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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
BCC icon
5801
Boise Cascade
BCC
$2.85B
– –
-21,883
Closed -$478K
BCO icon
5802
CALL
Brink's
BCO
$4.84B
– –
-10
Closed -$3K
BDC icon
5803
Belden
BDC
$4.04B
– –
-2,085
Closed -$130K
BDC icon
5804
PUT
Belden
BDC
$4.04B
– –
-128
Closed -$16K
BF.B icon
5805
Brown-Forman Class B
BF.B
$13.2B
– –
-5,625
Closed -$174K
BG icon
5806
Bunge Global
BG
$22.5B
– –
-16,016
Closed -$980K
BGFV
5807
DELISTED
Big 5 Sporting Goods
BGFV
– –
-8,667
Closed -$84.8K
BIDU icon
5808
Baidu
BIDU
$35.6B
– –
-16,101
Closed -$2.83M
BKE icon
5809
CALL
Buckle
BKE
$2.31B
– –
-13
Closed -$4K
BKNG icon
5810
Booking.com
BKNG
$153B
– –
-150,600
Closed -$7.82M
BLDR icon
5811
Builders FirstSource
BLDR
$7.97B
– –
-7,496
Closed -$86.5K
BLDR icon
5812
PUT
Builders FirstSource
BLDR
$7.97B
– –
-66
Closed -$10K
BLKB icon
5813
Blackbaud
BLKB
$1.66B
– –
-242
Closed -$15.3K
BLKB icon
5814
PUT
Blackbaud
BLKB
$1.66B
– –
-38
Closed -$8K
BMA icon
5815
Banco Macro
BMA
$5.71B
– –
-136
Closed -$8.95K
BMI icon
5816
CALL
Badger Meter
BMI
$3.88B
– –
-90
Closed -$32K
BND icon
5817
Vanguard Total Bond Market
BND
$158B
– –
-222
Closed -$18.4K
BNDX icon
5818
Vanguard Total International Bond ETF
BNDX
$82.3B
– –
-100
Closed -$5K
BOIL icon
5819
ProShares Ultra Bloomberg Natural Gas
BOIL
$325M
– –
-3
Closed -$328K
BPT
5820
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
– –
-1,655
Closed -$24.6K
BRF icon
5821
VanEck Brazil Small-Cap ETF
BRF
$21.8M
– –
-2,044
Closed -$25K
BRKR icon
5822
Bruker
BRKR
$9.46B
$0 ﹤0.01%
+35
New +$935
BXP icon
5823
Boston Properties
BXP
$11B
– –
-1,244
Closed -$160K
BZH icon
5824
Beazer Homes USA
BZH
$920M
– –
-2,372
Closed -$19.2K
C icon
5825
Citigroup
C
$222B
– –
-333,172
Closed -$14.7M
231 232
233
234 235

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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.