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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SVFAU
6526
CALL
DELISTED
SVF Investment Corp. Unit
SVFAU
| $115K | ﹤0.01% |
+11,700
| New | +$121K |
|
6527
PUT
InfraCap MLP ETF
AMZA
$470M
| $114K | ﹤0.01% |
3,900
+3,898
| +194,900% | +$108K |
|
|
CLSD
6528
PUT
DELISTED
Clearside Biomedical
CLSD
| $114K | ﹤0.01% |
1,567
+1,566
| +156,600% | +$72.8K |
|
6529
CALL
Douglas Emmett
DEI
$1.98B
| $114K | ﹤0.01% |
3,400
+3,388
| +28,233% | +$115K |
|
6530
PUT
Extra Space Storage
EXR
$31.3B
| $114K | ﹤0.01% |
700
+696
| +17,400% | +$104K |
|
6531
CALL
Hayward Holdings
HAYW
$3.21B
| $114K | ﹤0.01% |
4,400
+4,375
| +17,500% | +$95.5K |
|
6532
PUT
iBio
IBIO
$69.5M
| $114K | ﹤0.01% |
152
+150
| +7,500% | +$109K |
|
6533
Integer Holdings
ITGR
$4.12B
| $114K | ﹤0.01% |
+1,214
| New | +$112K |
|
6534
PUT
Jack Henry & Associates
JKHY
$10.9B
| $114K | ﹤0.01% |
700
+676
| +2,817% | +$108K |
|
6535
Meta Platforms (Facebook)
META
$1.42T
| $114K | ﹤0.01% |
330
| – | – |
|
6536
PUT
Monro
MNRO
$383M
| $114K | ﹤0.01% |
1,800
+1,784
| +11,150% | +$118K |
|
6537
National CineMedia
NCMI
$376M
| $114K | ﹤0.01% |
2,262
-953
| -30% | -$44.7K |
|
6538
CALL
NanoViricides
NNVC
$38.8M
| $114K | ﹤0.01% |
24,600
+24,488
| +21,864% | +$98.9K |
|
6539
CALL
Stellus Capital Investment Corp
SCM
$217M
| $114K | ﹤0.01% |
9,100
+8,913
| +4,766% | +$118K |
|
|
XIN
6540
PUT
DELISTED
Xinyuan Real Estate
XIN
| $114K | ﹤0.01% |
4,310
+4,250
| +7,083% | +$110K |
|
|
EXE
6541
CALL
Expand Energy Corp
EXE
$21.8B
| $114K | ﹤0.01% |
21,500
+21,306
| +10,982% | +$1.06M |
|
|
APTX
6542
PUT
DELISTED
Aptinyx Inc. Common Stock
APTX
| $114K | ﹤0.01% |
40,500
+40,364
| +29,679% | +$113K |
|
|
ROI
6543
CALL
DELISTED
WISDOMTREE LARGECAP GROWTH FUND
ROI
| $114K | ﹤0.01% |
1,500
+1,472
| +5,257% | +$112K |
|
6544
Allogene Therapeutics
ALLO
$649M
| $113K | ﹤0.01% |
4,350
-16,332
| -79% | -$466K |
|
6545
CALL
Community Bank
CBU
$3.41B
| $113K | ﹤0.01% |
1,500
+1,485
| +9,900% | +$117K |
|
6546
ICU Medical
ICUI
$4.21B
| $113K | ﹤0.01% |
553
-3,198
| -85% | -$658K |
|
|
MTA
6547
PUT
Metalla Royalty & Streaming
MTA
$688M
| $113K | ﹤0.01% |
13,300
+13,239
| +21,703% | +$129K |
|
|
TGB
6548
PUT
Trekor Metals
TGB
$2.48B
| $113K | ﹤0.01% |
53,700
+53,316
| +13,884% | +$115K |
|
6549
CALL
Wintrust Financial
WTFC
$10.8B
| $113K | ﹤0.01% |
1,500
+1,499
| +149,900% | +$117K |
|
|
NSTG
6550
DELISTED
NanoString Technologies, Inc.
NSTG
| $113K | ﹤0.01% |
1,759
+732
| +71% | +$46.5K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.