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 | |
|---|---|---|---|---|---|---|
751
PUT
NewMarket
NEU
$7.07B
| $4.48M | 0.01% |
117
+2
| +2% | +$844 |
|
752
CALL
First Trust Natural Gas ETF
FCG
$636M
| $4.47M | 0.01% |
371
-11
| -3% | -$91 |
|
753
CALL
Dollar General
DG
$26.5B
| $4.47M | 0.01% |
296
-1,082
| -79% | -$167K |
|
754
PUT
Public Storage
PSA
$54.7B
| $4.47M | 0.01% |
225
-11
| -5% | -$2.36K |
|
755
Amgen
AMGN
$198B
| $4.44M | 0.01% |
21,911
+16,514
| +306% | +$3.61M |
|
756
CALL
HP
HPQ
$23B
| $4.42M | 0.01% |
2,548
-503
| -16% | -$10.2K |
|
|
PARA
757
DELISTED
Paramount Global Class B
PARA
| $4.42M | 0.01% |
315,602
+221,505
| +235% | +$6.35M |
|
758
CALL
Qorvo
QRVO
$7.89B
| $4.42M | 0.01% |
548
+143
| +35% | +$14.3K |
|
759
PUT
Iron Mountain
IRM
$37B
| $4.41M | 0.01% |
1,855
+1,029
| +125% | +$31.1K |
|
760
PUT
Ventas
VTR
$47.2B
| $4.41M | 0.01% |
1,647
-669
| -29% | -$33.2K |
|
761
Spotify
SPOT
$97.5B
| $4.41M | 0.01% |
36,326
+27,785
| +325% | +$3.93M |
|
762
PUT
Tractor Supply
TSCO
$15.4B
| $4.41M | 0.01% |
2,605
+440
| +20% | +$7.89K |
|
763
Pinterest
PINS
$12.6B
| $4.4M | 0.01% |
285,067
+173,574
| +156% | +$3.38M |
|
764
PUT
Best Buy
BBY
$18.4B
| $4.39M | 0.01% |
771
-660
| -46% | -$52.3K |
|
|
STMP
765
PUT
DELISTED
Stamps.com, Inc.
STMP
| $4.38M | 0.01% |
337
-321
| -49% | -$33.6K |
|
766
PUT
Planet Fitness
PLNT
$4.28B
| $4.38M | 0.01% |
899
+567
| +171% | +$39.5K |
|
767
CALL
Halliburton
HAL
$27.6B
| $4.38M | 0.01% |
6,390
+2,885
| +82% | +$50.2K |
|
768
CALL
Progressive
PGR
$119B
| $4.37M | 0.01% |
592
-30
| -5% | -$2.31K |
|
769
CALL
AB InBev
BUD
$160B
| $4.37M | 0.01% |
990
-131
| -12% | -$8.55K |
|
770
PUT
Cardinal Health
CAH
$51.7B
| $4.35M | 0.01% |
908
-139
| -13% | -$7.22K |
|
771
PUT
Zebra Technologies
ZBRA
$12.5B
| $4.35M | 0.01% |
237
-34
| -13% | -$7.64K |
|
772
CALL
Dentsply Sirona
XRAY
$2.66B
| $4.35M | 0.01% |
1,120
+731
| +188% | +$37.2K |
|
773
VanEck Gold Miners ETF
GDX
$23.4B
| $4.32M | 0.01% |
187,624
+76,336
| +69% | +$2.09M |
|
774
CALL
Emerson Electric
EMR
$78.2B
| $4.32M | 0.01% |
906
-176
| -16% | -$11.6K |
|
|
RP
775
PUT
DELISTED
RealPage, Inc.
RP
| $4.31M | 0.01% |
814
+130
| +19% | +$7.41K |
|
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.