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 | |
|---|---|---|---|---|---|---|
851
PUT
W.W. Grainger
GWW
$64.6B
| $4.64M | 0.01% |
137
-58
| -30% | -$18.4K |
|
852
CALL
Kohl's
KSS
$2.06B
| $4.63M | 0.01% |
908
+450
| +98% | +$22.9K |
|
853
NXP Semiconductors
NXPI
$70B
| $4.63M | 0.01% |
+36,351
| New | +$4.22M |
|
854
PUT
Snap
SNAP
$7.42B
| $4.62M | 0.01% |
2,832
-4,463
| -61% | -$65.7K |
|
|
BFYT
855
CALL
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $4.61M | 0.01% |
2,389
+884
| +59% | +$20K |
|
856
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $4.6M | 0.01% |
358
+2
| +0.6% | +$250 |
|
857
CALL
Evergy
EVRG
$20B
| $4.58M | 0.01% |
704
+449
| +176% | +$28.6K |
|
858
Hasbro
HAS
$12.4B
| $4.58M | 0.01% |
43,349
+26,659
| +160% | +$2.77M |
|
859
CALL
Tractor Supply
TSCO
$15.9B
| $4.58M | 0.01% |
2,450
+1,480
| +153% | +$28.1K |
|
860
PUT
Regions Financial
RF
$26.2B
| $4.57M | 0.01% |
2,664
+1,989
| +295% | +$32.7K |
|
861
Kraft Heinz
KHC
$30.1B
| $4.57M | 0.01% |
142,230
-69,136
| -33% | -$2.09M |
|
862
PUT
Lindsay Corp
LNN
$1.15B
| $4.56M | 0.01% |
+475
| New | +$43.4K |
|
|
CMA
863
PUT
DELISTED
Comerica
CMA
| $4.55M | 0.01% |
634
-33
| -5% | -$2.27K |
|
864
State Street SPDR S&P Regional Banking ETF
KRE
$4.82B
| $4.55M | 0.01% |
78,075
+76,792
| +5,985% | +$4.26M |
|
865
CALL
Ligand Pharmaceuticals
LGND
$6.06B
| $4.54M | 0.01% |
697
+237
| +52% | +$15.8K |
|
866
PUT
Lumen
LUMN
$6.73B
| $4.52M | 0.01% |
3,421
+1,774
| +108% | +$23.8K |
|
|
KYNB
867
PUT
Kyntra Bio
KYNB
$28.6M
| $4.52M | 0.01% |
42
+28
| +200% | +$28.6K |
|
868
PUT
Qiagen
QGEN
$8.55B
| $4.51M | 0.01% |
1,260
+926
| +277% | +$34.4K |
|
869
CALL
Progressive
PGR
$120B
| $4.5M | 0.01% |
622
+208
| +50% | +$15K |
|
870
CALL
Clorox
CLX
$11.3B
| $4.5M | 0.01% |
293
+156
| +114% | +$23.3K |
|
871
American Express
AXP
$233B
| $4.49M | 0.01% |
+36,044
| New | +$4.31M |
|
872
CALL
Tyler Technologies
TYL
$11.9B
| $4.47M | 0.01% |
149
+30
| +25% | +$8.36K |
|
873
CALL
Capri Holdings
CPRI
$1.78B
| $4.45M | 0.01% |
1,167
-250
| -18% | -$8.63K |
|
874
PUT
Molina Healthcare
MOH
$10.4B
| $4.45M | 0.01% |
328
-141
| -30% | -$17.8K |
|
875
CALL
Baxter International
BAX
$11.2B
| $4.44M | 0.01% |
531
+169
| +47% | +$14K |
|
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.