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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4326
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$177M
| $274K | ﹤0.01% |
+9,254
| New | +$379K |
|
|
ILPT
4327
CALL
Industrial Logistics Properties Trust
ILPT
$589M
| $273K | ﹤0.01% |
58,100
-45,700
| -44% | -$148K |
|
4328
Kennametal
KMT
$2.59B
| $273K | ﹤0.01% |
+10,596
| New | +$255K |
|
4329
ProShares Ultra Gold
UGL
$668M
| $273K | ﹤0.01% |
+17,108
| New | +$254K |
|
4330
Verra Mobility
VRRM
$782M
| $273K | ﹤0.01% |
11,873
+7,566
| +176% | +$155K |
|
|
AXNX
4331
CALL
DELISTED
Axonics, Inc. Common Stock
AXNX
| $273K | ﹤0.01% |
4,400
-11,000
| -71% | -$615K |
|
|
AUGX
4332
PUT
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $273K | ﹤0.01% |
46,800
+46,400
| +11,600% | +$244K |
|
4333
Alto Ingredients
ALTO
$346M
| $272K | ﹤0.01% |
102,279
+93,639
| +1,084% | +$298K |
|
|
DOO
4334
PUT
Bombardier Recreational Products
DOO
$4.54B
| $272K | ﹤0.01% |
+3,800
| New | +$266K |
|
4335
CALL
SPX Corp
SPXC
$9.66B
| $272K | ﹤0.01% |
2,700
+2,300
| +575% | +$199K |
|
4336
PUT
LendingTree
TREE
$571M
| $272K | ﹤0.01% |
9,000
-38,500
| -81% | -$698K |
|
4337
Universal Corp
UVV
$1.37B
| $272K | ﹤0.01% |
4,055
+3,906
| +2,621% | +$209K |
|
4338
PUT
WEX
WEX
$6.51B
| $272K | ﹤0.01% |
1,400
+300
| +27% | +$54.4K |
|
|
AUGX
4339
CALL
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $272K | ﹤0.01% |
46,600
+46,100
| +9,220% | +$243K |
|
4340
PUT
ProFrac Holding
ACDC
$666M
| $271K | ﹤0.01% |
32,000
+26,700
| +504% | +$234K |
|
4341
Limoneira
LMNR
$245M
| $271K | ﹤0.01% |
13,137
+12,703
| +2,927% | +$205K |
|
4342
CALL
Arcos Dorados Holdings
ARCO
$1.77B
| $270K | ﹤0.01% |
21,300
+21,000
| +7,000% | +$225K |
|
4343
PUT
Brookdale Senior Living
BKD
$3.61B
| $270K | ﹤0.01% |
46,500
+5,500
| +13% | +$25.8K |
|
|
DESP
4344
DELISTED
Despegar.com
DESP
| $270K | ﹤0.01% |
28,567
+19,790
| +225% | +$153K |
|
4345
PUT
Ameresco
AMRC
$1.01B
| $269K | ﹤0.01% |
8,500
-3,500
| -29% | -$106K |
|
4346
PUT
BlackBerry
BB
$4.75B
| $269K | ﹤0.01% |
76,200
-242,700
| -76% | -$911K |
|
4347
CALL
Lufax Holding
LU
$1.33B
| $269K | ﹤0.01% |
87,700
+65,725
| +299% | +$245K |
|
|
CALY
4348
PUT
Callaway Golf Company
CALY
$3.36B
| $269K | ﹤0.01% |
18,800
-58,300
| -76% | -$749K |
|
4349
PUT
Equinox Gold
EQX
$7.2B
| $268K | ﹤0.01% |
54,900
+14,200
| +35% | +$67.4K |
|
4350
Herc Holdings
HRI
$4.96B
| $268K | ﹤0.01% |
+1,806
| New | +$221K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.