Jul 12, 2019 | St. Louis Blues Acquire:
 Sum: $0$0$0 Change: $0$0$0 |  | Toronto Maple Leafs Acquire:
 Future Considerations Sum: $0$0$0 Change: $0$0$0 |
| Jun 22, 2019 | St. Louis Blues Acquire:
Sum: $0$0$0 Change: $0$0$0 | | Toronto Maple Leafs Acquire:
2020 7th round pick (STL) Sum: $0$0$0 Change: $0$0$0 |
| Feb 25, 2019 | Anaheim Ducks Acquire:
 Sum: $0$0$0 Change: -$2,250,000-$2,250,000$0 | | St. Louis Blues Acquire:
Sum: $2,250,000$2,250,000$2,250,000 Change: +$2,250,000+$2,250,000+$2,250,000 |
| Jan 4, 2019 | Anaheim Ducks Acquire:
Future Considerations Sum: $0$0$0 Change: $0-$650,000$0 | | St. Louis Blues Acquire:
Sum: $0$650,000$450,000 Change: $0+$650,000+$450,000 |
| Oct 1, 2018 | Edmonton Oilers Acquire:
 2020 conditional 6th round pick* (STL) *Conditions: The pick becomes a fifth round selection if Jeřábek appears in 50 or more regular season games for the Blues in 2018-19.
Result: The condition was not met. Oilers receive the 2020 6th round pick. Sum: $0$0$0 Change: -$1,000,000-$1,000,000$0 | | St. Louis Blues Acquire:
Sum: $1,000,000$1,000,000$1,000,000 Change: +$1,000,000+$1,000,000+$1,000,000 |
| Jul 1, 2018 | Buffalo Sabres Acquire:
 2021 2nd round pick (STL) *Conditions: If St. Louis' 2019 1st round pick ends up being a top 10 pick, the Blues have the option to keep the 2019 1st round pick and send Buffalo their 2020 1st round pick instead.
Result: Pick is not top 10, Buffalo receives the 2019 1st round pick. Sum: $8,275,000$8,275,000$9,125,000 Change: +$775,000+$775,000+$9,125,000 | | St. Louis Blues Acquire:
Sum: $7,500,000$7,500,000$8,500,000 Change: -$775,000-$775,000+$8,500,000 |
| Jun 22, 2018 | St. Louis Blues Acquire:
Sum: $0$0$0 Change: $0$0$0 | | Toronto Maple Leafs Acquire:
Sum: $0$0$0 Change: $0$0$0 |
| Feb 26, 2018 | St. Louis Blues Acquire:
2020 conditional 4th round pick** (WPG) *Conditions: If Winnipeg's 2018 1st round pick ends up being a top 3 pick, the Jets have the option to keep the 2018 1st round pick and send St. Louis their 2019 1st round pick instead.
Result: Blues receive Jets 2018 1st round pick. **Conditions: If Blues don't sign Foley before Aug. 16, 2019, then they receive Jets 4th rounder in 2020.
Result: Blues signed Foley. Jets retain the 2020 4th round pick Sum: $0$0$0 Change: -$3,500,000-$3,500,000-$3,750,000 | | Winnipeg Jets Acquire:
 Paul Stastny ($3,500,000 retained - 50%) · $3,500,000$3,500,000$3,750,000 Sum: $3,500,000$3,500,000$3,750,000 Change: +$3,500,000+$3,500,000+$3,750,000 |
| Feb 16, 2018 | St. Louis Blues Acquire:
Sum: $736,666$736,666$800,000 Change: +$736,666+$736,666+$800,000 | | Toronto Maple Leafs Acquire:
Sum: $0$0$0 Change: -$736,666-$736,666-$800,000 |
| Jun 23, 2017 | Philadelphia Flyers Acquire:
 *Conditions: If the 2018 draft pick becomes a top 10 pick, Blues have the option to move the pick to 2019. If the pick is moved to 2019, the Flyers will also receive a 2020 3rd round pick.
Result: Blues pick is not top 10. Flyers will receive St. Louis' 2018 1st round pick Sum: $4,700,000$4,700,000$4,700,000 Change: -$425,000-$425,000-$300,000 | | St. Louis Blues Acquire:
Sum: $5,125,000$5,125,000$5,000,000 Change: +$425,000+$425,000+$300,000 |
| Jun 23, 2017 | Pittsburgh Penguins Acquire:
 Sum: $1,125,000$1,125,000$1,125,000 Change: +$450,000+$450,000+$450,000 | | St. Louis Blues Acquire:
Sum: $675,000$675,000$675,000 Change: -$450,000-$450,000-$450,000 |
| Feb 27, 2017 | St. Louis Blues Acquire:
*Conditions: If Capitals re-sign Shattenkirk or advance to 2016/17 Eastern Conference Finals and if Shattenkirk plays in 50% of the first two rounds, Blues receive 2019 2nd round draft pick. If Capitals trade Shattenkirk on or before July 1, 2017; Blues receive a 7th round draft pick. However, should the return in a trade be a 4th round pick or earlier; instead of the 7th round pick, Blues receive next available pick two rounds later than the earliest pick received by the Capitals.
Result: Conditions not met. Capitals retain their 2019 2nd round pick. Sum: $875,000$1,450,000$1,450,000 Change: -$1,717,500-$1,851,250-$2,430,750 | | Washington Capitals Acquire:
 Sum: $2,592,500$3,301,250$3,880,750 Change: +$1,717,500+$1,851,250+$2,430,750 |
| Nov 19, 2016 | Pittsburgh Penguins Acquire:
 Sum: $0$575,000$175,000 Change: $0$0+$25,000 | | St. Louis Blues Acquire:
Sum: $0$575,000$150,000 Change: $0$0-$25,000 |
| Oct 7, 2016 | Edmonton Oilers Acquire:
*Conditions: Becomes a 2018 2nd round pick if Yakupov scores 15 or more goals in the 2016/17 NHL season.
Result: Yakupov did not score 15 goals in the 2016/17 season. Edmonton acquires Blues' 2017 3rd round pick. Sum: $0$663,333$70,000 Change: -$2,500,000-$1,836,667-$2,430,000 | | St. Louis Blues Acquire:
Sum: $2,500,000$2,500,000$2,500,000 Change: +$2,500,000+$1,836,667+$2,430,000 |
| Jul 2, 2016 | Buffalo Sabres Acquire:
Sum: $1,000,000$1,000,000$1,000,000 Change: +$1,000,000+$1,000,000+$1,000,000 | | St. Louis Blues Acquire:
Sum: $0$0$0 Change: -$1,000,000-$1,000,000-$1,000,000 |
| Jun 25, 2016 | Chicago Blackhawks Acquire:
 Sum: $0$0$0 Change: $0$0$0 | | St. Louis Blues Acquire:
Sum: $0$0$0 Change: $0$0$0 |
| Jun 24, 2016 | St. Louis Blues Acquire:
Sum: $0$0$0 Change: $0$0$0 | | Washington Capitals Acquire:
Sum: $0$0$0 Change: $0$0$0 |
| Jun 24, 2016 | Calgary Flames Acquire:
 Sum: $2,500,000$2,500,000$2,700,000 Change: +$2,500,000+$2,500,000+$2,700,000 | | St. Louis Blues Acquire:
*Conditions: St. Louis acquires Calgary's 2018 3rd round pick if Brian Elliott signs an extension with Calgary.
Result: Elliott did not sign an extension with Calgary. Flames retain their 2018 3rd round pick. Sum: $0$0$0 Change: -$2,500,000-$2,500,000-$2,700,000 |
| Mar 5, 2016 | Boston Bruins Acquire:
 Future Considerations Sum: $0$0$0 Change: $0-$863,333-$70,000 | | St. Louis Blues Acquire:
Sum: $0$863,333$70,000 Change: $0+$863,333+$70,000 |
| Feb 27, 2016 | Edmonton Oilers Acquire:
Sum: $0$655,833$67,500 Change: -$1,000,000-$344,167-$932,500 | | St. Louis Blues Acquire:
Sum: $1,000,000$1,000,000$1,000,000 Change: +$1,000,000+$344,167+$932,500 |
| Jan 15, 2016 | Detroit Red Wings Acquire:
 Future Considerations Sum: $0$0$0 Change: $0-$611,666-$60,000 | | St. Louis Blues Acquire:
Sum: $0$611,666$60,000 Change: $0+$611,666+$60,000 |
| Jul 2, 2015 | St. Louis Blues Acquire:
Sum: $4,371,667$4,371,667$4,517,500 Change: +$196,667+$196,667+$17,500 | | Washington Capitals Acquire:
Sum: $4,175,000$4,175,000$4,500,000 Change: -$196,667-$196,667-$17,500 |
| Jun 30, 2015 | San Jose Sharks Acquire:
 *Conditions: Unknown
Results: Conditions not met Sum: $0$0$0 Change: $0$0-$75,000 | | St. Louis Blues Acquire:
Sum: $0$0$75,000 Change: $0$0+$75,000 |
| Mar 2, 2015 | St. Louis Blues Acquire:
Sum: $2,500,000$2,500,000$2,500,000 Change: +$1,800,000+$1,800,000+$2,500,000 | | Toronto Maple Leafs Acquire:
 Sum: $700,000$700,000$700,000 Change: -$1,800,000-$1,800,000+$700,000 |
