Form 13-F position report

SURROZEN INC

Reported by RA CAPITAL MANAGEMENT L P

Company profile Manager portfolio Source filing
SRZN CUSIP 86889P208 Manager CIK 0001346824
Latest reported change

Reported 679,130 shares, up 396,550 (140.3%) from the prior quarter.

Reported value 95.3%; share count 140.3% vs. the prior quarter.

Added
% of reported 13F value 0.13% This manager · Q1 2025
Shares 679,130 Quarter-end amount reported
Reported value $7,918,656 Fair value at quarter end
Consecutive quarters held 4 Through Q1 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

7 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q4 2025 Reduced 0 -602,626 (-100.0%) 0 $0 2026-02-17
Q3 2025 Unchanged 602,626 0 (0.0%) 0.1% $7,764,836 2025-11-14
Q2 2025 Reduced 602,626 -76,504 (-11.3%) 0.09% $5,387,476 2025-08-14
Q1 2025 Added 679,130 +396,550 (140.3%) 0.13% $7,918,656 2025-05-15
Q4 2024 Unchanged 282,580 0 (0.0%) 0.05% $4,055,023 2025-02-14
Q3 2024 Unchanged 282,580 0 (0.0%) 0.04% $3,385,308 2024-11-14
Q2 2024 New 282,580 +282,580 (0.0%) 0.04% $3,094,251 2024-08-14
Institutional context

Who else reported the position

31 managers reported SURROZEN INC for Q1 2025.

Manager Activity Shares Change % of reported 13F Reported value Tenure
RA CAPITAL MANAGEMENT L P This report Added 679,130 +396,550 0.13% $7,918,656 4 qtrs
VR Adviser LLC New 632,931 +632,931 0.63% $7,379,975 1 qtr
5AM Venture Management LLC New 310,000 +310,000 1.37% $3,614,600 1 qtr
Stonepine Capital Management LLC Added 285,782 +148,582 3.24% $3,332,218 4 qtrs
Vivo Capital LLC New 260,000 +260,000 0.4% $3,031,600 1 qtr
Samsara BioCapital LLC New 241,400 +241,400 0.5% $2,814,724 1 qtr
STEMPOINT CAPITAL LP Reduced 240,826 -109,747 0.9% $2,808,031 4 qtrs
Nantahala Capital Management LLC Added 229,527 +33,504 0.11% $2,676,285 4 qtrs
DRIEHAUS CAPITAL MANAGEMENT LLC New 204,934 +204,934 0.02% $2,389,530 1 qtr
ACUTA CAPITAL PARTNERS LLC New 170,000 +170,000 2.3% $1,982,200 1 qtr
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Filing details and methodology As reported
Report period
March 31, 2025
Filed
May 15, 2025
Filing type
13F-HR
Position type
SH

Voting authority reported

Sole
679,130
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.