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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6876
CALL
Diana Shipping
DSX
$266M
| $20K | ﹤0.01% |
+7,100
| New | +$21.1K |
|
6877
ProShares UltraShort Dow 30
DXD
$43.6M
| $20K | ﹤0.01% |
643
-1,948
| -75% | -$63.6K |
|
6878
iShares MSCI Pacific ex Japan ETF
EPP
$2.21B
| $20K | ﹤0.01% |
+485
| New | +$20.9K |
|
6879
Haemonetics
HAE
$3.88B
| $20K | ﹤0.01% |
+251
| New | +$22.1K |
|
6880
HEICO Corp Class A
HEI.A
$36B
| $20K | ﹤0.01% |
+116
| New | +$19.6K |
|
6881
CALL
IDEX
IEX
$17B
| $20K | ﹤0.01% |
100
| – | – |
|
|
JFIN
6882
Jiayin Group
JFIN
$115M
| $20K | ﹤0.01% |
+3,319
| New | +$21.8K |
|
6883
CALL
Kiniksa Pharmaceuticals
KNSA
$6.23B
| $20K | ﹤0.01% |
1,100
+800
| +267% | +$15K |
|
6884
CALL
Kearny Financial
KRNY
$604M
| $20K | ﹤0.01% |
3,300
+100
| +3% | +$572 |
|
6885
PUT
Liberty Broadband Class C
LBRDK
$4.89B
| $20K | ﹤0.01% |
400
-8,700
| -96% | -$449K |
|
6886
MeiraGTx Holdings
MGTX
$1.08B
| $20K | ﹤0.01% |
4,756
+1,435
| +43% | +$7.24K |
|
|
MODV
6887
DELISTED
ModivCare
MODV
| $20K | ﹤0.01% |
764
-6,140
| -89% | -$155K |
|
|
MODV
6888
PUT
DELISTED
ModivCare
MODV
| $20K | ﹤0.01% |
800
-14,900
| -95% | -$377K |
|
|
NEWP
6889
New Pacific Metals
NEWP
$809M
| $20K | ﹤0.01% |
13,370
+11,070
| +481% | +$21K |
|
6890
CALL
National Health Investors
NHI
$3.79B
| $20K | ﹤0.01% |
300
-800
| -73% | -$51.3K |
|
6891
Newmark Group
NMRK
$2.64B
| $20K | ﹤0.01% |
2,046
-3,713
| -64% | -$37.8K |
|
6892
CALL
NETSCOUT
NTCT
$2.83B
| $20K | ﹤0.01% |
1,100
-9,400
| -90% | -$185K |
|
6893
Nuvation Bio
NUVB
$2.29B
| $20K | ﹤0.01% |
+7,056
| New | +$21.5K |
|
6894
CALL
Parke Bancorp
PKBK
$397M
| $20K | ﹤0.01% |
1,200
+200
| +20% | +$3.27K |
|
6895
Invesco BuyBack Achievers ETF
PKW
$1.72B
| $20K | ﹤0.01% |
+199
| New | +$20.7K |
|
6896
CALL
Playboy Inc
PLBY
$136M
| $20K | ﹤0.01% |
26,700
+4,600
| +21% | +$4.28K |
|
6897
ProShares Trust UltraShort Lehman 7-10 Year Treasury
PST
$10.6M
| $20K | ﹤0.01% |
844
+800
| +1,818% | +$19.3K |
|
|
RPC
6898
CALL
Ridgepost Capital
RPC
$926M
| $20K | ﹤0.01% |
2,400
+400
| +20% | +$3.19K |
|
|
RGLS
6899
CALL
DELISTED
Regulus Therapeutics
RGLS
| $20K | ﹤0.01% |
11,300
-5,700
| -34% | -$13.2K |
|
6900
PUT
Relmada Therapeutics
RLMD
$540M
| $20K | ﹤0.01% |
6,800
+5,600
| +467% | +$20.3K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.