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 | |
|---|---|---|---|---|---|---|
1451
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $2.07M | ﹤0.01% |
798
-670
| -46% | -$17.9K |
|
|
SGI
1452
Somnigroup International
SGI
$15.1B
| $2.07M | ﹤0.01% |
94,936
+46,112
| +94% | +$964K |
|
|
EB
1453
PUT
DELISTED
Eventbrite
EB
| $2.06M | ﹤0.01% |
1,022
+925
| +954% | +$17.7K |
|
1454
CALL
Vale
VALE
$62.9B
| $2.06M | ﹤0.01% |
1,562
-197
| -11% | -$2.37K |
|
1455
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$162M
| $2.06M | ﹤0.01% |
+2,131
| New | +$2.58M |
|
1456
HSBC
HSBC
$355B
| $2.06M | ﹤0.01% |
+52,705
| New | +$2M |
|
|
CS
1457
CALL
DELISTED
Credit Suisse Group
CS
| $2.06M | ﹤0.01% |
1,528
+59
| +4% | +$754 |
|
|
KSU
1458
PUT
DELISTED
Kansas City Southern
KSU
| $2.05M | ﹤0.01% |
134
+70
| +109% | +$10.3K |
|
1459
CALL
Magna International
MGA
$17.9B
| $2.05M | ﹤0.01% |
374
+275
| +278% | +$14.9K |
|
1460
PUT
Fate Therapeutics
FATE
$281M
| $2.05M | ﹤0.01% |
1,048
+309
| +42% | +$4.91K |
|
1461
PUT
Phillips 66
PSX
$82.9B
| $2.05M | ﹤0.01% |
184
+102
| +124% | +$11.5K |
|
1462
PUT
Fluor
FLR
$7.29B
| $2.05M | ﹤0.01% |
1,085
+295
| +37% | +$5.36K |
|
|
REGI
1463
CALL
DELISTED
Renewable Energy Group, Inc.
REGI
| $2.05M | ﹤0.01% |
+760
| New | +$13.8K |
|
1464
CALL
Alaska Air
ALK
$5.15B
| $2.05M | ﹤0.01% |
302
+68
| +29% | +$4.64K |
|
1465
PPG Industries
PPG
$25.9B
| $2.05M | ﹤0.01% |
+15,334
| New | +$1.94M |
|
1466
PUT
Telecom Argentina
TEO
$5.89B
| $2.04M | ﹤0.01% |
1,798
+223
| +14% | +$2.24K |
|
|
SEM
1467
CALL
DELISTED
Select Medical
SEM
| $2.04M | ﹤0.01% |
1,620
+282
| +21% | +$3.04K |
|
1468
PUT
Bio-Rad Laboratories Class A
BIO
$8.42B
| $2.04M | ﹤0.01% |
55
-61
| -53% | -$21.5K |
|
1469
PUT
UBS Group
UBS
$170B
| $2.04M | ﹤0.01% |
1,618
-587
| -27% | -$6.98K |
|
1470
PUT
Fox Class B
FOX
$20.7B
| $2.03M | ﹤0.01% |
548
+381
| +228% | +$12.8K |
|
1471
PUT
Hilton Worldwide
HLT
$74B
| $2.03M | ﹤0.01% |
183
+22
| +14% | +$2.21K |
|
1472
CALL
American Eagle Outfitters
AEO
$2.85B
| $2.03M | ﹤0.01% |
1,379
+669
| +94% | +$10.2K |
|
1473
PUT
International Paper
IP
$22.3B
| $2.02M | ﹤0.01% |
464
-217
| -32% | -$9.11K |
|
1474
RH
RH
$3.3B
| $2.02M | ﹤0.01% |
9,452
+4,926
| +109% | +$961K |
|
|
UN
1475
DELISTED
Unilever NV New York Registry Shares
UN
| $2.02M | ﹤0.01% |
35,129
+15,073
| +75% | +$890K |
|
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.