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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
SVXY icon
6426
ProShares Short VIX Short-Term Futures ETF
SVXY
$220M
– –
-50,237
Closed -$2.54M
TAL icon
6427
TAL Education Group
TAL
$5.71B
– –
-29,076
Closed -$267K
TAL icon
6428
PUT
TAL Education Group
TAL
$5.71B
– –
-714
Closed -$30K
TBPH icon
6429
PUT
Theravance Biopharma
TBPH
$874M
– –
-9
Closed -$1K
TCBI icon
6430
Texas Capital Bancshares
TCBI
$4.31B
– –
-21,373
Closed -$958K
TCOM icon
6431
Trip.com Group
TCOM
$27.5B
– –
-18,085
Closed -$789K
TDG icon
6432
TransDigm Group
TDG
$69.2B
– –
-353
Closed -$86.2K
TDOC icon
6433
CALL
Teladoc Health
TDOC
$1.58B
– –
-33
Closed -$4K
TDOC icon
6434
PUT
Teladoc Health
TDOC
$1.58B
– –
-19
Closed -$9K
TDS icon
6435
CALL
Telephone and Data Systems
TDS
$3.91B
– –
-18
Closed -$3K
TDW icon
6436
CALL
Tidewater
TDW
$3.91B
– –
-1
Closed -$1K
TDW icon
6437
Tidewater
TDW
$3.91B
– –
-15
Closed -$3.07K
TFSL icon
6438
CALL
TFS Financial
TFSL
$5.1B
– –
-15
Closed -$1K
TG icon
6439
Tredegar Corp
TG
$268M
– –
-1,469
Closed -$23K
TGI
6440
DELISTED
Triumph Group
TGI
– –
-2,858
Closed -$103K
THM
6441
International Tower Hill Mines
THM
$534M
– –
-400
Closed –
THO icon
6442
Thor Industries
THO
$3.99B
– –
-1,273
Closed -$81.4K
THRM icon
6443
Gentherm
THRM
$1.31B
– –
-355
Closed -$13.5K
THRM icon
6444
PUT
Gentherm
THRM
$1.31B
– –
-16
Closed -$3K
TIMB icon
6445
CALL
TIM SA
TIMB
$10.2B
– –
-146
Closed -$54K
TKC icon
6446
CALL
Turkcell
TKC
$4.84B
– –
-97
Closed -$19K
TK icon
6447
Teekay
TK
$975M
– –
-1,131
Closed -$10.6K
TKR icon
6448
Timken Company
TKR
$9.82B
– –
-16,533
Closed -$555K
TKR icon
6449
PUT
Timken Company
TKR
$9.82B
– –
-34
Closed -$1K
TLPH icon
6450
PUT
Talphera
TLPH
$70.1M
– –
-4
Closed -$14K
256 257
258
259 260

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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.