13F
中
← All fund report cards

HARBOR INVESTMENT ADVISORY, LLC

13F equity value
$1.3B
Positions
1,227
Top 10 concentration
38.4%
Quarters / total new picks
24 / 1,104
13F equity value over time
$0M$665M$1B20192020202120222023202420252026

"13F equity value" = market value of this filer's US-listed long equity positions only. It excludes cash, bonds, non-US and short positions, so it understates a fund's true assets under management — often by a lot.

Not significant Verdict

13F holdings are disclosed ~45 days after quarter-end, and they never reveal when within the quarter a fund actually bought. So any 13F-based summary is structurally late and blurred — this applies to every fund, including this one.

We backtested copying it anyway. Buying this fund's new positions the day each filing went public, over 24 quarters, returned +3.6% per quarter — versus +3.9% per quarter from simply owning every 13F stock. It beat that baseline in only 41.7% of quarters (excess t = 0.41, not statistically significant). Its filings tell you what it bought — not what you should buy.

Avg 2Q excess
+0.9%
t-stat
0.41
Quarterly win rate
42%
Annualized excess
-2.5%
$1 → follow vs universe
$2.01 vs $2.29
Cumulative return: $1 invested in new picks vs universe
1.00 20200331: universe 1.20620200630: universe 1.33220200930: universe 1.63320201231: universe 1.70820210331: universe 1.72320210630: universe 1.86120210930: universe 1.67020211231: universe 1.42120220331: universe 1.52620220630: universe 1.41420220930: universe 1.51920221231: universe 1.41120230331: universe 1.48620230630: universe 1.43320230930: universe 1.62620231231: universe 1.69920240331: universe 1.73820240630: universe 1.89520240930: universe 1.87920241231: universe 1.75420250331: universe 1.91220250630: universe 1.97220250930: universe 2.21720251231: universe 2.294 20200331: follow 1.19720200630: follow 1.31220200930: follow 1.50220201231: follow 1.49520210331: follow 1.65620210630: follow 1.84020210930: follow 1.52220211231: follow 1.22420220331: follow 1.32720220630: follow 1.19620220930: follow 1.30820221231: follow 1.28020230331: follow 1.43720230630: follow 1.38720230930: follow 1.57120231231: follow 1.55120240331: follow 1.57520240630: follow 1.74420240930: follow 1.61720241231: follow 1.41120250331: follow 1.73520250630: follow 1.65020250930: follow 1.99520251231: follow 2.013 0.92 1.70 2.48 202020212022202320242025 Follow Universe

Quarterly compounding, invested quarters only · entry 47 days after quarter-end (when 13F data becomes public)

Listed as facts. See the verdict above before treating this as signal.

Top 20 holdings of 1227 · 2026 Q1

Ticker Value Weight QoQ
MAR $175M
13.8%
TRIM
AAPL $82M
6.5%
TRIM
GOOGL $49M
3.9%
TRIM
AMZN $48M
3.8%
TRIM
MSFT $35M
2.8%
TRIM
BRK/B $31M
2.4%
TRIM
GOOG $18M
1.5%
TRIM
JPM $16M
1.3%
TRIM
IVV $16M
1.3%
HOLD
GLDM $16M
1.3%
TRIM
VTI $15M
1.2%
HOLD
VUG $15M
1.2%
ADD
RSP $14M
1.1%
ADD
MA $14M
1.1%
HOLD
NVDA $13M
1.1%
TRIM
VTV $13M
1.1%
ADD
VOO $13M
1.0%
HOLD
GLD $12M
1.0%
ADD
V $12M
0.9%
TRIM
IWN $11M
0.9%
HOLD

QoQ vs previous quarter's share count · NEW = new position · ADD/TRIM = ±2% shares · HOLD = unchanged.

Listed as facts. See the verdict above before treating this as signal.

New positions in 2026 Q1

AEISAGAINAKREALGNAMCRAMLPAPTVAROCASMASTHAUAVDSAVYBBHYBBINBHFBILZBIOBSMUBTIBWXTCBTCCKCDECDRECGICCIENCNOBCPB

Method & Limitations

Method: a "new position" = held this quarter, absent last quarter (options excluded; stocks with <50 prior holders excluded to filter spin-off artifacts). Entry 47 days after quarter-end — the first day the public could act on the filing. Benchmark = equal-weighted universe of all 13F-held stocks. Limitations: quarterly snapshots can't see intra-quarter trades; survivorship bias — funds that shut down are absent, which flatters the sample. Statistics, not advice.