A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 8 filings in this group are Form 4s for BorgWarner Inc.
The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.
Across the 8 insider filings shown, the breakdown is 7 open-market sale and 1 open-market purchase. 8 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.
Form 4
Open-market sale
Insider Selling
2026-09-01
BWA insider Hanley Michael S (Director) sold 5,000 shares (~$327.6K)
Hanley Michael S, listed as Director at BORGWARNER INC, reported an open-market sale of 5,000 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
5,000 |
$65.51 |
$327.6K |
Filing: Form 4 (Insider Transaction)
Insider: Hanley Michael S (Director)
Shares: 5,000
Est. Value: $327.6K
Form 4
Open-market sale
Insider Selling
2026-08-25
BWA insider CALAWAY TONIT M (EVP, CAO, Gen Counsel & Sec) sold 22,000 shares (~$1.46M)
CALAWAY TONIT M, listed as EVP, CAO, Gen Counsel & Sec at BORGWARNER INC, reported an open-market sale of 22,000 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
22,000 |
$66.26 |
$1.46M |
Filing: Form 4 (Insider Transaction)
Insider: CALAWAY TONIT M (EVP, CAO, Gen Counsel & Sec)
Shares: 22,000
Est. Value: $1.46M
Form 4
Open-market purchase
Insider Buying
2026-08-20
BWA insider Kalathur Rajesh (Director) bought 7,407 shares (~$500.7K)
Kalathur Rajesh, listed as Director at BORGWARNER INC, reported an open-market purchase of 7,407 BWA shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
P |
Open-market purchase
|
7,407 |
$67.59 |
$500.7K |
Filing: Form 4 (Insider Transaction)
Insider: Kalathur Rajesh (Director)
Shares: 7,407
Est. Value: $500.7K
Form 4
Open-market sale
Insider Selling
2026-08-20
BWA insider Kulikowski Amy B. (VP & Chief Accounting Officer) sold 2,900 shares (~$198.9K)
Kulikowski Amy B., listed as VP & Chief Accounting Officer at BORGWARNER INC, reported an open-market sale of 2,900 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
2,900 |
$68.60 |
$198.9K |
Filing: Form 4 (Insider Transaction)
Insider: Kulikowski Amy B. (VP & Chief Accounting Officer)
Shares: 2,900
Est. Value: $198.9K
Form 4
Open-market sale
Insider Selling
2026-08-18
BWA insider Demmerle Stefan (Vice President) sold 1,000 shares (~$70.0K)
Demmerle Stefan, listed as Vice President at BORGWARNER INC, reported an open-market sale of 1,000 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
1,000 |
$70.00 |
$70.0K |
Filing: Form 4 (Insider Transaction)
Insider: Demmerle Stefan (Vice President)
Shares: 1,000
Est. Value: $70.0K
Form 4
Open-market sale
Insider Selling
2026-08-18
BWA insider CALAWAY TONIT M (EVP, CAO, Gen Counsel & Sec) sold 44,000 shares (~$3.06M)
CALAWAY TONIT M, listed as EVP, CAO, Gen Counsel & Sec at BORGWARNER INC, reported an open-market sale of 44,000 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
17,376 |
$69.97 |
$1.22M |
S |
Open-market sale
|
26,624 |
$69.44 |
$1.85M |
Filing: Form 4 (Insider Transaction)
Insider: CALAWAY TONIT M (EVP, CAO, Gen Counsel & Sec)
Shares: 44,000
Est. Value: $3.06M
Form 4
Open-market sale
Insider Selling
2026-08-18
BWA insider McKenzie Isabelle (Vice President) sold 4,500 shares (~$316.8K)
McKenzie Isabelle, listed as Vice President at BORGWARNER INC, reported an open-market sale of 4,500 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
4,500 |
$70.39 |
$316.8K |
Filing: Form 4 (Insider Transaction)
Insider: McKenzie Isabelle (Vice President)
Shares: 4,500
Est. Value: $316.8K
Form 4
Open-market sale
Insider Selling
2026-08-18
BWA insider McAlmont Shaun (Director) sold 7,000 shares (~$485.5K)
McAlmont Shaun, listed as Director at BORGWARNER INC, reported an open-market sale of 7,000 BWA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
7,000 |
$69.36 |
$485.5K |
Filing: Form 4 (Insider Transaction)
Insider: McAlmont Shaun (Director)
Shares: 7,000
Est. Value: $485.5K