During Monday's morning session, 34 companies made new 52-week highs.

Noteables:

• Sony (NYSE: SNE) was the largest firm by market cap to set a new 52-week high.
• Acme United Corporation. Common Stock (AMEX: ACU) was the smallest firm in terms of market cap to set a new 52-week high.
• Performance Shipping (NASDAQ: PSHG) was the biggest gainer, trading up 947.32% to reach its 52-week high.

Here is a list of stocks that set new 52-week highs during the first half-hour of trading on Monday:

• Sony (NYSE: SNE) shares were up 2.34% on Monday to hit a new 52-week high of $85.82 for a change of up 2.34%.
• Estee Lauder Cos (NYSE: EL) shares set a new 52-week high of $237.82 on Monday, moving up 2.86%.
• Southern Copper (NYSE: SCCO) stock hit a yearly high price of $53.55. The stock was up 1.46% for the day.
• NIO (NYSE: NIO) shares were up 9.72% for the day, having made a 52-week high of $34.94.
• Trane Technologies (NYSE: TT) shares were up 3.23% on Monday to hit a new 52-week high of $137.38 for a change of up 3.23%.
• Garmin (NASDAQ: GRMN) stock set a new 52-week high of $108.74 Monday morning. Over the session, the stock traded up 4.35%.
• Bio-Rad Laboratories (NYSE: BIO) stock on Monday broke to a yearly high of $609.45. Shares traded up 2.98%.
• Monolithic Power Systems (NASDAQ: MPWR) stock hit a yearly high price of $326.70. The stock was up 1.21% for the day.
• Sociedad Quimica Y Minera (NYSE: SQM) shares hit a new 52-week high of $38.50. The stock traded up 3.51% on the session.
• Quanta Services (NYSE: PWR) shares broke to $64.32 on Monday, setting a new 52-week high with a change of up 2.23%.
• Dunkin Brands Group (NASDAQ: DNKN) stock on Monday broke to a yearly high of $106.13. Shares traded up 6.32%.
• Amedisys (NASDAQ: AMED) shares broke to a new 52-week high of $264.77 on Monday. Shares of the company traded up 1.86%.
• IAA (NYSE: IAA) stock made a new 52-week high of $60.52 Monday. The stock was up 4.98% for the day.
• Dolby Laboratories (NYSE: DLB) shares were up 2.46% for the day, having made a 52-week high of $77.07.
• United Therapeutics (NASDAQ: UTHR) stock hit a yearly high price of $135.00. The stock was down 0.43% for the day.
• Timken (NYSE: TKR) stock hit a yearly high price of $62.26. The stock was up 3.57% for the day.
• Goosehead Insurance (NASDAQ: GSHD) shares hit a yearly high of $125.42. The stock traded up 1.15% on the session.
• Regal Beloit (NYSE: RBC) shares set a new 52-week high of $103.70 on Monday, moving up 3.42%.
• Saia (NASDAQ: SAIA) shares broke to a new 52-week high of $152.26 on Monday. Shares of the company traded up 1.18%.
• Immunovant (NASDAQ: IMVT) shares were up 2.93% for the day, having made a 52-week high of $45.30.
• R1 RCM (NASDAQ: RCM) shares set a new 52-week high of $18.67 on Monday, moving up 3.96%.
• Live Oak Bancshares (NASDAQ: LOB) shares were up 2.6% for the day, having made a 52-week high of $38.37.
• Providence Service (NASDAQ: PRSC) shares hit a new 52-week high of $121.58. The stock traded up 1.88% on the session.
• Endurance Intl Gr Hldgs (NASDAQ: EIGI) stock made a new 52-week high of $9.48 Monday. The stock was up 62.13% for the day.
• California Resources (NYSE: CRC) stock hit a yearly high price of $13.76. The stock was up 1.58% for the day.
• Cowen (NASDAQ: COWN) stock set a new 52-week high of $22.03 Monday morning. Over the session, the stock traded up 2.05%.
• Daseke (NASDAQ: DSKE) shares hit $7.36 on Monday morning, setting a new 52-week high for a change of up 6.24%.
• InterPrivate Acquisition (NYSE: IPV) shares set a new yearly high of $10.25 this morning. The stock was up 1.92% on the session.
• Performance Shipping (NASDAQ: PSHG) shares achieved a new 52-week high on Monday morning, hitting $4.73 with a daily change of up 947.32%.
• O2Micro Intl (NASDAQ: OIIM) stock hit a yearly high price of $6.95. The stock was up 2.8% for the day.
• Medley Management (NYSE: MDLY) shares broke to a new 52-week high of $5.44 on Monday. Shares of the company traded up 876.98%.
• San Juan Basin Royalty (NYSE: SJT) shares broke to $3.33 on Monday, setting a new 52-week high with a change of up 0.31%.
• Strattec Security (NASDAQ: STRT) stock set a new 52-week high of $30.40 Monday morning. Over the session, the stock traded up 4.68%.
• Acme United Corporation. Common Stock (AMEX: ACU) stock made a new 52-week high of $28.64 Monday. The stock was up 1.46% for the day.

Stay with Benzinga for further updates about these companies and many others going forward.