| David R. Horn |
SEER |
Class A Common Stock |
Sale |
-1.52% |
$15,447 |
$1.99 |
-7,743 |
501,262 |
18 Feb 2026 |
Direct |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Sale |
-0.72% |
$48,646 |
$1.99 |
-24,385 |
3,349,064 |
18 Feb 2026 |
Direct |
| David R. Horn |
SEER |
Class A Common Stock |
Award |
18.4% |
|
|
79,000 |
509,005 |
03 Feb 2026 |
Direct |
| David R. Horn |
SEER |
Employee Stock Option (right to buy) |
Award |
|
|
|
119,000 |
119,000 |
03 Feb 2026 |
Direct |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Award |
26% |
|
|
697,162 |
3,373,449 |
03 Feb 2026 |
Direct |
| Omid Farokhzad |
SEER |
Employee Stock Option (right to buy) |
Award |
|
|
|
512,000 |
512,000 |
03 Feb 2026 |
Direct |
| Terrance Mcguire |
SEER |
Class A Common Stock |
Conversion of derivative security |
1.94% |
|
|
4,088 |
215,070 |
09 Dec 2025 |
See footnote |
| Terrance Mcguire |
SEER |
Class B Common Stock |
Conversion of derivative security |
-100% |
|
|
-4,088 |
0 |
09 Dec 2025 |
See footnote |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Conversion of derivative security |
|
|
|
2,117,138 |
2,117,138 |
09 Dec 2025 |
See footnote |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Conversion of derivative security |
116.1% |
|
|
1,438,057 |
2,676,287 |
09 Dec 2025 |
Direct |
| Omid Farokhzad |
SEER |
Class B Common Stock |
Conversion of derivative security |
-100% |
|
|
-2,117,138 |
0 |
09 Dec 2025 |
See footnote |
| Omid Farokhzad |
SEER |
Class B Common Stock |
Conversion of derivative security |
-100% |
|
|
-1,438,057 |
0 |
09 Dec 2025 |
Direct |
| David R. Horn |
SEER |
Class A Common Stock |
Sale |
-1.53% |
$13,400 |
$1.97 |
-6,797 |
436,802 |
19 Nov 2025 |
Direct |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Sale |
-2.66% |
$66,708 |
$1.97 |
-33,838 |
1,238,230 |
19 Nov 2025 |
Direct |
| Isaac Ro |
SEER |
Class A Common Stock |
Award |
|
|
|
41,000 |
41,000 |
02 Sep 2025 |
Direct |
| Isaac Ro |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
61,000 |
61,000 |
02 Sep 2025 |
Direct |
| David R. Horn |
SEER |
Class A Common Stock |
Sale |
-1.54% |
$13,955 |
$2.04 |
-6,827 |
436,802 |
20 Aug 2025 |
Direct |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Sale |
-2.6% |
$69,483 |
$2.04 |
-33,992 |
1,272,068 |
20 Aug 2025 |
Direct |
| Nicolas H. Roelofs PhD |
SEER |
Class A Common Stock |
Award |
29.5% |
|
|
17,083 |
74,996 |
07 Jul 2025 |
Direct |
| Nicolas H. Roelofs PhD |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
25,416 |
25,416 |
07 Jul 2025 |
Direct |
| Dipchand Nishar |
SEER |
Class A Common Stock |
Award |
41.7% |
|
|
20,500 |
69,704 |
07 Jul 2025 |
Direct |
| Dipchand Nishar |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
30,500 |
30,500 |
07 Jul 2025 |
Direct |
| Terrance Mcguire |
SEER |
Class A Common Stock |
Award |
22.4% |
|
|
20,500 |
112,066 |
07 Jul 2025 |
Direct |
| Terrance Mcguire |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
30,500 |
30,500 |
07 Jul 2025 |
Direct |
| Robert Langer |
SEER |
Class A Common Stock |
Award |
2.61% |
|
|
20,500 |
804,525 |
07 Jul 2025 |
Direct |
| Robert Langer |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
30,500 |
30,500 |
07 Jul 2025 |
Direct |
| Meeta Gulyani |
SEER |
Class A Common Stock |
Award |
23.6% |
|
|
20,500 |
107,543 |
07 Jul 2025 |
Direct |
| Meeta Gulyani |
SEER |
Stock Option (right to buy) |
Award |
|
|
|
30,500 |
30,500 |
07 Jul 2025 |
Direct |
| Dipchand Nishar |
SEER |
Class A Common Stock |
Sale |
-38.1% |
$62,935 |
$2.08 |
-30,253 |
49,204 |
13 Jun 2025 |
Direct |
| David R. Horn |
SEER |
Class A Common Stock |
Sale |
-1.5% |
$14,028 |
$2.08 |
-6,760 |
443,629 |
20 May 2025 |
Direct |
| Omid Farokhzad |
SEER |
Class A Common Stock |
Sale |
-2.51% |
$69,854 |
$2.08 |
-33,663 |
1,306,060 |
20 May 2025 |
Direct |