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 | |
|---|---|---|---|---|---|---|
851
CALL
argenx
ARGX
$57.1B
| $3.78M | 0.01% |
287
+199
| +226% | +$29.1K |
|
|
APRN
852
CALL
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $3.77M | 0.01% |
261
+220
| +537% | +$14K |
|
853
CALL
Spotify
SPOT
$96.7B
| $3.76M | 0.01% |
310
-508
| -62% | -$71.9K |
|
|
AMED
854
CALL
DELISTED
Amedisys
AMED
| $3.76M | 0.01% |
205
+197
| +2,463% | +$35K |
|
855
PUT
Teradata
TDC
$2.58B
| $3.76M | 0.01% |
1,836
+1,293
| +238% | +$29.8K |
|
856
PUT
Cboe Global Markets
CBOE
$30B
| $3.76M | 0.01% |
421
+109
| +35% | +$12.2K |
|
857
PUT
Edwards Lifesciences
EW
$48B
| $3.75M | 0.01% |
597
+174
| +41% | +$12.5K |
|
|
SGEN
858
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $3.75M | 0.01% |
325
-242
| -43% | -$26.8K |
|
859
Zoom
ZM
$24.5B
| $3.74M | 0.01% |
25,625
+4,486
| +21% | +$443K |
|
|
NTUS
860
PUT
DELISTED
Natus Medical Inc
NTUS
| $3.74M | 0.01% |
1,617
+1,612
| +32,240% | +$46.9K |
|
861
PUT
Datadog
DDOG
$87B
| $3.73M | 0.01% |
1,036
+812
| +363% | +$33.5K |
|
|
UN
862
CALL
DELISTED
Unilever NV New York Registry Shares
UN
| $3.73M | 0.01% |
764
+592
| +344% | +$32.4K |
|
863
PUT
Hershey
HSY
$34.8B
| $3.72M | 0.01% |
281
+163
| +138% | +$24K |
|
864
iShares Russell 2000 Growth ETF
IWO
$14.6B
| $3.72M | 0.01% |
23,515
+22,903
| +3,742% | +$4.55M |
|
865
PUT
SolarEdge
SEDG
$2.73B
| $3.72M | 0.01% |
454
-408
| -47% | -$43.1K |
|
866
CALL
Aon
AON
$75.5B
| $3.7M | 0.01% |
224
+118
| +111% | +$24.2K |
|
867
Lamar Advertising Co
LAMR
$16B
| $3.69M | 0.01% |
+71,931
| New | +$5.8M |
|
868
CALL
Enphase Energy
ENPH
$5.07B
| $3.69M | 0.01% |
1,142
-156
| -12% | -$5.88K |
|
869
CALL
Alexandria Real Estate Equities
ARE
$8.64B
| $3.69M | 0.01% |
269
-64
| -19% | -$10K |
|
870
CALL
GDS Holdings
GDS
$6.47B
| $3.69M | 0.01% |
636
-367
| -37% | -$20.5K |
|
871
PUT
Tyler Technologies
TYL
$11.8B
| $3.68M | 0.01% |
124
+49
| +65% | +$15.2K |
|
872
PUT
NIO
NIO
$11.6B
| $3.67M | 0.01% |
13,203
+4,262
| +48% | +$15.9K |
|
873
CALL
Coherent
COHR
$61.3B
| $3.66M | 0.01% |
+1,286
| New | +$41.8K |
|
|
PXD
874
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $3.66M | 0.01% |
522
-581
| -53% | -$69.1K |
|
875
CALL
Bilibili
BILI
$7.27B
| $3.66M | 0.01% |
1,563
+540
| +53% | +$13K |
|
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.