Form 13-F position report

CABALETTA BIO INC

Reported by FRED ALGER MANAGEMENT LLC

Company profile Manager portfolio Source filing
CABA CUSIP 12674W109 Manager CIK 0000003520
Latest reported change

Reported 0 shares, down 214,721 (100.0%) from the prior quarter.

Reported value -100.0%; share count -100.0% vs. the prior quarter.

Reduced
% of reported 13F value 0 This manager · Q4 2021
Shares 0 Quarter-end amount reported
Reported value $0 Fair value at quarter end
Consecutive quarters held 2 Through Q4 2021

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.

17 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Reduced 14,033 -9,124 (-39.4%) < 0.01% $43,643 2026-08-14
Q1 2026 Reduced 23,157 -4,864 (-17.4%) < 0.01% $62,292 2026-05-15
Q4 2025 Reduced 28,021 -31,792 (-53.2%) < 0.01% $61,366 2026-02-17
Q3 2025 Unchanged 59,813 0 (0.0%) < 0.01% $139,962 2025-11-14
Q2 2025 Reduced 59,813 -417,397 (-87.5%) < 0.01% $90,916 2025-08-14
Q1 2025 Reduced 477,210 -1,839,014 (-79.4%) < 0.01% $660,936 2025-05-16
Q4 2024 Reduced 2,316,224 -1,803,170 (-43.8%) 0.03% $5,257,828 2025-02-14
Q3 2024 Added 4,119,394 +1,596,512 (63.3%) 0.09% $19,443,540 2024-11-14
Q2 2024 Reduced 2,522,882 -587,432 (-18.9%) 0.09% $18,871,157 2024-08-14
Q1 2024 Reduced 3,110,314 -216,818 (-6.5%) 0.26% $53,061,957 2024-05-15
Q4 2023 Reduced 3,327,132 -932,323 (-21.9%) 0.41% $75,525,896 2024-02-14
Q3 2023 Reduced 4,259,455 -313,431 (-6.9%) 0.37% $64,828,905 2023-11-14
Q2 2023 Added 4,572,886 +557,576 (13.9%) 0.3% $59,035,958 2023-08-14
Q1 2023 Added 4,015,310 +3,279,361 (445.6%) 0.18% $33,206,614 2023-05-15
Q4 2022 New 735,949 +735,949 (0.0%) 0.04% $6,807,528 2023-02-14
Q4 2021 Reduced 0 -214,721 (-100.0%) 0 $0 2022-02-14
Q3 2021 New 214,721 +214,721 (0.0%) < 0.01% $2,611,000 2021-11-15
Institutional context

Who else reported the position

81 managers reported CABALETTA BIO INC for Q4 2021.

Manager Activity Shares Change % of reported 13F Reported value Tenure
ADAGE CAPITAL PARTNERS GP L L C Reduced 2,541,645 -500,000 0.02% $9,633,000 9 qtrs
5AM Venture Management LLC Reduced 2,064,263 -295,000 1.47% $7,824,000 9 qtrs
CITADEL ADVISORS LLC Added 1,499,623 +940,156 < 0.01% $5,683,000 5 qtrs
SAMLYN CAPITAL LLC Added 1,383,381 +1,033,906 0.07% $5,243,000 2 qtrs
Cormorant Asset Management LP Reduced 1,154,424 -457,199 0.26% $4,375,000 9 qtrs
Ikarian Capital LLC Reduced 970,398 -217,500 0.55% $3,678,000 4 qtrs
Point72 Asset Management L P Added 950,000 +50,000 0.01% $3,601,000 2 qtrs
VANGUARD GROUP INC Added 904,492 +173,711 < 0.01% $3,428,000 9 qtrs
Redmile Group LLC Unchanged 696,377 0 0.06% $2,639,000 9 qtrs
BAKER BROS ADVISORS LP Unchanged 662,063 0 0.01% $2,509,000 9 qtrs
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Filing details and methodology As reported
Report period
December 31, 2021
Filed
February 14, 2022
Filing type
13F-HR
Position type
Common

Voting authority reported

No voting-authority amounts were reported for this position. Voting authority is not required for reported call options.

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.