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 | |
|---|---|---|---|---|---|---|
4751
Pacer US Cash Cows 100 ETF
COWZ
$19B
| $185K | ﹤0.01% |
3,565
-1,063
| -23% | -$52.8K |
|
4752
PUT
Comfort Systems
FIX
$53.5B
| $185K | ﹤0.01% |
+900
| New | +$166K |
|
|
ODP
4753
PUT
DELISTED
ODP
ODP
| $185K | ﹤0.01% |
3,300
-11,400
| -78% | -$542K |
|
|
BLFY
4754
CALL
DELISTED
Blue Foundry Bancorp
BLFY
| $184K | ﹤0.01% |
19,100
| – | – |
|
4755
CALL
Cheniere Energy
CQP
$30.5B
| $184K | ﹤0.01% |
3,700
+2,500
| +208% | +$139K |
|
4756
Dream Finders Homes
DFH
$1.41B
| $184K | ﹤0.01% |
+5,185
| New | +$129K |
|
4757
PUT
Ecopetrol
EC
$33.7B
| $184K | ﹤0.01% |
15,500
+1,300
| +9% | +$15.8K |
|
4758
CALL
Kemper
KMPR
$1.81B
| $184K | ﹤0.01% |
+3,800
| New | +$166K |
|
|
REE
4759
CALL
DELISTED
REE Automotive
REE
| $184K | ﹤0.01% |
36,800
+35,573
| +2,899% | +$150K |
|
4760
CALL
Robert Half
RHI
$4.11B
| $184K | ﹤0.01% |
2,100
-18,000
| -90% | -$1.43M |
|
4761
Banc of California
BANC
$2.87B
| $183K | ﹤0.01% |
13,653
-121,438
| -90% | -$1.5M |
|
4762
CALL
Butterfly Network
BFLY
$1.86B
| $183K | ﹤0.01% |
169,500
+25,400
| +18% | +$25.1K |
|
4763
PUT
Evolution Petroleum
EPM
$133M
| $183K | ﹤0.01% |
31,500
+21,800
| +225% | +$133K |
|
4764
CALL
Hayward Holdings
HAYW
$3.23B
| $183K | ﹤0.01% |
13,500
+1,100
| +9% | +$13.5K |
|
4765
Enpro
NPO
$6.26B
| $183K | ﹤0.01% |
1,172
+1,150
| +5,227% | +$149K |
|
|
BNKK
4766
CALL
Bonk Inc
BNKK
$7.7M
| $183K | ﹤0.01% |
+1,497
| New | +$141K |
|
|
TUP
4767
DELISTED
Tupperware Brands Corporation
TUP
| $183K | ﹤0.01% |
91,593
-28,474
| -24% | -$51.6K |
|
|
CAN
4768
PUT
Canaan Creative
CAN
$172M
| $182K | ﹤0.01% |
79,000
+66,800
| +548% | +$125K |
|
4769
PUT
Euronet Worldwide
EEFT
$3.19B
| $182K | ﹤0.01% |
1,800
+700
| +64% | +$59.7K |
|
4770
PUT
Harmony Gold Mining
HMY
$9.7B
| $182K | ﹤0.01% |
29,700
+15,700
| +112% | +$82.5K |
|
4771
CALL
Rigel Pharmaceuticals
RIGL
$723M
| $182K | ﹤0.01% |
12,580
+2,110
| +20% | +$21.6K |
|
4772
CALL
Vishay Intertechnology
VSH
$4.6B
| $182K | ﹤0.01% |
7,600
+7,300
| +2,433% | +$169K |
|
4773
CALL
ADT
ADT
$5.43B
| $181K | ﹤0.01% |
26,600
+20,500
| +336% | +$128K |
|
4774
CALL
CNO Financial Group
CNO
$4.94B
| $181K | ﹤0.01% |
+6,500
| New | +$164K |
|
4775
Direxion Daily TSLA Bear 1X ETF
TSLS
$89.5M
| $181K | ﹤0.01% |
+963
| New | +$195K |
|
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.