Square Wave Capital, LLC: ATI INC (ATI): Quarterly 13F Position History
As of Q2 2026, Square Wave Capital, LLC reported 444,800 shares of ATI INC (ATI), worth $87.7M and representing 13.1% of its 13F equity book. Quarter-over-quarter share count change: + 78,400 (+21.4%) . The position first appeared in Q1 2026 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 444,800Shares Held (Latest Filing)
- $87.7MReported Market Value (Latest Filing)
- 13.1%Portfolio Weight (% of 13F Equity Book)
- +78,400Quarter-over-Quarter Share Change
- +$34.4MQuarter-over-Quarter Value Change
- 444,800Peak Reported Shares (Historical)
Recent initiation: Square Wave Capital, LLC first reported ATI 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 | 444,800 | +78,400 | +21.4% | $87.7M | 13.1% | $197.1 |
| Q1 2026 | 366,400 | – | – | $53.3M | 12.9% | $145.5 |
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 Square Wave Capital, LLC first disclose a ATI position in 13F-HR filings?
Square Wave Capital, LLC first reported ATI INC (ATI) 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 Square Wave Capital, LLC's most recent quarter-over-quarter share-count change in ATI?
Between Q1 2026 and Q2 2026, Square Wave Capital, LLC added 78,400 shares of ATI (+21.4%), bringing the total reported position to 444,800 shares at a market value of $87.7M.
Does the implied price-per-share represent Square Wave Capital, LLC's cost basis in ATI?
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.