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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
RL icon
1226
PUT
Ralph Lauren
RL
$22.2B
$96K 0.01%
314
-315
-50% -$42.6K
SWK icon
1227
PUT
Stanley Black & Decker
SWK
$14.2B
$96K 0.01%
189
+57
+43% +$5.81K
VGK icon
1228
PUT
Vanguard FTSE Europe ETF
VGK
$30B
$96K 0.01%
508
+125
+33% +$7.07K
TAL
1229
PUT
DELISTED
TAL INTERNATIONAL GROUP, INC.
TAL
$96K 0.01%
75
+10
+15% +$379
AMT icon
1230
CALL
American Tower
AMT
$77.7B
$95K 0.01%
222
+67
+43% +$6.34K
DDS icon
1231
Dillards
DDS
$8.87B
$95K 0.01%
910
-376
-29% -$46.2K
ETR icon
1232
PUT
Entergy
ETR
$54.1B
$95K 0.01%
192
-28
-13% -$1.05K
ZBRA icon
1233
Zebra Technologies
ZBRA
$12.4B
$95K 0.01%
+863
New +$89.6K
INSY
1234
CALL
DELISTED
Insys Therapeutics, Inc.
INSY
$95K 0.01%
90
-26
-22% -$810
EEP
1235
DELISTED
Enbridge Energy Partners
EEP
$95K 0.01%
2,852
-325
-10% -$12K
MWE
1236
CALL
DELISTED
MARKWEST ENERGY PARTNERS, LP
MWE
$95K 0.01%
156
+81
+108% +$5.23K
NWBO
1237
CALL
DELISTED
Northwest Biotherapeutics, Inc. Common stock
NWBO
$95K 0.01%
205
+154
+302% +$1.35K
ALKS icon
1238
CALL
Alkermes
ALKS
$8.82B
$94K 0.01%
127
+34
+37% +$2.08K
BLMN icon
1239
Bloomin' Brands
BLMN
$680M
$94K 0.01%
4,444
+2,655
+148% +$59.8K
CVX icon
1240
CALL
Chevron
CVX
$388B
$94K 0.01%
1,011
-448
-31% -$47K
GPK icon
1241
Graphic Packaging
GPK
$3.26B
$94K 0.01%
6,751
+3,114
+86% +$44.6K
RTX icon
1242
CALL
RTX Corp
RTX
$287B
$94K 0.01%
799
+275
+52% +$20.2K
UPBD icon
1243
Upbound Group
UPBD
$1.19B
$94K 0.01%
3,320
-2,991
-47% -$89.8K
GTI
1244
DELISTED
GRAFTECH INTERNATIONAL LTD
GTI
$94K 0.01%
18,969
+16,627
+710% +$78.7K
ROSE
1245
DELISTED
ROSETTA RESOURCES INC
ROSE
$94K 0.01%
+4,105
New +$93.7K
DO
1246
CALL
DELISTED
Diamond Offshore Drilling
DO
$94K 0.01%
415
-9
-2% -$273
CPA icon
1247
Copa Holdings
CPA
$5.56B
$93K 0.01%
1,131
-2,803
-71% -$267K
FRPT icon
1248
PUT
Freshpet
FRPT
$2.83B
$93K 0.01%
102
-99
-49% -$2.07K
GT icon
1249
Goodyear
GT
$2.07B
$93K 0.01%
3,095
+2,077
+204% +$61.7K
HCI icon
1250
HCI Group
HCI
$2.28B
$93K 0.01%
2,122
-5,530
-72% -$248K
48 49
50
51 52

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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.