LIGHT STREET CAPITAL MANAGEMENT, LLC: MKS INC. (MKSI): Quarterly 13F Position History
As of Q1 2026, LIGHT STREET CAPITAL MANAGEMENT, LLC reported 122,264 shares of MKS INC. (MKSI), worth $28.1M and representing 5.6% of its 13F equity book. Quarter-over-quarter share count change: + 102,682 (+524.4%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 122,264Shares Held (Latest Filing)
- $28.1MReported Market Value (Latest Filing)
- 5.6%Portfolio Weight (% of 13F Equity Book)
- +102,682Quarter-over-Quarter Share Change
- +$25.0MQuarter-over-Quarter Value Change
- 122,264Peak Reported Shares (Historical)
Recent initiation: LIGHT STREET CAPITAL MANAGEMENT, LLC first reported MKSI on the Q4 2025 filing — 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 |
|---|---|---|---|---|---|---|
| Q1 2026 | 122,264 | +102,682 | +524.4% | $28.1M | 5.6% | $229.8 |
| Q4 2025 | 19,582 | — | — | $3.1M | 0.5% | $159.8 |
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, not the manager's cost basis. See the full methodology document for the normalization rules.
When did LIGHT STREET CAPITAL MANAGEMENT, LLC first disclose a MKSI position in 13F-HR filings?
LIGHT STREET CAPITAL MANAGEMENT, LLC first reported MKS INC. (MKSI) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was LIGHT STREET CAPITAL MANAGEMENT, LLC's most recent quarter-over-quarter share-count change in MKSI?
Between Q4 2025 and Q1 2026, LIGHT STREET CAPITAL MANAGEMENT, LLC added 102,682 shares of MKSI (+524.4%), bringing the total reported position to 122,264 shares at a market value of $28.1M.
Does the implied price-per-share represent LIGHT STREET CAPITAL MANAGEMENT, LLC'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.