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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
INSM icon
5476
PUT
Insmed
INSM
$23.2B
– –
-214
Closed -$11K
INVE icon
5477
Identive
INVE
$64.6M
$0 ﹤0.01%
+78
New +$613
IPG
5478
DELISTED
Interpublic Group of Companies
IPG
– –
-1,850
Closed -$38.4K
ITB icon
5479
iShares US Home Construction ETF
ITB
$2.41B
– –
-4,871
Closed -$137K
ITGR icon
5480
Integer Holdings
ITGR
$3.35B
– –
-151
Closed -$7.36K
ITT icon
5481
CALL
ITT
ITT
$17.5B
– –
-38
Closed -$2K
ITRI icon
5482
CALL
Itron
ITRI
$3.73B
– –
-22
Closed -$5K
ITRI icon
5483
PUT
Itron
ITRI
$3.73B
– –
-25
Closed -$2K
ITUB icon
5484
Itaú Unibanco
ITUB
$91.3B
– –
-11,888
Closed -$55.9K
ITW icon
5485
PUT
Illinois Tool Works
ITW
$81.4B
– –
-19
Closed -$1K
IWB icon
5486
iShares Russell 1000 ETF
IWB
$47.7B
$0 ﹤0.01%
+7
New +$825
IWR icon
5487
iShares Russell Mid-Cap ETF
IWR
$56.8B
– –
-5,148
Closed -$222K
IWV icon
5488
iShares Russell 3000 ETF
IWV
$19.5B
– –
-243
Closed -$30K
IYT icon
5489
iShares US Transportation ETF
IYT
$2.33B
– –
-7,176
Closed -$280K
JBHT icon
5490
CALL
JB Hunt Transport Services
JBHT
$27.1B
– –
-9
Closed -$5K
JBL icon
5491
Jabil
JBL
$32.8B
– –
-72
Closed -$1.7K
JCI icon
5492
Johnson Controls International
JCI
$87.5B
– –
-183
Closed -$9.79K
KALU icon
5493
Kaiser Aluminum
KALU
$2.67B
– –
-85
Closed -$6K
OPLN
5494
CALL
Openlane
OPLN
$4.17B
– –
-50
Closed -$6K
OPLN
5495
PUT
Openlane
OPLN
$4.17B
– –
-69
Closed -$1K
KBH icon
5496
KB Home
KBH
$3.48B
– –
-74
Closed -$1.13K
KBR icon
5497
PUT
KBR
KBR
$4.68B
– –
-2
Closed -$1K
KDP icon
5498
Keurig Dr Pepper
KDP
$40.4B
– –
-3
Closed -$229
KDP icon
5499
PUT
Keurig Dr Pepper
KDP
$40.4B
– –
-47
Closed -$2K
KEP icon
5500
Korea Electric Power
KEP
$15.5B
– –
-1,400
Closed -$29.1K
218 219
220
221 222

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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.