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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
+4.52%
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
$2.3B
AUM Growth
-$8.99M
Cap. Flow
-$114M
Cap. Flow %
-4.94%
Top 10 Hldgs %
22.88%
Holding
7,527
New
1,408
Increased
2,202
Reduced
2,320
Closed
1,474

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$83.1M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$37.2M
3
AMGN icon
Amgen
AMGN
+$30.5M
4
MU icon
Micron Technology
MU
+$28.8M
5
QCOM icon
Qualcomm
QCOM
+$18.2M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$29.5M
2
GS icon
Goldman Sachs
GS
+$27.8M
3
GILD icon
Gilead Sciences
GILD
+$27.6M
4
BKNG icon
Booking.com
BKNG
+$25.4M
5
T icon
AT&T
T
+$19.6M

Sector Composition

Rank Sector Weight
1 Technology 13.55%
2 Communication Services 11.57%
3 Consumer Discretionary 9.69%
4 Healthcare 7.28%
5 Financials 4.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ADAM
5301
Adamas Trust
ADAM
$779M
$2K ﹤0.01%
82
-158
-66% -$3.98K
ODFL icon
5302
CALL
Old Dominion Freight Line
ODFL
$47.5B
$2K ﹤0.01%
15
-6
-29% -$177
OGS icon
5303
PUT
ONE Gas
OGS
$5.11B
$2K ﹤0.01%
+10
New +$697
OMC icon
5304
PUT
Omnicom Group
OMC
$24.6B
$2K ﹤0.01%
159
+9
+6% +$750
OMEX icon
5305
CALL
Odyssey Marine Exploration
OMEX
$40.4M
$2K ﹤0.01%
60
-22
-27% -$79
ACH
5306
CALL
Accendra Health
ACH
$240M
$2K ﹤0.01%
+5
New +$164
ORC
5307
CALL
Orchid Island Capital
ORC
$1.3B
$2K ﹤0.01%
43
-4
-9% -$206
ORI icon
5308
PUT
Old Republic International
ORI
$10.7B
$2K ﹤0.01%
32
+6
+23% +$120
ORN icon
5309
Orion Group Holdings
ORN
$483M
$2K ﹤0.01%
+355
New +$2.65K
OSUR icon
5310
PUT
OraSure Technologies
OSUR
$278M
$2K ﹤0.01%
+53
New +$763
OXM icon
5311
PUT
Oxford Industries
OXM
$624M
$2K ﹤0.01%
+39
New +$2.25K
PAYX icon
5312
PUT
Paychex
PAYX
$42.3B
$2K ﹤0.01%
34
-176
-84% -$10.3K
PB icon
5313
CALL
Prosperity Bancshares
PB
$8.78B
$2K ﹤0.01%
20
-55
-73% -$3.62K
PK icon
5314
CALL
Park Hotels & Resorts
PK
$3.03B
$2K ﹤0.01%
+10
New +$264
PKOH icon
5315
CALL
Park-Ohio Holdings
PKOH
$561M
$2K ﹤0.01%
+5
New +$187
PNR icon
5316
PUT
Pentair
PNR
$10.5B
$2K ﹤0.01%
192
-121
-39% -$5.29K
POWI icon
5317
PUT
Power Integrations
POWI
$3.32B
$2K ﹤0.01%
+10
New +$331
PRA
5318
DELISTED
ProAssurance
PRA
$2K ﹤0.01%
43
– –
PRLB icon
5319
PUT
Protolabs
PRLB
$1.79B
$2K ﹤0.01%
59
+28
+90% +$1.69K
PTC icon
5320
PUT
PTC
PTC
$14.9B
$2K ﹤0.01%
74
-318
-81% -$17.5K
PWR icon
5321
PUT
Quanta Services
PWR
$87.9B
$2K ﹤0.01%
+45
New +$1.5K
QDEL icon
5322
CALL
QuidelOrtho
QDEL
$1.15B
$2K ﹤0.01%
8
-1
-11% -$25
QLYS icon
5323
CALL
Qualys
QLYS
$4.8B
$2K ﹤0.01%
42
-169
-80% -$6.79K
QUAD icon
5324
CALL
Quad
QUAD
$433M
$2K ﹤0.01%
55
-23
-29% -$547
RDN icon
5325
CALL
Radian Group
RDN
$5.21B
$2K ﹤0.01%
61
+34
+126% +$582
211 212
213
214 215

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Simplex Trading's Q2 2017 Portfolio in Review

As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.

By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.

  • Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
  • Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
  • Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
  • Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
  • Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
  • Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
  • Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.

Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.