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 | |
|---|---|---|---|---|---|---|
1426
CALL
First Majestic Silver
AG
$8.05B
| $2.13M | ﹤0.01% |
1,738
-565
| -25% | -$5.94K |
|
1427
CALL
Apollo Global Management
APO
$70.7B
| $2.12M | ﹤0.01% |
445
-869
| -66% | -$37.1K |
|
1428
ProShares Ultra QQQ
QLD
$12.5B
| $2.12M | ﹤0.01% |
+138,880
| New | +$1.88M |
|
1429
CALL
Wheaton Precious Metals
WPM
$50.6B
| $2.12M | ﹤0.01% |
711
-1,483
| -68% | -$40.5K |
|
1430
CALL
TripAdvisor
TRIP
$1.59B
| $2.11M | ﹤0.01% |
695
-89
| -11% | -$3K |
|
1431
Fastenal
FAST
$54B
| $2.11M | ﹤0.01% |
114,196
+35,646
| +45% | +$637K |
|
1432
PUT
Entegris
ENTG
$19.7B
| $2.11M | ﹤0.01% |
421
+397
| +1,654% | +$19.1K |
|
1433
Dell
DELL
$283B
| $2.1M | ﹤0.01% |
+80,844
| New | +$2.1M |
|
|
RETA
1434
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $2.1M | ﹤0.01% |
103
-54
| -34% | -$9.85K |
|
1435
Progressive
PGR
$124B
| $2.1M | ﹤0.01% |
+29,075
| New | +$2.1M |
|
1436
CALL
PTC Therapeutics
PTCT
$6.37B
| $2.1M | ﹤0.01% |
438
-365
| -45% | -$15.5K |
|
1437
PUT
Tenet Healthcare
THC
$20.1B
| $2.1M | ﹤0.01% |
553
-291
| -34% | -$8.72K |
|
1438
PUT
Thor Industries
THO
$3.99B
| $2.1M | ﹤0.01% |
283
+143
| +102% | +$9.22K |
|
|
PPL
1439
PUT
PPL Corp
PPL
$27.3B
| $2.1M | ﹤0.01% |
585
+7
| +1% | +$235 |
|
|
ETFC
1440
DELISTED
E*Trade Financial Corporation
ETFC
| $2.1M | ﹤0.01% |
+46,228
| New | +$1.97M |
|
1441
Emerson Electric
EMR
$82.9B
| $2.1M | ﹤0.01% |
+27,480
| New | +$1.98M |
|
|
IMMU
1442
PUT
DELISTED
Immunomedics Inc
IMMU
| $2.09M | ﹤0.01% |
989
+653
| +194% | +$11.5K |
|
|
IPFF
1443
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $2.09M | ﹤0.01% |
447
-734
| -62% | -$11K |
|
1444
Centene
CNC
$31.3B
| $2.09M | ﹤0.01% |
+33,214
| New | +$1.8M |
|
|
SFIX
1445
PUT
Stitch Fix
SFIX
$478M
| $2.09M | ﹤0.01% |
814
-1,000
| -55% | -$23.2K |
|
|
PTLA
1446
CALL
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $2.08M | ﹤0.01% |
873
+592
| +211% | +$16.3K |
|
1447
Pinterest
PINS
$12.4B
| $2.08M | ﹤0.01% |
111,493
+110,257
| +8,920% | +$2.38M |
|
1448
PUT
British American Tobacco
BTI
$132B
| $2.07M | ﹤0.01% |
488
-32
| -6% | -$1.21K |
|
1449
Canadian Solar
CSIQ
$906M
| $2.07M | ﹤0.01% |
93,667
+25,638
| +38% | +$464K |
|
1450
Kohl's
KSS
$2.03B
| $2.07M | ﹤0.01% |
40,584
+16,161
| +66% | +$822K |
|
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.