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 | |
|---|---|---|---|---|---|---|
1351
PUT
Generac Holdings
GNRC
$12.4B
| $1.82M | ﹤0.01% |
195
+124
| +175% | +$12.8K |
|
|
IRBT
1352
CALL
DELISTED
iRobot
IRBT
| $1.81M | ﹤0.01% |
444
-559
| -56% | -$26.8K |
|
1353
PUT
Flex
FLEX
$46.9B
| $1.81M | ﹤0.01% |
2,874
+816
| +40% | +$7.06K |
|
1354
PUT
HF Sinclair
DINO
$16.1B
| $1.81M | ﹤0.01% |
739
+628
| +566% | +$23.5K |
|
|
KYNB
1355
PUT
Kyntra Bio
KYNB
$28.6M
| $1.81M | ﹤0.01% |
21
-21
| -50% | -$20.9K |
|
1356
PUT
Simon Property Group
SPG
$73B
| $1.81M | ﹤0.01% |
330
-206
| -38% | -$24.6K |
|
1357
Johnson & Johnson
JNJ
$624B
| $1.81M | ﹤0.01% |
13,794
-44,131
| -76% | -$6.26M |
|
|
BKI
1358
CALL
DELISTED
Black Knight, Inc. Common Stock
BKI
| $1.8M | ﹤0.01% |
311
-304
| -49% | -$19.9K |
|
1359
Freeport-McMoran
FCX
$91.3B
| $1.79M | ﹤0.01% |
+266,067
| New | +$2.78M |
|
|
DFS
1360
PUT
DELISTED
Discover Financial Services
DFS
| $1.79M | ﹤0.01% |
502
+105
| +26% | +$6.96K |
|
1361
CALL
ArcelorMittal
MT
$49.9B
| $1.79M | ﹤0.01% |
1,919
+703
| +58% | +$9.85K |
|
1362
PUT
National Health Investors
NHI
$3.88B
| $1.79M | ﹤0.01% |
361
-100
| -22% | -$7.59K |
|
1363
CALL
DaVita
DVA
$15B
| $1.78M | ﹤0.01% |
234
-99
| -30% | -$7.78K |
|
1364
CALL
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.6M
| $1.78M | ﹤0.01% |
290
+268
| +1,218% | +$17.6K |
|
1365
CALL
National Beverage
FIZZ
$2.86B
| $1.78M | ﹤0.01% |
834
+388
| +87% | +$8.48K |
|
1366
Twilio
TWLO
$28.1B
| $1.77M | ﹤0.01% |
+19,820
| New | +$2.18M |
|
1367
PUT
Wendy's
WEN
$1.37B
| $1.77M | ﹤0.01% |
1,192
+1,053
| +758% | +$20.7K |
|
1368
PUT
Liberty Global Class C
LBTYK
$3.37B
| $1.77M | ﹤0.01% |
1,084
-507
| -32% | -$9.53K |
|
1369
PUT
M&T Bank
MTB
$35.6B
| $1.77M | ﹤0.01% |
171
+100
| +141% | +$14.7K |
|
|
SWAV
1370
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $1.77M | ﹤0.01% |
533
+522
| +4,745% | +$20.7K |
|
1371
PUT
Marriott Vacations Worldwide
VAC
$3.22B
| $1.77M | ﹤0.01% |
+318
| New | +$33K |
|
1372
CALL
Phillips 66
PSX
$83B
| $1.76M | ﹤0.01% |
329
+29
| +10% | +$2.36K |
|
1373
PUT
Markel Group
MKL
$24.5B
| $1.76M | ﹤0.01% |
+19
| New | +$21.7K |
|
1374
Gaotu Techedu
GOTU
$382M
| $1.76M | ﹤0.01% |
41,537
+34,515
| +492% | +$1.27M |
|
1375
CALL
Park Hotels & Resorts
PK
$2.94B
| $1.75M | ﹤0.01% |
2,219
+2,116
| +2,054% | +$39.8K |
|
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.