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 | |
|---|---|---|---|---|---|---|
201
CALL
Texas Instruments
TXN
$269B
| $28.9M | 0.06% |
2,255
+267
| +13% | +$33K |
|
|
202
PUT
Texas Instruments
TXN
$269B
| $28.9M | 0.06% |
2,255
+1,247
| +124% | +$154K |
|
203
CALL
Regeneron Pharmaceuticals
REGN
$69.9B
| $28.6M | 0.06% |
762
+126
| +20% | +$42.4K |
|
204
PUT
Workday
WDAY
$33.3B
| $28.5M | 0.06% |
1,733
+70
| +4% | +$11.6K |
|
205
CALL
ExxonMobil
XOM
$636B
| $28.4M | 0.06% |
4,064
-2,429
| -37% | -$168K |
|
206
CALL
ConocoPhillips
COP
$144B
| $28.2M | 0.06% |
4,343
+2,034
| +88% | +$120K |
|
207
PUT
Philip Morris
PM
$302B
| $28.2M | 0.06% |
3,319
-1,423
| -30% | -$117K |
|
208
CALL
Starbucks
SBUX
$119B
| $28.2M | 0.06% |
3,207
-246
| -7% | -$21K |
|
209
PUT
Lockheed Martin
LMT
$119B
| $28.2M | 0.06% |
723
-189
| -21% | -$72.5K |
|
210
PUT
Cisco
CSCO
$445B
| $28.1M | 0.06% |
5,859
+572
| +11% | +$26.6K |
|
211
CALL
American Tower
AMT
$77.3B
| $28.1M | 0.06% |
1,222
+12
| +1% | +$2.61K |
|
|
RAD
212
CALL
DELISTED
Rite Aid Corporation
RAD
| $28M | 0.06% |
18,083
-1,596
| -8% | -$15.6K |
|
213
PUT
Capital One
COF
$124B
| $27.8M | 0.06% |
2,703
+1,125
| +71% | +$108K |
|
214
CALL
RH
RH
$3.33B
| $27.8M | 0.06% |
1,302
+816
| +168% | +$159K |
|
215
CALL
Bank of America
BAC
$433B
| $27.6M | 0.06% |
7,846
-2,519
| -24% | -$81.4K |
|
216
CALL
Lowe's Companies
LOW
$114B
| $27.6M | 0.06% |
2,303
-403
| -15% | -$46.1K |
|
|
AGN
217
PUT
DELISTED
Allergan plc
AGN
| $27.5M | 0.06% |
1,437
+24
| +2% | +$4.33K |
|
218
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.63B
| $27.4M | 0.06% |
47,670
+8,080
| +20% | +$160K |
|
219
PUT
Paycom
PAYC
$6.54B
| $27.3M | 0.06% |
1,031
+876
| +565% | +$207K |
|
220
PUT
Comcast
CMCSA
$85.1B
| $27.1M | 0.06% |
6,031
+3,141
| +109% | +$140K |
|
|
221
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.63B
| $26.8M | 0.06% |
32,440
+4,700
| +17% | +$93.3K |
|
222
CALL
Honeywell
HON
$74.2B
| $26.4M | 0.06% |
1,583
+537
| +51% | +$87.8K |
|
223
CALL
Twilio
TWLO
$27.9B
| $26.3M | 0.06% |
2,680
-138
| -5% | -$14.1K |
|
224
CALL
Beyond Meat
BYND
$310M
| $26.2M | 0.06% |
3,468
-1,804
| -34% | -$167K |
|
225
CALL
American Airlines Group
AAL
$10.1B
| $25.9M | 0.06% |
9,045
+3,948
| +77% | +$113K |
|
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.