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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
GEOS icon
4651
PUT
Geospace Technologies
GEOS
$91.2M
$1K ﹤0.01%
+11
New +$230
GEVO icon
4652
CALL
Gevo
GEVO
$399M
– –
0
– –
GEVO icon
4653
Gevo
GEVO
$399M
$1K ﹤0.01%
1
– –
GGG icon
4654
Graco
GGG
$12.9B
$1K ﹤0.01%
+45
New +$1.08K
GIL icon
4655
PUT
Gildan
GIL
$9.33B
$1K ﹤0.01%
+33
New +$1.06K
GPC icon
4656
PUT
Genuine Parts
GPC
$17.4B
$1K ﹤0.01%
42
-14
-25% -$1.29K
GPN icon
4657
PUT
Global Payments
GPN
$22.6B
$1K ﹤0.01%
+4
New +$205
GSAT icon
4658
CALL
Globalstar
GSAT
$10.2B
$1K ﹤0.01%
4
-14
-78% -$544
GSAT icon
4659
Globalstar
GSAT
$10.2B
$1K ﹤0.01%
48
-1,553
-97% -$60.4K
GWRE icon
4660
CALL
Guidewire Software
GWRE
$12B
$1K ﹤0.01%
+90
New +$4.63K
GYRE icon
4661
Gyre Therapeutics
GYRE
$670M
$1K ﹤0.01%
1
– –
GYRE icon
4662
PUT
Gyre Therapeutics
GYRE
$670M
– –
0
– –
MCHB
4663
CALL
Mechanics Bancorp
MCHB
$3.51B
$1K ﹤0.01%
+1
New +$22
HMY icon
4664
Harmony Gold Mining
HMY
$9.99B
$1K ﹤0.01%
1,286
+762
+145% +$1.27K
HOLX
4665
CALL
DELISTED
Hologic
HOLX
$1K ﹤0.01%
3
-105
-97% -$3.67K
HOUS
4666
CALL
DELISTED
Anywhere Real Estate
HOUS
$1K ﹤0.01%
+13
New +$604
HQY icon
4667
PUT
HealthEquity
HQY
$7.97B
$1K ﹤0.01%
+6
New +$161
HST icon
4668
CALL
Host Hotels & Resorts
HST
$16.8B
$1K ﹤0.01%
52
+28
+117% +$564
PPLI
4669
PUT
People Inc
PPLI
$3.13B
$1K ﹤0.01%
67
+11
+20% +$146
IAU icon
4670
PUT
iShares Gold Trust
IAU
$63.4B
$1K ﹤0.01%
10
-36
-78% -$831
ICAD
4671
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
+564
New +$3.59K
ICAD
4672
PUT
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
+11
New +$70
IDCC icon
4673
CALL
InterDigital
IDCC
$6.76B
$1K ﹤0.01%
+15
New +$837
IMKTA icon
4674
PUT
Ingles Markets
IMKTA
$1.65B
$1K ﹤0.01%
53
-29
-35% -$1.4K
IMMR icon
4675
PUT
Immersion
IMMR
$230M
$1K ﹤0.01%
30
+13
+76% +$147
185 186
187
188 189

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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.