UPB
Upstream Bio, Inc. Common Stock
stockNASDAQ
Market OpenOct 5, 2026 11:39:49 AM EDT
4.70USD-6.832%(-0.35)274,762
4.6900Bid4.7100Ask0.0200SpreadInteractive Brokers
As of 2026-10-05 11:29:53 AM EDT, there were 850,000 shares available with a fee of 0.55%.
UPB Borrow Fee (CTB) · Changes
| Updated1 | Fee2 % | Available | Rebate3 % |
|---|---|---|---|
| 2026-10-05 07:34:57 AM EDT | 0.55 | 850,000 | 3.33 |
| 2026-10-02 10:44:38 AM EDT | 0.55 | 800,000 | 3.33 |
| 2026-10-02 07:19:19 AM EDT | 0.55 | 150,000 | 3.33 |
| 2026-10-02 06:16:39 AM EDT | 0.55 | 850,000 | 3.33 |
| 2026-10-02 05:13:47 AM EDT | 0.55 | 900,000 | 3.33 |
| 2026-10-02 04:58:08 AM EDT | 0.55 | 850,000 | 3.33 |
| 2026-10-02 02:52:41 AM EDT | 0.55 | 900,000 | 3.33 |
| 2026-10-01 08:39:40 PM EDT | 0.55 | 850,000 | 3.33 |
| 2026-10-01 03:09:59 PM EDT | 0.55 | 900,000 | 3.33 |
| 2026-10-01 07:35:09 AM EDT | 0.55 | 850,000 | 3.33 |
| 2026-10-01 07:19:14 AM EDT | 0.55 | 200,000 | 3.33 |
| 2026-10-01 06:47:47 AM EDT | 0.55 | 900,000 | 3.33 |
| 2026-09-30 09:10:01 AM EDT | 0.55 | 850,000 | 3.33 |
| 2026-09-30 07:35:44 AM EDT | 0.55 | 800,000 | 3.33 |
| 2026-09-30 07:04:16 AM EDT | 0.55 | 850,000 | 3.33 |
1 Data from Interactive Brokers. IBKR publishes an updated file every 15 minutes. If there’s no update, there aren’t any shares available.
2 A stock loan fee (a.k.a. borrow fee, borrow rate, or cost to borrow) is a fee charged by a brokerage firm to a client for borrowing shares.
3 A stock loan rebate is a cash payment granted by a brokerage to a customer who lends stock as cash collateral to short sellers. A positive rebate means the lender pays the interest to the broker-dealer; a negative rebate means the security is hard-to-borrow and the broker-dealer pays the interest to the lender.
UPB Borrow Fee (CTB)
UPB Borrow Fee (CTB) · Data
| Updated1 | Fee2 % | Available | Rebate3 % |
|---|
1 Data from Interactive Brokers. IBKR publishes an updated file every 15 minutes. If there’s no update, there aren’t any shares available.
2 A stock loan fee (a.k.a. borrow fee, borrow rate, or cost to borrow) is a fee charged by a brokerage firm to a client for borrowing shares.
3 A stock loan rebate is a cash payment granted by a brokerage to a customer who lends stock as cash collateral to short sellers. A positive rebate means the lender pays the interest to the broker-dealer; a negative rebate means the security is hard-to-borrow and the broker-dealer pays the interest to the lender.