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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
TLYS icon
4801
PUT
Tilly's
TLYS
$115M
$1K ﹤0.01%
+2
New +$25
TNK icon
4802
PUT
Teekay Tankers
TNK
$2.63B
$1K ﹤0.01%
+3
New +$161
TNXP icon
4803
PUT
Tonix Pharmaceuticals
TNXP
$157M
– –
0
– –
TOUR
4804
CALL
Tuniu
TOUR
$55.4M
– –
0
– –
TRMB icon
4805
PUT
Trimble
TRMB
$12.3B
$1K ﹤0.01%
+18
New +$440
TRX icon
4806
TRX Gold Corp
TRX
$255M
$1K ﹤0.01%
5,000
-15,000
-75% -$5.18K
TSCO icon
4807
PUT
Tractor Supply
TSCO
$16.3B
$1K ﹤0.01%
+75
New +$1.33K
TX icon
4808
CALL
Ternium
TX
$9.29B
$1K ﹤0.01%
+78
New +$1.54K
UAN icon
4809
PUT
CVR Partners
UAN
$1.3B
– –
-1
Closed -$137
UBSI icon
4810
CALL
United Bankshares
UBSI
$6.55B
$1K ﹤0.01%
+5
New +$191
UEIC icon
4811
PUT
Universal Electronics
UEIC
$57.2M
$1K ﹤0.01%
+26
New +$1.4K
UGI icon
4812
PUT
UGI
UGI
$8B
$1K ﹤0.01%
+10
New +$355
UHT
4813
Universal Health Realty Income Trust
UHT
$608M
$1K ﹤0.01%
+31
New +$1.54K
UNIT
4814
CALL
Uniti Group
UNIT
$2.63B
$1K ﹤0.01%
+30
New +$809
UNM icon
4815
CALL
Unum
UNM
$13.8B
$1K ﹤0.01%
+24
New +$839
USAC icon
4816
PUT
USA Compression Partners
USAC
$3.82B
$1K ﹤0.01%
+14
New +$301
USPH icon
4817
CALL
US Physical Therapy
USPH
$1.14B
$1K ﹤0.01%
1
-14
-93% -$693
UVE icon
4818
CALL
Universal Insurance Holdings
UVE
$1.16B
$1K ﹤0.01%
14
+10
+250% +$255
VNDA icon
4819
CALL
Vanda Pharmaceuticals
VNDA
$312M
$1K ﹤0.01%
+28
New +$302
VNDA icon
4820
PUT
Vanda Pharmaceuticals
VNDA
$312M
$1K ﹤0.01%
7
-4
-36% -$43
VRA icon
4821
CALL
Vera Bradley
VRA
$105M
$1K ﹤0.01%
107
+52
+95% +$704
VTR icon
4822
PUT
Ventas
VTR
$48.9B
$1K ﹤0.01%
5
-67
-93% -$5.23K
WLK icon
4823
PUT
Westlake Corp
WLK
$9.46B
$1K ﹤0.01%
74
-52
-41% -$3.78K
WM icon
4824
CALL
Waste Management
WM
$95.9B
$1K ﹤0.01%
20
-2
-9% -$101
WNC icon
4825
CALL
Wabash National
WNC
$543M
$1K ﹤0.01%
+44
New +$613
191 192
193
194 195

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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.