Companies / Acumen Pharmaceuticals, Inc. / Activity

Activity — Acumen Pharmaceuticals, Inc.

32 moves.

Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
InsidersInstitutions
DateActorActionSecurityValueShares ΔPosition afterImpact
Q1 2026
as of
RA Capital Management, L.P.
13F manager
AddCommon stock$14.30M+6.1M
+40.59%
20,992,669
29.03% of shares
medium
Q2 2026
as of
BlackRock, Inc.
13F manager
AddCommon stock$6.20M+2.3M
+1369.05%
2,490,115
3.44% of shares
medium
Q2 2026
as of
State Street Corporation
13F manager
AddCommon stock$1.34M+500K
+499.46%
600,528
0.83% of shares
low
Q1 2026
as of
Two Sigma Investments, LP
13F manager
AddCommon stock$914.7K+388K
+270.62%
530,812
0.73% of shares
low
Q1 2026
as of
Laurion Capital Management LP
13F manager
TrimCommon stock$-806.2K-342K
-39.40%
525,444
0.73% of shares
low
Q1 2026
as of
Hudson Bay Capital Management LP
13F manager
AddCommon stock$575.7K+244K
+33.65%
968,940
1.34% of shares
low
Q1 2026
as of
Marshall Wace, LLP
13F manager
AddCommon stock$405.9K+172K
+822.60%
192,889
0.27% of shares
low
Q1 2026
as of
Millennium Management LLC
13F manager
AddCommon stock$178.3K+76K
+12.93%
659,675
0.91% of shares
low
Q2 2026
as of
Deutsche Bank AG
13F manager
NewCommon stock$123.2K+46K
46,132
0.06% of shares
low
Q1 2026
as of
Renaissance Technologies LLC
13F manager
AddCommon stock$120.0K+51K
+12.02%
473,946
0.66% of shares
low
Q2 2026
as of
Quadrature Capital Ltd
13F manager
ExitCommon stock$-103.5K-49K
-100.00%
0
low
Q3 2024
as of
Barclays PLC
13F manager
AddCommon stock$100.6K+41K
+189.08%
61,997
0.09% of shares
low
Q4 2023
as of
Barclays PLC
13F manager
AddCommon stock$95.7K+25K
+111.13%
47,347
0.07% of shares
low
Q2 2024
as of
Barclays PLC
13F manager
TrimCommon stock$-62.6K-26K
-54.67%
21,446
0.03% of shares
low
Q4 2025
as of
Bank of America Corp /De
13F manager
AddCommon stock$55.8K+26K
+12.36%
240,152
0.33% of shares
low
Q4 2024
as of
Barclays PLC
13F manager
AddCommon stock$53.5K+31K
+50.14%
93,082
0.13% of shares
low
Q2 2025
as of
Barclays PLC
13F manager
TrimCommon stock$-49.0K-42K
-58.50%
29,991
0.04% of shares
low
Q1 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-34.5K-9K
-24.69%
25,952
0.04% of shares
low
Q1 2025
as of
Barclays PLC
13F manager
TrimCommon stock$-22.9K-21K
-22.36%
72,265
0.10% of shares
low
Q2 2026
as of
NINE MASTS CAPITAL Ltd
13F manager
ExitCommon stock$-22.4K-11K
-100.00%
0
low
Q4 2025
as of
Savant Capital, LLC
13F manager
ExitCommon stock$-18.9K-11K
-100.00%
0
low
Q1 2026
as of
OMERS Administration Corporation
13F manager
AddCommon stock$14.5K+6K
+27.37%
28,600
0.04% of shares
low
Q1 2026
as of
Geode Capital Management, LLC
13F manager
AddCommon stock$14.2K+6K
+1.47%
416,238
0.58% of shares
low
Q1 2026
as of
Bridgeway Capital Management, LLC
13F manager
AddCommon stock$14.2K+6K
+3.53%
176,171
0.24% of shares
low
Q2 2025
as of
Savant Capital, LLC
13F manager
NewCommon stock$12.8K+11K
11,045
0.02% of shares
low
Q3 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-12.3K-3K
-11.69%
22,425
0.03% of shares
low
Q1 2026
as of
Royal Bank of Canada
13F manager
AddCommon stock$11.5K+5K
+210.69%
7,090
<0.01% of shares
low
Q2 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-2.7K-558
-2.15%
25,394
0.04% of shares
low
Q2 2026
as of
SG Americas Securities, LLC
13F manager
ExitCommon stock$-1.7K-719K
-100.00%
0
low
Q1 2026
as of
SG Americas Securities, LLC
13F manager
AddCommon stock$751+318K
+79.34%
719,257
0.99% of shares
low
Q1 2024
as of
Barclays PLC
13F manager
TrimCommon stock$-150-37
-0.08%
47,310
0.07% of shares
low
Q1 2026
as of
BNP Paribas Financial Markets
13F manager
TrimCommon stock$-38-16
-1.31%
1,208
<0.01% of shares
low
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