Operational - Quarterly Summary

 

Q2 
2026		Q1 
2026		Q4 
2025		Q3 
2025		Q2 
2025

Utilities

     
Natural gas deliveries – end use (Bcf) (1)16.166.847.28.916.4
Natural gas deliveries – transportation (Bcf) (1)26.242.130.823.420.7
Service sites (thousands) (2)1,5751,5781,5761,5671,567
Degree day variance from normal – SEMCO Gas (Michigan) (%) (3)(8.5)(0.6)6.3(13.3)3.6
Degree day variance from normal – Washington Gas (D.C.) (%) (3)(4)(5)(14.2)4.67.8(100.0)(31.1)
WGL retail energy marketing – gas sales volumes (Mmcf)8,58320,19217,64410,04611,572
WGL retail energy marketing – electricity sales volumes (GWh)3,6883,0703,3813,8403,575

Midstream

     
LPG export volumes (Bbls/d) (6)144,420124,917124,593133,147127,814
Total inlet gas processed (Mmcf/d) (6)1,3951,6691,5341,3741,531
Extracted ethane volumes (Bbls/d) (6)14,46322,17327,46925,29423,231
Extracted NGL volumes (Bbls/d) (6)(7)57,48658,58749,67443,62450,982
Fractionation volumes (Bbls/d) (6)(8)38,67345,47645,90843,03842,625
Frac spread – realized ($/Bbl) (6)(9)16.1413.8519.8522.2724.48
Frac spread – average spot price ($/Bbl) (6)(10)26.4817.9412.7923.7524.46
Propane Far East Index (FEI) to Mont Belvieu spread (US$/Bbl) (6)(11)31.4726.0113.5312.9110.15
Butane FEI to Mont Belvieu spread (US$/Bbl) (6)(12)36.3029.7514.5513.1911.57

Notes:

  1. Bcf is one billion cubic feet.
  2. Service sites reflect all of the service sites of the utilities, including transportation and non regulated business lines.
  3. A degree day is a measure of coldness determined daily as the number of degrees the average temperature during the day in question is below 65 degrees Fahrenheit. Degree days for a particular period are determined by adding the degree days incurred during each day of the period. Normal degree days for a particular period are the average of degree days during the prior 15 years for SEMCO and during the prior 30 years for Washington Gas. A positive number indicates that weather is colder than normal and a negative number indicates that weather is warmer than normal.
  4. In certain of Washington Gas’ jurisdictions (Virginia and Maryland) there are billing mechanisms in place which are designed to eliminate the effects of variance in customer usage caused by weather and other factors such as conservation. In D.C., there is no weather normalization billing mechanism nor does Washington Gas hedge to offset the effects of weather. As a result, colder or warmer weather will result in variances to financial results.
  5. The -100 percent degree day variance for Washington Gas in the third quarter of 2025 is a result of there being 12 normal degree days in the third quarter of any given year, compared to nil actual degree days in the third quarter of 2025. Given that the normal degree days in the third quarter are so low compared to other quarters, any change causes a large variance when shown as a percentage.
  6. Average for the period.
  7. NGL volumes refer to propane, butane and condensate.
  8. Fractionation volumes include NGL mix volumes processed.
  9. Realized frac spread or NGL margin, expressed in dollars per barrel of NGL, is derived from sales recorded by the segment during the period for frac spread exposed volumes plus the settlement value of frac hedges settled in the period less extraction premiums, divided by the total frac exposed volumes produced during the period.
  10. Average spot frac spread or NGL margin, expressed in dollars per barrel of NGL, is indicative of the average sales price that AltaGas receives for propane, butane, and condensate less extraction premiums, before accounting for hedges, divided by the respective frac spread exposed volumes for the period. 
  11. Average propane price spread between FEI and Mont Belvieu TET commercial index.
  12. Average butane price spread between FEI and Mont Belvieu TET commercial index.