Madison Avenue Partners, LP — SANDISK CORP/DE SNDK: Quarterly 13F Position History
Madison Avenue Partners, LP has reported SANDISK CORP/DE (SNDK) on 4 13F-HR filings in Pactolio's tracked window, first appearing in Q2 2025. As of Q1 2026, the position is sized at 619,010 shares ($393.3M market value, 17.10% of the equity book). Quarter-over-quarter share count change: 815,162 (-56.8%) .
- 619,010Shares Held (Latest Filing)
- $393.3MReported Market Value (Latest Filing)
- 17.10%Portfolio Weight (% of 13F Equity Book)
- 815,162Quarter-over-Quarter Share Change
- +$52.8MQuarter-over-Quarter Value Change
- 3,571,109Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 4 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 619,010 | 815,162 | -56.8% | $393.3M | 17.10% | $635.34 |
| Q4 2025 | 1,434,172 | 628,349 | -30.5% | $340.4M | 14.63% | $237.38 |
| Q3 2025 | 2,062,521 | 1,508,588 | -42.2% | $231.4M | 13.81% | $112.20 |
| Q2 2025 | 3,571,109 | — | — | $161.9M | 10.81% | $45.35 |
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 Madison Avenue Partners, LP first disclose a SNDK position in 13F-HR filings?
Madison Avenue Partners, LP first reported SANDISK CORP/DE (SNDK) on its 13F-HR filing for the period ending 2025-06-30 (Q2 2025). The position has appeared on 4 reported quarters within Pactolio's tracked window.
What was Madison Avenue Partners, LP's most recent quarter-over-quarter share-count change in SNDK?
Between Q4 2025 and Q1 2026, Madison Avenue Partners, LP reduced its SNDK position by 815,162 shares (-56.8%), leaving 619,010 shares at a market value of $393.3M.
Does the implied price-per-share represent Madison Avenue Partners, LP's cost basis in SNDK?
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.