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 | |
|---|---|---|---|---|---|---|
476
CALL
Paychex
PAYX
$39.4B
| $9.69M | 0.02% |
1,139
+461
| +68% | +$38.9K |
|
477
CALL
Freeport-McMoran
FCX
$93.4B
| $9.66M | 0.02% |
7,362
+5,556
| +308% | +$61K |
|
478
CALL
Carvana
CVNA
$44.9B
| $9.62M | 0.02% |
5,225
+120
| +2% | +$2.01K |
|
479
PUT
eBay
EBAY
$49.3B
| $9.56M | 0.02% |
2,647
+152
| +6% | +$5.51K |
|
480
CALL
DuPont de Nemours
DD
$18.9B
| $9.52M | 0.02% |
1,395
+544
| +64% | +$45.2K |
|
481
CALL
Newmont
NEM
$102B
| $9.48M | 0.02% |
2,183
-2,236
| -51% | -$87.4K |
|
|
AGN
482
CALL
DELISTED
Allergan plc
AGN
| $9.48M | 0.02% |
496
-1,066
| -68% | -$192K |
|
483
CALL
Eaton
ETN
$158B
| $9.47M | 0.02% |
1,000
+129
| +15% | +$11.5K |
|
484
PUT
Vulcan Materials
VMC
$36B
| $9.45M | 0.02% |
656
+170
| +35% | +$24.3K |
|
485
IBM
IBM
$193B
| $9.44M | 0.02% |
73,692
+60,042
| +440% | +$7.8M |
|
486
PUT
BP
BP
$112B
| $9.39M | 0.02% |
2,488
-548
| -18% | -$20.8K |
|
|
PPL
487
CALL
PPL Corp
PPL
$27.2B
| $9.37M | 0.02% |
2,611
+1,640
| +169% | +$55K |
|
488
CALL
T-Mobile US
TMUS
$207B
| $9.36M | 0.02% |
1,194
+677
| +131% | +$53.3K |
|
489
PUT
CF Industries
CF
$19.6B
| $9.36M | 0.02% |
1,961
+458
| +30% | +$21.4K |
|
490
Micron Technology
MU
$1.08T
| $9.36M | 0.02% |
+173,975
| New | +$8.31M |
|
|
MDCO
491
CALL
DELISTED
Medicines Co
MDCO
| $9.28M | 0.02% |
1,093
-1,177
| -52% | -$78.5K |
|
492
CALL
D.R. Horton
DHI
$40.4B
| $9.26M | 0.02% |
1,756
+396
| +29% | +$21.1K |
|
493
CALL
Truist Financial
TFC
$63.2B
| $9.25M | 0.02% |
1,643
+429
| +35% | +$23.2K |
|
|
AMRN
494
PUT
Amarin Corp
AMRN
$287M
| $9.24M | 0.02% |
216
-7
| -3% | -$2.66K |
|
495
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $9.24M | 0.02% |
3,118
-2,042
| -40% | -$46.8K |
|
|
COUP
496
CALL
DELISTED
Coupa Software Incorporated
COUP
| $9.2M | 0.02% |
629
-370
| -37% | -$52.8K |
|
497
CALL
AB InBev
BUD
$161B
| $9.2M | 0.02% |
1,121
-1
| -0.1% | -$83 |
|
498
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $9.2M | 0.02% |
245
-366
| -60% | -$132K |
|
499
CALL
NextEra Energy
NEE
$186B
| $9.18M | 0.02% |
1,516
-1,732
| -53% | -$101K |
|
|
TIF
500
CALL
DELISTED
Tiffany & Co.
TIF
| $9.13M | 0.02% |
683
+144
| +27% | +$17K |
|
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.