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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+0.54%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$1.19B
AUM Growth
+$333M
Cap. Flow
+$279M
Cap. Flow %
23.35%
Top 10 Hldgs %
20.47%
Holding
6,639
New
1,607
Increased
1,829
Reduced
1,589
Closed
1,438

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.6M
2
AAPL icon
Apple
AAPL
+$29.1M
3
META icon
Meta Platforms (Facebook)
META
+$15.7M
4
IBM icon
IBM
IBM
+$13.8M
5
BIDU icon
Baidu
BIDU
+$10.6M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$10.1M
2
MCD icon
McDonald's
MCD
+$8.46M
3
RL icon
Ralph Lauren
RL
+$5.36M
4
INTC icon
Intel
INTC
+$5.04M
5
WBA
Walgreens Boots Alliance
WBA
+$4.76M

Sector Composition

Rank Sector Weight
1 Communication Services 14.27%
2 Technology 10.3%
3 Healthcare 7.76%
4 Consumer Discretionary 6.32%
5 Financials 5.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ASC icon
4551
CALL
Ardmore Shipping
ASC
$669M
$1K ﹤0.01%
+5
New +$58
ASRT
4552
PUT
DELISTED
Assertio
ASRT
– –
0
– –
AVNS icon
4553
CALL
Avanos Medical
AVNS
$1.17B
$1K ﹤0.01%
86
-4
-4% -$180
AWK icon
4554
PUT
American Water Works
AWK
$26.3B
$1K ﹤0.01%
+4
New +$211
AYI icon
4555
PUT
Acuity Brands
AYI
$10.1B
$1K ﹤0.01%
37
-27
-42% -$4.74K
BB icon
4556
CALL
BlackBerry
BB
$4.93B
$1K ﹤0.01%
250
-37
-13% -$358
BBSI icon
4557
PUT
Barrett Business Services
BBSI
$995M
$1K ﹤0.01%
+84
New +$848
BBVA icon
4558
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$147B
$1K ﹤0.01%
89
– –
BC icon
4559
PUT
Brunswick
BC
$5.24B
$1K ﹤0.01%
+3
New +$157
BCE icon
4560
PUT
BCE
BCE
$19.8B
$1K ﹤0.01%
100
+87
+669% +$3.82K
BCS icon
4561
PUT
Barclays
BCS
$96.3B
$1K ﹤0.01%
23
+1
+5% +$15
BFH icon
4562
CALL
Bread Financial
BFH
$4.29B
$1K ﹤0.01%
35
+32
+1,067% +$7.65K
BGFV
4563
DELISTED
Big 5 Sporting Goods
BGFV
$1K ﹤0.01%
131
+102
+352% +$1.41K
BJRI icon
4564
PUT
BJ's Restaurants
BJRI
$1.45B
$1K ﹤0.01%
5
-147
-97% -$7.1K
BOH icon
4565
CALL
Bank of Hawaii
BOH
$3.17B
$1K ﹤0.01%
+1
New +$63
BOH icon
4566
PUT
Bank of Hawaii
BOH
$3.17B
$1K ﹤0.01%
+61
New +$3.85K
BSBR icon
4567
CALL
Santander
BSBR
$40.7B
$1K ﹤0.01%
+32
New +$161
BSET icon
4568
PUT
Bassett Furniture
BSET
$169M
$1K ﹤0.01%
40
– –
BTI icon
4569
CALL
British American Tobacco
BTI
$131B
$1K ﹤0.01%
16
-22
-58% -$1.21K
BYD icon
4570
CALL
Boyd Gaming
BYD
$6.64B
$1K ﹤0.01%
2
-11
-85% -$155
BYD icon
4571
PUT
Boyd Gaming
BYD
$6.64B
$1K ﹤0.01%
+14
New +$198
CAAS icon
4572
CALL
China Automotive Systems
CAAS
$132M
$1K ﹤0.01%
+12
New +$93
CASY icon
4573
CALL
Casey's General Stores
CASY
$31.6B
$1K ﹤0.01%
+3
New +$267
CB icon
4574
PUT
Chubb
CB
$139B
$1K ﹤0.01%
2
-3
-60% -$323
CBRL icon
4575
PUT
Cracker Barrel
CBRL
$1.17B
$1K ﹤0.01%
+27
New +$3.85K
181 182
183
184 185

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Simplex Trading's Q2 2015 Portfolio in Review

As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.

Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.

By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.

On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.

  • Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
  • Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
  • Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
  • Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
  • Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
  • Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.

Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.