Blue Grotto Capital, LLC: MKS INC. (MKSI): Quarterly 13F Position History
As of Q1 2026, Blue Grotto Capital, LLC reported 375,000 shares of MKS INC. (MKSI), worth $86.2M and representing 9.9% of its 13F equity book. Quarter-over-quarter share count change: 40,500 (-9.7%) . The position first appeared in Q1 2024 and has been disclosed across 9 13F-HR filings in Pactolio's tracked window.
- 375,000Shares Held (Latest Filing)
- $86.2MReported Market Value (Latest Filing)
- 9.9%Portfolio Weight (% of 13F Equity Book)
- 40,500Quarter-over-Quarter Share Change
- +$19.8MQuarter-over-Quarter Value Change
- 415,500Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 9 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 375,000 | 40,500 | -9.7% | $86.2M | 9.9% | $229.8 |
| Q4 2025 | 415,500 | +203,652 | +96.1% | $66.4M | 6.8% | $159.8 |
| Q3 2025 | 211,848 | +24,697 | +13.2% | $26.2M | 3.0% | $123.8 |
| Q2 2025 | 187,151 | 168,070 | -47.3% | $18.6M | 2.2% | $99.4 |
| Q1 2025 | 355,221 | +269,227 | +313.1% | $28.5M | 5.4% | $80.2 |
| Q4 2024 | 85,994 | 14,007 | -14.0% | $9.0M | 1.6% | $104.4 |
| Q3 2024 | 100,001 | +5,001 | +5.3% | $10.9M | 2.0% | $108.7 |
| Q2 2024 | 95,000 | 20,000 | -17.4% | $12.4M | 2.5% | $130.6 |
| Q1 2024 | 115,000 | — | — | $15.3M | 3.1% | $133.0 |
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 Blue Grotto Capital, LLC first disclose a MKSI position in 13F-HR filings?
Blue Grotto Capital, LLC first reported MKS INC. (MKSI) on its 13F-HR filing for the period ending 2024-03-31 (Q1 2024). The position has appeared on 9 reported quarters within Pactolio's tracked window.
What was Blue Grotto Capital, LLC's most recent quarter-over-quarter share-count change in MKSI?
Between Q4 2025 and Q1 2026, Blue Grotto Capital, LLC reduced its MKSI position by 40,500 shares (-9.7%), leaving 375,000 shares at a market value of $86.2M.
Does the implied price-per-share represent Blue Grotto Capital, 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.