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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2401
CALL
Bloom Energy
BE
$52.6B
| $416K | ﹤0.01% |
417
+302
| +263% | +$5.83K |
|
2402
CALL
Westlake Corp
WLK
$9.46B
| $416K | ﹤0.01% |
63
-8
| -11% | -$578 |
|
|
MIC
2403
PUT
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $416K | ﹤0.01% |
114
-384
| -77% | -$15.4K |
|
|
DNKN
2404
PUT
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $416K | ﹤0.01% |
65
-176
| -73% | -$12.5K |
|
2405
American Eagle Outfitters
AEO
$2.85B
| $415K | ﹤0.01% |
+21,518
| New | +$448K |
|
|
CTLP
2406
PUT
DELISTED
Cantaloupe
CTLP
| $415K | ﹤0.01% |
1,067
+860
| +415% | +$4.51K |
|
2407
Direxion Daily Energy Bull 2X ETF
ERX
$249M
| $415K | ﹤0.01% |
+2,741
| New | +$700K |
|
2408
Etsy
ETSY
$7.65B
| $415K | ﹤0.01% |
8,737
+389
| +5% | +$18.3K |
|
2409
YPF
YPF
$20.2B
| $415K | ﹤0.01% |
+31,009
| New | +$456K |
|
2410
CALL
Hewlett Packard
HPE
$63.2B
| $413K | ﹤0.01% |
363
-306
| -46% | -$4.58K |
|
2411
PUT
NOV
NOV
$7.45B
| $413K | ﹤0.01% |
161
-201
| -56% | -$6.95K |
|
2412
PUT
Banco Santander
SAN
$194B
| $413K | ﹤0.01% |
965
+412
| +75% | +$1.87K |
|
|
PTLA
2413
PUT
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $413K | ﹤0.01% |
212
-41
| -16% | -$843 |
|
|
OAK
2414
CALL
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $413K | ﹤0.01% |
104
+39
| +60% | +$1.6K |
|
2415
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $412K | ﹤0.01% |
56
-3
| -5% | -$224 |
|
2416
Golar LNG
GLNG
$4.95B
| $412K | ﹤0.01% |
18,935
-2,177
| -10% | -$56.3K |
|
2417
CALL
Ingredion
INGR
$6.38B
| $411K | ﹤0.01% |
45
-100
| -69% | -$10K |
|
2418
MGIC Investment
MTG
$6.27B
| $411K | ﹤0.01% |
39,328
+32,632
| +487% | +$382K |
|
|
SPA
2419
DELISTED
Sparton
SPA
| $411K | ﹤0.01% |
22,615
+20,083
| +793% | +$294K |
|
|
USX
2420
PUT
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $409K | ﹤0.01% |
730
+529
| +263% | +$4.44K |
|
2421
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $408K | ﹤0.01% |
462
-89
| -16% | -$858 |
|
2422
Pool Corp
POOL
$6.7B
| $408K | ﹤0.01% |
+2,746
| New | +$411K |
|
|
RAD
2423
CALL
DELISTED
Rite Aid Corporation
RAD
| $408K | ﹤0.01% |
288
+122
| +73% | +$2.57K |
|
2424
CALL
B&G Foods
BGS
$285M
| $407K | ﹤0.01% |
141
+40
| +40% | +$1.14K |
|
2425
Ingersoll Rand
IR
$33B
| $407K | ﹤0.01% |
19,932
+15,101
| +313% | +$371K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.