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aTyr Pharma (ATYR) Institutional Ownership

aTyr Pharma logo
$0.29 -0.01 (-2.35%)
Closing price 10/2/2026 04:00 PM Eastern
Extended Trading
$0.29 +0.00 (+0.28%)
As of 10/2/2026 07:56 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for aTyr Pharma (NASDAQ:ATYR)

Current
Institutional Ownership
Percentage
61.72%
Number of
Institutional Buyers
(last 12 months)
21
Total
Institutional Inflows
(last 12 months)
$6.89M
Number of
Institutional Sellers
(last 12 months)
9
Total
Institutional Outflows
(last 12 months)
$8.22M
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ATYR Institutional Buying and Selling by Quarter

aTyr Pharma Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/19/2026Bank of America Corp DE303,559$237K0.0%+139.6%0.310%
5/14/2026Renaissance Technologies LLC40,522$32K0.0%N/A0.041%
2/23/2026Virtu Financial LLC78,953$62K0.0%N/A0.081%
2/18/2026XTX Topco Ltd79,365$62K0.0%-74.6%0.081%
2/17/2026ADAR1 Capital Management LLC50,685$40K0.0%+35.9%0.052%
2/17/2026AQR Capital Management LLC769,820$603K0.0%N/A0.786%
2/16/2026Barclays PLC174,182$136K0.0%-49.0%0.178%
2/13/2026Charles Schwab Investment Management Inc.221,767$174K0.0%-15.0%0.226%
2/13/2026State Street Corp1,724,843$1.35M0.0%-58.9%1.760%
2/12/2026Dimensional Fund Advisors LP97,497$76K0.0%-54.6%0.099%
2/12/2026Federated Hermes Inc.10,509,678$8.23M0.0%-0.3%10.726%
2/11/2026Deutsche Bank AG120,341$94K0.0%+3,779.5%0.123%
2/10/2026Goldman Sachs Group Inc.345,587$271K0.0%-49.8%0.353%
2/9/2026Geode Capital Management LLC2,283,717$1.79M0.0%+4.8%2.331%
2/6/2026GSA Capital Partners LLP2,630,638$2.06M0.2%+272.2%2.685%
1/28/2026Kingswood Wealth Advisors LLC52,000$41K0.0%N/A0.053%
1/1/2026JPMorgan Chase & Co.105,817$76K0.0%+157.4%0.108%
11/17/2025Woodline Partners LP102,687$74K0.0%-93.9%0.105%
11/17/2025Tikvah Management LLC460,833$332K0.1%-81.3%0.470%
11/17/2025Millennium Management LLC1,890,921$1.36M0.0%+22.0%1.930%
11/17/2025Brevan Howard Capital Management LP234,613$169K0.0%N/A0.239%
11/17/2025Bank of America Corp DE177,671$128K0.0%+319.6%0.181%
11/17/2025Ally Bridge Group NY LLC600,000$433K0.3%+108.5%0.612%
11/14/2025Two Sigma Investments LP211,000$152K0.0%+573.5%0.215%
11/14/2025Squarepoint Ops LLC124,924$90K0.0%N/A0.127%
11/13/2025UBS Group AG4,505,955$3.25M0.0%+158.1%4.599%
11/12/2025Victory Capital Management Inc.192,813$139K0.0%+1,778.9%0.197%
11/12/2025Rafferty Asset Management LLC170,610$123K0.0%N/A0.174%
11/7/2025GSA Capital Partners LLP706,731$510K0.0%+42.4%0.721%
11/7/2025Vanguard Group Inc.5,630,935$4.06M0.0%+21.0%5.747%
11/7/2025JPMorgan Chase & Co.105,817$76K0.0%+157.4%0.108%
11/6/2025Profund Advisors LLC36,785$27K0.0%N/A0.038%
11/3/2025Federated Hermes Inc.10,544,437$7.61M0.0%-28.1%10.761%
10/10/2025Flputnam Investment Management Co.235,255$170K0.0%+466.1%0.240%
8/15/2025Tower Research Capital LLC TRC 10,341$52K0.0%-62.5%0.011%
8/15/2025Oxford Asset Management LLP13,734$70K0.0%N/A0.014%
8/15/2025Octagon Capital Advisors LP3,820,000$19.37M4.3%+7.5%3.898%
8/15/2025BNP Paribas Financial Markets19,550$99K0.0%N/A0.020%
8/15/2025Bank of America Corp DE42,346$215K0.0%-85.3%0.043%
8/14/2025California State Teachers Retirement System5,428$28K0.0%N/A0.006%
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8/14/2025Raymond James Financial Inc.24,839$126K0.0%+79.3%0.025%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.47,643$242K0.0%N/A0.049%
8/14/2025Main Street Financial Solutions LLC143,600$728K0.1%+7.0%0.147%
8/14/2025The Manufacturers Life Insurance Company 32,477$165K0.0%N/A0.033%
8/13/2025Diametric Capital LP37,012$188K0.1%N/A0.038%
8/13/2025Marshall Wace LLP511,412$2.59M0.0%-39.0%0.522%
8/13/2025Kennedy Capital Management LLC21,514$109K0.0%N/A0.022%
8/13/2025Invesco Ltd.598,008$3.03M0.0%N/A0.610%
8/13/2025OMERS ADMINISTRATION Corp31,800$161K0.0%-78.5%0.032%
8/13/2025New York State Common Retirement Fund27,500$139K0.0%N/A0.028%
8/13/2025Quadrature Capital Ltd56,022$283K0.0%N/A0.057%
8/12/2025North Star Asset Management Inc.16,800$85K0.0%N/A0.017%
8/12/2025Ameritas Investment Partners Inc.8,881$45K0.0%N/A0.009%
8/12/2025Prudential Financial Inc.12,390$63K0.0%N/A0.013%
8/12/2025Rhumbline Advisers124,158$629K0.0%N/A0.127%
8/12/2025Legal & General Group Plc9,570$49K0.0%N/A0.010%
8/12/2025MAI Capital Management369,127$1.87M0.0%-43.9%0.377%
8/12/2025JPMorgan Chase & Co.41,107$208K0.0%N/A0.042%
8/12/2025Catalyst Funds Management Pty Ltd10,700$54K0.0%-40.4%0.011%
8/12/2025Ensign Peak Advisors Inc235,675$1.20M0.0%N/A0.241%
8/11/2025Knott David M Jr50,367$255K0.1%-77.5%0.057%
8/8/2025Intech Investment Management LLC44,668$226K0.0%N/A0.050%
8/8/2025Thoroughbred Financial Services LLC210,775$1.07M0.1%N/A0.237%
8/8/2025Creative Planning14,509$74K0.0%N/A0.016%
8/8/2025Police & Firemen s Retirement System of New Jersey19,856$101K0.0%N/A0.022%
8/8/2025Geode Capital Management LLC2,098,076$10.64M0.0%+126.1%2.357%
8/7/2025ProShare Advisors LLC17,837$90K0.0%N/A0.020%
7/30/2025D.A. Davidson & CO.31,650$160K0.0%-21.3%0.036%
7/25/2025Apollon Wealth Management LLC20,500$104K0.0%-12.8%0.023%
7/11/2025Farther Finance Advisors LLC19,923$101K0.0%-18.4%0.022%
6/27/2025Goldman Sachs Group Inc.382,317$1.16M0.0%+46.0%0.430%
5/16/2025Octagon Capital Advisors LP3,552,000$10.73M1.1%+294.7%3.991%
5/16/2025Goldman Sachs Group Inc.382,317$1.16M0.0%+46.0%0.430%
5/16/2025Millennium Management LLC1,599,041$4.83M0.0%+334.5%1.797%
5/16/2025Ally Bridge Group NY LLC777,020$2.35M2.1%+11.0%0.873%
5/15/2025MAI Capital Management658,330$1.99M0.0%+306,100.0%0.740%
5/15/2025OMERS ADMINISTRATION Corp148,100$447K0.0%+7.3%0.166%
5/14/2025Erste Asset Management GmbH600,000$1.81M0.0%N/A0.674%
5/14/2025Wellington Management Group LLP168,742$510K0.0%N/A0.190%
5/13/2025American Century Companies Inc.22,703$69K0.0%-74.2%0.026%
5/12/2025Knott David M Jr223,407$675K0.3%-27.5%0.251%
5/8/2025XTX Topco Ltd19,556$59K0.0%+74.9%0.022%
5/8/2025GSA Capital Partners LLP332,324$1.00M0.1%+21.1%0.374%
5/7/2025Dauntless Investment Group LLC170,689$515K0.6%N/A0.192%
5/6/2025Y Intercept Hong Kong Ltd12,583$38K0.0%N/A0.014%
5/2/2025Apollon Wealth Management LLC23,500$71K0.0%N/A0.026%
4/28/2025Cannon Global Investment Management LLC47,500$143K0.3%N/A0.053%
4/21/2025Kingswood Wealth Advisors LLC37,000$110K0.0%-21.3%0.042%
2/27/2025Jefferies Financial Group Inc.55,600$201K0.0%N/A0.066%
2/18/2025Alpine Global Management LLC17,429$63K0.0%N/A0.021%
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2/17/2025Woodline Partners LP1,683,000$6.09M0.0%N/A2.005%
2/17/2025Squarepoint Ops LLC26,614$96K0.0%N/A0.032%
2/17/2025Two Sigma Advisers LP12,250$44K0.0%N/A0.015%
2/17/2025Two Sigma Investments LP21,628$78K0.0%N/A0.026%
2/17/2025Tang Capital Management LLC671,134$2.43M0.2%N/A0.800%
2/17/2025Stempoint Capital LP200,475$726K0.2%N/A0.239%
2/17/2025Point72 Asset Management L.P.4,883,197$17.68M0.0%N/A5.817%
2/17/2025Man Group plc15,248$55K0.0%N/A0.018%
2/17/2025OMERS ADMINISTRATION Corp138,000$500K0.0%N/A0.164%
2/17/2025Octagon Capital Advisors LP900,000$3.26M0.5%N/A1.072%


ATYR Institutional Ownership - Frequently Asked Questions

During the previous two years, 90 institutional investors and hedge funds held shares of aTyr Pharma. The most heavily invested institutionals were Octagon Capital Advisors LP ($19.37M), Point72 Asset Management L.P. ($17.68M), Federated Hermes Inc. ($8.23M), Alyeska Investment Group L.P. ($4.63M), Vanguard Group Inc. ($4.06M), Adage Capital Partners GP L.L.C. ($3.62M), and UBS Group AG ($3.25M).Learn more on aTyr Pharma's institutional investors.

61.72% of aTyr Pharma's stock is owned by institutional investors. Learn more on ATYR's institutional investor holdings.

Of the 87 institutional investors that purchased aTyr Pharma's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Federated Hermes Inc. ($14.67M), Point72 Asset Management L.P. ($4.88M), Octagon Capital Advisors LP ($3.82M), UBS Group AG ($2.76M), Tikvah Management LLC ($2.46M), GSA Capital Partners LLP ($2.19M), and Geode Capital Management LLC ($2.17M).

Institutional investors have bought a total of 9,265,364 shares in the last 24 months. This purchase volume represents approximately $6.89M in transactions.

Of the 9 institutional investors that sold aTyr Pharma's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Federated Hermes Inc. ($4.16M), State Street Corp ($2.47M), Tikvah Management LLC ($2M), Woodline Partners LP ($1.58M), Goldman Sachs Group Inc. ($342.58K), XTX Topco Ltd ($233.05K), and Barclays PLC ($167.18K).

Institutional investors have sold a total of 11,106,278 shares in the last 24 months. This volume of shares sold represents approximately $8.22M in transactions.


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Institutional ownership data for NASDAQ:ATYR is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 5/19/2026. New 13F filings are added each quarter as they're published.
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