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 | |
|---|---|---|---|---|---|---|
4901
iShares Select U.S. REIT ETF
ICF
$2.13B
| $156K | ﹤0.01% |
2,725
+710
| +35% | +$39.4K |
|
|
KLG
4902
PUT
DELISTED
WK Kellogg Co
KLG
| $156K | ﹤0.01% |
9,500
+2,300
| +32% | +$46.7K |
|
4903
Ocular Therapeutix
OCUL
$1.83B
| $156K | ﹤0.01% |
22,942
-10,899
| -32% | -$67.3K |
|
4904
PUT
Pulse Biosciences
PLSE
$2.37B
| $156K | ﹤0.01% |
14,000
-8,200
| -37% | -$77.2K |
|
4905
CALL
POET Technologies
POET
$1.1B
| $156K | ﹤0.01% |
+75,400
| New | +$136K |
|
4906
T-REX 2X Long Tesla Daily Target ETF
TSLT
$115M
| $156K | ﹤0.01% |
12,375
+11,274
| +1,024% | +$117K |
|
4907
CALL
UFP Industries
UFPI
$4.95B
| $156K | ﹤0.01% |
1,400
-29,100
| -95% | -$3.38M |
|
4908
PUT
GeneDx Holdings
WGS
$1.89B
| $156K | ﹤0.01% |
6,000
+5,800
| +2,900% | +$110K |
|
4909
Klaviyo
KVYO
$5.8B
| $155K | ﹤0.01% |
6,228
-13,418
| -68% | -$314K |
|
4910
Lightwave Logic
LWLG
$823M
| $155K | ﹤0.01% |
51,940
-91
| -0.2% | -$333 |
|
4911
CALL
OceanFirst Financial
OCFC
$1.71B
| $155K | ﹤0.01% |
9,800
+2,600
| +36% | +$39.3K |
|
|
DX
4912
PUT
Dynex Capital
DX
$3.18B
| $154K | ﹤0.01% |
12,900
+400
| +3% | +$4.81K |
|
4913
Kontoor Brands
KTB
$4.71B
| $154K | ﹤0.01% |
+2,331
| New | +$152K |
|
4914
PUT
Mattel
MAT
$4.47B
| $154K | ﹤0.01% |
9,500
-417,500
| -98% | -$7.56M |
|
4915
PUT
Power Integrations
POWI
$3.15B
| $154K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$144K |
|
|
WOW
4916
CALL
DELISTED
WideOpenWest
WOW
| $154K | ﹤0.01% |
28,600
+20,500
| +253% | +$90.9K |
|
|
BLUE
4917
PUT
DELISTED
bluebird bio
BLUE
| $153K | ﹤0.01% |
7,785
-3,915
| -33% | -$78.4K |
|
4918
CALL
Coca-Cola Europacific Partners
CCEP
$49.1B
| $153K | ﹤0.01% |
2,100
-30,200
| -93% | -$2.17M |
|
4919
CALL
Coursera
COUR
$1.77B
| $153K | ﹤0.01% |
21,400
-22,100
| -51% | -$210K |
|
4920
CALL
Grand Canyon Education
LOPE
$4.22B
| $153K | ﹤0.01% |
1,100
-28,200
| -96% | -$3.89M |
|
4921
PUT
LiveWire
LVWR
$530M
| $153K | ﹤0.01% |
20,000
+16,000
| +400% | +$112K |
|
4922
Unusual Whales Subversive Democratic Trading ETF
NANC
$268M
| $153K | ﹤0.01% |
+4,219
| New | +$146K |
|
4923
CALL
Navigator Holdings
NVGS
$1.35B
| $153K | ﹤0.01% |
8,800
-4,700
| -35% | -$75.8K |
|
|
PENG
4924
CALL
Penguin Solutions Inc
PENG
$2.24B
| $153K | ﹤0.01% |
6,700
-11,400
| -63% | -$237K |
|
4925
CALL
Victory Capital Holdings
VCTR
$6.09B
| $152K | ﹤0.01% |
3,200
+2,400
| +300% | +$117K |
|
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.