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ATYR Insider Trading

Insider Ownership Percentage: 3.70%
Insider Buying (Last 12 Months): $927,719.96
Insider Selling (Last 12 Months): $8,138.34

aTyr Pharma Insider Trading History Chart

This chart shows the insider buying and selling history at aTyr Pharma by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

aTyr Pharma Share Price & Price History

Current Price: $0.83
Price Change: ▲ Price Increase of +0.057 (7.39%)
As of 12/4/2025 05:00 PM ET

This chart shows the closing price history over time for ATYR up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

aTyr Pharma Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
10/9/2025Paul SchimmelDirectorBuy317,999$0.94$298,919.061,413,023View SEC Filing Icon  
10/8/2025Paul SchimmelDirectorBuy682,001$0.90$613,800.901,095,024View SEC Filing Icon  
3/17/2025Jane A GrossDirectorBuy3,750$4.00$15,000.009,750View SEC Filing Icon  
2/4/2025Jill Marie BroadfootCFOSell1,254$3.78$4,740.1231,763View SEC Filing Icon  
2/4/2025Nancy DenyesGeneral CounselSell899$3.78$3,398.2226,555View SEC Filing Icon  
7/24/2024Paul SchimmelDirectorBuy52,300$1.93$100,939.00413,023View SEC Filing Icon  
7/22/2024Paul SchimmelDirectorBuy41,052$1.74$71,430.48354,075View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for aTyr Pharma (NASDAQ:ATYR)

61.72% of aTyr Pharma stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at ATYR by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

aTyr Pharma Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/17/2025Woodline Partners LP102,687$74K0.0%-93.9%0.105%Search for SEC Filing on Google Icon
11/17/2025Tikvah Management LLC460,833$0.33M0.1%-81.3%0.470%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC1,890,921$1.36M0.0%+22.0%1.930%Search for SEC Filing on Google Icon
11/17/2025Brevan Howard Capital Management LP234,613$0.17M0.0%N/A0.239%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE177,671$0.13M0.0%+319.6%0.181%Search for SEC Filing on Google Icon
11/17/2025Ally Bridge Group NY LLC600,000$0.43M0.3%+108.5%0.612%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP211,000$0.15M0.0%+573.5%0.215%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC124,924$90K0.0%N/A0.127%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG4,505,955$3.25M0.0%+158.1%4.599%Search for SEC Filing on Google Icon
11/12/2025Victory Capital Management Inc.192,813$0.14M0.0%+1,778.9%0.197%Search for SEC Filing on Google Icon
11/12/2025Rafferty Asset Management LLC170,610$0.12M0.0%N/A0.174%Search for SEC Filing on Google Icon
11/7/2025GSA Capital Partners LLP706,731$0.51M0.0%+42.4%0.721%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.5,630,935$4.06M0.0%+21.0%5.747%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.105,817$76K0.0%+157.4%0.108%Search for SEC Filing on Google Icon
11/6/2025Profund Advisors LLC36,785$27K0.0%N/A0.038%Search for SEC Filing on Google Icon
11/3/2025Federated Hermes Inc.10,544,437$7.61M0.0%-28.1%10.761%Search for SEC Filing on Google Icon
10/10/2025Flputnam Investment Management Co.235,255$0.17M0.0%+466.1%0.240%Search for SEC Filing on Google Icon
8/15/2025Tower Research Capital LLC TRC 10,341$52K0.0%-62.5%0.011%Search for SEC Filing on Google Icon
8/15/2025Oxford Asset Management LLP13,734$70K0.0%N/A0.014%Search for SEC Filing on Google Icon
8/15/2025Octagon Capital Advisors LP3,820,000$19.37M4.3%+7.5%3.898%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets19,550$99K0.0%N/A0.020%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE42,346$0.22M0.0%-85.3%0.043%Search for SEC Filing on Google Icon
8/14/2025California State Teachers Retirement System5,428$28K0.0%N/A0.006%Search for SEC Filing on Google Icon
8/14/2025Raymond James Financial Inc.24,839$0.13M0.0%+79.3%0.025%Search for SEC Filing on Google Icon
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.47,643$0.24M0.0%N/A0.049%Search for SEC Filing on Google Icon
8/14/2025Main Street Financial Solutions LLC143,600$0.73M0.1%+7.0%0.147%Search for SEC Filing on Google Icon
8/14/2025The Manufacturers Life Insurance Company 32,477$0.17M0.0%N/A0.033%Search for SEC Filing on Google Icon
8/13/2025Diametric Capital LP37,012$0.19M0.1%N/A0.038%Search for SEC Filing on Google Icon
8/13/2025Marshall Wace LLP511,412$2.59M0.0%-39.0%0.522%Search for SEC Filing on Google Icon
8/13/2025Kennedy Capital Management LLC21,514$0.11M0.0%N/A0.022%Search for SEC Filing on Google Icon
8/13/2025Invesco Ltd.598,008$3.03M0.0%N/A0.610%Search for SEC Filing on Google Icon
8/13/2025OMERS ADMINISTRATION Corp31,800$0.16M0.0%-78.5%0.032%Search for SEC Filing on Google Icon
8/13/2025New York State Common Retirement Fund27,500$0.14M0.0%N/A0.028%Search for SEC Filing on Google Icon
8/13/2025Quadrature Capital Ltd56,022$0.28M0.0%N/A0.057%Search for SEC Filing on Google Icon
8/12/2025North Star Asset Management Inc.16,800$85K0.0%N/A0.017%Search for SEC Filing on Google Icon
8/12/2025Ameritas Investment Partners Inc.8,881$45K0.0%N/A0.009%Search for SEC Filing on Google Icon
8/12/2025Prudential Financial Inc.12,390$63K0.0%N/A0.013%Search for SEC Filing on Google Icon
8/12/2025Rhumbline Advisers124,158$0.63M0.0%N/A0.127%Search for SEC Filing on Google Icon
8/12/2025Legal & General Group Plc9,570$49K0.0%N/A0.010%Search for SEC Filing on Google Icon
8/12/2025MAI Capital Management369,127$1.87M0.0%-43.9%0.377%Search for SEC Filing on Google Icon
8/12/2025JPMorgan Chase & Co.41,107$0.21M0.0%N/A0.042%Search for SEC Filing on Google Icon
8/12/2025Catalyst Funds Management Pty Ltd10,700$54K0.0%-40.4%0.011%Search for SEC Filing on Google Icon
8/12/2025Ensign Peak Advisors Inc235,675$1.20M0.0%N/A0.241%Search for SEC Filing on Google Icon
8/11/2025Knott David M Jr50,367$0.26M0.1%-77.5%0.057%Search for SEC Filing on Google Icon
8/8/2025Intech Investment Management LLC44,668$0.23M0.0%N/A0.050%Search for SEC Filing on Google Icon
8/8/2025Thoroughbred Financial Services LLC210,775$1.07M0.1%N/A0.237%Search for SEC Filing on Google Icon
8/8/2025Creative Planning14,509$74K0.0%N/A0.016%Search for SEC Filing on Google Icon
8/8/2025Police & Firemen s Retirement System of New Jersey19,856$0.10M0.0%N/A0.022%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC2,098,076$10.64M0.0%+126.1%2.357%Search for SEC Filing on Google Icon
8/7/2025ProShare Advisors LLC17,837$90K0.0%N/A0.020%Search for SEC Filing on Google Icon
7/30/2025D.A. Davidson & CO.31,650$0.16M0.0%-21.3%0.036%Search for SEC Filing on Google Icon
7/25/2025Apollon Wealth Management LLC20,500$0.10M0.0%-12.8%0.023%Search for SEC Filing on Google Icon
7/11/2025Farther Finance Advisors LLC19,923$0.10M0.0%-18.4%0.022%Search for SEC Filing on Google Icon
6/27/2025Goldman Sachs Group Inc.382,317$1.16M0.0%+46.0%0.430%Search for SEC Filing on Google Icon
5/16/2025Octagon Capital Advisors LP3,552,000$10.73M1.1%+294.7%3.991%Search for SEC Filing on Google Icon
5/16/2025Goldman Sachs Group Inc.382,317$1.16M0.0%+46.0%0.430%Search for SEC Filing on Google Icon
5/16/2025Millennium Management LLC1,599,041$4.83M0.0%+334.5%1.797%Search for SEC Filing on Google Icon
5/16/2025Ally Bridge Group NY LLC777,020$2.35M2.1%+11.0%0.873%Search for SEC Filing on Google Icon
5/15/2025MAI Capital Management658,330$1.99M0.0%+306,100.0%0.740%Search for SEC Filing on Google Icon
5/15/2025OMERS ADMINISTRATION Corp148,100$0.45M0.0%+7.3%0.166%Search for SEC Filing on Google Icon
5/14/2025Erste Asset Management GmbH600,000$1.81M0.0%N/A0.674%Search for SEC Filing on Google Icon
5/14/2025Wellington Management Group LLP168,742$0.51M0.0%N/A0.190%Search for SEC Filing on Google Icon
5/13/2025American Century Companies Inc.22,703$69K0.0%-74.2%0.026%Search for SEC Filing on Google Icon
5/12/2025Knott David M Jr223,407$0.68M0.3%-27.5%0.251%Search for SEC Filing on Google Icon
5/8/2025XTX Topco Ltd19,556$59K0.0%+74.9%0.022%Search for SEC Filing on Google Icon
5/8/2025GSA Capital Partners LLP332,324$1M0.1%+21.1%0.374%Search for SEC Filing on Google Icon
5/7/2025Dauntless Investment Group LLC170,689$0.52M0.6%N/A0.192%Search for SEC Filing on Google Icon
5/6/2025Y Intercept Hong Kong Ltd12,583$38K0.0%N/A0.014%Search for SEC Filing on Google Icon
5/2/2025Apollon Wealth Management LLC23,500$71K0.0%N/A0.026%Search for SEC Filing on Google Icon
4/28/2025Cannon Global Investment Management LLC47,500$0.14M0.3%N/A0.053%Search for SEC Filing on Google Icon
4/21/2025Kingswood Wealth Advisors LLC37,000$0.11M0.0%-21.3%0.042%Search for SEC Filing on Google Icon
2/27/2025Jefferies Financial Group Inc.55,600$0.20M0.0%N/A0.066%Search for SEC Filing on Google Icon
2/18/2025Alpine Global Management LLC17,429$63K0.0%N/A0.021%Search for SEC Filing on Google Icon
2/17/2025Woodline Partners LP1,683,000$6.09M0.0%N/A2.005%Search for SEC Filing on Google Icon
2/17/2025Squarepoint Ops LLC26,614$96K0.0%N/A0.032%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Advisers LP12,250$44K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP21,628$78K0.0%N/A0.026%Search for SEC Filing on Google Icon
2/17/2025Tang Capital Management LLC671,134$2.43M0.2%N/A0.800%Search for SEC Filing on Google Icon
2/17/2025Stempoint Capital LP200,475$0.73M0.2%N/A0.239%Search for SEC Filing on Google Icon
2/17/2025Point72 Asset Management L.P.4,883,197$17.68M0.0%N/A5.817%Search for SEC Filing on Google Icon
2/17/2025Man Group plc15,248$55K0.0%N/A0.018%Search for SEC Filing on Google Icon
2/17/2025OMERS ADMINISTRATION Corp138,000$0.50M0.0%N/A0.164%Search for SEC Filing on Google Icon
2/17/2025Octagon Capital Advisors LP900,000$3.26M0.5%N/A1.072%Search for SEC Filing on Google Icon
2/17/2025Millennium Management LLC367,989$1.33M0.0%N/A0.438%Search for SEC Filing on Google Icon
2/17/2025Integral Health Asset Management LLC375,000$1.36M0.1%N/A0.447%Search for SEC Filing on Google Icon
2/17/2025J. Goldman & Co LP300,131$1.09M0.0%N/A0.358%Search for SEC Filing on Google Icon
2/17/2025Jefferies Financial Group Inc.55,600$0.20M0.0%N/A0.066%Search for SEC Filing on Google Icon
2/17/2025Group One Trading LLC7,240$26K0.0%N/A0.009%Search for SEC Filing on Google Icon
2/17/2025Balyasny Asset Management L.P.44,310$0.16M0.0%N/A0.053%Search for SEC Filing on Google Icon
2/17/2025Bank of America Corp DE91,224$0.33M0.0%N/A0.109%Search for SEC Filing on Google Icon
2/17/2025Alyeska Investment Group L.P.1,278,441$4.63M0.0%N/A1.523%Search for SEC Filing on Google Icon
2/17/2025Ally Bridge Group NY LLC699,730$2.53M2.1%N/A0.834%Search for SEC Filing on Google Icon
2/17/2025683 Capital Management LLC248,000$0.90M0.1%N/A0.295%Search for SEC Filing on Google Icon
2/14/2025Jane Street Group LLC199,006$0.72M0.0%N/A0.237%Search for SEC Filing on Google Icon
2/14/2025Schonfeld Strategic Advisors LLC63,635$0.23M0.0%N/A0.076%Search for SEC Filing on Google Icon
2/14/2025Northern Trust Corp182,625$0.66M0.0%N/A0.218%Search for SEC Filing on Google Icon
2/14/2025Oxford Asset Management LLP31,784$0.12M0.1%N/A0.038%Search for SEC Filing on Google Icon
2/14/2025Boothbay Fund Management LLC14,568$53K0.0%N/A0.017%Search for SEC Filing on Google Icon
2/14/2025Adage Capital Partners GP L.L.C.1,000,000$3.62M0.0%N/A1.191%Search for SEC Filing on Google Icon
2/14/2025Alpine Global Management LLC17,429$63K0.0%N/A0.021%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
aTyr Pharma logo
aTyr Pharma, Inc. engages in the discovery and development of medicines based on novel biological pathways. Its product pipeline includes ATYR1923, ATYR2810, NRP2 mAbs, and AARS-1, DARS-1. The company was founded by Paul Schimmel, Xiang-Lei Yang and Bruce Beutler on September 8, 2005 and is headquartered in San Diego, CA.
Read More on aTyr Pharma

Today's Range

Now: $0.83
Low: $0.75
High: $0.86

50 Day Range

MA: $0.84
Low: $0.65
High: $1.06

52 Week Range

Now: $0.83
Low: $0.64
High: $7.29

Volume

3,226,154 shs

Average Volume

3,281,441 shs

Market Capitalization

$81.12 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.57

Who are the company insiders with the largest holdings of aTyr Pharma?

aTyr Pharma's top insider shareholders include:
  1. Paul Schimmel (Director)
  2. Jill Marie Broadfoot (CFO)
  3. Nancy Denyes (General Counsel)
  4. Jane A Gross (Director)
Learn More about top insider investors at aTyr Pharma.

Who are the major institutional investors of aTyr Pharma?

aTyr Pharma's top institutional investors include:
  1. Federated Hermes Inc. — 10.76%
  2. Vanguard Group Inc. — 5.75%
  3. UBS Group AG — 4.60%
  4. Millennium Management LLC — 1.93%
  5. Rosalind Advisors Inc. — 0.00%
  6. GSA Capital Partners LLP — 0.72%
Learn More about top institutional investors of aTyr Pharma stock.

Which institutional investors are selling aTyr Pharma stock?

In the last quarter, ATYR stock was sold by these institutional investors:
  1. Federated Hermes Inc.
  2. Tikvah Management LLC
  3. Woodline Partners LP
Within the last year, company insiders that have sold aTyr Pharma company stock include:
  1. Paul Schimmel (Director)
  2. Jill Marie Broadfoot (CFO)
Learn More investors selling aTyr Pharma stock.

Which institutional investors are buying aTyr Pharma stock?

During the last quarter, ATYR stock was purchased by institutional investors including:
  1. UBS Group AG
  2. Rosalind Advisors Inc.
  3. Vanguard Group Inc.
  4. Citadel Advisors LLC
  5. Millennium Management LLC
  6. Group One Trading LLC
  7. Ally Bridge Group NY LLC
  8. Brevan Howard Capital Management LP
During the last year, these company insiders have bought aTyr Pharma stock:
  1. Paul Schimmel (Director)
  2. Jill Marie Broadfoot (CFO)
Learn More investors buying aTyr Pharma stock.