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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
DKL icon
5701
Delek Logistics
DKL
$3.04B
– –
-2,635
Closed -$74.7K
DLNG icon
5702
Dynagas LNG Partners
DLNG
$131M
– –
-364
Closed -$3.29K
DLTR icon
5703
Dollar Tree
DLTR
$23.1B
– –
-5,882
Closed -$464K
DOG
5704
ProShares Short Dow30
DOG
$96.8M
– –
-53
Closed -$4K
DORM icon
5705
CALL
Dorman Products
DORM
$4.01B
– –
-217
Closed -$74K
DOX icon
5706
Amdocs
DOX
$5.53B
– –
-55
Closed -$3.08K
DPZ icon
5707
Domino's
DPZ
$11B
– –
-2,820
Closed -$336K
DRD
5708
DRDGold
DRD
$1.82B
– –
-1,200
Closed -$3.85K
DRD
5709
PUT
DRDGold
DRD
$1.82B
– –
-12
Closed -$4K
DRRX
5710
CALL
DELISTED
DURECT Corp
DRRX
– –
-5
Closed -$1K
DTE icon
5711
DTE Energy
DTE
$31.1B
– –
-42
Closed -$3.03K
DX
5712
Dynex Capital
DX
$2.99B
– –
-21
Closed –
EA icon
5713
Electronic Arts
EA
$52.4B
– –
-31,558
Closed -$2.01M
EAT icon
5714
CALL
Brinker International
EAT
$8.02B
– –
-7
Closed -$1K
EAT icon
5715
Brinker International
EAT
$8.02B
– –
-411
Closed -$19.8K
EBAY icon
5716
eBay
EBAY
$48.6B
– –
-2,175
Closed -$52.9K
EBS icon
5717
Emergent Biosolutions
EBS
$375M
– –
-109
Closed -$3.85K
ED icon
5718
Consolidated Edison
ED
$41.6B
– –
-5,415
Closed -$384K
EDC icon
5719
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$147M
– –
-805
Closed -$37K
EEMV icon
5720
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.45B
– –
-68
Closed -$3K
EET icon
5721
ProShares Ultra MSCI Emerging Markets
EET
$34.8M
– –
-121
Closed -$5K
EFA icon
5722
iShares MSCI EAFE ETF
EFA
$76.4B
– –
-3,643
Closed -$213K
EFC
5723
PUT
Ellington Financial
EFC
$1.68B
– –
-52
Closed -$3K
EFOI icon
5724
CALL
Energy Focus
EFOI
$18.3M
– –
0
– -$1K
EFX icon
5725
Equifax
EFX
$20.3B
– –
-3,397
Closed -$357K
227 228
229
230 231

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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.