13F
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First Long Island Investors, LLC

13F equity value
$1.2B
Positions
70
Top 10 concentration
39.7%
Quarters / total new picks
31 / 87
13F equity value over time
$0M$682M$1B2017201820192020202120222023202420252026

"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 31 quarters, returned +1.6% per quarter — versus +2.6% per quarter from simply owning every 13F stock. It beat that baseline in only 51.6% of quarters (excess t = 0.13, not statistically significant). Its filings tell you what it bought — not what you should buy.

Avg 2Q excess
+0.4%
t-stat
0.13
Quarterly win rate
52%
Annualized excess
-4.4%
$1 → follow vs universe
$1.40 vs $1.93
Cumulative return: $1 invested in new picks vs universe
1.00 20180331: universe 1.04120180630: universe 0.95920180930: universe 1.00320181231: universe 0.99220190331: universe 0.97520190630: universe 1.04820190930: universe 1.12720191231: universe 0.90920200331: universe 1.09620200630: universe 1.21120200930: universe 1.48520201231: universe 1.55320210331: universe 1.56620210930: universe 1.40620211231: universe 1.19720220331: universe 1.28520220630: universe 1.19020220930: universe 1.27820221231: universe 1.18720230331: universe 1.25120230630: universe 1.20620230930: universe 1.36920231231: universe 1.43020240331: universe 1.46320240630: universe 1.59520240930: universe 1.58220241231: universe 1.47620250331: universe 1.60920250630: universe 1.66020250930: universe 1.86720251231: universe 1.931 20180331: follow 0.99420180630: follow 1.03520180930: follow 1.09420181231: follow 1.06720190331: follow 1.17620190630: follow 1.18820190930: follow 1.31720191231: follow 1.21720200331: follow 1.29320200630: follow 1.42820200930: follow 1.70820201231: follow 1.81520210331: follow 1.87620210930: follow 1.50020211231: follow 1.29820220331: follow 1.24420220630: follow 1.18420220930: follow 1.17920221231: follow 1.22520230331: follow 1.47820230630: follow 1.44820230930: follow 1.21520231231: follow 1.24320240331: follow 1.33420240630: follow 1.39420240930: follow 1.35020241231: follow 1.36720250331: follow 1.14920250630: follow 1.32620250930: follow 1.45420251231: follow 1.398 0.84 1.46 2.09 20182019202020212022202320242025 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 70 · 2026 Q1

Ticker Value Weight QoQ
NVDA $60M
4.9%
HOLD
MSFT $59M
4.8%
HOLD
AMZN $57M
4.6%
TRIM
PH $54M
4.4%
HOLD
GOOGL $50M
4.1%
TRIM
APH $46M
3.7%
ADD
V $43M
3.5%
ADD
LLY $41M
3.3%
HOLD
TSM $40M
3.2%
HOLD
ABT $39M
3.2%
TRIM
AVGO $37M
3.0%
HOLD
LOW $37M
3.0%
HOLD
JPM $34M
2.8%
HOLD
MA $33M
2.6%
HOLD
AAPL $29M
2.4%
ADD
META $28M
2.3%
ADD
JNJ $27M
2.2%
HOLD
PM $26M
2.1%
HOLD
ABBV $26M
2.1%
HOLD
AMGN $25M
2.0%
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

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.