How to Buy aTyr Pharma, Inc. Common Stock (ATYR) Stock
Compare 13 brokers offering ATYR, check which offer overnight sessions, see options pricing, and compare fractional-share terms.
- Day range
- $5.40 – $6.64
- 52-week range
- $4.07 – $44.40
- Volume
- 61.3K
- Market cap
- $15.07M
Where to buy ATYR
13 brokers in our matrix offer ATYR. Verify availability and current fees with each broker before trading.
| Broker | Commission | Fractional | Extended | Overnight | Options | OTC access |
|---|---|---|---|---|---|---|
 Charles Schwab (thinkorswim)Review | $0 | Schwab Stock Slices, S&P 500 only, ≥ $5/slice, up to 30 at once | ~1,130 | $0.65 | Most (3/5) | |
 E*TRADE (Morgan Stanley)Review | $0 listed | ~20 | $0.65 | Most (4/5) | ||
 FidelityReview | $0 | Stocks by the Slice, 7,000+ stocks/ETFs, from $1 | $0.65 | Partial (2+0) | ||
 FirstradeReview | $0 | ~4,000+ tickers, ≥ $5 | ~1,200 | $0 | Most (4/5) | |
 Interactive BrokersReview | $0 (Lite) / per-share (Pro) | ~10,000 | per-contract pricing | Full | ||
 Merrill EdgeReview | $0 | $0.65 | Most (3/5) | |||
 MoomooReview | $0 | $0 | Limited only | |||
 Public.comReview | $0 | rebate model | Limited only | |||
 RobinhoodReview | $0 | ≥ $1 stocks, market cap ≥ $25M | ~1,134 | $0 | None | |
 SoFi Active InvestingReview | $0 | $0 | Partial (1+2) | |||
 tastytradeReview | $0 stocks | $1.00 open, $0 close (capped at $10 per leg) | Limited only | |||
 TradeStationReview | $0 listed | $0.50 / $0.60 | Most (4/5) | |||
 WebullReview | $0 | $0 | Limited only |
24-Hour / Overnight trading
These brokers run an overnight session: Charles Schwab (thinkorswim), Interactive Brokers, Robinhood, E*TRADE (Morgan Stanley), Webull, Moomoo, Firstrade. Each publishes its own list of symbols admitted to that session, and those lists are typically limited to large-cap index members. We do not track them per symbol, so check whether ATYRis on your broker’s list before planning an overnight order.
Overnight sessions route through ATSs, typically have wider spreads, accept limit orders only, and offer no guaranteed fills.
About aTyr Pharma, Inc. Common Stock
- Sector
- BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
- Employees
- 58
- Headquarters
- SAN DIEGO, CA
- Listed
- 2015-05-07
- Market cap
- $15.07M
Frequently asked
Where can I buy aTyr Pharma, Inc. Common Stock (ATYR)?
ATYR is offered by 13 brokers in our matrix, including Charles Schwab (thinkorswim), E*TRADE (Morgan Stanley), Fidelity, Firstrade, Interactive Brokers. Compare commissions, fractional eligibility, and overnight availability in the broker matrix above.
Can I buy ATYR after hours or overnight?
Most brokers in the matrix support pre-market (4 AM–9:30 AM ET) and after-hours (4–8 PM ET) sessions. A true overnight session is offered by Charles Schwab (thinkorswim), Interactive Brokers, Robinhood, E*TRADE (Morgan Stanley), and others, but each admits only its own list of symbols — usually large-cap index members — so confirm ATYR is eligible with your broker. Overnight sessions route through ATSs with wider spreads and limit orders only.
Does Robinhood offer ATYR?
Yes. Robinhood offers ATYR as a regular exchange-listed security.
Does Fidelity offer ATYR?
Yes. Fidelity offers ATYR as a regular exchange-listed security.
Does Webull offer ATYR?
Yes. Webull offers ATYR as a regular exchange-listed security.
Is ATYR optionable?
Yes. ATYR has listed options contracts. Per-contract pricing varies by broker — see the Options column in the matrix.
Is there a tokenized version of ATYR?
Not in our current dataset. The tokenized stock universe (Kraken xStocks, Binance Alpha/Ondo, Robinhood EU, Hyperliquid HIP-3) is expanding quickly — we refresh quarterly.
Can I buy a fractional share of ATYR?
10 brokers in the matrix offer fractional shares, but each restricts the feature to its own symbol universe — Schwab to the S&P 500, Robinhood to stocks above a market-cap floor, Fidelity to a 7,000-name list. Check the Fractional column above for each broker's scope and minimum, then confirm ATYR qualifies.
Related reading
Background on the trading features that apply to ATYR.