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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
+6.87%
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
$2.45B
AUM Growth
+$147M
Cap. Flow
+$26.3M
Cap. Flow %
1.07%
Top 10 Hldgs %
23.61%
Holding
7,357
New
1,313
Increased
2,078
Reduced
2,339
Closed
1,500

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$45.9M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$30.1M
3
TWX
Time Warner Inc
TWX
+$25.8M
4
BKNG icon
Booking.com
BKNG
+$22.5M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$17.7M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$43.6M
2
AMGN icon
Amgen
AMGN
+$33.2M
3
BIDU icon
Baidu
BIDU
+$19.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$17.3M
5
MU icon
Micron Technology
MU
+$17.1M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 14.31%
2 Technology 13.17%
3 Communication Services 11.81%
4 Healthcare 4.06%
5 Financials 3.84%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TERP
501
DELISTED
TerraForm Power, Inc
TERP
$723K 0.03%
54,732
-29,473
-35% -$384K
CRTO icon
502
Criteo
CRTO
$1.06B
$721K 0.03%
17,391
+17,291
+17,291% +$824K
BWLD
503
DELISTED
Buffalo Wild Wings, Inc.
BWLD
$719K 0.03%
6,807
+2,856
+72% +$318K
PNK
504
DELISTED
Pinnacle Entertainment Inc.
PNK
$716K 0.03%
+33,606
New +$661K
AU icon
505
AngloGold Ashanti
AU
$41B
$713K 0.03%
76,786
+46,977
+158% +$454K
MOS icon
506
PUT
The Mosaic Company
MOS
$7.24B
$708K 0.03%
1,234
-355
-22% -$7.69K
KBE icon
507
State Street SPDR S&P Bank ETF
KBE
$1.64B
$707K 0.03%
15,680
+1,291
+9% +$55.3K
CSOD
508
DELISTED
Cornerstone OnDemand, Inc.
CSOD
$705K 0.03%
17,368
+4,073
+31% +$151K
BEAT
509
DELISTED
BioTelemetry, Inc.
BEAT
$703K 0.03%
+21,308
New +$738K
CMA
510
DELISTED
Comerica
CMA
$701K 0.03%
9,203
+4,887
+113% +$350K
IYT icon
511
iShares US Transportation ETF
IYT
$2.33B
$700K 0.03%
+15,704
New +$667K
CBI
512
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
$697K 0.03%
1,122
-1,558
-58% -$23.9K
FC icon
513
Franklin Covey
FC
$241M
$696K 0.03%
34,323
+13,062
+61% +$243K
TFCF
514
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
$691K 0.03%
26,796
+22,386
+508% +$608K
PTLA
515
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
$685K 0.03%
12,686
+3,387
+36% +$199K
RDS.A
516
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
$684K 0.03%
11,294
-15,915
-58% -$890K
EQIX icon
517
Equinix
EQIX
$101B
$683K 0.03%
1,531
+901
+143% +$404K
PTCT icon
518
PTC Therapeutics
PTCT
$6.5B
$681K 0.03%
34,050
+6,883
+25% +$135K
WY icon
519
Weyerhaeuser
WY
$17.2B
$680K 0.03%
+20,002
New +$657K
AMTD
520
DELISTED
TD Ameritrade Holding Corp
AMTD
$679K 0.03%
13,932
-38,515
-73% -$1.73M
RDS.A
521
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
$678K 0.03%
1,362
-295
-18% -$16.5K
LULU icon
522
CALL
lululemon athletica
LULU
$12.9B
$677K 0.03%
2,007
-1,305
-39% -$78.6K
WMT icon
523
CALL
Walmart Inc
WMT
$870B
$676K 0.03%
18,462
+3,609
+24% +$94.7K
RDUS
524
DELISTED
Radius Recycling
RDUS
$674K 0.03%
23,972
+5,958
+33% +$156K
LUMO
525
DELISTED
Lumos Pharma, Inc. Common Stock
LUMO
$674K 0.03%
+7,366
New +$565K
19 20
21
22 23

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Simplex Trading's Q3 2017 Portfolio in Review

As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
  • Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
  • Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
  • Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
  • Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
  • Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.

Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.