13F Insight
DOSSIER · 13F Holders · Q1 2026Inflation hedgeYield
ALEC

ALECTOR INC

142 institutions still hold ALECTOR INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 014442107·142 13F holders·last filed Mar 31, 2026
Market cap
—
— 0.0%
vs prior quarter
13F value held
$128M
46.0% inst. owned
of float
Holders
142
-20 QoQ
filers reporting
Activity
+8 / −64
+864 added · −812 reduced
this quarter
Concentration
16.80%
TCG Crossover Management, LLC #1
top holder share
AI Holders Summary · Q1 2026

142 institutions reported ALEC in Q1 2026. TCG Crossover Management, LLC leads at 16.8% of the visible book. -20 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
TCG Crossover Management, LLC
CIK 0001839948
$22M10.0M0.62%Q1 202602
BlackRock, Inc.
CIK 0002012383
$17M7.7M0.00%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$8M3.7M0.00%Q1 202604
Merck & Co., Inc.
CIK 0000310158
$8M3.5M2.18%Q1 202605
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$6M2.9M0.01%Q1 202606
Foresite Capital Management IV, LLC
CIK 0001704132
$6M3.9M2.64%Q4 202507
Nantahala Capital Management, LLC
CIK 0001472322
$6M2.8M0.22%Q1 202608
Vanguard Portfolio Management
CIK 0002100121
$6M2.6M0.00%Q1 202609
683 Capital Management, LLC
CIK 0001404574
$5M3.4M0.23%Q4 202510
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$5M2.3M0.00%Q1 202611
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 0000884414
$5M2.2M0.02%Q1 202612
Spruce Street Capital LP
CIK 0002050194
$5M2.1M1.09%Q1 202613
Ikarian Capital, LLC
CIK 0001778253
$4M2.1M0.36%Q1 202614
Kynam Capital Management, LP
CIK 0001907884
$4M2.0M0.27%Q1 202615
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$4M2.0M0.00%Q1 202616
STATE STREET CORP
CIK 0000093751
$4M1.9M0.00%Q1 202617
FMR LLC
CIK 0000315066
$4M1.8M0.00%Q1 202618
D. E. Shaw & Co., Inc.
CIK 0001009207
$4M2.4M0.00%Q4 202519
MEDICI CAPITAL LLC
CIK 0001777234
$4M1.7M4.37%Q1 202620
Eversept Partners, LP
CIK 0001697013
$3M1.4M0.15%Q1 2026
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