Pre-Bell Movers | RFAI Surges by 544.1%; Here Are 20 Stocks Moving Premarket (Aug 21)
Ross Stores, Inc. ROST | 0.00 | |
Strategy MSTR | 0.00 | |
Coinbase COIN | 0.00 | |
Werewolf Therapeutics, Inc. HOWL | 0.00 | |
RF Acquisition Corp II RFAI | 0.00 |

US stock futures rebounded early Friday, following Thursday's sell-off driven by rising Treasury yields despite government efforts to stem the rout, with UBS noting that Treasury buybacks do not ease supply pressure.

ROSS STORES(ROST) surged over 7% after hours on better-than-expected Q2 results, prompting analysts to revise full-year guidance.
Bitcoin's rally above US$75,000 lifted crypto-related stocks, with MICROSTRATEGY(MSTR) jumping over 8% and COINBASE GLOBAL(COIN) climbing nearly 6% premarket.

Werewolf Therapeutics, Inc.(HOWL.US) shares are rising pre-market following an announcement that the company have sold their pre-clinical technology platforms, INDUCER and INDUKINE, to EMD Serono Research & Development Institute Inc.
The transaction highlights the company's strategic move to monetize assets, obtaining US$28 million upfront and securing additional collaborations for ongoing innovation and development within their clinical-stage programs, without diluting shareholder equity.
Werewolf Therapeutics, Inc. share surges by 68.5% to US$0.73 in the pre-market trading session.
Additionally, RF Acquisition Corp II(RFAI.US) gains 544.1% amid its business combination with Nanyang Biologics approved by shareholders.
Here are some other stocks moving in pre-market trading as of 11:07:46, Aug. 21 (Friday) Riyadh Time.
Gainers
Change | Price(US$) | Ticker (🌙 means "Shariah Compliant") | Additional Information |
544.1% | 82.0 | RF Acquisition Corp II(RFAI.US) | Business combination with Nanyang Biologics approved by shareholders. |
154.6% | 0.28 | RF Acquisition Corp II Rights 15.02.27 For Shares(RFAIR.US) | - |
68.5% | 0.73 | Werewolf Therapeutics, Inc.(HOWL.US) | Due to sale of pre-clinical platforms to EMD Serono for $28M upfront. |
62.0% | 16.0 | Bleichroeder Acquisition Corp. III Class A(BCCQ.US) | - |
24.0% | 3.44 | 🌙 SU Group Holdings(SUGP.US) | Regained compliance with Nasdaq listing standards. |
23.9% | 0.56 | Fold Holdings, Inc. Class A(FLD.US) | - |
22.2% | 13.25 | A SPAC III Acquisition Corporation Class A(ASPC.US) | - |
19.9% | 8.6 | Tactical Resources Corporation(TREO.US) | - |
17.8% | 4.71 | StablecoinX Inc. Class A(USDE.US) | Due to Bitcoin surpassing $72,000 pivotal.; Stock gained considerable momentum by 29.4% on last trading day |
17.0% | 1.31 | Stablecoin Development Corporation(SDEV.US) | - |
Losers
Change | Price(US$) | Ticker (🌙 means "Shariah Compliant") | Additional Information |
-33.1% | 2.22 | 🌙 Jianzhi Education Technology Group Company Ltd.(JZ.US) | - |
-27.9% | 1.64 | 🌙 iSpecimen Inc(ISPC.US) | - |
-21.9% | 0.64 | 🌙 FLUX POWER HOLDINGS INC(FLUX.US) | Quarterly losses higher than expected. |
-17.8% | 0.47 | 🌙 Mixed Martial Arts Group Limited(MMA.US) | - |
-17.7% | 1.44 | Borealis Foods Inc.(BRLS.US) | - |
-14.6% | 0.09 | 🌙 Ohmyhome Limited Class A(OMH.US) | - |
-14.4% | 186.74 | 🌙 OSI Systems, Inc.(OSIS.US) | Weak FY27 sales guidance triggers premarket decline. |
-14.2% | 3.56 | First Breach (Direct Listing)(FBDT.US) | Stock gained considerable momentum by 65.4% on last trading day |
-13.6% | 5.09 | ZeroStack Corp.(ZSTK.US) | - |
-13.1% | 21.21 | T3 Defense Inc.(DFNS.US) | - |
Editor's note: This content was generated by Sahm's in-house AI-enabled SaaS tool and was reviewed by our editing team.
The table above reflects pre-market price changes only and does not constitute recommendations. Stocks, particularly those with smaller market caps, may see heightened volatility. Investors should conduct thorough research and consult advisors before decision-making based on this data.
