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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
951
CALL
Elastic
ESTC
$5.96B
| $3.17M | 0.01% |
569
+273
| +92% | +$17.6K |
|
952
CALL
Pinterest
PINS
$12.3B
| $3.17M | 0.01% |
2,055
+1,417
| +222% | +$27.6K |
|
953
CALL
Scorpio Tankers
STNG
$3.95B
| $3.17M | 0.01% |
+1,659
| New | +$39.4K |
|
954
CALL
O'Reilly Automotive
ORLY
$71.4B
| $3.16M | 0.01% |
1,575
-1,080
| -41% | -$27.6K |
|
|
APRN
955
PUT
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $3.16M | 0.01% |
219
+183
| +508% | +$11.7K |
|
956
PUT
DexCom
DXCM
$27.2B
| $3.15M | 0.01% |
468
-1,424
| -75% | -$88.6K |
|
|
IRBT
957
PUT
DELISTED
iRobot
IRBT
| $3.15M | 0.01% |
770
+197
| +34% | +$9.45K |
|
|
CHL
958
PUT
DELISTED
China Mobile Limited
CHL
| $3.15M | 0.01% |
836
-177
| -17% | -$7.12K |
|
959
PUT
Hartford Financial Services
HIG
$39B
| $3.14M | 0.01% |
892
+870
| +3,955% | +$45.3K |
|
960
PUT
Hyatt Hotels
H
$17.3B
| $3.14M | 0.01% |
655
+632
| +2,748% | +$47.8K |
|
961
PUT
National Healthcare
NHC
$3.46B
| $3.13M | 0.01% |
437
-165
| -27% | -$13.1K |
|
|
STMP
962
CALL
DELISTED
Stamps.com, Inc.
STMP
| $3.13M | 0.01% |
241
-381
| -61% | -$39.9K |
|
963
PUT
Alpha Pro Tech
APT
$50.2M
| $3.13M | 0.01% |
+2,593
| New | +$21.7K |
|
964
CALL
Willis Towers Watson
WTW
$27.2B
| $3.13M | 0.01% |
+184
| New | +$36.2K |
|
965
PUT
Nexstar Media Group
NXST
$5.53B
| $3.12M | 0.01% |
540
-68
| -11% | -$7.19K |
|
966
PUT
Cheesecake Factory
CAKE
$4.2B
| $3.11M | 0.01% |
1,821
+1,525
| +515% | +$51.4K |
|
|
NTUS
967
DELISTED
Natus Medical Inc
NTUS
| $3.11M | 0.01% |
134,403
+131,844
| +5,152% | +$3.83M |
|
968
CALL
Chewy
CHWY
$8.38B
| $3.11M | 0.01% |
829
-590
| -42% | -$17.3K |
|
969
Applied Materials
AMAT
$447B
| $3.11M | 0.01% |
67,789
-18,721
| -22% | -$1.08M |
|
970
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $3.1M | 0.01% |
25,728
+25,480
| +10,274% | +$3.16M |
|
971
PUT
Ambarella
AMBA
$3.09B
| $3.09M | 0.01% |
637
-397
| -38% | -$22.8K |
|
972
CALL
Capital One
COF
$123B
| $3.09M | 0.01% |
613
-427
| -41% | -$37.5K |
|
973
RTX Corp
RTX
$282B
| $3.09M | 0.01% |
52,049
-66,541
| -56% | -$5.63M |
|
|
BHVN
974
CALL
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $3.09M | 0.01% |
908
+604
| +199% | +$27.6K |
|
975
Macy's
M
$6.14B
| $3.09M | 0.01% |
+628,950
| New | +$8.53M |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.