Constellation Energy (CEG)
Constellation Energy on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as electric services.
11.8M
Short interest
settlement 2026-09-30
3.9
Days to cover
-0.3 days vs prior
59.6%
Short share of volume
2026-10-09
40
Fails to deliver
settlement 2026-09-11
Fri 6 Nov
Next earnings
estimated date
$418K
Insider flow, 90 days
1 buys, 0 sells
As of 2026-10-09.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in CEG is 11,837,140 shares, up 264,646 shares over the last month. Over the last 48 readings it ranged from 4,702,700 shares (31 October 2024) to 12,153,531 shares (30 June 2026). The latest reading sits at the top of that range. At the reported average volume of 3.0M shares a day that is 3.9 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/ceg" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 11,837,140 | +0.8% | 3,022,342 | 3.92 |
| 2026-09-15 | 11,740,256 | +1.4% | 2,779,480 | 4.22 |
| 2026-08-31 | 11,572,494 | +23.0% | 2,314,865 | 5.00 |
| 2026-08-14 | 9,408,275 | -9.8% | 2,817,270 | 3.34 |
| 2026-07-31 | 10,429,475 | -2.1% | 2,673,773 | 3.90 |
| 2026-07-15 | 10,654,877 | -12.3% | 3,512,945 | 3.03 |
| 2026-06-30 | 12,153,531 | +6.8% | 3,840,047 | 3.16 |
| 2026-06-15 | 11,380,943 | -1.8% | 4,885,748 | 2.33 |
| 2026-05-29 | 11,593,455 | +10.1% | 3,110,950 | 3.73 |
| 2026-05-15 | 10,532,940 | -0.2% | 3,539,435 | 2.98 |
| 2026-04-30 | 10,552,310 | +2.2% | 2,749,486 | 3.84 |
| 2026-04-15 | 10,323,327 | +8.1% | 2,697,495 | 3.83 |
| 2026-03-31 | 9,546,288 | +1.2% | 3,065,065 | 3.11 |
| 2026-03-13 | 9,435,816 | +10.1% | 3,030,701 | 3.11 |
| 2026-02-27 | 8,569,864 | +7.9% | 3,511,408 | 2.44 |
| 2026-02-13 | 7,943,497 | +5.6% | 4,727,066 | 1.68 |
| 2026-01-30 | 7,523,064 | +3.0% | 4,719,350 | 1.59 |
| 2026-01-15 | 7,303,522 | +17.7% | 3,081,902 | 2.37 |
| 2025-12-31 | 6,207,293 | -1.9% | 2,199,199 | 2.82 |
| 2025-12-15 | 6,324,828 | +3.1% | 2,137,373 | 2.96 |
| 2025-11-28 | 6,136,494 | -1.9% | 2,470,726 | 2.48 |
| 2025-11-14 | 6,253,159 | +26.6% | 3,055,446 | 2.05 |
| 2025-10-31 | 4,937,372 | -10.0% | 2,746,146 | 1.80 |
| 2025-10-15 | 5,484,873 | -19.5% | 2,862,771 | 1.92 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 9 October 2026, the short share of CEG volume is 59.6%, down 6.3 points over the last five sessions. Over the last 30 readings it ranged from 39.1% (21 September 2026) to 69.5% (30 September 2026). The latest reading is 2.5 points above the 30-session average of 57.1%, on 1.6M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-09 | 967K | 1.6M | 59.6% | 872 |
| 2026-10-08 | 1.5M | 2.9M | 52.4% | 752 |
| 2026-10-07 | 1.7M | 3.8M | 44.0% | 1,341 |
| 2026-10-06 | 3.1M | 6.0M | 51.4% | 51,640 |
| 2026-10-05 | 699K | 1.2M | 59.0% | 658 |
| 2026-10-02 | 975K | 1.5M | 65.9% | 6,563 |
| 2026-10-01 | 940K | 1.6M | 59.3% | 801 |
| 2026-09-30 | 1.1M | 1.7M | 69.5% | 128 |
| 2026-09-29 | 499K | 772K | 64.7% | 312 |
| 2026-09-28 | 511K | 776K | 65.8% | 916 |
| 2026-09-25 | 342K | 623K | 55.0% | 1,688 |
| 2026-09-24 | 393K | 655K | 60.0% | 2,835 |
| 2026-09-23 | 566K | 1.0M | 55.3% | 2,365 |
| 2026-09-22 | 541K | 865K | 62.5% | 1,173 |
| 2026-09-21 | 473K | 1.2M | 39.1% | 1,223 |
| 2026-09-18 | 548K | 997K | 54.9% | 429 |
| 2026-09-17 | 756K | 1.4M | 54.2% | 620 |
| 2026-09-16 | 526K | 1.0M | 51.6% | 16 |
| 2026-09-15 | 680K | 1.1M | 61.5% | 980 |
| 2026-09-14 | 967K | 1.5M | 64.6% | 1,005 |
| 2026-09-11 | 347K | 602K | 57.6% | 426 |
| 2026-09-10 | 335K | 673K | 49.7% | 184 |
| 2026-09-09 | 321K | 642K | 50.0% | 449 |
| 2026-09-08 | 501K | 925K | 54.1% | 210 |
| 2026-09-04 | 575K | 1.0M | 55.8% | 277 |
| 2026-09-03 | 603K | 1.2M | 51.0% | 99,152 |
| 2026-09-02 | 493K | 880K | 56.0% | 9 |
| 2026-09-01 | 535K | 842K | 63.6% | 127 |
| 2026-08-31 | 428K | 653K | 65.6% | 74 |
| 2026-08-28 | 361K | 618K | 58.4% | 1 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 11 September 2026, the fails-to-deliver balance in CEG is 40 shares, down 1,316 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (15 June 2026) to 113,232 shares (9 September 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-11 | 40 | $285.97 | $11K |
| 2026-09-10 | 1,356 | $293.91 | $399K |
| 2026-09-09 | 113,232 | $299.05 | $33.9M |
| 2026-09-08 | 63,516 | $298.96 | $19.0M |
| 2026-09-03 | 15,965 | $290.04 | $4.6M |
| 2026-08-28 | 656 | $282.41 | $185K |
| 2026-08-27 | 81 | $279.52 | $23K |
| 2026-08-18 | 372 | $278.20 | $103K |
| 2026-08-17 | 247 | $282.50 | $70K |
| 2026-08-12 | 5,180 | $278.36 | $1.4M |
| 2026-08-04 | 4,181 | $273.71 | $1.1M |
| 2026-08-03 | 16 | $262.75 | $4K |
| 2026-07-31 | 5 | $263.56 | $1K |
| 2026-07-30 | 5 | $257.95 | $1K |
| 2026-07-29 | 1,116 | $259.82 | $290K |
| 2026-07-27 | 261 | $274.35 | $72K |
| 2026-07-24 | 61 | $275.60 | $17K |
| 2026-07-23 | 2,668 | $274.90 | $733K |
| 2026-07-21 | 25 | $253.50 | $6K |
| 2026-07-20 | 25 | $252.39 | $6K |
| 2026-07-16 | 58,184 | $258.12 | $15.0M |
| 2026-07-15 | 60,451 | $256.43 | $15.5M |
| 2026-07-13 | 4,789 | $251.38 | $1.2M |
| 2026-07-10 | 469 | $250.74 | $118K |
| 2026-07-07 | 32 | $245.87 | $8K |
| 2026-07-02 | 12 | $236.50 | $3K |
| 2026-06-25 | 10 | $267.97 | $3K |
| 2026-06-24 | 159 | $270.26 | $43K |
| 2026-06-22 | 59,123 | $274.06 | $16.2M |
| 2026-06-15 | 2 | $253.76 | $508 |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONInsiders at CEG reported 1 open-market buy worth $418K in the last 90 days and no open-market sells. Latest filing: CRANDALL ROGER W (Director) on 2026-08-11.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-11 | CRANDALL ROGER W | Director | Buy | 2K | $278.62 | $418K | 2K |
| 2026-08-04 | CRANDALL ROGER W | Director | Grant | 462 | $267.25 | $123K | 462 |
| 2026-04-28 | Rimmer Nneka Louise | Director | Grant | 556 | $305.71 | $170K | 4K |
| 2026-04-28 | Richardson John M | Director | Grant | 556 | $305.71 | $170K | 16K |
| 2026-04-28 | Paterson Eileen P. | Director | Grant | 556 | $305.71 | $170K | 2K |
| 2026-04-28 | LAWLESS ROBERT J | Director | Grant | 556 | $305.71 | $170K | 51K |
| 2026-04-28 | Jamil Dhiaa M. | Director | Grant | 556 | $305.71 | $170K | 2K |
| 2026-04-28 | Holzrichter Julie | Director | Grant | 556 | $305.71 | $170K | 6K |
| 2026-04-28 | Harrington Charles L. | Director | Grant | 556 | $305.71 | $170K | 2K |
| 2026-04-28 | Halverson Bradley M | Director | Grant | 556 | $305.71 | $170K | 6K |
| 2026-04-28 | DE BALMANN YVES C | Director | Grant | 556 | $305.71 | $170K | 51K |
| 2026-04-28 | Ashish Khandpur K | Director | Grant | 556 | $305.71 | $170K | 6K |
| 2026-03-01 | Koehler Michael | EVP & Chief Admin Officer | Tax withholding | 8K | $329.88 | $2.5M | 53K |
| 2026-03-01 | Koehler Michael | EVP & Chief Admin Officer | Option exercise | 19K | price not stated in the filing | not stated | 61K |
| 2026-02-09 | Dominguez Joseph | President & CEO | Tax withholding | 83K | $272.15 | $22.6M | 214K |
| 2026-02-09 | Dominguez Joseph | President & CEO | Option exercise | 192K | price not stated in the filing | not stated | 297K |
| 2026-02-09 | Eggers Daniel L. | EVP & CFO | Disposition | 19K | $272.15 | $5.3M | 33K |
| 2026-02-09 | Eggers Daniel L. | EVP & CFO | Tax withholding | 21K | $272.15 | $5.8M | 52K |
| 2026-02-09 | Eggers Daniel L. | EVP & CFO | Option exercise | 45K | price not stated in the filing | not stated | 74K |
| 2026-02-09 | Dardis David O. | EVP & General Counsel | Disposition | 13K | $272.15 | $3.7M | 28K |
| 2026-02-09 | Dardis David O. | EVP & General Counsel | Tax withholding | 15K | $272.15 | $4.0M | 41K |
| 2026-02-09 | Dardis David O. | EVP & General Counsel | Option exercise | 31K | price not stated in the filing | not stated | 56K |
| 2026-02-09 | Dominguez Joseph | President & CEO | Disposition | 93K | $272.15 | $25.3M | 121K |
| 2026-02-09 | Smith Shane Patrick | EVP & Chief Financial Officer | Option exercise | 5K | price not stated in the filing | not stated | 7K |
| 2026-02-09 | Bauer Matthew N | SVP & Controller | Disposition | 4K | $272.15 | $1.1M | 6K |
| 2026-02-09 | Bauer Matthew N | SVP & Controller | Tax withholding | 3K | $272.15 | $937K | 10K |
| 2026-02-09 | Bauer Matthew N | SVP & Controller | Option exercise | 8K | price not stated in the filing | not stated | 13K |
| 2026-02-09 | MCHUGH JAMES | EVP & Chief Commercial Officer | Disposition | 17K | $272.15 | $4.6M | 58K |
| 2026-02-09 | MCHUGH JAMES | EVP & Chief Commercial Officer | Tax withholding | 14K | $272.15 | $3.8M | 75K |
| 2026-02-09 | MCHUGH JAMES | EVP & Chief Commercial Officer | Option exercise | 35K | price not stated in the filing | not stated | 89K |
| 2026-02-09 | Hanson Bryan Craig | EVP & Chief Generation Officer | Disposition | 27K | $272.15 | $7.2M | 66K |
| 2026-02-09 | Hanson Bryan Craig | EVP & Chief Generation Officer | Tax withholding | 22K | $272.15 | $6.0M | 92K |
| 2026-02-09 | Hanson Bryan Craig | EVP & Chief Generation Officer | Option exercise | 54K | price not stated in the filing | not stated | 114K |
| 2026-02-09 | Smith Shane Patrick | EVP & Chief Financial Officer | Disposition | 1K | $272.15 | $375K | 4K |
| 2026-02-09 | Smith Shane Patrick | EVP & Chief Financial Officer | Tax withholding | 2K | $272.15 | $557K | 5K |
| 2026-02-09 | Koehler Michael | EVP & Chief Admin Officer | Tax withholding | 9K | $272.15 | $2.5M | 54K |
| 2026-02-09 | Koehler Michael | EVP & Chief Admin Officer | Option exercise | 25K | price not stated in the filing | not stated | 64K |
| 2026-02-09 | Koehler Michael | EVP & Chief Admin Officer | Disposition | 13K | $272.15 | $3.5M | 42K |
| 2026-01-07 | Novotny Andrew R. | See Remarks | Grant | 299K | price not stated in the filing | not stated | 299K |
| 2025-10-29 | Barron Kathleen | EVP & Chief Strategy Officer | Option exercise | 23K | price not stated in the filing | not stated | 51K |
| 2025-10-29 | Barron Kathleen | EVP & Chief Strategy Officer | Tax withholding | 11K | $401.43 | $4.5M | 40K |
| 2025-04-29 | DE BALMANN YVES C | Director | Grant | 993 | $226.45 | $225K | 51K |
| 2025-04-29 | Richardson John M | Director | Grant | 993 | $226.45 | $225K | 16K |
| 2025-04-29 | Rimmer Nneka Louise | Director | Grant | 993 | $226.45 | $225K | 4K |
| 2025-04-29 | OPPENHEIMER PETER | Director | Grant | 993 | $226.45 | $225K | 1K |
| 2025-04-29 | Ashish Khandpur K | Director | Grant | 993 | $226.45 | $225K | 6K |
| 2025-04-29 | Halverson Bradley M | Director | Grant | 993 | $226.45 | $225K | 6K |
| 2025-04-29 | Holzrichter Julie | Director | Grant | 993 | $226.45 | $225K | 6K |
| 2025-04-29 | LAWLESS ROBERT J | Director | Grant | 993 | $226.45 | $225K | 51K |
| 2025-04-29 | Jamil Dhiaa M. | Director | Grant | 993 | $226.45 | $225K | 1K |
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.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON1 holder reports 5% or more of CEG in its latest filing, on Schedule 13G (passive). The holder is Vanguard Capital Management at 6.4% of the class (23,174,480 shares), filed 2026-04-29 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-07 | 13G/Ano. 1 | ECP ControlCo, LLCother entity | 14.4M | 4.0% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | Energy Capital Partners III, LLCother entity | 7.2M | 2.0% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP Calpine GP, LLCother entity | 5.7M | 1.6% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP Calpine Fund GP, LPpartnership | 5.7M | 1.6% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP Calpine Continuation Fund, LPpartnership | 4.7M | 1.3% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP Checkerspot Holdings, LPpartnership | 2.4M | 0.7% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP III-A Volt Holdings, LLCother entity | 2.3M | 0.7% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | Energy Capital Partners IV, LLCother entity | 1.5M | 0.4% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP III-C Volt Holdings, LPpartnership | 962K | 0.3% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP III-D Volt Holdings, LPpartnership | 1.2M | 0.3% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP IV-D Volt Holdings, LPpartnership | 765K | 0.2% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP III-B Volt Holdings, LLCother entity | 281K | 0.1% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP Calpine Rollover Fund, LPpartnership | 400K | 0.1% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP IV-A Volt Holdings, LPpartnership | 351K | 0.1% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP IV-C Volt Holdings, LPpartnership | 291K | 0.1% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP IV-B Volt Holdings, LPpartnership | 59K | 0.0% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 1 | ECP III Volt Holdings, LLCother entity | 69K | 0.0% | 2026-06-30 |
| 2026-05-14 | 13G/Ano. 3 | Capital International Investorsinvestment adviser | 11.9M | 3.3% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Capital Managementinvestment adviser | 23.2M | 6.4% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 3 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
13F holders
Tracked managers holding CEG at their latest 13F. JSON9 of the 30 tracked managers held CEG at their latest 13F, $1.32B in total at quarter-end prices. Coatue Management is the largest at $1.15B (2.4% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Coatue Management | 2026-06-30 | 4.6M | $1.15B | 2.37% | 0 |
| AQR Capital Management | 2026-06-30 | 397K | $98.6M | 0.03% | +151K |
| Citadel Advisors | 2026-06-30 | 192K | $47.6M | 0.01% | -217K |
| Millennium Management | 2026-06-30 | 55K | $13.7M | 0.01% | -162K |
| Bridgewater Associates | 2026-06-30 | 23K | $5.7M | 0.02% | -183K |
| D. E. Shaw & Co. | 2026-06-30 | 23K | $5.6M | 0.00% | -103K |
| Two Sigma Investments | 2026-06-30 | 4K | $980K | 0.00% | new |
| Soros Fund Management | 2026-06-30 | 3K | $809K | 0.01% | new |
| Fisher Asset Management | 2026-06-30 | 3K | $735K | 0.00% | +500 |
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
Constellation Energy 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 Constellation Energy (CEG), SEC CIK 1868275, 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 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 2026-10-09.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-11.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-07.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 2026-08-06.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 2026-08-11.JSON and CSV
- Company record
- EDGAR filing index for CIK 1868275Ticker, 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.
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Datasets
Frequently Asked Questions
How much of CEG is sold short?
What is CEG's daily short volume?
Does CEG have fails to deliver?
Are CEG insiders buying or selling?
Who owns 5% or more of CEG?
Which tracked 13F managers own CEG?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.