Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
801
PUT
Corning
GLW
$134B
| $4.99M | 0.01% |
1,715
+1,146
| +201% | +$33.3K |
|
802
CALL
Analog Devices
ADI
$185B
| $4.99M | 0.01% |
420
+238
| +131% | +$26.8K |
|
803
CALL
Tilray
TLRY
$493M
| $4.99M | 0.01% |
291
-110
| -27% | -$22.8K |
|
804
PUT
Emerson Electric
EMR
$81.2B
| $4.99M | 0.01% |
654
+274
| +72% | +$19.7K |
|
805
PUT
Vornado Realty Trust
VNO
$7.34B
| $4.99M | 0.01% |
750
+290
| +63% | +$18.8K |
|
806
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $4.98M | 0.01% |
1,220
-1,113
| -48% | -$38.6K |
|
807
CALL
Agilent Technologies
A
$39.5B
| $4.95M | 0.01% |
580
+361
| +165% | +$28.4K |
|
808
PUT
WIX.com
WIX
$2.04B
| $4.93M | 0.01% |
403
+31
| +8% | +$3.79K |
|
809
CALL
Royal Bank of Canada
RY
$290B
| $4.93M | 0.01% |
622
+188
| +43% | +$15.1K |
|
810
PUT
Progressive
PGR
$120B
| $4.92M | 0.01% |
680
+342
| +101% | +$24.7K |
|
|
WRK
811
PUT
DELISTED
WestRock Company
WRK
| $4.92M | 0.01% |
1,146
-357
| -24% | -$13.9K |
|
812
PUT
Travelers Companies
TRV
$78.5B
| $4.92M | 0.01% |
359
+39
| +12% | +$5.31K |
|
813
CALL
Kraft Heinz
KHC
$30.1B
| $4.89M | 0.01% |
1,523
-709
| -32% | -$21.5K |
|
814
PUT
Roper Technologies
ROP
$35.8B
| $4.89M | 0.01% |
138
+43
| +45% | +$14.9K |
|
|
815
CALL
WIX.com
WIX
$2.04B
| $4.88M | 0.01% |
399
+17
| +4% | +$2.08K |
|
|
BBL
816
CALL
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $4.88M | 0.01% |
1,038
+804
| +344% | +$35.4K |
|
817
CALL
SAP
SAP
$171B
| $4.88M | 0.01% |
364
+235
| +182% | +$30.9K |
|
818
CALL
Southern Company
SO
$109B
| $4.86M | 0.01% |
763
-282
| -27% | -$17.5K |
|
819
CALL
Diageo
DEO
$45.7B
| $4.85M | 0.01% |
288
-99
| -26% | -$16.1K |
|
820
CALL
Diamondback Energy
FANG
$57.8B
| $4.85M | 0.01% |
522
+193
| +59% | +$16K |
|
821
CALL
Air Products & Chemicals
APD
$65.5B
| $4.84M | 0.01% |
206
+105
| +104% | +$23.7K |
|
822
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $4.84M | 0.01% |
638
+63
| +11% | +$4.89K |
|
|
823
PUT
Diamondback Energy
FANG
$57.8B
| $4.84M | 0.01% |
521
-332
| -39% | -$27.6K |
|
824
PUT
Albemarle
ALB
$13.8B
| $4.83M | 0.01% |
662
+142
| +27% | +$9.48K |
|
|
ALXN
825
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $4.81M | 0.01% |
445
-173
| -28% | -$18.5K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.