MILLENNIUM MANAGEMENT LLC

PrivateCIK: 1273087
Location

NEW YORK, NY

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

Purchased 26.6% of their position (30.59K shares) and sold 2.2% of their position (3.25K shares) — review individual transaction dates and prices for directional context.

P · 11S · 6
InsiderMILLENNIUM MANAGEMENT LLCCIK 1273087
10% Owner
Since Mar 2026
+27.34K
Net shares
Net buyer
$89.4K
Total sold
17
Open market trades
11B · 6S
17
Total transactions
30.59K acquired · 3.25K disposed
Non-Derivative Transactions17

Common Stock

Indirect
P · Purchase

Shares

+778.00

Price / share

$27.23

Trade value

$21.18K

% of position

0.6%
3/26/2026
130.59K131.37K

Common Stock

Indirect
P · Purchase

Shares

+1.33K

Price / share

$27.95

Trade value

$37.09K

% of position

1.0%
3/26/2026
130.04K131.37K

Common Stock

Indirect
P · Purchase

Shares

+2.60K

Price / share

$28.85

Trade value

$75.05K

% of position

2.0%
3/26/2026
128.77K131.37K

Common Stock

Indirect
P · Purchase

Shares

+1.02K

Price / share

$29.98

Trade value

$30.73K

% of position

0.8%
3/26/2026
130.34K131.37K

Common Stock

Indirect
S · Sale

Shares

583.00

Price / share

$26.88

Trade value

$15.67K

% of position

0.4%
3/26/2026
131.95K131.37K

Common Stock

Indirect
S · Sale

Shares

1.27K

Price / share

$28.69

Trade value

$36.55K

% of position

1.0%
3/26/2026
132.64K131.37K

Common Stock

Indirect
P · Purchase

Shares

+10.64K

Price / share

$26.29

Trade value

$279.84K

% of position

8.1%
3/27/2026
131.72K142.36K

Common Stock

Indirect
P · Purchase

Shares

+4.38K

Price / share

$27.28

Trade value

$119.61K

% of position

3.2%
3/27/2026
137.98K142.36K

Common Stock

Indirect
P · Purchase

Shares

+294.00

Price / share

$28.13

Trade value

$8.27K

% of position

0.2%
3/27/2026
142.07K142.36K

Common Stock

Indirect
S · Sale

Shares

469.00

Price / share

$26.77

Trade value

$12.55K

% of position

0.3%
3/27/2026
142.83K142.36K

Common Stock

Indirect
S · Sale

Shares

36.00

Price / share

$27.37

Trade value

$985.28

% of position

0.0%
3/27/2026
142.40K142.36K

Common Stock

Indirect
P · Purchase

Shares

+2.99K

Price / share

$25.08

Trade value

$75.03K

% of position

2.1%
3/30/2026
142.69K145.68K

Common Stock

Indirect
P · Purchase

Shares

+5K

Price / share

$25.99

Trade value

$129.82K

% of position

3.6%
3/30/2026
140.68K145.68K

Common Stock

Indirect
P · Purchase

Shares

+1.18K

Price / share

$26.70

Trade value

$31.40K

% of position

0.8%
3/30/2026
144.50K145.68K

Common Stock

Indirect
P · Purchase

Shares

+370.00

Price / share

$27.68

Trade value

$10.24K

% of position

0.3%
3/30/2026
145.31K145.68K

Common Stock

Indirect
S · Sale

Shares

518.00

Price / share

$25.85

Trade value

$13.39K

% of position

0.4%
3/30/2026
146.20K145.68K

Common Stock

Indirect
S · Sale

Shares

370.00

Price / share

$27.68

Trade value

$10.24K

% of position

0.3%
3/30/2026
146.05K145.68K
Total

Net shares

+27.34K

Net value

$728.87K

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