Stocks/Funds/CIK 1475483

AMERICAN SECURITIES LLC

market makerconcentrated
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1475483
Assets
$3.93B
+392.0% YoY
Holdings
2
Lifetime alpha vs market
-4.61% annual
Average hold time
0.9 yr
median 0.9 yr

Quarterly history

Cum return +29% vs S&P +49% · α -20% lifetimeAUM $3.9B · peak $3.9BFlow $2.8B (+211%)2015-122017-122019-032020-062021-092023-032025-032026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+0.00%
trims when stocks drop
when a holding falls −10%+
Middle response
-8.09%
baseline attrition
Rally response
-8.97%
trims into rallies
when a holding rises +10%+

Top positions · 2

Ticker$ value% portYoYHold time
$2.76B70.1%0.3 yr
AMTMAmentum Holdings, Inc.$1.17B29.9%+43.3%1.5 yr

Portfolio composition (YoY)

Industry mix
Unknown70.1%$2.76B
Aerospace & Defense29.9%-70.1pp$1.17B
Country
Unknown70.1%
US29.9%-70.1pp
Top 5: 100.0% · Top 10: 100.0% · Top 25: 100.0%

Winners

TickerPrev $PnLYoY %
AMTM$799M+0.35B43.3%

Losers

TickerPrev $PnLYoY %

Top buys this quarter · 1

new+$0M

Top sells this quarter · 0

No sells this quarter

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$3.93B2+43.30%+17.59%+25.71%+2.76B
2025-12-31$1.31B1+37.90%+17.72%+20.18%-0.00B
2025-09-30$1.08B1-17.16%+17.52%-34.68%+0.00B
2025-06-30$1.06B1+3.12%+21.34%-18.22%+0.03B
2025-03-31$799M1-24.50%+6.01%-30.51%+0.00B
2024-12-31$923M1-4.01%+20.34%-24.35%+0.84B
2023-12-31$109M1+151.73%+26.18%+125.55%-0.07B
2023-09-30$140M1+155.69%+21.57%+134.12%-0.03B
2023-06-30$175M1+19.45%+19.42%+0.02%-0.04B
2023-03-31$195M1+90.76%+7.46%+83.30%-0.00B
2022-12-31$102M1+28.26%+7.56%+20.70%-0.00B
2022-09-30$80M1-55.63%-4.93%-50.70%+0.00B
2022-03-31$179M1+0.03B
2021-12-31$149M1-0.05B
2021-09-30$199M1-0.04B
2021-06-30$237M1-0.00B