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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
801
CALL
Stanley Black & Decker
SWK
$14.2B
| $4.33M | 0.01% |
300
-88
| -23% | -$12.4K |
|
802
PUT
Nutanix
NTNX
$14.9B
| $4.31M | 0.01% |
1,643
-493
| -23% | -$11.6K |
|
803
PUT
J.M. Smucker
SJM
$12.6B
| $4.31M | 0.01% |
392
-265
| -40% | -$29.5K |
|
804
CALL
Arista Networks
ANET
$219B
| $4.3M | 0.01% |
2,880
-5,872
| -67% | -$90.9K |
|
805
Deere & Co
DE
$170B
| $4.3M | 0.01% |
25,497
+12,434
| +95% | +$1.99M |
|
806
PUT
BHP
BHP
$213B
| $4.29M | 0.01% |
974
-410
| -30% | -$19.1K |
|
807
CALL
HP
HPQ
$23.5B
| $4.27M | 0.01% |
2,258
+64
| +3% | +$1.26K |
|
|
KFYP
808
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $4.27M | 0.01% |
1,037
-289
| -22% | -$7.85K |
|
809
CALL
Bread Financial
BFH
$4.21B
| $4.27M | 0.01% |
417
+169
| +68% | +$19K |
|
810
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $4.25M | 0.01% |
356
+151
| +74% | +$18K |
|
|
AAN.A
811
CALL
DELISTED
The Aaron's Company Inc Class A
AAN.A
| $4.24M | 0.01% |
660
+637
| +2,770% | +$4.09M |
|
812
CALL
Tandem Diabetes Care
TNDM
$1.17B
| $4.24M | 0.01% |
719
+370
| +106% | +$23.6K |
|
813
CALL
VeriSign
VRSN
$25.5B
| $4.22M | 0.01% |
224
-54
| -19% | -$11.1K |
|
814
CALL
Sea Limited
SE
$61.2B
| $4.22M | 0.01% |
1,365
-1,037
| -43% | -$34.8K |
|
815
CALL
DXC Technology
DXC
$1.63B
| $4.22M | 0.01% |
1,430
+542
| +61% | +$23.1K |
|
|
CBM
816
PUT
DELISTED
Cambrex Corporation
CBM
| $4.21M | 0.01% |
708
+359
| +103% | +$19.2K |
|
817
PUT
Macy's
M
$6.15B
| $4.2M | 0.01% |
2,701
+1,134
| +72% | +$21K |
|
818
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $4.18M | 0.01% |
350
+235
| +204% | +$27.7K |
|
819
PUT
Extra Space Storage
EXR
$31.2B
| $4.18M | 0.01% |
358
+357
| +35,700% | +$41.3K |
|
820
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $4.18M | 0.01% |
520
+355
| +215% | +$28.1K |
|
821
PUT
Archer Daniels Midland
ADM
$41.4B
| $4.18M | 0.01% |
1,017
+572
| +129% | +$22.8K |
|
822
CALL
Dick's Sporting Goods
DKS
$18.4B
| $4.17M | 0.01% |
1,023
+906
| +774% | +$32.6K |
|
823
CALL
IQVIA
IQV
$34.7B
| $4.17M | 0.01% |
279
+115
| +70% | +$17.9K |
|
|
CHL
824
PUT
DELISTED
China Mobile Limited
CHL
| $4.16M | 0.01% |
1,006
+847
| +533% | +$36.1K |
|
825
CALL
Xerox
XRX
$337M
| $4.15M | 0.01% |
1,389
+379
| +38% | +$11.9K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.