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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
TECS icon
6226
Direxion Daily Technology Bear 3x ETF
TECS
$75M
– –
0
– -$49K
TEF
6227
PUT
DELISTED
Telefonica
TEF
– –
-41
Closed -$8K
TEO icon
6228
Telecom Argentina
TEO
$5.87B
– –
-545
Closed -$9.21K
TEO icon
6229
PUT
Telecom Argentina
TEO
$5.87B
– –
-8
Closed -$1K
TER icon
6230
Teradyne
TER
$58.5B
– –
-1,951
Closed -$38.2K
TG icon
6231
CALL
Tredegar Corp
TG
$270M
– –
-100
Closed -$5K
TG icon
6232
PUT
Tredegar Corp
TG
$270M
– –
-15
Closed -$2K
TGT icon
6233
Target
TGT
$61.1B
– –
-11,373
Closed -$859K
TGTX icon
6234
PUT
TG Therapeutics
TGTX
$8.5B
– –
-111
Closed -$23K
THM
6235
International Tower Hill Mines
THM
$542M
$0 ﹤0.01%
400
– –
THM
6236
PUT
International Tower Hill Mines
THM
$542M
– –
-4
Closed -$1K
THRM icon
6237
CALL
Gentherm
THRM
$1.4B
– –
-38
Closed -$2K
TIMB icon
6238
TIM SA
TIMB
$10.1B
– –
-329
Closed -$2.89K
TIMB icon
6239
PUT
TIM SA
TIMB
$10.1B
– –
-41
Closed -$1K
TITN icon
6240
PUT
Titan Machinery
TITN
$442M
– –
-11
Closed -$4K
TLK icon
6241
PUT
Telkom Indonesia
TLK
$14.2B
– –
-44
Closed -$5K
TLPH icon
6242
Talphera
TLPH
$71.1M
– –
-268
Closed -$18.6K
TMHC icon
6243
Taylor Morrison
TMHC
$6.67B
– –
-718
Closed -$11K
TNA icon
6244
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.35B
– –
-112,504
Closed -$3.57M
TNDM icon
6245
Tandem Diabetes Care
TNDM
$1.16B
– –
-102
Closed -$12K
TNK icon
6246
CALL
Teekay Tankers
TNK
$2.62B
– –
-9
Closed -$11K
TNL icon
6247
Travel + Leisure Co
TNL
$4.5B
– –
-7,265
Closed -$230K
TNXP icon
6248
CALL
Tonix Pharmaceuticals
TNXP
$169M
– –
0
– -$4K
TOL icon
6249
Toll Brothers
TOL
$13.7B
– –
-18,427
Closed -$515K
TOUR
6250
Tuniu
TOUR
$55.9M
– –
-96
Closed -$11.3K
248 249
250
251 252

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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.