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
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
PUT
Skyworks Solutions
SWKS
$9.44B
| $25.8M | 0.06% |
2,138
+763
| +55% | +$75K |
|
227
CALL
United Airlines
UAL
$38.1B
| $25.7M | 0.06% |
2,918
-412
| -12% | -$37K |
|
228
CALL
United Parcel Service
UPS
$99B
| $25.7M | 0.06% |
2,193
-904
| -29% | -$107K |
|
229
CALL
Wells Fargo
WFC
$262B
| $25.7M | 0.06% |
4,769
-1,465
| -24% | -$76.7K |
|
230
PUT
JD.com
JD
$40.8B
| $25.6M | 0.06% |
7,260
+751
| +12% | +$24.2K |
|
231
CALL
Comcast
CMCSA
$84.8B
| $25.3M | 0.06% |
5,627
+2,285
| +68% | +$102K |
|
232
PUT
3M
MMM
$89.2B
| $25.3M | 0.06% |
1,715
-355
| -17% | -$49.7K |
|
233
PUT
Align Technology
ALGN
$12.5B
| $25.3M | 0.06% |
905
-468
| -34% | -$117K |
|
234
PUT
American Tower
AMT
$77.3B
| $25.2M | 0.06% |
1,098
+63
| +6% | +$13.7K |
|
235
CALL
PepsiCo
PEP
$185B
| $25.2M | 0.06% |
1,843
+466
| +34% | +$63.4K |
|
236
PUT
Deere & Co
DE
$164B
| $25.1M | 0.05% |
1,447
-180
| -11% | -$31K |
|
237
CALL
Uber
UBER
$144B
| $25M | 0.05% |
8,411
+5,304
| +171% | +$157K |
|
238
CALL
Snap
SNAP
$7.65B
| $24.9M | 0.05% |
15,279
+5,683
| +59% | +$83.6K |
|
|
SHNY
239
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $24.7M | 0.05% |
7,414
+784
| +12% | +$2.62M |
|
240
CALL
Eli Lilly
LLY
$1.04T
| $23.8M | 0.05% |
1,811
+407
| +29% | +$47.2K |
|
241
PUT
Morgan Stanley
MS
$343B
| $23.8M | 0.05% |
4,652
+311
| +7% | +$14.7K |
|
242
CALL
Las Vegas Sands
LVS
$30.6B
| $23.6M | 0.05% |
3,423
-1,416
| -29% | -$88.4K |
|
243
PUT
Altria Group
MO
$122B
| $23.5M | 0.05% |
4,716
-1,436
| -23% | -$67.7K |
|
244
PUT
Intuit
INTU
$78.4B
| $23.5M | 0.05% |
897
+651
| +265% | +$170K |
|
245
CALL
General Motors
GM
$74.6B
| $23.4M | 0.05% |
6,394
+268
| +4% | +$9.74K |
|
246
PUT
Northrop Grumman
NOC
$75.4B
| $23.3M | 0.05% |
677
-796
| -54% | -$280K |
|
|
XYZ
247
PUT
Block Inc
XYZ
$46.2B
| $23.1M | 0.05% |
3,688
-6,064
| -62% | -$387K |
|
248
AbbVie
ABBV
$450B
| $23M | 0.05% |
+259,224
| New | +$21.5M |
|
249
CALL
General Dynamics
GD
$101B
| $22.7M | 0.05% |
1,287
-61
| -5% | -$11K |
|
|
ATVI
250
CALL
DELISTED
Activision Blizzard
ATVI
| $22.7M | 0.05% |
3,813
-208
| -5% | -$11.5K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.