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 		$1.7M Sell
26,500
-19,500
-42% -$1.03M ﹤0.01% 6849
2026
Q1 		$1.65M Buy
46,000
+10,600
+30% +$400K ﹤0.01% 6624
2025
Q4 		$1.05M Buy
+35,400
New +$882K ﹤0.01% 7072
2025
Q1 		– Sell
-14,800
Closed -$279K – 12931
2024
Q4 		$279K Sell
14,800
-9,000
-38% -$187K ﹤0.01% 9995
2024
Q3 		$557K Buy
+23,800
New +$568K ﹤0.01% 8202
2017
Q1 		– Sell
-10,528
Closed -$175K – 9412
2016
Q4 		$175K Sell
10,528
-31,309
-75% -$599K ﹤0.01% 8755
2016
Q3 		$913K Sell
41,837
-79,228
-65% -$1.64M ﹤0.01% 4974
2016
Q2 		$2.42M Buy
121,065
+65,705
+119% +$1.29M ﹤0.01% 3263
2016
Q1 		$1.06M Sell
55,360
-32,853
-37% -$631K ﹤0.01% 4974
2015
Q4 		$1.93M Buy
88,213
+17,244
+24% +$351K ﹤0.01% 4112
2015
Q3 		$1.28M Sell
70,969
-30,494
-30% -$602K ﹤0.01% 5168
2015
Q2 		$2.44M Sell
101,463
-23,414
-19% -$602K ﹤0.01% 4280
2015
Q1 		$3.39M Sell
124,877
-39,206
-24% -$1.02M ﹤0.01% 3334
2014
Q4 		$4.22M Buy
164,083
+6,807
+4% +$163K ﹤0.01% 3132
2014
Q3 		$3.92M Buy
157,276
+26,682
+20% +$701K ﹤0.01% 3406
2014
Q2 		$3.47M Buy
130,594
+64,979
+99% +$1.63M ﹤0.01% 3654
2014
Q1 		$1.59M Sell
65,615
-21,327
-25% -$488K ﹤0.01% 4701
2013
Q4 		$1.84M Sell
86,942
-18,967
-18% -$380K ﹤0.01% 4420
2013
Q3 		$2.1M Buy
105,909
+27,952
+36% +$528K ﹤0.01% 4009
2013
Q2 		$1.66M Buy
+77,957
New +$1.41M ﹤0.01% 4191

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.