MASTROCOLA DAVID JOHN purchased 38.0% of their position (6.88K shares) of COOPER-STANDARD HOLDINGS INC. on the open market
Open‑market purchase worth $208.1K — a major conviction buy. The strongest form of insider conviction signal.
P · 3 purchases
Filed: 3/13/2026ACC: 0001515839-26-000002
Director
Since May 2019
+6.88K
Net shares
Net buyer
$208.1K
Total acquired
3
Open market trades
3B · 0S
3
Total transactions
6.88K acquired
Non-Derivative Transactions3
Common stock
Indirect
Shares
+2K
Price / share
$31.00
Trade value
$62K
% of position
11.0%
3/11/2026
18.11K→20.11K
Common stock
Indirect
Shares
+1.49K
Price / share
$30.25
Trade value
$45.19K
% of position
7.4%
3/12/2026
20.11K→21.61K
Common stock
Indirect
Shares
+3.39K
Price / share
$29.77
Trade value
$100.95K
% of position
15.7%
3/13/2026
21.61K→25K
Total
Net shares
+6.88K
Net value
$208.14K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common stock Indirect | 3/11/2026 | P · Purchase | +2K | $31.00 | $62K | 11.0% | 18.11K | 20.11K |
| Common stock Indirect | 3/12/2026 | P · Purchase | +1.49K | $30.25 | $45.19K | 7.4% | 20.11K | 21.61K |
| Common stock Indirect | 3/13/2026 | P · Purchase | +3.39K | $29.77 | $100.95K | 15.7% | 21.61K | 25K |
| Total | +6.88K | $208.14K | ||||||
Derivative Transactions0
No derivative transactions reported