$ATYR

$0.12 -$0.03 (20.34%) Live

$ATYR Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 98.1M shares outstanding

Who owns ATYR?

By type of holder

Institutions 38.8% Insiders 1.7% Everyone else 59.5%

Concentration Top 10 holders own 28.2%

FMR LLC 2.5% · Federated Hermes, Inc. 8.7%

Institutional ownership

38.8%

-18.3 pts vs last qtr

Institutional holders

-23 vs last qtr

Net shares bought

−18.0M

by institutions in Q2 2026

New / sold out

15 / 38

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Aqr Capital Management LLC +2.1M
Kalehua Capital Management LLC NEW +1.8M

Biggest sellers in Q2 2026

FMR LLC −12.2M
BlackRock, Inc. −4.6M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for aTyr Pharma Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+915.1%

+58.96% a year

Each share's claim on the business

−90.1%

shrank without buying or selling a share

Diluted shares, split-adjusted

How patient are the owners?

Institutional shares by how long they've been held

5+ years50% 3–5 years4% 1–3 years24% Under 1 year22%

Quarterly turnover

34.7%

of institutional shares changed hands

Top 10 managers, median time held

3.3 years

Super Investors

Investment managers reporting ATYR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
F FMR LLC	2.5M	2.52%	−12.2M (−83.2%)	≤2021	0.0%
Shares held by quarter Peak holding14.7M (Q1'26) Change over 8 quarters−8.9M Share of the company2.520% FMR LLC's full portfolio →
FH Federated Hermes, Inc.	8.5M	8.68%	−2.0M (−19.0%)	≤2021	0.0%
Shares held by quarter Peak holding14.7M (Q3'24) Change over 8 quarters−6.2M Share of the company8.680% Federated Hermes, Inc.'s full portfolio →

FMR LLC

2.5M

% of company

2.52%

Change vs last qtr

−12.2M (−83.2%)

Held since

≤2021

Federated Hermes, Inc.

8.5M

% of company

8.68%

Change vs last qtr

−2.0M (−19.0%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding aTyr Pharma Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ATYR on Form N-PORT; together they hold 28.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FG Fidelity Growth Company Fund Fidelity Mt. Vernon Street Trust	$2.29M	4.2M	4.30%	0.00%	May 31, 2026
FH Federated Hermes Kaufmann Fund Federated Hermes Equity Funds	$2.12M	4.4M	4.45%	0.04%	July 31, 2026

Fidelity Growth Company Fund

Fidelity Mt. Vernon Street Trust

Position value

$2.29M

% of company

4.30%

% of the fund

0.00%

As of

May 31, 2026

Federated Hermes Kaufmann Fund

Federated Hermes Equity Funds

Position value

$2.12M

% of company

4.45%

% of the fund

0.04%

As of

July 31, 2026

23 more funds behind a free account

See every fund holding aTyr Pharma Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SP Schimmel Paul Insider	1.4M	1.45%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.450% Schimmel Paul's insider activity →
SS Shukla Sanjay Insider	153.6K	0.16%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.160% Shukla Sanjay's insider activity →

Schimmel Paul

Insider

1.4M

% of company

1.45%

Change vs last qtr

—

Held since

—

Shukla Sanjay

Insider

153.6K

% of company

0.16%

Change vs last qtr

—

Held since

—

3 more holders behind a free account

See every insider and 5%+ holder of aTyr Pharma Inc.

Comments