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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
HMY icon
5301
CALL
Harmony Gold Mining
HMY
$9.7B
$1K ﹤0.01%
85
-544
-86% -$1.88K
HOLX
5302
CALL
DELISTED
Hologic
HOLX
$1K ﹤0.01%
+14
New +$485
HPP
5303
CALL
Hudson Pacific Properties
HPP
$765M
$1K ﹤0.01%
+1
New +$202
HSIC icon
5304
PUT
Henry Schein
HSIC
$9.76B
$1K ﹤0.01%
+79
New +$5.34K
HXL icon
5305
CALL
Hexcel
HXL
$8.3B
$1K ﹤0.01%
22
+14
+175% +$612
IBN icon
5306
CALL
ICICI Bank
IBN
$109B
$1K ﹤0.01%
77
-233
-75% -$1.5K
ICAD
5307
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
+197
New +$1.03K
ICAD
5308
PUT
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
+25
New +$131
ICLR icon
5309
PUT
Icon
ICLR
$13.9B
$1K ﹤0.01%
+6
New +$412
ICMB icon
5310
PUT
Investcorp Credit Management BDC
ICMB
$11M
$1K ﹤0.01%
6
– –
IEMG icon
5311
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$147B
$1K ﹤0.01%
+14
New +$574
IEP icon
5312
CALL
Icahn Enterprises
IEP
$5.26B
$1K ﹤0.01%
20
-92
-82% -$5.25K
IEX icon
5313
PUT
IDEX
IEX
$16.6B
$1K ﹤0.01%
+49
New +$4.08K
INSG icon
5314
CALL
Inseego
INSG
$111M
$1K ﹤0.01%
+8
New +$123
IPGP icon
5315
CALL
IPG Photonics
IPGP
$3.57B
$1K ﹤0.01%
77
+45
+141% +$3.96K
ITRI icon
5316
PUT
Itron
ITRI
$4.75B
$1K ﹤0.01%
17
-10
-37% -$422
JAKK icon
5317
PUT
Jakks Pacific
JAKK
$305M
$1K ﹤0.01%
+5
New +$375
JBL icon
5318
CALL
Jabil
JBL
$31.7B
$1K ﹤0.01%
79
+33
+72% +$601
KGC icon
5319
PUT
Kinross Gold
KGC
$28.1B
$1K ﹤0.01%
76
-52
-41% -$248
KOPN icon
5320
CALL
Kopin
KOPN
$654M
$1K ﹤0.01%
141
+65
+86% +$125
KPTI icon
5321
PUT
Karyopharm Therapeutics
KPTI
$161M
– –
0
– –
KTCC icon
5322
CALL
Key Tronic
KTCC
$43.4M
$1K ﹤0.01%
+22
New +$165
LCII icon
5323
PUT
LCI Industries
LCII
$2.62B
$1K ﹤0.01%
+97
New +$6.98K
LCTX icon
5324
Lineage Cell Therapeutics
LCTX
$267M
$1K ﹤0.01%
816
-6,854
-89% -$16.8K
LDOS icon
5325
CALL
Leidos
LDOS
$14.9B
$1K ﹤0.01%
15
+14
+1,400% +$692
211 212
213
214 215

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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.