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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
+8.02%
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
$1.48B
AUM Growth
-$21.1M
Cap. Flow
-$87.1M
Cap. Flow %
-5.91%
Top 10 Hldgs %
17.83%
Holding
7,235
New
1,460
Increased
2,220
Reduced
1,939
Closed
1,479

Top Buys

Rank Stock Value
1
GILD icon
Gilead Sciences
GILD
+$17.3M
2
AAPL icon
Apple
AAPL
+$15.2M
3
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$14.9M
4
BKNG icon
Booking.com
BKNG
+$14.7M
5
WFC icon
Wells Fargo
WFC
+$12.9M

Top Sells

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$38.3M
2
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
+$30.7M
3
LNKD
LinkedIn Corporation
LNKD
+$15.2M
4
CELG
Celgene Corp
CELG
+$12.6M
5
TBT icon
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
+$10.4M

Sector Composition

Rank Sector Weight
1 Communication Services 8.39%
2 Healthcare 8.28%
3 Consumer Discretionary 6.84%
4 Technology 6.06%
5 Financials 4.39%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AMED
5726
PUT
DELISTED
Amedisys
AMED
– –
-8
Closed -$1K
AMH icon
5727
CALL
American Homes 4 Rent
AMH
$12B
– –
-2
Closed -$1K
AMSC icon
5728
CALL
American Superconductor
AMSC
$1.48B
– –
-50
Closed -$9K
AN icon
5729
CALL
AutoNation
AN
$6.97B
– –
-12
Closed -$1K
ANDE icon
5730
CALL
Andersons Inc
ANDE
$2.65B
– –
-4
Closed -$3K
ANET icon
5731
Arista Networks
ANET
$219B
– –
-9,712
Closed -$46.3K
ANGI icon
5732
PUT
Angi Inc
ANGI
$224M
– –
-2
Closed -$2K
ANSS
5733
DELISTED
Ansys
ANSS
– –
-118
Closed -$11K
YDKG
5734
CALL
Yueda Digital Holding
YDKG
$5M
– –
0
– -$1K
AON icon
5735
CALL
Aon
AON
$77.3B
– –
-49
Closed -$48K
AORT icon
5736
Artivion
AORT
$1.23B
– –
-2,783
Closed -$42.1K
AORT icon
5737
PUT
Artivion
AORT
$1.23B
– –
-21
Closed -$3K
APEI icon
5738
American Public Education
APEI
$875M
– –
-147
Closed -$3.56K
APTV icon
5739
Aptiv
APTV
$12B
– –
-13,577
Closed -$916K
ARCB icon
5740
ArcBest
ARCB
$3.44B
– –
-622
Closed -$11.3K
ARCB icon
5741
PUT
ArcBest
ARCB
$3.44B
– –
-55
Closed -$2K
ARCC icon
5742
Ares Capital
ARCC
$13.5B
– –
-38,641
Closed -$593K
ARCO icon
5743
PUT
Arcos Dorados Holdings
ARCO
$1.73B
– –
-24
Closed -$4K
ARE icon
5744
CALL
Alexandria Real Estate Equities
ARE
$8.88B
– –
-62
Closed -$13K
ARE icon
5745
PUT
Alexandria Real Estate Equities
ARE
$8.88B
– –
-10
Closed -$1K
ARES icon
5746
Ares Management
ARES
$28.5B
$0 ﹤0.01%
+34
New +$585
ARI
5747
Apollo Commercial Real Estate
ARI
$887M
$0 ﹤0.01%
+16
New +$263
ARLP icon
5748
Alliance Resource Partners
ARLP
$3.18B
– –
-2,009
Closed -$39.4K
ARMK icon
5749
CALL
Aramark
ARMK
$15B
– –
-217
Closed -$3K
ARMK icon
5750
Aramark
ARMK
$15B
– –
-4,005
Closed -$106K
228 229
230
231 232

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Simplex Trading's Q3 2016 Portfolio in Review

As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.

Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.

By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.

  • Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
  • Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
  • Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
  • Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
  • Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
  • Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
  • Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.

Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.