Westchester Capital Management, LLC
Position in ATII — Archimedes Tech SPAC Partners II Co.
CIK 1512805
VALHALLA, NY
Position in ATII
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$9,443,367
+$45,356 QoQ
Shares Held
1,107,143
0.0% QoQ
Ownership
3.74%
of shares outstanding
% of Portfolio
0.63%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2025
5 quarters on record
Voting authority
Sole 7%
Shared 93%
None 0%
Common Shares in ATII Over Time
Shares Held
Position Value (USD)
Position in Shell Companies
Financial Services · as of Jun 30, 2026Westchester Capital Management, LLC holds $674,084,820 across 166 Shell Companies names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | 2,177,638 | $23,351,250 | |||
| 2 | KFII |
K&F Growth Acquisition Corp. II
|
1,726,268 | $15,574,626 | |
| 3 | GTERA |
Globa Terra Acquisition Corp
|
1,414,429 | $14,582,762 | |
| 4 | GIW |
GigCapital8 Corp.
|
1,330,000 | $13,391,768 | |
| 5 | KCHV |
Kochav Defense Acquisition Corp.
|
2,286,000 | $13,335,818 | |
| 6 | OYSE |
Oyster Enterprises II Acquisition Corp
|
2,145,112 | $13,326,700 | |
| 7 | SOUL |
Soulpower Acquisition Corp.
|
1,279,300 | $13,240,753 | |
| 8 | SDHI |
Siddhi Acquisition Corp (Cayman Islands)
|
1,249,197 | $13,016,631 |
All Filings in ATII
Export CSV
9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 ATIIW | — | 199,999 | Shares | Other | 2026-05-15 | |
| 2026-03-31 | $9,443,367 | 907,144 | Shares | Other | 2026-05-15 | |
| 2025-12-31 ATIIW | — | 199,999 | Shares | Other | 2026-02-13 | |
| 2025-12-31 | $9,398,011 | 907,144 | Shares | Other | 2026-02-13 | |
| 2025-09-30 ATIIW | — | 199,999 | Shares | Other | 2025-11-14 | |
| 2025-09-30 | $9,188,998 | 900,000 | Shares | Other | 2025-11-14 | |
| 2025-06-30 ATIIW | — | 199,999 | Shares | Other | 2025-08-14 | |
| 2025-06-30 | $6,649,499 | 650,000 | Shares | Other | 2025-08-14 | |
| 2025-03-31 ATIIU | $4,027,999 | 400,000 | Shares | Other | 2025-05-14 | |
| No filing history on record for this holder in this stock. | ||||||