Shannon River Fund Management’s PDF Solutions PDFS Stock Holding History

Shannon River Fund Management’s Portfolio PDFS Stock Details PDFS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$26.2M	Buy	+369,776	New	+$18.3M	2.34%	19
2016 Q3	–	Sell	-504,787	Closed	-$7.06M	–	39
2016 Q2	$7.06M	Sell	504,787 -295,213	-37%	-$4.01M	1.77%	22
2016 Q1	$10.7M	Sell	800,000 -237,843	-23%	-$2.61M	2.73%	14
2015 Q4	$11.3M	Hold	1,037,843	–	–	2.18%	20
2015 Q3	$10.4M	Buy	1,037,843 +75,032	+8%	+$943K	1.93%	19
2015 Q2	$15.4M	Buy	962,811 +120,400	+14%	+$2.07M	1.51%	24
2015 Q1	$15.1M	Buy	+842,411	New	+$14.7M	1.73%	26
2014 Q3	–	Sell	-1,275,000	Closed	-$27.1M	–	54
2014 Q2	$27.1M	Sell	1,275,000 -223,785	-15%	-$4.28M	1.4%	21
2014 Q1	$27.2M	Buy	1,498,785 +66,500	+5%	+$1.47M	1.73%	25
2013 Q4	$36.7M	Hold	1,432,285	–	–	2.75%	13
2013 Q3	$30.4M	Sell	1,432,285 -11,000	-0.8%	-$226K	2.1%	14
2013 Q2	$26.6M	Buy	+1,443,285	New	+$25.1M	3.18%	10

Other funds holding PDFS

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

NIM

Needham Investment Management New York $3.33B AUM 163.16% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return

Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return

RIM

Ranger Investment Management Dallas, Texas $1.58B AUM 51% 1-Year Est. Return

SCM

Snyder Capital Management San Francisco, California $5.79B AUM 33.56% 1-Year Est. Return

Jupiter Topco New York $245B AUM

Shannon River Fund Management's PDFS Position: Q2 2026 in Review

Shannon River Fund Management opened a new position in PDF Solutions (PDFS) in Q2 2026: 369,776 shares worth $26.2M. The stake represents 2.34% of the portfolio and ranks #19 among its holdings. This is a return to the name: Shannon River Fund Management previously reported a position in PDFS as recently as Q2 2016.

Shannon River Fund Management first reported a position in PDFS in Q2 2013 and has held it in 12 quarters since. The position peaked at $36.7M in Q4 2013. 283 funds tracked by Wall St. Rank hold PDFS as of Q2 2026.

Shannon River Fund Management held 369,776 shares of PDF Solutions worth $26.2M as of Q2 2026.
PDF Solutions was a new Shannon River Fund Management position in Q2 2026.
PDF Solutions made up 2.34% of Shannon River Fund Management's portfolio in Q2 2026, its #19 holding.
Shannon River Fund Management first reported a position in PDF Solutions in Q2 2013 and has held it in 12 quarters since.
Shannon River Fund Management's PDF Solutions position peaked at $36.7M in Q4 2013.
283 funds tracked by Wall St. Rank held PDF Solutions as of Q2 2026.

Based on Shannon River Fund Management's 13F filing for Q2 2026, filed 13 Aug 2026.