AMPL in the 13F filings
Amplitude · CUSIP 03213A104
- Quarter end
- 30 Jun 2025
- the date the book describes
- Filed
- 14 Aug 2025
- latest of these filings; the earliest 6 Aug 2025
- Managers listing it
- 2
- at least, of 95 tracked, among listed positions
- Comparable managers
- 95
- filed both Q1 2025 and Q2 2025; 2 listed it in both
- Shares listed
- 2,256,000
- combined, among listed positions
- Reported value
- $28m
- combined, at the quarter end
Among the 95 comparable managers: 1 buyer (opened or added shares) and 1 seller (trimmed or exited), at least, among listed positions. Their net change in shares was +138,963.
Managers listing AMPL in Q2 2025
2 of 2 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Baillie Gifford & Co | 1,978,568 | $25m | under 0.1% | Trimmed | -12,829 | 6 Aug 2025 (the filing on sec.gov) |
| PDT Partners LLC | 277,432 | $3.4m | 0.19% | Added | +151,792 | 14 Aug 2025 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- PDT Partners LLCexisting position · 277,432 shares now+151,792
Reductions
- Baillie Gifford & Coexisting position · 1,978,568 shares now-12,829
New positions and exits
New (0)
No new position among listed positions.
Exited (0)
No exit shown by a manager’s own filing.
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q3 2021 | 2 | $138m | n.a. | n.a. |
| Q4 2021 | 1 | $99m | n.a. | n.a. |
| Q1 2022 | 1 | $1.2m | n.a. | n.a. |
| Q2 2022 | 1 | $8.6m | n.a. | n.a. |
| Q4 2022 | 1 | $883k | n.a. | n.a. |
| Q1 2023 | 1 | $917k | n.a. | n.a. |
| Q2 2023 | 2 | $8.6m | n.a. | n.a. |
| Q3 2023 | 2 | $10m | n.a. | n.a. |
| Q4 2023 | 1 | $772k | 0 | 2 |
| Q1 2024 | 1 | $740k | 1 | 0 |
| Q2 2024 | 2 | $1.6m | 2 | 0 |
| Q3 2024 | 1 | $890k | 1 | 0 |
| Q4 2024 | 1 | $1.0m | 0 | 0 |
| Q1 2025 | 2 | $22m | 2 | 0 |
| Q2 2025 | 2 | $28m | 1 | 1 |
| Q3 2025 | 2 | $30m | 1 | 1 |
| Q4 2025 | 3 | $51m | 19 | 12 |
| Q1 2026 | 3 | $20m | 9 | 19 |
| Q2 2026 | 1 | $14m | 9 | 18 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
AMPL and GOOGL →AMPL and AMZN →AMPL and MSFT →Choose a stock to compare with AMPL →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own AMPL, latest filings →Back to the 13F Explorer →