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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
+5.12%
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
$1.5B
AUM Growth
+$242M
Cap. Flow
+$178M
Cap. Flow %
11.93%
Top 10 Hldgs %
18.61%
Holding
7,153
New
1,586
Increased
2,321
Reduced
1,709
Closed
1,363

Top Buys

Rank Stock Value
1
LNKD
LinkedIn Corporation
LNKD
+$21.4M
2
GLD icon
SPDR Gold Trust
GLD
+$17.3M
3
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
+$15M
4
BIIB icon
Biogen
BIIB
+$14.9M
5
V icon
Visa
V
+$14.1M

Top Sells

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$36.7M
2
GOOG icon
Alphabet (Google) Class C
GOOG
+$20.1M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$15.8M
4
C icon
Citigroup
C
+$14.7M
5
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$13.1M

Sector Composition

Rank Sector Weight
1 Communication Services 6.61%
2 Healthcare 6.55%
3 Technology 6.45%
4 Consumer Discretionary 4.54%
5 Financials 4.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MMSI icon
6201
CALL
Merit Medical Systems
MMSI
$4.43B
– –
-13
Closed -$1K
MMSI icon
6202
Merit Medical Systems
MMSI
$4.43B
$0 ﹤0.01%
+17
New +$327
MO icon
6203
Altria Group
MO
$122B
– –
-7,673
Closed -$491K
MOD icon
6204
CALL
Modine Manufacturing
MOD
$12.8B
– –
-10
Closed -$1K
CALY
6205
Callaway Golf Company
CALY
$3.26B
– –
-7,899
Closed -$76K
CALY
6206
PUT
Callaway Golf Company
CALY
$3.26B
– –
-132
Closed -$10K
MRC
6207
DELISTED
MRC Global
MRC
– –
-1,448
Closed -$20.1K
MRCY icon
6208
Mercury Systems
MRCY
$6.2B
– –
-844
Closed -$18.1K
MRVL icon
6209
Marvell Technology
MRVL
$174B
– –
-32,299
Closed -$323K
MSB
6210
Mesabi Trust
MSB
$295M
– –
-1,665
Closed -$15.1K
MSB
6211
PUT
Mesabi Trust
MSB
$295M
– –
-127
Closed -$6K
MSCI icon
6212
MSCI
MSCI
$40B
– –
-1,270
Closed -$96.1K
MSCI icon
6213
PUT
MSCI
MSCI
$40B
– –
-71
Closed -$7K
MSM icon
6214
MSC Industrial Direct
MSM
$7.02B
– –
-59
Closed -$4.38K
MSM icon
6215
PUT
MSC Industrial Direct
MSM
$7.02B
– –
-6
Closed -$1K
MTDR icon
6216
Matador Resources
MTDR
$6.31B
– –
-1,585
Closed -$34.1K
MTH icon
6217
Meritage Homes
MTH
$4.87B
– –
-2,742
Closed -$49.7K
MTW icon
6218
Manitowoc
MTW
$516M
– –
-1,750
Closed -$38K
MUB icon
6219
iShares National Muni Bond ETF
MUB
$45.1B
– –
-9,154
Closed -$1.02M
MUFG icon
6220
Mitsubishi UFJ Financial
MUFG
$258B
– –
-941
Closed -$4.45K
MUR icon
6221
Murphy Oil
MUR
$5.58B
– –
-8,590
Closed -$260K
MVO
6222
PUT
MV Oil Trust
MVO
$6.85M
– –
-10
Closed -$2K
MX icon
6223
Magnachip Semiconductor
MX
$128M
$0 ﹤0.01%
140
-1,869
-93% -$9.97K
MXL icon
6224
MaxLinear
MXL
$6.49B
– –
-4,527
Closed -$84K
NAT icon
6225
Nordic American Tanker
NAT
$1.37B
– –
-891
Closed -$13K
247 248
249
250 251

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Simplex Trading's Q2 2016 Portfolio in Review

As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.

By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.

On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.

  • Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
  • Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
  • Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
  • Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
  • Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
  • Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.

Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.