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 | |
|---|---|---|---|---|---|---|
|
COUP
176
PUT
DELISTED
Coupa Software Incorporated
COUP
| $32.3M | 0.07% |
2,206
+1,025
| +87% | +$146K |
|
177
PUT
Chevron
CVX
$382B
| $32.2M | 0.07% |
2,676
-1,025
| -28% | -$121K |
|
|
SHNY
178
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $32.2M | 0.07% |
9,905
-2,354
| -19% | -$7.66M |
|
179
PUT
Humana
HUM
$48B
| $32.1M | 0.07% |
876
+322
| +58% | +$102K |
|
180
PUT
Lowe's Companies
LOW
$114B
| $32.1M | 0.07% |
2,679
+720
| +37% | +$82.3K |
|
181
CALL
iShares Silver Trust
SLV
$29.1B
| $32M | 0.07% |
19,200
-453
| -2% | -$7.34K |
|
182
CALL
Western Digital
WDC
$194B
| $32M | 0.07% |
6,664
+589
| +10% | +$24.6K |
|
183
CALL
Procter & Gamble
PG
$350B
| $31.9M | 0.07% |
2,558
+786
| +44% | +$96.2K |
|
184
PUT
TransDigm Group
TDG
$66.8B
| $31M | 0.07% |
554
+242
| +78% | +$132K |
|
185
PUT
Wynn Resorts
WYNN
$9.82B
| $31M | 0.07% |
2,234
+265
| +13% | +$32.2K |
|
186
CALL
3M
MMM
$89.9B
| $30.9M | 0.07% |
2,098
+101
| +5% | +$14.1K |
|
187
CALL
JD.com
JD
$40.9B
| $30.8M | 0.07% |
8,756
-63
| -0.7% | -$2.03K |
|
188
CALL
Expedia Group
EXPE
$31.8B
| $30.8M | 0.07% |
2,848
+1,940
| +214% | +$228K |
|
189
CALL
Oracle
ORCL
$362B
| $30.7M | 0.07% |
5,795
+2,024
| +54% | +$111K |
|
|
190
PUT
Expedia Group
EXPE
$31.8B
| $30.6M | 0.07% |
2,826
+1,651
| +141% | +$194K |
|
|
ATVI
191
PUT
DELISTED
Activision Blizzard
ATVI
| $30.4M | 0.07% |
5,117
-397
| -7% | -$22K |
|
192
PUT
Blackstone
BX
$150B
| $30M | 0.07% |
5,361
+2,696
| +101% | +$140K |
|
193
PUT
Eli Lilly
LLY
$1.04T
| $29.7M | 0.06% |
2,257
+1,843
| +445% | +$214K |
|
|
SPLK
194
CALL
DELISTED
Splunk Inc
SPLK
| $29.6M | 0.06% |
1,976
+1,093
| +124% | +$143K |
|
195
Invesco QQQ Trust
QQQ
$471B
| $29.6M | 0.06% |
+139,094
| New | +$27.8M |
|
|
UCD
196
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $29.5M | 0.06% |
10,776
+116
| +1% | +$318K |
|
197
PUT
Honeywell
HON
$74.2B
| $29.5M | 0.06% |
1,880
+457
| +32% | +$74.7K |
|
198
PUT
AB InBev
BUD
$160B
| $29.3M | 0.06% |
3,570
-866
| -20% | -$72.1K |
|
199
NVIDIA
NVDA
$5.17T
| $29.2M | 0.06% |
4,964,040
-2,438,000
| -33% | -$12.7M |
|
200
PUT
Whirlpool
WHR
$2.4B
| $29.2M | 0.06% |
1,976
+1,311
| +197% | +$198K |
|
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.