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 | |
|---|---|---|---|---|---|---|
726
Texas Instruments
TXN
$268B
| $4.71M | 0.01% |
+47,137
| New | +$5.66M |
|
|
SGEN
727
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $4.71M | 0.01% |
408
+179
| +78% | +$19.8K |
|
|
CERN
728
PUT
DELISTED
Cerner Corp
CERN
| $4.71M | 0.01% |
747
+170
| +29% | +$12.1K |
|
729
CALL
Arista Networks
ANET
$220B
| $4.7M | 0.01% |
3,712
-2,496
| -40% | -$32.4K |
|
730
PUT
RTX Corp
RTX
$262B
| $4.67M | 0.01% |
+1,786
| New | +$151K |
|
731
PUT
Take-Two Interactive
TTWO
$43.4B
| $4.66M | 0.01% |
393
-585
| -60% | -$69.2K |
|
732
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $4.66M | 0.01% |
+490
| New | +$30.1K |
|
733
PUT
Sun Communities
SUI
$14.7B
| $4.64M | 0.01% |
372
-72
| -16% | -$10.9K |
|
734
CALL
Quest Diagnostics
DGX
$23.2B
| $4.63M | 0.01% |
576
+374
| +185% | +$38.7K |
|
735
iShares Select Dividend ETF
DVY
$23.8B
| $4.63M | 0.01% |
62,902
+55,511
| +751% | +$5.31M |
|
|
ABMD
736
PUT
DELISTED
Abiomed Inc
ABMD
| $4.62M | 0.01% |
318
-42
| -12% | -$6.97K |
|
737
CALL
Exelon
EXC
$47.8B
| $4.59M | 0.01% |
1,747
+23
| +1% | +$723 |
|
738
Check Point Software Technologies
CHKP
$13.3B
| $4.58M | 0.01% |
45,560
+35,553
| +355% | +$3.81M |
|
739
PUT
Advance Auto Parts
AAP
$3.35B
| $4.57M | 0.01% |
490
-139
| -22% | -$18K |
|
740
CALL
Electronic Arts
EA
$52.4B
| $4.57M | 0.01% |
456
-662
| -59% | -$69.7K |
|
741
PUT
Marvell Technology
MRVL
$189B
| $4.54M | 0.01% |
2,008
-225
| -10% | -$5.39K |
|
|
IPFF
742
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $4.54M | 0.01% |
1,492
+848
| +132% | +$11.7K |
|
|
K
743
PUT
DELISTED
Kellanova
K
| $4.52M | 0.01% |
803
+375
| +88% | +$23K |
|
744
PUT
Colgate-Palmolive
CL
$73.3B
| $4.52M | 0.01% |
681
-638
| -48% | -$45K |
|
745
PUT
Norfolk Southern
NSC
$74.3B
| $4.51M | 0.01% |
309
-59
| -16% | -$10.9K |
|
746
CALL
Aflac
AFL
$62.9B
| $4.51M | 0.01% |
1,317
-276
| -17% | -$12.6K |
|
747
PUT
UBS Group
UBS
$173B
| $4.5M | 0.01% |
4,866
+3,248
| +201% | +$37.4K |
|
748
PUT
Acadia Pharmaceuticals
ACAD
$4.27B
| $4.49M | 0.01% |
1,063
-46
| -4% | -$1.9K |
|
|
PARA
749
CALL
DELISTED
Paramount Global Class B
PARA
| $4.49M | 0.01% |
+3,203
| New | +$91.8K |
|
|
HES
750
CALL
DELISTED
Hess
HES
| $4.49M | 0.01% |
1,347
+499
| +59% | +$27K |
|
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.