CenterBook Partners’s Amplitude AMPL Stock Holding History

CenterBook Partners’s Portfolio AMPL Stock Details AMPL Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$5.9M	Buy	771,163 +730,255	+1,785%	+$5.04M	0.29%	92
2026 Q1	$279K	Buy	+40,908	New	+$338K	0.02%	573
2025 Q4	–	Sell	-32,694	Closed	-$350K	–	553
2025 Q3	$350K	Sell	32,694 -275,843	-89%	-$3.27M	0.02%	525
2025 Q2	$3.83M	Sell	308,537 -299,733	-49%	-$3.24M	0.21%	129
2025 Q1	$6.2M	Sell	608,270 -130,234	-18%	-$1.54M	0.39%	71
2024 Q4	$7.79M	Sell	738,504 -51,574	-7%	-$516K	0.47%	57
2024 Q3	$7.09M	Buy	790,078 +567,806	+255%	+$4.84M	0.44%	67
2024 Q2	$1.98M	Sell	222,272 -591,704	-73%	-$5.56M	0.12%	263
2024 Q1	$8.86M	Buy	813,976 +634,576	+354%	+$7.79M	0.61%	27
2023 Q4	$2.28M	Sell	179,400 -95,148	-35%	-$1.06M	0.28%	118
2023 Q3	$3.18M	Buy	+274,548	New	+$3.18M	0.4%	72

Other funds holding AMPL

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

SUT

SC US (TTGP) Menlo Park, California $31.9B AUM 28.45% 1-Year Est. Return

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

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Trigran Investments Northbrook, Illinois $545M AUM 56.2% 1-Year Est. Return

Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

CenterBook Partners's AMPL Position: Q2 2026 in Review

CenterBook Partners increased its Amplitude (AMPL) stake by 1,785% in Q2 2026, buying an estimated $5.04M and bringing the position to 771,163 shares worth $5.9M. The position accounts for 0.29% of the portfolio, ranked #92.

CenterBook Partners first reported a position in AMPL in Q3 2023 and has held it in 11 quarters since. The position peaked at $8.86M in Q1 2024. 202 funds tracked by Wall St. Rank hold AMPL as of Q2 2026.

CenterBook Partners held 771,163 shares of Amplitude worth $5.9M as of Q2 2026.
CenterBook Partners bought 730,255 Amplitude shares in Q2 2026, an estimated $5.04M.
Amplitude made up 0.29% of CenterBook Partners's portfolio in Q2 2026, its #92 holding.
CenterBook Partners first reported a position in Amplitude in Q3 2023 and has held it in 11 quarters since.
CenterBook Partners's Amplitude position peaked at $8.86M in Q1 2024.
202 funds tracked by Wall St. Rank held Amplitude as of Q2 2026.

Based on CenterBook Partners's 13F filing for Q2 2026, filed 11 Aug 2026.