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Main Street Research’s Pacific Biosciences PACB Stock Holding History

Main Street Research’s Portfolio PACB Stock Details PACB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$256K Hold
152,100
– – 0.01% 128
2026
Q1 		$201K Buy
+152,100
New +$272K 0.01% 145
2025
Q4 		– Sell
-142,100
Closed -$182K – 141
2025
Q3 		$182K Buy
+142,100
New +$192K 0.01% 128

Other funds holding PACB

Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
BLAM
Bourne Lent Asset Management Pawling, New York $289M AUM 30.86% 1-Year Est. Return
MCP
Mirador Capital Partners Pleasanton, California $817M AUM 42.46% 1-Year Est. Return
AF
Advisornet Financial Minnetonka, Minnesota $2.19B AUM 21.28% 1-Year Est. Return
KWM
Koa Wealth Management Encinitas, California $147M AUM 18.41% 1-Year Est. Return
BEI
Benjamin Edwards Inc Clayton, Missouri $11B AUM 18.22% 1-Year Est. Return
KCPG
Kavar Capital Partners Group Leawood, Kansas $812M AUM 29.76% 1-Year Est. Return
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
PFSRSONJ
Police & Firemen's Retirement System of New Jersey Trenton, New Jersey $13.3B AUM 45.46% 1-Year Est. Return
HIC
Hartline Investment Corp Winnetka, Illinois $1.15B AUM 65.07% 1-Year Est. Return

Main Street Research's PACB Position: Q2 2026 in Review

Main Street Research held its Pacific Biosciences (PACB) position steady in Q2 2026 at 152,100 shares worth $256K. The position accounts for 0.01% of the portfolio, ranked #128.

Main Street Research first reported a position in PACB in Q3 2025 and has held it in 3 quarters since. 46 funds tracked by Wall St. Rank hold PACB as of Q2 2026.

  • Main Street Research held 152,100 shares of Pacific Biosciences worth $256K as of Q2 2026.
  • Main Street Research left its Pacific Biosciences share count unchanged in Q2 2026.
  • Pacific Biosciences made up 0.01% of Main Street Research's portfolio in Q2 2026, its #128 holding.
  • Main Street Research first reported a position in Pacific Biosciences in Q3 2025 and has held it in 3 quarters since.
  • 46 funds tracked by Wall St. Rank held Pacific Biosciences as of Q2 2026.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.