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 | |
|---|---|---|---|---|---|---|
51
CALL
Advanced Micro Devices
AMD
$888B
| $100M | 0.18% |
22,044
+2,662
| +14% | +$128K |
|
52
CALL
Micron Technology
MU
$1.1T
| $94.9M | 0.17% |
22,563
+12,905
| +134% | +$671K |
|
53
PUT
Shopify
SHOP
$160B
| $94.8M | 0.17% |
22,740
-21,840
| -49% | -$985K |
|
54
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $94.5M | 0.17% |
27,916
+27,403
| +5,342% | +$829K |
|
|
55
PUT
JPMorgan Chase
JPM
$918B
| $91.7M | 0.16% |
10,275
+5,245
| +104% | +$637K |
|
56
PUT
Costco
COST
$412B
| $91.6M | 0.16% |
3,213
+1,204
| +60% | +$365K |
|
57
PUT
Johnson & Johnson
JNJ
$599B
| $90.3M | 0.16% |
6,884
+3,378
| +96% | +$479K |
|
58
PUT
AT&T
T
$155B
| $88.2M | 0.16% |
40,081
+27,148
| +210% | +$742K |
|
59
CALL
Gilead Sciences
GILD
$165B
| $85.7M | 0.15% |
11,459
+5,923
| +107% | +$409K |
|
60
PUT
Booking.com
BKNG
$139B
| $85.6M | 0.15% |
15,900
-11,575
| -42% | -$812K |
|
61
CALL
Uber
UBER
$146B
| $84.4M | 0.15% |
30,237
+21,826
| +259% | +$718K |
|
62
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$154B
| $83.6M | 0.15% |
+18,394
| New | +$903K |
|
63
PUT
Broadcom
AVGO
$1.84T
| $82.1M | 0.14% |
34,630
+4,680
| +16% | +$132K |
|
64
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $81M | 0.14% |
4,429
+1,217
| +38% | +$259K |
|
65
CALL
ExxonMobil
XOM
$629B
| $80.6M | 0.14% |
21,217
+17,153
| +422% | +$947K |
|
|
66
PUT
Micron Technology
MU
$1.1T
| $80.3M | 0.14% |
19,100
+1,796
| +10% | +$93.4K |
|
67
CALL
Intel
INTC
$530B
| $80.2M | 0.14% |
14,812
+7,967
| +116% | +$471K |
|
|
68
PUT
Advanced Micro Devices
AMD
$888B
| $79.5M | 0.14% |
17,478
+1,175
| +7% | +$56.6K |
|
69
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $78.3M | 0.14% |
31,235
+10,875
| +53% | +$223K |
|
|
70
CALL
JPMorgan Chase
JPM
$918B
| $77.7M | 0.14% |
8,755
+411
| +5% | +$49.9K |
|
|
71
CALL
Johnson & Johnson
JNJ
$599B
| $77.6M | 0.14% |
5,920
+1,835
| +45% | +$260K |
|
|
UCD
72
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $77.1M | 0.14% |
19,187
+8,411
| +78% | +$33.8M |
|
73
CALL
Salesforce
CRM
$139B
| $75.7M | 0.13% |
5,259
+2,483
| +89% | +$426K |
|
|
74
PUT
Salesforce
CRM
$139B
| $74.2M | 0.13% |
5,151
+557
| +12% | +$95.5K |
|
75
PUT
Starbucks
SBUX
$119B
| $72.1M | 0.13% |
10,965
+5,942
| +118% | +$481K |
|
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.