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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
576
Becton Dickinson
BDX
$42.2B
| $6.4M | 0.01% |
+28,572
| New | +$7.06M |
|
577
CALL
Conagra Brands
CAG
$7.1B
| $6.39M | 0.01% |
+2,178
| New | +$65.6K |
|
578
PUT
Cloudflare
NET
$95.5B
| $6.37M | 0.01% |
2,712
+1,628
| +150% | +$31.7K |
|
|
ALXN
579
DELISTED
Alexion Pharmaceuticals
ALXN
| $6.36M | 0.01% |
70,805
+45,926
| +185% | +$4.51M |
|
580
CALL
Universal Display
OLED
$3.81B
| $6.35M | 0.01% |
482
-294
| -38% | -$50.6K |
|
|
CHL
581
CALL
DELISTED
China Mobile Limited
CHL
| $6.35M | 0.01% |
1,686
+1,342
| +390% | +$53.9K |
|
582
CALL
Digital Realty Trust
DLR
$66B
| $6.35M | 0.01% |
457
+314
| +220% | +$39.9K |
|
583
CALL
AutoZone
AZO
$48.5B
| $6.34M | 0.01% |
75
-282
| -79% | -$293K |
|
584
PUT
Qorvo
QRVO
$7.89B
| $6.34M | 0.01% |
786
-102
| -11% | -$10.2K |
|
585
CALL
Dow Inc
DOW
$22.5B
| $6.31M | 0.01% |
2,158
+201
| +10% | +$8.54K |
|
586
PUT
EOG Resources
EOG
$76.7B
| $6.3M | 0.01% |
1,755
+343
| +24% | +$22.3K |
|
587
PUT
First Trust Natural Gas ETF
FCG
$636M
| $6.3M | 0.01% |
1,217
+776
| +176% | +$6.45K |
|
588
CALL
NovoCure
NVCR
$1.8B
| $6.3M | 0.01% |
935
+505
| +117% | +$39.9K |
|
589
PUT
Snap
SNAP
$7.52B
| $6.3M | 0.01% |
5,296
+2,464
| +87% | +$37.8K |
|
590
CALL
Norfolk Southern
NSC
$74.3B
| $6.28M | 0.01% |
430
-79
| -16% | -$14.6K |
|
591
CALL
Advance Auto Parts
AAP
$3.35B
| $6.25M | 0.01% |
670
+476
| +245% | +$61.7K |
|
|
592
iShares 20+ Year Treasury Bond ETF
TLT
$42.2B
| $6.25M | 0.01% |
37,900
-299,845
| -89% | -$44.7M |
|
|
ANSS
593
CALL
DELISTED
Ansys
ANSS
| $6.23M | 0.01% |
268
+217
| +425% | +$55.9K |
|
594
Clorox
CLX
$11.6B
| $6.21M | 0.01% |
+35,877
| New | +$5.93M |
|
595
CALL
Live Nation Entertainment
LYV
$41.4B
| $6.21M | 0.01% |
1,367
+747
| +120% | +$46.1K |
|
596
CALL
Diageo
DEO
$46.9B
| $6.2M | 0.01% |
488
+200
| +69% | +$30K |
|
|
CGC
597
PUT
Canopy Growth
CGC
$384M
| $6.2M | 0.01% |
430
-161
| -27% | -$30.2K |
|
|
TYNS
598
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $6.19M | 0.01% |
3,178
+2,445
| +334% | +$4.76M |
|
599
PUT
Southern Company
SO
$108B
| $6.17M | 0.01% |
1,139
-1,195
| -51% | -$75.7K |
|
600
CALL
Alnylam Pharmaceuticals
ALNY
$35.6B
| $6.14M | 0.01% |
564
+81
| +17% | +$9.35K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.