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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
-0.41%
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
$1.25B
AUM Growth
-$22.5M
Cap. Flow
-$16M
Cap. Flow %
-1.28%
Top 10 Hldgs %
17.26%
Holding
7,084
New
1,678
Increased
2,214
Reduced
1,528
Closed
1,505

Top Buys

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$33.7M
2
GLD icon
SPDR Gold Trust
GLD
+$17.8M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$14.3M
4
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$11.9M
5
C icon
Citigroup
C
+$8.7M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.2M
2
GMCR
KEURIG GREEN MTN INC
GMCR
+$17.9M
3
CMG icon
Chipotle Mexican Grill
CMG
+$14.7M
4
DIS icon
Walt Disney
DIS
+$13.3M
5
BKNG icon
Booking.com
BKNG
+$12.1M

Sector Composition

Rank Sector Weight
1 Technology 7.64%
2 Communication Services 6.85%
3 Consumer Discretionary 4.92%
4 Healthcare 4.57%
5 Financials 4.22%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ACGL icon
5476
Arch Capital
ACGL
$36.1B
– –
-6,114
Closed -$139K
ACGL icon
5477
PUT
Arch Capital
ACGL
$36.1B
– –
-60
Closed -$49K
ACIC icon
5478
American Coastal Insurance
ACIC
$498M
– –
-14,130
Closed -$241K
ACLS icon
5479
CALL
Axcelis
ACLS
$4.12B
– –
-11
Closed -$1K
ACM icon
5480
Aecom
ACM
$9.07B
– –
-3,874
Closed -$108K
ACN icon
5481
Accenture
ACN
$89.9B
– –
-3,375
Closed -$347K
ACTG icon
5482
Acacia Research
ACTG
$450M
$0 ﹤0.01%
+205
New +$752
ACTG icon
5483
PUT
Acacia Research
ACTG
$450M
– –
-25
Closed -$3K
ADP icon
5484
Automatic Data Processing
ADP
$100B
– –
-230
Closed -$19.3K
AEE icon
5485
Ameren
AEE
$31.5B
– –
-346
Closed -$16K
AEIS icon
5486
Advanced Energy
AEIS
$12.2B
– –
-32
Closed -$936
AEO icon
5487
American Eagle Outfitters
AEO
$2.85B
– –
-4,727
Closed -$71.1K
AFG icon
5488
CALL
American Financial Group
AFG
$11.9B
– –
-8
Closed -$1K
AG icon
5489
First Majestic Silver
AG
$8.05B
– –
-6,496
Closed -$28.3K
AGCO icon
5490
CALL
AGCO
AGCO
$8.78B
– –
-53
Closed -$2K
AGI icon
5491
PUT
Alamos Gold
AGI
$12.4B
– –
-60
Closed -$3K
AGRO icon
5492
CALL
Adecoagro
AGRO
$1.53B
– –
-45
Closed -$3K
AGRO icon
5493
Adecoagro
AGRO
$1.53B
– –
-4,358
Closed -$52.9K
AHT
5494
Ashford Hospitality Trust
AHT
$21M
– –
-3
Closed -$16.3K
AHT
5495
PUT
Ashford Hospitality Trust
AHT
$21M
– –
0
– -$26K
AIG icon
5496
American International
AIG
$41.9B
– –
-88,969
Closed -$4.81M
AIR icon
5497
CALL
AAR Corp
AIR
$5.15B
– –
-175
Closed -$34K
ALB icon
5498
Albemarle
ALB
$13.5B
– –
-6,085
Closed -$334K
ALB icon
5499
PUT
Albemarle
ALB
$13.5B
– –
-86
Closed -$7K
ALE
5500
CALL
DELISTED
Allete
ALE
– –
-4
Closed -$1K
218 219
220
221 222

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Simplex Trading's Q1 2016 Portfolio in Review

As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.

By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

  • Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
  • Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
  • Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
  • Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
  • Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
  • Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
  • Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.

Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.