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S&CO INC

Position in PEN — Penumbra Inc

CIK 1082461 BOSTON, MA

Position in PEN

as of Mar 31, 2026 · filed May 7, 2026
Position Value
$1,806,035
+$96,030 QoQ
Shares Held
5,500
0.0% QoQ
Ownership
0.014%
of shares outstanding
% of Portfolio
0.12%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2024
9 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in PEN Over Time

Shares Held

Position Value (USD)

Position in Medical Devices

Healthcare · as of Jun 30, 2026

S&CO INC holds $28,990,849 across 3 Medical Devices names.

# Ticker Company Shares Value (USD) Open

All Filings in PEN

Export CSV
9 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $1,806,035 5,500
2025-12-31 $1,710,005 5,500
2025-09-30 $1,393,260 5,500
2025-06-30 $1,411,465 5,500
2025-03-31 $1,470,755 5,500
2024-12-31 $1,306,140 5,500
2024-09-30 $1,068,705 5,500
2024-06-30 $899,850 5,000
2024-03-31 $892,720 4,000