Optimus Prime Fund Management Co., Ltd.: AMAZON.COM (AMZN): Quarterly 13F Position History
As of Q1 2026, Optimus Prime Fund Management Co., Ltd. reported 420,000 shares of AMAZON.COM (AMZN), worth $87.5M and representing 8.4% of its 13F equity book. Quarter-over-quarter share count change: + 160,000 (+61.5%) . The position first appeared in Q4 2018 and has been disclosed across 30 13F-HR filings in Pactolio's tracked window.
- 420,000Shares Held (Latest Filing)
- $87.5MReported Market Value (Latest Filing)
- 8.4%Portfolio Weight (% of 13F Equity Book)
- +160,000Quarter-over-Quarter Share Change
- +$27.5MQuarter-over-Quarter Value Change
- 420,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 30 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 420,000 | +160,000 | +61.5% | $87.5M | 8.4% | $208.3 |
| Q4 2025 | 260,000 | +260,000 | — | $60.0M | 4.8% | $230.8 |
| Q3 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2025 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2024 | 0 | 60,000 | -100.0% | $0 | 0.0% | — |
| Q3 2024 | 60,000 | +60,000 | — | $11.2M | 1.5% | $186.3 |
| Q2 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2023 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2023 | 0 | 120,000 | -100.0% | $0 | 0.0% | — |
| Q4 2022 | 120,000 | +120,000 | — | $10.1M | 1.3% | $84.0 |
| Q3 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2022 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2021 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2021 | 0 | 14,200 | -100.0% | $0 | 0.0% | — |
| Q2 2021 | 14,200 | 14,000 | -49.6% | $48.9M | 3.3% | $3440.1 |
| Q1 2021 | 28,200 | 0 | — | $87.3M | 7.9% | $3094.1 |
| Q4 2020 | 28,200 | +9,800 | +53.3% | $91.8M | 9.9% | $3256.9 |
| Q3 2020 | 18,400 | +5,000 | +37.3% | $57.9M | 8.3% | $3148.8 |
| Q2 2020 | 13,400 | 13,400 | -50.0% | $37.0M | 6.2% | $2758.8 |
| Q1 2020 | 26,800 | +9,900 | +58.6% | $52.3M | 10.6% | $1949.7 |
| Q4 2019 | 16,900 | 0 | — | $31.2M | 9.5% | $1847.8 |
| Q3 2019 | 16,900 | 0 | — | $29.3M | 11.4% | $1735.9 |
| Q2 2019 | 16,900 | 0 | — | $32.0M | 11.9% | $1893.6 |
| Q1 2019 | 16,900 | +2,000 | +13.4% | $30.1M | 11.0% | $1780.7 |
| Q4 2018 | 14,900 | — | — | $22.4M | 8.8% | $1501.9 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Optimus Prime Fund Management Co., Ltd. first disclose a AMZN position in 13F-HR filings?
Optimus Prime Fund Management Co., Ltd. first reported AMAZON.COM (AMZN) on its 13F-HR filing for the period ending 2018-12-31 (Q4 2018). The position has appeared on 30 reported quarters within Pactolio's tracked window.
What was Optimus Prime Fund Management Co., Ltd.'s most recent quarter-over-quarter share-count change in AMZN?
Between Q4 2025 and Q1 2026, Optimus Prime Fund Management Co., Ltd. added 160,000 shares of AMZN (+61.5%), bringing the total reported position to 420,000 shares at a market value of $87.5M.
Does the implied price-per-share represent Optimus Prime Fund Management Co., Ltd.'s cost basis in AMZN?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.