2014-15: Sophomore middle-distance swimmer in the butterfly, IM and freestyle events who had a breakout season … Academic All-Big Ten … Through just the fall meets, had already broken every single one of her career-best times, some by more than four seconds … Finished the year ranked on Northwestern's top times list in five different events, sitting first in the 200 fly and 400 IM, third in the 500 free and 100 fly, and fourth in the 200 IM … Took down a 25-year-old school record in the 200 fly with an NCAA 'B' provisional qualifying time of 1:58.28 during the prelims of the AT&T U.S. Winter Nationals (12/3-12/6) … That time broke Lori Holmes' 1989 mark of 1:58.51 … Went on to finish 13th in the nation in the event with a 1:59.04 in the finals … Also swam a career-best and 'B' cut of 4:15.12 to finish 14th in the 400 IM at Nationals, placing herself third on NU's all-time top times list in the event at the same time … Two of her other career-best times in the fall came during NU's home TYR Invitational (11/21-11/23), where she swam a 55.52 in the prelims of the 100 fly (eventually finishing fifth) and a 4:49.31 to take fourth in the 500 free … At the 2015 Big Ten Championships, swam an NCAA 'B' time of 4:13.44 in the 400 IM to place 12th overall and move into second on NU's all-time top times list in the event … Placed 11th in the Big Ten in the 200 fly, though she could not quite replicate her school-record swim achieved at Winter Nationals … Also competed in the 500 free (32nd) at the B1G meet … Broke the Norris Aquatics Center pool record in the 200 fly during the TYR with a 1:58.70 to win the event, one of five top-five finishes at the meet for the sophomore … Her other top fives came in the 400 IM (second) and the 50 fly (fourth) … Swam a career-best 200 IM time of 2:05.31 at the Kentucky Quad Dual (11/7), then lowered that again in the winter with a 2:03.90 against Michigan and Notre Dame (1/10) … Had 19 top-three dual-meet event finishes on the season, including nine victories … Had six first-place results, one second-place effort and one third-place finish in dual-meet 200 fly races.
2013-14: Key part of young `Cats incoming freshman class ... Ranked on Northwestern's top times list in four different events, three individuals and one relay, including 100 fly, 200 fly, 400 IM and part of 400 medley relay team ... Posted No. 2 best time for NU in 100 fly with 56.87 time at TYR Invite (11/23) ... Led NU with the school's best time in 200 fly, posting 2:01.74 time vs. Wisconsin (11/15) ... Ranked No. 3 for NU in 400 time, swimming 4:19.85 at US Winter National Championships (12/7) ... Swam for NU's top 400 medley relay team, which posted 3:43.96 time at Big Tens ... Competed at US Winter National Championships in Greensboro, N.C. from Dec. 4-6 ... Reached finals of 400 IM at Winter Nationals and finished No. 14...Finished No. 35 in 200 fly ... Part of NU's 4x100 medley and 4x50 medley relay teams ... Also swam in 200 IM and 50 fly for NU ... Reached bonus final of 400 IM, with No. 24 finish in bonus swim ... Made college debut finishing No. 2 vs. Illinois/E. Mich. In both 100 fly and 200 fly ... Won 200 fly vs. WKU (10/25) ... Won 200 fly vs. UIC/Wyoming (11/9) ... Reached finals at TYR Invite of 200 IM, 400 IM, 100 fly, 50 fly and 200 fly ... Finished No. 2 in 200 fly (1/11) with Notre Dame/Michigan/Rutgers ... Swam in 200 fly and 400 IM at Shamrock Invite.
High School: 2012 Wisconsin state champion in the 500 free and runner-up in the 200 IM ... Led school to the 2012 Wisconsin Division Two championship one year after finishing runner-up ... Four-year Woodland Conference champion in the 100 fly and three year titlist in the 500 free ... Earned three sectional wins, capturing the 100 fly in 2010 and the 200 IM and 500 free in 2012 ... All-American in 2011, two-time All-State winner and 2011 Milwaukee Journal Sentinel All-Area Team choice ... Team MVP ... Rated as the No. 8 overall recruit in the state of Wisconsin by Collegeswimming.com ... Competed seven seasons with Shorewood Swim Club ... Speedo Junior National Championships qualifier in the spring and summer of 2012 ... Four-year high honor roll member ... National Honor Society ... 2011-12 Scholastic All-American.
Personal: Born Ellen Frances Stello ... Daughter of Michael and Christine Stello ... Chose Northwestern over Notre Dame and Rice ... Major is undeclared.
STELLO'S CAREER BESTS
| Event | Career Best |
| 100 butterfly | 55.52 |
| 200 butterfly | 1:58.28 |
| 200 individual medley | 2:03.90 |
| 400 individual medley | 4:13.44 |
| 500 freestyle | 4:49.31 |