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 | |
|---|---|---|---|---|---|---|
676
CALL
Devon Energy
DVN
$52.5B
| $6.14M | 0.01% |
2,365
+1,752
| +286% | +$39.4K |
|
|
ABMD
677
PUT
DELISTED
Abiomed Inc
ABMD
| $6.14M | 0.01% |
360
+10
| +3% | +$1.85K |
|
678
CALL
International Flavors & Fragrances
IFF
$18.6B
| $6.12M | 0.01% |
474
+339
| +251% | +$43.3K |
|
679
CALL
Nutanix
NTNX
$14.2B
| $6.11M | 0.01% |
1,955
+943
| +93% | +$27.8K |
|
680
PUT
GSK
GSK
$101B
| $6.09M | 0.01% |
1,037
-374
| -27% | -$20.8K |
|
681
Las Vegas Sands
LVS
$30.3B
| $6.09M | 0.01% |
+88,198
| New | +$5.5M |
|
682
CALL
eHealth
EHTH
$43.2M
| $6.07M | 0.01% |
632
+508
| +410% | +$39.4K |
|
683
CALL
Johnson Controls International
JCI
$87.6B
| $6.05M | 0.01% |
1,486
-777
| -34% | -$32.8K |
|
684
Blackstone
BX
$150B
| $6.04M | 0.01% |
+108,015
| New | +$5.6M |
|
|
UN
685
PUT
DELISTED
Unilever NV New York Registry Shares
UN
| $6.04M | 0.01% |
1,051
+489
| +87% | +$28.9K |
|
686
PUT
Veeva Systems
VEEV
$29.2B
| $6.03M | 0.01% |
429
-81
| -16% | -$11.9K |
|
687
PUT
Ciena
CIEN
$57.4B
| $6.03M | 0.01% |
1,413
+1,100
| +351% | +$41.9K |
|
688
CALL
Enterprise Products Partners
EPD
$84.2B
| $5.98M | 0.01% |
2,123
+888
| +72% | +$24.1K |
|
|
WWE
689
CALL
DELISTED
World Wrestling Entertainment
WWE
| $5.96M | 0.01% |
919
-64
| -7% | -$4.05K |
|
690
PUT
BHP
BHP
$213B
| $5.95M | 0.01% |
1,219
+245
| +25% | +$11.1K |
|
691
PUT
Marvell Technology
MRVL
$185B
| $5.93M | 0.01% |
2,233
+1,121
| +101% | +$28.4K |
|
692
FedEx
FDX
$74.4B
| $5.93M | 0.01% |
39,210
-54,320
| -58% | -$8.37M |
|
693
CALL
Teekay Tankers
TNK
$2.62B
| $5.93M | 0.01% |
2,473
+2,472
| +247,200% | +$45K |
|
694
PUT
APA Corp
APA
$13B
| $5.92M | 0.01% |
2,312
+1,371
| +146% | +$31K |
|
695
PUT
Carnival Corporation Ltd
CCL
$34.8B
| $5.89M | 0.01% |
1,158
+666
| +135% | +$29.8K |
|
696
PUT
Cencora
COR
$59B
| $5.87M | 0.01% |
691
-122
| -15% | -$10.5K |
|
|
K
697
CALL
DELISTED
Kellanova
K
| $5.87M | 0.01% |
904
+387
| +75% | +$23.4K |
|
698
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $5.86M | 0.01% |
1,979
+519
| +36% | +$11.9K |
|
699
PUT
New Oriental
EDU
$7.82B
| $5.86M | 0.01% |
483
+68
| +16% | +$8.13K |
|
700
CALL
Agnico Eagle Mines
AEM
$71.7B
| $5.84M | 0.01% |
948
-119
| -11% | -$6.91K |
|
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.