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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
+0.54%
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
$1.19B
AUM Growth
+$333M
Cap. Flow
+$279M
Cap. Flow %
23.35%
Top 10 Hldgs %
20.47%
Holding
6,639
New
1,607
Increased
1,829
Reduced
1,589
Closed
1,438

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.6M
2
AAPL icon
Apple
AAPL
+$29.1M
3
META icon
Meta Platforms (Facebook)
META
+$15.7M
4
IBM icon
IBM
IBM
+$13.8M
5
BIDU icon
Baidu
BIDU
+$10.6M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$10.1M
2
MCD icon
McDonald's
MCD
+$8.46M
3
RL icon
Ralph Lauren
RL
+$5.36M
4
INTC icon
Intel
INTC
+$5.04M
5
WBA
Walgreens Boots Alliance
WBA
+$4.76M

Sector Composition

Rank Sector Weight
1 Communication Services 14.27%
2 Technology 10.3%
3 Healthcare 7.76%
4 Consumer Discretionary 6.32%
5 Financials 5.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SCCO icon
4776
CALL
Southern Copper
SCCO
$141B
$1K ﹤0.01%
29
-41
-59% -$1.17K
SEE
4777
CALL
DELISTED
Sealed Air
SEE
$1K ﹤0.01%
13
-5
-28% -$240
SFM icon
4778
CALL
Sprouts Farmers Market
SFM
$7.04B
$1K ﹤0.01%
53
-58
-52% -$1.78K
SHOP icon
4779
CALL
Shopify
SHOP
$148B
$1K ﹤0.01%
+70
New +$219
SIGI icon
4780
PUT
Selective Insurance
SIGI
$5.74B
$1K ﹤0.01%
+4
New +$111
SLRC icon
4781
SLR Investment Corp
SLRC
$706M
$1K ﹤0.01%
+103
New +$2K
SNN icon
4782
CALL
Smith & Nephew
SNN
$12.9B
$1K ﹤0.01%
+39
New +$1.35K
SO icon
4783
CALL
Southern Company
SO
$110B
$1K ﹤0.01%
21
-34
-62% -$1.48K
SQQQ icon
4784
ProShares UltraPro Short QQQ
SQQQ
$2.21B
– –
0
– –
SRE icon
4785
CALL
Sempra
SRE
$60.8B
$1K ﹤0.01%
+12
New +$635
SRI icon
4786
PUT
Stoneridge
SRI
$209M
$1K ﹤0.01%
10
– –
SSL icon
4787
PUT
Sasol
SSL
$7.58B
$1K ﹤0.01%
9
-68
-88% -$2.51K
SSP icon
4788
PUT
E.W. Scripps
SSP
$274M
$1K ﹤0.01%
17
-13
-43% -$305
SSTK icon
4789
CALL
Shutterstock
SSTK
$205M
$1K ﹤0.01%
+9
New +$588
STAA icon
4790
PUT
STAAR Surgical
STAA
$1.16B
$1K ﹤0.01%
+5
New +$46
STM icon
4791
PUT
STMicroelectronics
STM
$46B
$1K ﹤0.01%
14
-32
-70% -$274
SUN icon
4792
CALL
Sunoco
SUN
$14.2B
$1K ﹤0.01%
+43
New +$2.07K
SVM
4793
PUT
Silvercorp Metals
SVM
$2.13B
$1K ﹤0.01%
21
– –
TCBI icon
4794
CALL
Texas Capital Bancshares
TCBI
$4.31B
$1K ﹤0.01%
7
-94
-93% -$5.15K
TD icon
4795
CALL
Toronto Dominion Bank
TD
$198B
$1K ﹤0.01%
106
+15
+16% +$672
TDG icon
4796
CALL
TransDigm Group
TDG
$69.2B
$1K ﹤0.01%
15
+14
+1,400% +$3.14K
TDW icon
4797
CALL
Tidewater
TDW
$3.91B
$1K ﹤0.01%
+2
New +$1.63K
TDW icon
4798
PUT
Tidewater
TDW
$3.91B
– –
-1
Closed -$813
TGNA
4799
PUT
DELISTED
TEGNA Inc
TGNA
$1K ﹤0.01%
69
-11
-14% -$207
TISI icon
4800
PUT
Team
TISI
$77.7M
$1K ﹤0.01%
+1
New +$400
190 191
192
193 194

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Simplex Trading's Q2 2015 Portfolio in Review

As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.

Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.

By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.

On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.

  • Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
  • Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
  • Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
  • Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
  • Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
  • Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.

Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.