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 | |
|---|---|---|---|---|---|---|
2451
PUT
Floor & Decor
FND
$5.81B
| $574K | ﹤0.01% |
179
+134
| +298% | +$6.26K |
|
2452
Stride
LRN
$3.69B
| $574K | ﹤0.01% |
30,462
+25,593
| +526% | +$472K |
|
2453
Voya Financial
VOYA
$8.94B
| $574K | ﹤0.01% |
+14,167
| New | +$773K |
|
2454
CALL
Bread Financial
BFH
$4.21B
| $572K | ﹤0.01% |
213
+15
| +8% | +$1.02K |
|
2455
CALL
Tetra Tech
TTEK
$8.23B
| $572K | ﹤0.01% |
405
+375
| +1,250% | +$6.39K |
|
2456
Copart
CPRT
$25.9B
| $571K | ﹤0.01% |
+33,348
| New | +$742K |
|
|
DCP
2457
PUT
DELISTED
DCP Midstream, LP
DCP
| $571K | ﹤0.01% |
1,405
-38
| -3% | -$633 |
|
2458
CALL
United Natural Foods
UNFI
$3.01B
| $570K | ﹤0.01% |
622
+580
| +1,381% | +$4.6K |
|
2459
PUT
Xerox
XRX
$337M
| $570K | ﹤0.01% |
301
-428
| -59% | -$13.6K |
|
2460
CALL
Prosperity Bancshares
PB
$8.77B
| $569K | ﹤0.01% |
+118
| New | +$7.68K |
|
|
MIC
2461
CALL
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $568K | ﹤0.01% |
225
+131
| +139% | +$5.01K |
|
|
CZR
2462
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $567K | ﹤0.01% |
840
-414
| -33% | -$4.87K |
|
2463
CALL
AnaptysBio
ANAB
$1.6B
| $566K | ﹤0.01% |
401
-129
| -24% | -$1.96K |
|
2464
Booz Allen Hamilton
BAH
$8.7B
| $566K | ﹤0.01% |
8,258
+4,968
| +151% | +$366K |
|
2465
iShares MSCI Italy ETF
EWI
$911M
| $564K | ﹤0.01% |
27,187
+26,041
| +2,272% | +$695K |
|
|
HTT
2466
PUT
High Templar Tech Ltd
HTT
$377M
| $564K | ﹤0.01% |
3,136
+1,767
| +129% | +$4.96K |
|
|
ACIA
2467
CALL
DELISTED
Acacia Communications Inc
ACIA
| $564K | ﹤0.01% |
84
+36
| +75% | +$2.44K |
|
|
AAWW
2468
PUT
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $564K | ﹤0.01% |
220
+96
| +77% | +$2.4K |
|
2469
PUT
Lantheus
LNTH
$6.82B
| $563K | ﹤0.01% |
442
+134
| +44% | +$2.14K |
|
2470
CALL
BlackLine
BL
$1.69B
| $562K | ﹤0.01% |
107
-68
| -39% | -$3.98K |
|
2471
CALL
WD-40
WDFC
$3.1B
| $562K | ﹤0.01% |
28
+14
| +100% | +$2.64K |
|
2472
Dycom Industries
DY
$12.9B
| $561K | ﹤0.01% |
21,885
+15,575
| +247% | +$551K |
|
2473
CALL
NiSource
NI
$22.4B
| $561K | ﹤0.01% |
225
+101
| +81% | +$2.79K |
|
2474
CALL
Ingevity
NGVT
$2.55B
| $559K | ﹤0.01% |
159
+158
| +15,800% | +$9.23K |
|
2475
CALL
United Parks & Resorts
PRKS
$2.11B
| $559K | ﹤0.01% |
508
-385
| -43% | -$10.5K |
|
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.