AMPL β€” AMPLITUDE INC

Ownership history in CenterBook Partners LP  Β·  9 quarters on record

This page tracks every 13F SEC filing in which CenterBook Partners LP reported a position in AMPLITUDE INC (AMPL). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price β€” sourced directly from SEC EDGAR 13F filings.

πŸ” Peak position
0.61% (2024 Q1)
πŸ“Š Avg. % of fund
0.33%
πŸ“… First filed
2023 Q3
πŸ“… Last filed
2025 Q3
⏱ Quarters held
9

Position Intelligence

CenterBook Partners LP Γ— AMPL AI Analytics

πŸ“‰ CenterBook Partners LP underperformed the S&P 500 by –27.0% annually on this AMPL position. Timing score: 57% (4/7 decisions correct). Average cost basis: $9.98. Maximum drawdown during holding period: –30.0%.

πŸ“ˆ Position Alpha vs SPY
-27.0%
annualised excess return

❌ Significantly underperformed the S&P 500 by 27.0% ann.
7 quarters analyzed

⏱️ Timing Score
57%

βœ… Decent timing β€” more right than wrong on entries and exits.
4 of 7 add/trim decisions correct

πŸ’° Entry Quality
$9.98
+7.4% vs current ($10.72)

Best entry: $8.97 (2024 Q3)  Β·  Worst: $10.88 (2024 Q1)

πŸ›‘οΈ Drawdown Resilience
–30.0%
max drawdown while held

πŸ’ͺ Held through 1 major drawdown (>20%). Strong conviction under pressure.

πŸ’ͺ Fund Conviction
33%
buy-side decisions

3 adds Β· 6 trims. Bought during 1 of 4 down-price quarters. πŸ“‰ Predominantly trimming β€” distribution phase.

πŸ“‘ Position Trajectory
↓ Shrinking
last 4–5 quarters trend

πŸ“‰ Portfolio weight has been declining in recent quarters. Possible distribution phase.
Currently 0.02% of portfolio

⚠ Based on quarterly 13F SEC filings and end-of-quarter closing prices. Timing score = accuracy of add/trim decisions vs next-quarter price direction. Alpha = mean quarterly excess return Γ— 4 (annualised). Not investment advice.

% of Fund (quarterly)    AMPL price (monthly, adj. close)
πŸ“‹ Quarterly Holdings History 9 quarters  β–Ύ
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q3 REDUCED 32,694 -275,843 -89.4% 0.02% $350K $10.72
2025 Q2 REDUCED 308,537 -299,733 -49.3% 0.21% $3.8M $12.40
2025 Q1 REDUCED 608,270 -130,234 -17.6% 0.39% $6.2M $10.19
2024 Q4 REDUCED 738,504 -51,574 -6.5% 0.47% $7.8M $10.55
2024 Q3 ADDED 790,078 +567,806 +255.5% 0.44% $7.1M $8.97
2024 Q2 REDUCED 222,272 -591,704 -72.7% 0.12% $2.0M $8.90
2024 Q1 ADDED 813,976 +634,576 +353.7% 0.61% $8.9M $10.88
2023 Q4 REDUCED 179,400 -95,148 -34.7% 0.28% $2.3M $12.72
2023 Q3 INITIATED 274,548 β€” β€” 0.40% $3.2M β€”

🏒 Other funds also holding AMPL

As of 2025 Q4 β€” sorted by position size

Toronado Partners, LLC 3Y 7Y 8.58% Meros Investment Management, LP 3Y 3.96% Gagnon Advisors, LLC 3Y 7Y 3.36% Circumference Group LLC 2.97% MONIMUS CAPITAL MANAGEMENT, LP 2.84% LIGHT STREET CAPITAL MANAGEMENT, LLC 3Y 7Y 2.67% GAGNON SECURITIES LLC 3Y 7Y 1.65% Optimus Prime Fund Management Co., Ltd. 3Y 7Y 1.47% WESTERLY CAPITAL MANAGEMENT, LLC 3Y 7Y 1.27% G2 Investment Partners Management LLC 3Y 7Y 0.78%
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