MILLENNIUM MANAGEMENT LLC

PrivateCIK: 1273087
Location

NEW YORK, NY

MILLENNIUM MANAGEMENT LLC made both purchases and sales at SENSEI BIOTHERAPEUTICS, INC.

Purchased 9.0% of their position (12.18K shares) and sold 1.8% of their position (2.74K shares) — review individual transaction dates and prices for directional context.

P · 10S · 7
InsiderMILLENNIUM MANAGEMENT LLCCIK 1273087
10% Owner
Since Mar 2026
+9.44K
Net shares
Net buyer
$76.9K
Total sold
17
Open market trades
10B · 7S
17
Total transactions
12.18K acquired · 2.74K disposed
Non-Derivative Transactions17

Common Stock

Indirect
P · Purchase

Shares

+616.00

Price / share

$24.69

Trade value

$15.21K

% of position

0.4%
3/31/2026
146.04K146.66K

Common Stock

Indirect
P · Purchase

Shares

+1.77K

Price / share

$25.32

Trade value

$44.82K

% of position

1.2%
3/31/2026
144.89K146.66K

Common Stock

Indirect
P · Purchase

Shares

+1.05K

Price / share

$26.73

Trade value

$28.01K

% of position

0.7%
3/31/2026
145.61K146.66K

Common Stock

Indirect
P · Purchase

Shares

+17.00

Price / share

$27.78

Trade value

$472.32

% of position

0.0%
3/31/2026
146.64K146.66K

Common Stock

Indirect
P · Purchase

Shares

+186.00

Price / share

$30.48

Trade value

$5.67K

% of position

0.1%
3/31/2026
146.47K146.66K

Common Stock

Indirect
P · Purchase

Shares

+1.96K

Price / share

$31.45

Trade value

$61.55K

% of position

1.4%
3/31/2026
144.70K146.66K

Common Stock

Indirect
P · Purchase

Shares

+411.00

Price / share

$32.60

Trade value

$13.40K

% of position

0.3%
3/31/2026
146.25K146.66K

Common Stock

Indirect
S · Sale

Shares

191.00

Price / share

$24.28

Trade value

$4.64K

% of position

0.1%
3/31/2026
146.85K146.66K

Common Stock

Indirect
S · Sale

Shares

1.25K

Price / share

$25.17

Trade value

$31.48K

% of position

0.8%
3/31/2026
147.91K146.66K

Common Stock

Indirect
S · Sale

Shares

57.00

Price / share

$27.11

Trade value

$1.55K

% of position

0.0%
3/31/2026
146.71K146.66K

Common Stock

Indirect
S · Sale

Shares

5.00

Price / share

$28.41

Trade value

$142.03

% of position

0.0%
3/31/2026
146.66K146.66K

Common Stock

Indirect
S · Sale

Shares

87.00

Price / share

$31.52

Trade value

$2.74K

% of position

0.1%
3/31/2026
146.74K146.66K

Common Stock

Indirect
P · Purchase

Shares

+1.16K

Price / share

$31.53

Trade value

$36.61K

% of position

0.8%
4/1/2026
146.57K147.73K

Common Stock

Indirect
P · Purchase

Shares

+1.61K

Price / share

$34.59

Trade value

$55.79K

% of position

1.1%
4/1/2026
146.12K147.73K

Common Stock

Indirect
P · Purchase

Shares

+3.40K

Price / share

$35.46

Trade value

$120.58K

% of position

2.4%
4/1/2026
144.33K147.73K

Common Stock

Indirect
S · Sale

Shares

1.10K

Price / share

$31.52

Trade value

$34.80K

% of position

0.7%
4/1/2026
148.84K147.73K

Common Stock

Indirect
S · Sale

Shares

46.00

Price / share

$34.75

Trade value

$1.60K

% of position

0.0%
4/1/2026
147.78K147.73K
Total

Net shares

+9.44K

Net value

$305.15K

Derivative Transactions0
No derivative transactions reported
MILLENNIUM MANAGEMENT LLC — Insider Transaction (Form 4) Filed May 15, 2026 | Finecho