Summit Partners Public Asset Management’s Iron Mountain IRM Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q2
$29.8M Buy
+235,567
New +$28.9M 0.52% 61
2025
Q4
Sell
-85,000
Closed -$8.66M 170
2025
Q3
$8.66M Buy
+85,000
New +$8.19M 0.18% 110
2024
Q2
Sell
-35,000
Closed -$2.81M 127
2024
Q1
$2.81M Buy
+35,000
New +$2.53M 0.1% 110

Other funds holding IRM

Summit Partners Public Asset Management's IRM Position: Q2 2026 in Review

Summit Partners Public Asset Management opened a new position in Iron Mountain (IRM) in Q2 2026: 235,567 shares worth $29.8M. The stake represents 0.52% of the portfolio and ranks #61 among its holdings. This is a return to the name: Summit Partners Public Asset Management previously reported a position in IRM as recently as Q3 2025.

Summit Partners Public Asset Management first reported a position in IRM in Q1 2024 and has held it in 3 quarters since. 1,168 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • Summit Partners Public Asset Management held 235,567 shares of Iron Mountain worth $29.8M as of Q2 2026.
  • Iron Mountain was a new Summit Partners Public Asset Management position in Q2 2026.
  • Iron Mountain made up 0.52% of Summit Partners Public Asset Management's portfolio in Q2 2026, its #61 holding.
  • Summit Partners Public Asset Management first reported a position in Iron Mountain in Q1 2024 and has held it in 3 quarters since.
  • 1,168 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on Summit Partners Public Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.