SEC 13F Intelligence

Harbor Advisors LLC / MA

Harbor Advisors LLC’s Mastercard Incorporated Position

Does Harbor Advisors LLC own Mastercard Incorporated (MA)? Yes — 26.0K shares worth $13M (+1.88% of its 13F portfolio) as of Q1 2026.

Position Value
$13M
Q1 2026
Shares
26.0K
% of Portfolio
+1.88%
Quarters Held
30
currently held

Position History MA

Reported value by quarter
Q4 ’18: $5MQ4 ’18Q1 ’19: $6MQ2 ’19: $7MQ3 ’19: $7MQ4 ’19: $7MQ4 ’19Q1 ’20: $6MQ2 ’20: $8MQ3 ’20: $9MQ4 ’20: $9MQ4 ’20Q1 ’21: $9MQ2 ’21: $9MQ3 ’21: $9MQ4 ’21: $9MQ4 ’21Q1 ’22: $9MQ2 ’22: $8MQ3 ’22: $7MQ4 ’22: $9MQ4 ’22Q1 ’23: $9MQ2 ’23: $10MQ3 ’23: $10MQ4 ’23: $11MQ4 ’23Q1 ’24: $13MQ2 ’24: $11MQ3 ’24: $13MQ4 ’24: $14MQ4 ’24Q1 ’25: $14MQ2 ’25: $15MQ3 ’25: $15MQ4 ’25: $15MQ4 ’25Q1 ’26: $13Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 202626.0K$13M+1.88%
Q4 202526.0K$15M+2.23%
Q3 202526.0K$15M+2.28%
Q2 202526.0K$15M+2.39%
Q1 202526.0K$14M+2.47%
Q4 202426.0K$14M+2.15%
Q3 202426.0K$13M+2.15%
Q2 202426.0K$11M+2.10%
Q1 202426.0K$13M+2.30%
Q4 202326.0K$11M+2.12%
Q3 202326.0K$10M+2.21%
Q2 202326.0K$10M+2.17%
Q1 202326.0K$9M+2.21%
Q4 202226.0K$9M+2.26%
Q3 202226.0K$7M+1.99%
Q2 202226.0K$8M+1.99%
Q1 202226.0K$9M+1.91%
Q4 202126.0K$9M+1.74%
Q3 202126.0K$9M+1.81%
Q2 202126.0K$9M+1.88%
Q1 202126.0K$9M+2.05%
Q4 202026.0K$9M+2.08%
Q3 202026.0K$9M+2.07%
Q2 202026.0K$8M+1.97%
Q1 202025.0K$6M+1.83%
Q4 201925.0K$7M+2.02%
Q3 201925.0K$7M+1.94%
Q2 201925.0K$7M+1.98%
Q1 201925.0K$6M+1.90%
Q4 201825.0K$5M+1.83%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Harbor Advisors LLC’s full portfolio or all institutional holders of MA.