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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
ANIP icon
5751
ANI Pharmaceuticals
ANIP
$1.84B
– –
-745
Closed -$36.2K
YDKG
5752
Yueda Digital Holding
YDKG
$5.25M
– –
-12
Closed -$112K
AORT icon
5753
CALL
Artivion
AORT
$1.31B
– –
-30
Closed -$1K
BNBX
5754
CALL
DELISTED
BNB PLUS CORP
BNBX
– –
0
– -$1K
BNBX
5755
PUT
DELISTED
BNB PLUS CORP
BNBX
– –
0
– -$10K
APTV icon
5756
CALL
Aptiv
APTV
$12.6B
– –
-49
Closed -$4K
ARAY icon
5757
CALL
Accuray
ARAY
$29M
– –
-35
Closed -$1K
ARAY icon
5758
Accuray
ARAY
$29M
– –
-606
Closed -$3.31K
ARAY icon
5759
PUT
Accuray
ARAY
$29M
– –
-30
Closed -$1K
ARCB icon
5760
CALL
ArcBest
ARCB
$3.33B
– –
-27
Closed -$3K
ARCO icon
5761
Arcos Dorados Holdings
ARCO
$1.77B
– –
-1,147
Closed -$4.87K
ARES icon
5762
CALL
Ares Management
ARES
$28.8B
– –
-14
Closed -$3K
ARLP icon
5763
CALL
Alliance Resource Partners
ARLP
$3.33B
– –
-57
Closed -$2K
AROC icon
5764
PUT
Archrock
AROC
$6.19B
– –
-14
Closed -$1K
ARR
5765
CALL
Armour Residential REIT
ARR
$2.04B
– –
-12
Closed -$4K
ASB icon
5766
Associated Banc-Corp
ASB
$5.86B
– –
-435
Closed -$7K
ASC icon
5767
CALL
Ardmore Shipping
ASC
$669M
– –
-50
Closed -$1K
EFOR
5768
CALL
Everforth Inc
EFOR
$953M
– –
-17
Closed -$1K
EFOR
5769
PUT
Everforth Inc
EFOR
$953M
– –
-87
Closed -$2K
ASR icon
5770
Grupo Aeroportuario del Sureste
ASR
$8.14B
– –
-509
Closed -$77.6K
ASRT
5771
DELISTED
Assertio
ASRT
– –
-183
Closed -$200K
ASRT
5772
PUT
DELISTED
Assertio
ASRT
– –
-5
Closed -$111K
ATEN icon
5773
A10 Networks
ATEN
$2.25B
– –
-3,359
Closed -$21.2K
ATEN icon
5774
PUT
A10 Networks
ATEN
$2.25B
– –
-30
Closed -$11K
ATHE
5775
Alterity Therapeutics
ATHE
$82.8M
– –
-23
Closed –
229 230
231
232 233

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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.