ATYR

aTyr Pharma
ATYR

Overview Fund Activity

86 hedge funds and large institutions have $187M invested in aTyr Pharma in 2025 Q1 according to their latest regulatory filings, with 25 funds opening new positions, 36 increasing their positions, 14 reducing their positions, and 16 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
86
Holders Change
+9
Holders Change %
+11.69%
% of All Funds
1.17%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
25
Increased
36
Reduced
14
Closed
16
Calls
$778K
Puts
$2.32M
Net Calls
-$1.54M
Net Calls Change
-$1.5M

Top Buyers

1
OCA
Octagon Capital Advisors
New York
+$8.01M
2
UBS Group
UBS Group
Switzerland
+$4.25M
3
Millennium Management
Millennium Management
New York
+$3.72M
4
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$2.85M
5
Marshall Wace
Marshall Wace
United Kingdom
+$2.53M

Top Sellers

1
Point72 Asset Management
Point72 Asset Management
Connecticut
-$6.16M
2
LGM
Logos Global Management
California
-$3.62M
3
Adage Capital Partners
Adage Capital Partners
Massachusetts
-$3.62M
4
CC
Checkpoint Capital
California
-$1.57M
5
6CM
683 Capital Management
New York
-$898K
Name Holding Trade Value Shares
Change 		Shares
Change %
Morgan Stanley
26
Morgan Stanley
New York
$793K +$669K +221,466 +537%
Citadel Advisors
27
Citadel Advisors
Florida
$788K +$751K +248,646 +2,012%
Barclays
28
Barclays
United Kingdom
$716K +$235K +77,684 +49%
Squarepoint
29
Squarepoint
New York
$710K +$630K +208,628 +784%
Dimensional Fund Advisors
30
Dimensional Fund Advisors
Texas
$689K -$46.2K -15,275 -6%
Balyasny Asset Management
31
Balyasny Asset Management
Illinois
$686K +$552K +182,832 +413%
DMKJ
32
David M. Knott Jr
$675K -$256K -84,726 -27%
Northern Trust
33
Northern Trust
Illinois
$564K +$12.1K +3,992 +2%
HF
34
HRT Financial
New York
$550K +$550K +182,135 New
Jane Street
35
Jane Street
New York
$527K -$74K -24,499 -12%
DIG
36
Dauntless Investment Group
New Hampshire
$515K +$515K +170,689 New
Wellington Management Group
37
Wellington Management Group
Massachusetts
$510K +$510K +168,742 New
Wells Fargo
38
Wells Fargo
California
$508K +$189K +62,450 +59%
OAC
39
OMERS Administration Corp
Ontario, Canada
$447K +$30.5K +10,100 +7%
MSFS
40
Main Street Financial Solutions
Pennsylvania
$405K +$405K +134,250 New
SSA
41
Schonfeld Strategic Advisors
New York
$310K +$118K +39,071 +61%
Simplex Trading
42
Simplex Trading
Illinois
$292K +$252K +83,691 +636%
Group One Trading
43
Group One Trading
Illinois
$271K +$249K +82,431 +1,139%
JG
44
Jain Global
New York
$266K +$266K +88,143 New
QC
45
Quantessence Capital
New York
$186K +$186K +61,621 New
JFG
46
Jefferies Financial Group
New York
$168K – – –
BHCM
47
Brevan Howard Capital Management
Jersey
$161K +$161K +53,209 New
LP
48
LMR Partners
United Kingdom
$157K +$157K +52,087 New
AllianceBernstein
49
AllianceBernstein
Tennessee
$157K +$157K +51,917 New
ECM
50
ExodusPoint Capital Management
New York
$146K +$95.2K +31,441 +187%
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