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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
CALL
Morgan Stanley
MS
$343B
| $21.5M | 0.06% |
5,089
-956
| -16% | -$40.2K |
|
|
ATVI
202
CALL
DELISTED
Activision Blizzard
ATVI
| $21.5M | 0.06% |
4,716
-935
| -17% | -$42.3K |
|
|
VMW
203
PUT
DELISTED
VMware, Inc
VMW
| $21.4M | 0.06% |
1,186
+66
| +6% | +$10.8K |
|
|
SHNY
204
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $21.4M | 0.06% |
9,542
+2,603
| +38% | +$5.84M |
|
205
CALL
eBay
EBAY
$49.3B
| $21.4M | 0.06% |
5,753
+3,487
| +154% | +$121K |
|
206
CALL
Applied Materials
AMAT
$440B
| $21.3M | 0.06% |
5,370
-292
| -5% | -$11.1K |
|
207
CALL
Expedia Group
EXPE
$31.3B
| $21.2M | 0.06% |
1,784
+468
| +36% | +$56.8K |
|
208
PUT
Blackrock
BLK
$164B
| $21.2M | 0.06% |
495
-392
| -44% | -$164K |
|
209
PUT
United Rentals
URI
$64.8B
| $21M | 0.06% |
1,840
+534
| +41% | +$65.9K |
|
|
RHT
210
PUT
DELISTED
Red Hat Inc
RHT
| $20.8M | 0.06% |
1,140
-959
| -46% | -$172K |
|
211
PUT
Medtronic
MDT
$105B
| $20.4M | 0.06% |
2,239
+1,213
| +118% | +$109K |
|
|
212
CALL
Baidu
BIDU
$36.6B
| $20.4M | 0.06% |
1,236
-985
| -44% | -$165K |
|
213
PUT
Wayfair
W
$11.1B
| $20.1M | 0.06% |
1,355
-499
| -27% | -$65.1K |
|
|
214
PUT
Morgan Stanley
MS
$343B
| $20M | 0.06% |
4,750
+728
| +18% | +$30.6K |
|
215
PUT
Align Technology
ALGN
$12.4B
| $20M | 0.06% |
704
+50
| +8% | +$11.9K |
|
|
UWC
216
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $19.8M | 0.06% |
3,187
+632
| +25% | +$3.92M |
|
|
CGC
217
CALL
Canopy Growth
CGC
$384M
| $19.8M | 0.05% |
455
+136
| +43% | +$59.6K |
|
218
CALL
NextEra Energy
NEE
$186B
| $19.7M | 0.05% |
4,072
+2,388
| +142% | +$109K |
|
219
CALL
Las Vegas Sands
LVS
$30B
| $19.7M | 0.05% |
3,227
-649
| -17% | -$38.2K |
|
220
PUT
Walmart Inc
WMT
$870B
| $19.6M | 0.05% |
6,030
-6,105
| -50% | -$198K |
|
221
CALL
Kraft Heinz
KHC
$30.8B
| $19.5M | 0.05% |
5,975
+3,177
| +114% | +$129K |
|
|
RDS.A
222
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $19.4M | 0.05% |
3,081
-414
| -12% | -$25.6K |
|
223
CALL
Spotify
SPOT
$97.5B
| $19.3M | 0.05% |
1,394
+24
| +2% | +$3.28K |
|
224
PUT
American Airlines Group
AAL
$9.78B
| $19.3M | 0.05% |
6,064
+2,802
| +86% | +$94.1K |
|
225
PUT
Crown Castle
CCI
$33.8B
| $19.3M | 0.05% |
1,504
+1,222
| +433% | +$143K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.