-08-13NPEH, LLCn/aSell200K$1.62$324K1.8M
2026-08-138 Rivers Capital, LLCn/aSell200K$1.62$324K1.8M
2026-08-12NPEH, LLCn/aSell50K$1.63$82K1.9M
2026-08-128 Rivers Capital, LLCn/aSell50K$1.63$82K1.9M
2026-08-11NPEH, LLCn/aSell35K$1.60$56K2.0M
2026-08-118 Rivers Capital, LLCn/aSell35K$1.60$56K2.0M
2026-08-10NPEH, LLCn/aSell55K$1.55$86K2.0M
2026-08-108 Rivers Capital, LLCn/aSell55K$1.55$86K2.0M
2026-08-07NPEH, LLCn/aSell60K$1.53$92K2.1M
2026-08-078 Rivers Capital, LLCn/aSell60K$1.53$92K2.1M
2026-08-06NPEH, LLCn/aSell89K$1.51$134K2.2M
2026-08-068 Rivers Capital, LLCn/aSell89K$1.51$134K2.2M
2026-08-05NPEH, LLCn/aSell140K$1.51$211K2.2M
2026-08-058 Rivers Capital, LLCn/aSell140K$1.51$211K2.2M
2026-08-04NPEH, LLCn/aSell120K$1.54$185K2.4M
2026-08-048 Rivers Capital, LLCn/aSell120K$1.54$185K2.4M
2026-07-30NPEH, LLCn/aSell155K$1.43$221K2.5M
2026-07-308 Rivers Capital, LLCn/aSell155K$1.43$221K2.5M
2026-07-29NPEH, LLCn/aSell45K$1.41$63K2.7M
2026-07-298 Rivers Capital, LLCn/aSell45K$1.41$63K2.7M
2026-07-28NPEH, LLCn/aSell56K$1.47$82K2.7M
2026-07-288 Rivers Capital, LLCn/aSell56K$1.47$82K2.7M
2026-07-238 Rivers Capital, LLCn/aSell39K$1.51$59K2.8M
2026-07-228 Rivers Capital, LLCn/aSell90K$1.53$137K2.8M
2026-07-218 Rivers Capital, LLCn/aSell80K$1.53$122K2.9M
2026-06-03PETERSON CAROL R.n/aGrant72K$0.00$0176K
2026-06-03Veltmann Alejandran/aGrant72K$0.00$0176K
2026-06-03Kelliher Joseph Tn/aGrant72K$0.00$0176K
2026-06-03Alexander Ralphn/aGrant72K$0.00$0176K
2026-05-13BEAUCHAMP DAMIAN R.TenPercentOwnerSell35K$2.43$85K3.0M
2026-05-13NPEH, LLCn/aSell35K$2.43$85K3.0M
2026-05-138 Rivers Capital, LLCn/aSell35K$2.43$85K3.0M
2026-05-12BEAUCHAMP DAMIAN R.TenPercentOwnerSell400K$2.44$976K3.0M
2026-05-12NPEH, LLCn/aSell400K$2.44$976K3.0M
2026-05-128 Rivers Capital, LLCn/aSell400K$2.44$976K3.0M
2026-03-068 Rivers Capital, LLCTenPercentOwnerJ3.0Mn/an/a17.7M
2026-03-068 Rivers Capital, LLCTenPercentOwnerConversion3.0Mn/an/a3.4M
2026-03-06NPEH, LLCTenPercentOwnerJ3.0Mn/an/a17.7M
2026-03-06NPEH, LLCTenPercentOwnerConversion3.0Mn/an/a3.4M
2026-03-06NPEH, LLCTenPercentOwnerJ3.0Mn/an/a17.7M
2026-03-06NPEH, LLCTenPercentOwnerConversion3.0Mn/an/a3.4M
2026-03-068 Rivers Capital, LLCTenPercentOwnerConversion3.0Mn/an/a3.4M

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.

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

10 holders above 5% have filed on NPWR, 10 on Schedule 13D (active intent). The largest reported stake is 8 Rivers Capital, LLC at 23.5% of the class (24,568,533 shares), filed 2025-11-04 for an event on 2025-11-02.

FiledFormHolderSharesOf classEvent
2026-08-1713D/Ano. 128 RIVERS CAPITAL, LLCother entity19.0M17.9%2026-08-13
2026-08-1713D/Ano. 12NPEH, LLCother entity19.0M17.9%2026-08-13
2026-08-1713D/Ano. 12DAMIAN BEAUCHAMPindividual19.0M17.9%2026-08-13
2026-08-1713D/Ano. 128RCH, LLCother entity00.0%2026-08-13
2026-05-1413D/Ano. 118RCH, LLCother entity20.7M19.5%2026-05-12
2026-05-1413D/Ano. 118 RIVERS CAPITAL, LLCother entity20.7M19.5%2026-05-12
2026-05-1413D/Ano. 11NPEH, LLCother entity20.7M19.5%2026-05-12
2026-05-1413D/Ano. 11Damian Beauchampindividual20.7M19.5%2026-05-12
2026-01-2813D/Ano. 108 RIVERS CAPITAL, LLCother entity22.0M21.0%2026-01-26
2026-01-2813D/Ano. 10NPEH, LLCother entity22.0M21.0%2026-01-26
2026-01-2813D/Ano. 10Damian Beauchampindividual22.0M21.0%2026-01-26
2026-01-2813D/Ano. 108RCH, LLCother entity22.0M21.0%2026-01-26
2025-12-0913D/Ano. 98RCH, LLCother entity23.3M22.3%2025-12-05
2025-12-0913D/Ano. 98 RIVERS CAPITAL, LLCother entity23.3M22.3%2025-12-05
2025-12-0913D/Ano. 9NPEH, LLCother entity23.3M22.3%2025-12-05
2025-12-0913D/Ano. 9Damian Beauchampindividual23.3M22.3%2025-12-05
2025-11-0413D/Ano. 88 Rivers Capital, LLCother entity24.6M23.5%2025-11-02
2025-11-0413D/Ano. 8NPEH, LLCother entity24.6M23.5%2025-11-02
2025-11-0413D/Ano. 8Damian Beauchampindividual24.6M23.5%2025-11-02
2025-11-0413D/Ano. 88RCH, LLCother entity24.6M23.5%2025-11-02
2025-11-0413D/Ano. 8Cynda Beauchampother entity00.0%2025-11-02
2025-10-2913D/Ano. 78 Rivers Capital, LLCother entity24.7M23.6%2025-10-27
2025-10-2913D/Ano. 7Damian Beauchampindividual24.7M23.6%2025-10-27
2025-10-2913D/Ano. 78RCH, LLCother entity24.7M23.6%2025-10-27
2025-10-2913D/Ano. 7Cynda Beauchampindividual24.7M23.6%2025-10-27
2025-10-2913D/Ano. 7NPEH, LLCother entity24.7M23.6%2025-10-27
2025-10-2913D/Ano. 7ARECA, INC.other entity00.0%2025-10-27
2025-10-2913D/Ano. 7TILLANDSIA, INC.other entity00.0%2025-10-27
2025-10-2913D/Ano. 7CHAMAEDOREA, INC.other entity00.0%2025-10-27

13F holders

Tracked managers holding NPWR at their latest 13F. JSON

7 of the 30 tracked managers held NPWR at their latest 13F, $3.3M in total at quarter-end prices. Two Sigma Investments is the largest at $1.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 5 cut.

FundQuarterSharesValueOf portfolioChange in shares
Two Sigma Investments2026-06-30661K$1.1M0.00%-420K
D. E. Shaw & Co.2026-06-30413K$689K0.00%+397K
AQR Capital Management2026-06-30385K$643K0.00%+232K
Renaissance Technologies2026-06-30354K$592K0.00%-350K
Citadel Advisors2026-06-30151K$253K0.00%-222K
Point72 Asset Management2026-06-3015K$26K0.00%-19K
D. E. Shaw & Co.2026-06-3015K$4K0.00%-397K

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.

Financials

SEC XBRL, as filed. JSON

In FY 2025 it generated -$120.8M of operating cash flow.

Cash
$117.9M
Total assets
$338.3M

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30n/a-$80.3Mn/a-0.91
Q1 20262026-03-31n/a-$9.9Mn/a-0.12
Q4 2025derived2025-12-31$0-$19.6Mn/an/a
Q3 20252025-09-30$0-$411.5Mn/a-5.28
Q2 20252025-06-30$0-$28.1Mn/a-0.36
Q1 20252025-03-31$0-$119.3Mn/a-1.55
Q4 2024derived2024-12-31$0-$34.3Mn/an/a
Q3 20242024-09-30$12K$818K6816.7%0.01

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$0-$578.6M-$120.8M$33.2Mn/an/a
FY 20242024-12-31$250K-$49.2M-$31.6M$68.7Mn/an/a
FY 20222022-12-31$580K-$54.8M-$16.6M$115Kn/an/a
FY 20212021-12-31n/a-$9.8M-$1.3Mn/an/an/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30.

What this page is

Net Power 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 Net Power Inc. (NPWR), SEC CIK 1845437, listed on NYSE, classified by the SEC as electrical industrial apparatus. 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 2026-08-10.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 2026-08-17.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
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. 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 2026-09-09.JSON and CSV
Company record
EDGAR filing index for CIK 1845437Ticker, 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 NPWR is sold short?
3,155,691 shares were held short at the 2026-08-31 settlement, 2.8 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 NPWR's daily short volume?
On 2026-09-11, 171,899 of the 325,855 NPWR shares reported to FINRA were sold short, 52.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does NPWR have fails to deliver?
The SEC's latest file shows 3,028 NPWR shares failed to deliver at settlement 2026-08-10. Fails are reported per settlement date and published twice a month with a lag.
Are NPWR insiders buying or selling?
Insiders at NPWR reported 33 open-market sells worth $6.8M 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: 8 Rivers Capital, LLC on 2026-09-09.
Who owns more than 5% of NPWR?
10 holders above 5% have filed on NPWR, 10 on Schedule 13D (active intent). The largest reported stake is 8 Rivers Capital, LLC at 23.5% of the class (24,568,533 shares), filed 2025-11-04 for an event on 2025-11-02.
What did NPWR report last quarter?
In FY 2025 it generated -$120.8M of operating cash flow.
Which funds hold NPWR?
7 of the 30 tracked managers held NPWR at their latest 13F, $3.3M in total at quarter-end prices. Two Sigma Investments is the largest at $1.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 5 cut.

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