JY
IMOS

Jeff Yass’s ChipMOS TECHNOLOGIES IMOS Stock Holding History

Jeff Yass’s Portfolio IMOS Stock Details IMOS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.34M Buy
+20,814
New +$1.1M ﹤0.01% 7459
2022
Q2 		– Sell
-6,391
Closed -$227K – 13375
2022
Q1 		$227K Buy
+6,391
New +$222K ﹤0.01% 10936
2016
Q4 		– Sell
-16,812
Closed -$322K – 9831
2016
Q3 		$367K Sell
16,812
-48,251
-74% -$997K ﹤0.01% 6598
2016
Q2 		$1.3M Buy
65,063
+24,185
+59% +$476K ﹤0.01% 4330
2016
Q1 		$783K Sell
40,878
-55,038
-57% -$1.06M ﹤0.01% 5573
2015
Q4 		$2.09M Buy
95,916
+29,687
+45% +$604K ﹤0.01% 3942
2015
Q3 		$1.2M Sell
66,229
-161,816
-71% -$3.2M ﹤0.01% 5319
2015
Q2 		$5.49M Buy
228,045
+136,273
+148% +$3.5M ﹤0.01% 2767
2015
Q1 		$2.49M Sell
91,772
-207,937
-69% -$5.41M ﹤0.01% 3881
2014
Q4 		$7.7M Buy
299,709
+212,490
+244% +$5.08M ﹤0.01% 2314
2014
Q3 		$2.17M Buy
87,219
+46,256
+113% +$1.21M ﹤0.01% 4461
2014
Q2 		$1.09M Buy
40,963
+2,466
+6% +$62K ﹤0.01% 5871
2014
Q1 		$936K Sell
38,497
-80,041
-68% -$1.83M ﹤0.01% 5632
2013
Q4 		$2.51M Sell
118,538
-96,357
-45% -$1.93M ﹤0.01% 3904
2013
Q3 		$4.26M Buy
214,895
+146,580
+215% +$2.77M ﹤0.01% 2961
2013
Q2 		$1.46M Buy
+68,315
New +$1.24M ﹤0.01% 4398

Other funds holding IMOS

Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
OSAM
O'Shaughnessy Asset Management Stamford, Connecticut $21.7B AUM 41.93% 1-Year Est. Return
XC
XY Capital Central, Hong Kong $104M AUM 8% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Personalized Indexing Management
Vanguard Personalized Indexing Management Oakland, California $12.2B AUM 47.93% 1-Year Est. Return
Envestnet Asset Management
Envestnet Asset Management Chicago, Illinois $424B AUM 22.96% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Jeff Yass's IMOS Position: Q2 2026 in Review

Jeff Yass opened a new position in ChipMOS TECHNOLOGIES (IMOS) in Q2 2026: 20,814 shares worth $1.34M. The stake represents ﹤0.01% of the portfolio and ranks #7459 among its holdings. This is a return to the name: Jeff Yass previously reported a position in IMOS as recently as Q1 2022.

Jeff Yass first reported a position in IMOS in Q2 2013 and has held it in 16 quarters since. The position peaked at $7.7M in Q4 2014. 91 funds tracked by Wall St. Rank hold IMOS as of Q2 2026.

  • Jeff Yass held 20,814 shares of ChipMOS TECHNOLOGIES worth $1.34M as of Q2 2026.
  • ChipMOS TECHNOLOGIES was a new Jeff Yass position in Q2 2026.
  • ChipMOS TECHNOLOGIES made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #7459 holding.
  • Jeff Yass first reported a position in ChipMOS TECHNOLOGIES in Q2 2013 and has held it in 16 quarters since.
  • Jeff Yass's ChipMOS TECHNOLOGIES position peaked at $7.7M in Q4 2014.
  • 91 funds tracked by Wall St. Rank held ChipMOS TECHNOLOGIES as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.