SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC
Position in IRM — Iron Mountain Inc
CIK 1638555
Boston, MA
Position in IRM
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$29,754,467
+$29,754,467 QoQ
Shares Held
235,567
Ownership
0.079%
of shares outstanding
% of Portfolio
0.77%
of 13F equity value
Holder Rank
#104
of 1,152 holders
Holding Since
Mar 2024
4 quarters on record
Voting authority
Sole 67%
Shared 0%
None 33%
Common Shares in IRM Over Time
Shares Held
Position Value (USD)
Derivatives in IRM
reported options exposure · as of Mar 31, 2026CallValue
$8,171,200
CallShares
80,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in REIT - Specialty
Real Estate · as of Jun 30, 2026SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC holds $56,992,117 across 2 REIT - Specialty names. IRM ranks #1 (52.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | IRM |
Iron Mountain Inc
This page
|
235,567 | $29,754,467 | |
| 2 | EQIX |
Equinix Inc
|
26,130 | $27,237,650 |
All Filings in IRM
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $29,754,467 | 235,567 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $8,171,200 | 80,000 | Call | Sole | 2026-05-15 | |
| 2025-09-30 | $8,664,900 | 85,000 | Shares | Sole | 2025-11-14 | |
| 2025-09-30 | $10,194,000 | 100,000 | Call | Sole | 2025-11-14 | |
| 2024-03-31 | $8,021,000 | 100,000 | Call | Sole | 2024-05-15 | |
| 2024-03-31 | $2,807,350 | 35,000 | Shares | Sole | 2024-05-15 | |
| No filing history on record for this holder in this stock. | ||||||