Penbrook Management’s PubMatic PUBM Stock Holding History

Penbrook Management’s Portfolio PUBM Stock Details PUBM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-35,445	Closed	-$324K	–	116
2025 Q2	$324K	Hold	35,445	–	–	0.12%	95
2025 Q1	$324K	Buy	35,445 +400	+1%	+$5.27K	0.24%	76
2024 Q4	$515K	Hold	35,045	–	–	0.35%	61
2024 Q3	$521K	Sell	35,045 -7,750	-18%	-$135K	0.34%	58
2024 Q2	$869K	Sell	42,795 -3,715	-8%	-$82.8K	0.53%	40
2024 Q1	$1.1M	Sell	46,510 -300	-0.6%	-$5.38K	0.68%	33
2023 Q4	$763K	Sell	46,810 -200	-0.4%	-$2.9K	0.51%	42
2023 Q3	$569K	Hold	47,010	–	–	0.42%	52
2023 Q2	$859K	Hold	47,010	–	–	0.62%	41
2023 Q1	$650K	Sell	47,010 -1,500	-3%	-$21.7K	0.5%	52
2022 Q4	$621K	Sell	48,510 -6,875	-12%	-$108K	0.53%	50
2022 Q3	$921K	Sell	55,385 -300	-0.5%	-$5.42K	0.79%	35
2022 Q2	$885K	Sell	55,685 -300	-0.5%	-$6.42K	0.7%	40
2022 Q1	$1.46M	Buy	55,985 +31,460	+128%	+$806K	0.95%	29
2021 Q4	$835K	Buy	+24,525	New	+$799K	0.5%	57

Other funds holding PUBM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

GHC

Graham Holdings Company Arlington, Virginia $967M AUM 15.12% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Jacobs Levy Equity Management Florham Park, New Jersey $23.8B AUM 25.4% 1-Year Est. Return

Penbrook Management's PUBM Position: Q3 2025 in Review

Penbrook Management sold out of PubMatic (PUBM) in Q3 2025, closing a stake of 35,445 shares — an estimated $324K sold.

Penbrook Management first reported a position in PUBM in Q4 2021 and held it in 15 quarters. The position peaked at $1.46M in Q1 2022. 150 funds tracked by Wall St. Rank hold PUBM as of Q3 2025.

Penbrook Management reported no remaining PubMatic position as of Q3 2025 after selling out during the quarter.
Penbrook Management sold 35,445 PubMatic shares in Q3 2025, an estimated $324K.
Penbrook Management first reported a position in PubMatic in Q4 2021 and held it in 15 quarters.
Penbrook Management's PubMatic position peaked at $1.46M in Q1 2022.
150 funds tracked by Wall St. Rank held PubMatic as of Q3 2025.

Based on Penbrook Management's 13F filing for Q3 2025, filed 22 Oct 2025.