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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
+2.14%
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
$860M
AUM Growth
+$34.4M
Cap. Flow
-$17.8M
Cap. Flow %
-2.07%
Top 10 Hldgs %
14.96%
Holding
6,670
New
1,973
Increased
1,386
Reduced
1,513
Closed
1,643

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$40.1M
2
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$12.5M
3
BABA icon
Alibaba
BABA
+$10.5M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$9.89M
5
INTC icon
Intel
INTC
+$9.83M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$35.7M
2
GILD icon
Gilead Sciences
GILD
+$32.3M
3
AMZN icon
Amazon
AMZN
+$29M
4
BKNG icon
Booking.com
BKNG
+$28.4M
5
BIDU icon
Baidu
BIDU
+$13.3M

Sector Composition

Rank Sector Weight
1 Communication Services 7.76%
2 Consumer Discretionary 7.62%
3 Healthcare 7.24%
4 Technology 6.95%
5 Financials 4.83%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TGNA
3901
PUT
DELISTED
TEGNA Inc
TGNA
$3K ﹤0.01%
80
-8
-9% -$141
THS
3902
DELISTED
Treehouse Foods
THS
$3K ﹤0.01%
+36
New +$3.11K
TRMB icon
3903
Trimble
TRMB
$13.5B
$3K ﹤0.01%
154
-4,246
-97% -$109K
TROX icon
3904
CALL
Tronox
TROX
$991M
$3K ﹤0.01%
+87
New +$1.85K
TS icon
3905
Tenaris
TS
$28.2B
$3K ﹤0.01%
+133
New +$3.8K
TTWO icon
3906
CALL
Take-Two Interactive
TTWO
$45.9B
$3K ﹤0.01%
24
-78
-76% -$2.12K
TTWO icon
3907
PUT
Take-Two Interactive
TTWO
$45.9B
$3K ﹤0.01%
+4
New +$109
TWI icon
3908
CALL
Titan International
TWI
$532M
$3K ﹤0.01%
+22
New +$214
UGA icon
3909
CALL
United States Gasoline Fund
UGA
$142M
$3K ﹤0.01%
+97
New +$3.32K
UIS icon
3910
PUT
Unisys
UIS
$253M
$3K ﹤0.01%
19
-57
-75% -$1.39K
URBN icon
3911
PUT
Urban Outfitters
URBN
$6.41B
$3K ﹤0.01%
216
-69
-24% -$2.68K
UVV icon
3912
CALL
Universal Corp
UVV
$1.37B
$3K ﹤0.01%
7
+2
+40% +$88
VANI icon
3913
PUT
Vivani Medical
VANI
$110M
– –
0
– –
VIV icon
3914
PUT
Telefônica Brasil
VIV
$21.2B
$3K ﹤0.01%
+18
New +$319
VNDA icon
3915
PUT
Vanda Pharmaceuticals
VNDA
$309M
$3K ﹤0.01%
11
-41
-79% -$463
VNET
3916
CALL
VNET Group
VNET
$1.9B
$3K ﹤0.01%
+44
New +$762
VRNT
3917
CALL
DELISTED
Verint Systems
VRNT
$3K ﹤0.01%
+29
New +$853
W icon
3918
PUT
Wayfair
W
$12.3B
$3K ﹤0.01%
+15
New +$373
WEN icon
3919
CALL
Wendy's
WEN
$1.44B
$3K ﹤0.01%
23
-25
-52% -$267
WOR icon
3920
PUT
Worthington Enterprises
WOR
$2.84B
$3K ﹤0.01%
29
+24
+480% +$412
WRB icon
3921
CALL
W.R. Berkley
WRB
$28.3B
$3K ﹤0.01%
+47
New +$699
WTI icon
3922
W&T Offshore
WTI
$478M
$3K ﹤0.01%
+770
New +$4.47K
WU icon
3923
CALL
Western Union
WU
$2.57B
$3K ﹤0.01%
+30
New +$559
SMC
3924
Summit Midstream
SMC
$414M
$3K ﹤0.01%
7
-114
-94% -$60.6K
GAP
3925
CALL
The Gap Inc
GAP
$7.26B
$3K ﹤0.01%
47
-70
-60% -$2.92K
155 156
157
158 159

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Simplex Trading's Q1 2015 Portfolio in Review

As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.

By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
  • Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
  • Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
  • Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
  • Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
  • Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
  • Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.

Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.