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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1176
PUT
Axalta
AXTA
$6.78B
| $1.93M | 0.01% |
638
+183
| +40% | +$5.74K |
|
1177
PUT
Incyte
INCY
$23.3B
| $1.93M | 0.01% |
288
-627
| -69% | -$42.9K |
|
|
MNK
1178
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.93M | 0.01% |
1,033
-858
| -45% | -$13.7K |
|
1179
CALL
State Street
STT
$50.6B
| $1.93M | 0.01% |
207
-307
| -60% | -$30.4K |
|
1180
CALL
Omnicom Group
OMC
$22.2B
| $1.92M | 0.01% |
252
+215
| +581% | +$15.9K |
|
1181
CALL
Plains All American Pipeline
PAA
$17.4B
| $1.92M | 0.01% |
812
+468
| +136% | +$11.3K |
|
|
GRUB
1182
CALL
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $1.92M | 0.01% |
92
+42
| +84% | +$8.7K |
|
|
HDP
1183
CALL
DELISTED
Hortonworks, Inc.
HDP
| $1.92M | 0.01% |
1,052
+815
| +344% | +$14.7K |
|
1184
PUT
Omega Healthcare
OHI
$15.2B
| $1.92M | 0.01% |
618
+369
| +148% | +$10.5K |
|
1185
PUT
Deutsche Bank
DB
$65.3B
| $1.91M | 0.01% |
1,803
-87
| -5% | -$1.11K |
|
1186
CALL
Tyson Foods
TSN
$20B
| $1.91M | 0.01% |
277
-3
| -1% | -$209 |
|
1187
CALL
Cintas
CTAS
$81.3B
| $1.91M | 0.01% |
412
+180
| +78% | +$8.1K |
|
|
GOOS
1188
PUT
Canada Goose Holdings
GOOS
$896M
| $1.91M | 0.01% |
324
+278
| +604% | +$11.7K |
|
1189
PUT
NOV
NOV
$7.22B
| $1.91M | 0.01% |
439
+107
| +32% | +$4.33K |
|
1190
CALL
Shake Shack
SHAK
$2.26B
| $1.91M | 0.01% |
288
+207
| +256% | +$11.5K |
|
1191
PUT
Westlake Corp
WLK
$9.64B
| $1.91M | 0.01% |
177
+14
| +9% | +$1.57K |
|
1192
PUT
Thor Industries
THO
$3.9B
| $1.9M | 0.01% |
195
-117
| -38% | -$11.9K |
|
1193
Vicor
VICR
$10.5B
| $1.9M | 0.01% |
43,628
+38,941
| +831% | +$1.51M |
|
1194
CALL
McCormick & Company Non-Voting
MKC
$13.5B
| $1.89M | 0.01% |
326
+130
| +66% | +$6.83K |
|
|
CGC
1195
CALL
Canopy Growth
CGC
$382M
| $1.89M | 0.01% |
+64
| New | +$19.4K |
|
1196
CALL
Newmont
NEM
$101B
| $1.89M | 0.01% |
500
-1,409
| -74% | -$55.4K |
|
1197
Illumina
ILMN
$29.8B
| $1.88M | 0.01% |
6,934
-4,234
| -38% | -$1.08M |
|
1198
MetLife
MET
$59.5B
| $1.88M | 0.01% |
43,192
-147,762
| -77% | -$6.89M |
|
|
1199
PUT
Tyson Foods
TSN
$20B
| $1.88M | 0.01% |
273
+184
| +207% | +$12.8K |
|
1200
CALL
Broadridge
BR
$16.7B
| $1.88M | 0.01% |
163
+153
| +1,530% | +$17.3K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.