Aspex Management (HK) Ltd: MKS INC. (MKSI): Quarterly 13F Position History
As of Q2 2026, Aspex Management (HK) Ltd reported 1,820,441 shares of MKS INC. (MKSI), worth $809.7M and representing 9.1% of its 13F equity book. Quarter-over-quarter share count change: + 281,652 (+18.3%) . The position first appeared in Q1 2026 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 1,820,441Shares Held (Latest Filing)
- $809.7MReported Market Value (Latest Filing)
- 9.1%Portfolio Weight (% of 13F Equity Book)
- +281,652Quarter-over-Quarter Share Change
- +$456.1MQuarter-over-Quarter Value Change
- 1,820,441Peak Reported Shares (Historical)
Recent initiation: Aspex Management (HK) Ltd first reported MKSI on the Q1 2026 filing, so fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q2 2026 | 1,820,441 | +281,652 | +18.3% | $809.7M | 9.1% | $444.8 |
| Q1 2026 | 1,538,789 | – | – | $353.6M | 5.1% | $229.8 |
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 rather than the manager's cost basis. See the full methodology document for the normalization rules.
When did Aspex Management (HK) Ltd first disclose a MKSI position in 13F-HR filings?
Aspex Management (HK) Ltd first reported MKS INC. (MKSI) on its 13F-HR filing for the period ending 2026-03-31 (Q1 2026). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was Aspex Management (HK) Ltd's most recent quarter-over-quarter share-count change in MKSI?
Between Q1 2026 and Q2 2026, Aspex Management (HK) Ltd added 281,652 shares of MKSI (+18.3%), bringing the total reported position to 1,820,441 shares at a market value of $809.7M.
Does the implied price-per-share represent Aspex Management (HK) Ltd's cost basis in MKSI?
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.