Brian J. Callaghan serves as Executive at ON ASSIGNMENT INC, where they oversee executive responsibilities. Since joining the company, Brian J. Callaghan has executed 48 insider transactions totaling $88.4M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 2, 2026 involved receiving (via award) 4,500 shares valued at $210.0K.
Brian J. Callaghan currently holds 7,698 shares of ON ASSIGNMENT INC (ASGN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Brian J. Callaghan has been a net seller of ASGN stock. They have purchased $1.0M and sold $87.3M worth of shares.
Brian J. Callaghan's most recent insider trade was on Jan 2, 2026, when they sold 4,500 shares at $46.66 per share.
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| $95.67 |
| Discretionary |
| Jan 3, 2023 | ASGN | $185.0K | Award | 2,243 | $82.46 | Discretionary |
| Jan 3, 2022 | ASGN | $150.0K | Award | 1,209 | $124.06 | Discretionary |
| Jan 4, 2021 | ASGN | $149.9K | Award | 1,861 | $80.56 | Discretionary |
| Nov 24, 2020 | ASGN | $4.4M | Sale | 53,190 | $82.29 | Discretionary |
| Nov 23, 2020 | ASGN | $1.8M | Sale | 21,810 | $82.51 | Discretionary |
| Jan 2, 2020 | ASGN | $150.0K | Award | 2,107 | $71.19 | Discretionary |
| Jan 2, 2019 | ASGN | $125.0K | Award | 2,301 | $54.31 | Discretionary |
| Nov 5, 2018 | ASGN | $1.0M | Purchase | 15,000 | $68.03 | Discretionary |
| Jan 26, 2018 | ASGN | $1.4M | Sale | 20,440 | $69.00 | Discretionary |
| Jan 25, 2018 | ASGN | $11.4K | Sale | 165 | $69.00 | Discretionary |
| Dec 22, 2017 | ASGN | $0 | Award | 816 | $N/A | Discretionary |
| Nov 28, 2017 | ASGN | $1.3M | Sale | 20,250 | $64.00 | Discretionary |
| Oct 26, 2017 | ASGN | $1.2M | Sale | 20,250 | $59.04 | Discretionary |
| Aug 1, 2017 | ASGN | $0 | Award | 2,557 | $N/A | Discretionary |
| Jun 20, 2017 | ASGN | $1.1M | Sale | 20,250 | $54.02 | Discretionary |
| Mar 10, 2017 | ASGN | $376.4K | Sale | 8,000 | $47.05 | Discretionary |
| Mar 8, 2017 | ASGN | $320.1K | Sale | 6,810 | $47.00 | Discretionary |
| Mar 7, 2017 | ASGN | $100.1K | Sale | 2,130 | $47.01 | Discretionary |
| Mar 6, 2017 | ASGN | $545.4K | Sale | 11,600 | $47.02 | Discretionary |
| Mar 3, 2017 | ASGN | $26.3K | Sale | 560 | $47.00 | Discretionary |
| Mar 2, 2017 | ASGN | $813.4K | Sale | 17,262 | $47.12 | Discretionary |
| Mar 1, 2017 | ASGN | $2.0M | Sale | 41,072 | $47.88 | Discretionary |
| Feb 28, 2017 | ASGN | $1.1M | Sale | 22,566 | $47.41 | Discretionary |
| Aug 1, 2016 | ASGN | $0 | Award | 3,406 | $N/A | Discretionary |
| Nov 17, 2015 | ASGN | $534.8K | Sale | 11,500 | $46.50 | Discretionary |
| Nov 16, 2015 | ASGN | $915.7K | Sale | 20,112 | $45.53 | Discretionary |
| Nov 13, 2015 | ASGN | $2.1M | Sale | 46,000 | $45.54 | Discretionary |
| Nov 12, 2015 | ASGN | $892.6K | Sale | 19,800 | $45.08 | Discretionary |