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Alector

138 hedge funds and large institutions have $190M invested in Alector in 2026 Q1 according to their latest regulatory filings, with 29 funds opening new positions, 44 increasing their positions, 36 reducing their positions, and 20 closing their positions.

New
Increased
Maintained
Reduced
Closed

2,945% more call options, than puts

Call options by funds: $670K | Put options by funds: $22K

45% more first-time investments, than exits

New positions opened: 29 | Existing positions closed: 20

44% more capital invested

Capital invested by funds: $132M → $190M (+$57.8M)

22% more repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 36

5% more funds holding

Funds holding: 131138 (+7)

2.72% more ownership

Funds ownership: 77.38%80.1% (+2.7%)

33% less funds holding in top 10

Funds holding in top 10: 64 (-2)

Holders
138
Holders Change
+7
Holders Change %
+5.34%
% of All Funds
1.7%
Holding in Top 10
4
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-33.33%
% of All Funds
0.05%
New
29
Increased
44
Reduced
36
Closed
20
Calls
$670K
Puts
$22K
Net Calls
+$648K
Net Calls Change
+$54K
Name Holding Trade Value Shares
Change
Change in
Stake
TCM
1
TCG Crossover Management
California
$21.5M
BlackRock
2
BlackRock
New York
$16.6M +$1.19M +593,479 +8%
Acadian Asset Management
3
Acadian Asset Management
Massachusetts
$8.68M +$1.2M +596,336 +17%
FCMI
4
Foresite Capital Management IV
California
$8.36M
VCM
5
Vanguard Capital Management
Pennsylvania
$7.91M +$7.39M +3,678,722 New
MC
6
Merck & Co
New Jersey
$7.62M
D.E. Shaw & Co
7
D.E. Shaw & Co
New York
$7.17M +$1.94M +967,684 +41%
6CM
8
683 Capital Management
New York
$6.88M -$301K -150,000 -4%
Balyasny Asset Management
9
Balyasny Asset Management
Illinois
$6.31M -$663K -330,322 -10%
NCM
10
Nantahala Capital Management
Connecticut
$6.05M +$5.66M +2,815,983 New
VPM
11
Vanguard Portfolio Management
Pennsylvania
$5.55M +$5.19M +2,583,542 New
Geode Capital Management
12
Geode Capital Management
Massachusetts
$4.92M +$424K +210,998 +10%
Jacobs Levy Equity Management
13
Jacobs Levy Equity Management
New Jersey
$4.63M -$37.8K -18,841 -0.9%
SSC
14
Spruce Street Capital
New York
$4.52M +$1.97M +983,082 +88%
IC
15
Ikarian Capital
Texas
$4.48M
KCM
16
Kynam Capital Management
New Jersey
$4.3M
Millennium Management
17
Millennium Management
New York
$4.26M +$1.3M +646,312 +48%
State Street
18
State Street
Massachusetts
$4.01M +$103K +51,228 +3%
Fidelity Investments
19
Fidelity Investments
Massachusetts
$3.86M -$874K -435,067 -19%
MC
20
Medici Capital
California
$3.55M +$305K +152,000 +10%
EP
21
Eversept Partners
New York
$2.9M +$693K +344,943 +34%
EC
22
Euclidean Capital
New York
$2.81M
Renaissance Technologies
23
Renaissance Technologies
New York
$2.77M -$514K -255,959 -17%
Two Sigma Investments
24
Two Sigma Investments
New York
$2.75M +$481K +239,650 +23%
Deutsche Bank
25
Deutsche Bank
Germany
$2.35M +$116K +57,749 +6%