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 | |
|---|---|---|---|---|---|---|
576
CALL
HCA Healthcare
HCA
$82.5B
| $7.7M | 0.02% |
521
+385
| +283% | +$51.7K |
|
577
PUT
Campbell Soup
CPB
$6.52B
| $7.67M | 0.02% |
1,552
+890
| +134% | +$42.2K |
|
578
CALL
Domino's
DPZ
$10.6B
| $7.67M | 0.02% |
261
+128
| +96% | +$35.3K |
|
579
CALL
Archer Daniels Midland
ADM
$42.1B
| $7.67M | 0.02% |
1,654
+458
| +38% | +$19.5K |
|
|
NVRO
580
CALL
DELISTED
NEVRO CORP.
NVRO
| $7.65M | 0.02% |
651
+629
| +2,859% | +$62.3K |
|
581
TSMC
TSM
$2.18T
| $7.59M | 0.02% |
+130,703
| New | +$6.93M |
|
582
CALL
Boston Scientific
BSX
$63.9B
| $7.58M | 0.02% |
1,677
+66
| +4% | +$2.76K |
|
583
CALL
Simon Property Group
SPG
$73.4B
| $7.57M | 0.02% |
508
+265
| +109% | +$39.7K |
|
584
PUT
Cintas
CTAS
$80.6B
| $7.53M | 0.02% |
1,120
| – | – |
|
585
CALL
Zillow
Z
$7.18B
| $7.49M | 0.02% |
1,632
-104
| -6% | -$3.87K |
|
|
GRMN
586
CALL
Garmin
GRMN
$46.4B
| $7.48M | 0.02% |
767
+531
| +225% | +$49.5K |
|
|
ANSS
587
PUT
DELISTED
Ansys
ANSS
| $7.46M | 0.02% |
290
-21
| -7% | -$4.97K |
|
588
VanEck Junior Gold Miners ETF
GDXJ
$7.26B
| $7.45M | 0.02% |
176,277
+140,172
| +388% | +$5.35M |
|
589
PUT
McKesson
MCK
$95.3B
| $7.44M | 0.02% |
538
-394
| -42% | -$55.7K |
|
590
Citigroup
C
$222B
| $7.42M | 0.02% |
92,854
+47,014
| +103% | +$3.47M |
|
591
PUT
Petrobras
PBR
$122B
| $7.42M | 0.02% |
4,654
+1,051
| +29% | +$16K |
|
592
Bank of America
BAC
$432B
| $7.34M | 0.02% |
+208,350
| New | +$6.73M |
|
593
Hilton Worldwide
HLT
$73.8B
| $7.32M | 0.02% |
+65,964
| New | +$6.62M |
|
594
PUT
Novartis
NVS
$291B
| $7.29M | 0.02% |
909
-150
| -14% | -$13.5K |
|
595
PUT
MongoDB
MDB
$24.5B
| $7.25M | 0.02% |
551
-1,142
| -67% | -$150K |
|
596
PUT
Mondelez International
MDLZ
$78.1B
| $7.23M | 0.02% |
1,313
+529
| +67% | +$28.3K |
|
597
PUT
Agnico Eagle Mines
AEM
$73.5B
| $7.18M | 0.02% |
1,165
-427
| -27% | -$24.8K |
|
598
PUT
iShares MSCI Global Gold Miners ETF
RING
$2.36B
| $7.16M | 0.02% |
1,324
-1,876
| -59% | -$41.7K |
|
599
PUT
Bread Financial
BFH
$4.12B
| $7.15M | 0.02% |
798
-132
| -14% | -$11.7K |
|
600
PUT
Norfolk Southern
NSC
$74.3B
| $7.14M | 0.02% |
368
-80
| -18% | -$15K |
|
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.