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 | |
|---|---|---|---|---|---|---|
5751
PUT
O-I Glass
OI
$1.1B
| $69K | ﹤0.01% |
6,200
-3,200
| -34% | -$43.2K |
|
|
OTLY
5752
Oatly Group
OTLY
$465M
| $69K | ﹤0.01% |
3,673
-1,262
| -26% | -$26.8K |
|
5753
Schrodinger
SDGR
$1.13B
| $69K | ﹤0.01% |
3,588
-16,334
| -82% | -$376K |
|
5754
PUT
SkinHealth Systems
SKIN
$88.8M
| $69K | ﹤0.01% |
36,200
+22,100
| +157% | +$62.2K |
|
5755
PUT
Westlake Chemical Partners
WLKP
$763M
| $69K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$66.8K |
|
|
LICY
5756
PUT
DELISTED
Li-Cycle Holdings Corp.
LICY
| $69K | ﹤0.01% |
10,600
+9,825
| +1,268% | +$54.3K |
|
|
MRNS
5757
CALL
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $69K | ﹤0.01% |
59,200
+20,800
| +54% | +$52K |
|
5758
PUT
BioXcel Therapeutics
BTAI
$24.9M
| $68K | ﹤0.01% |
3,344
+863
| +35% | +$28.9K |
|
5759
PUT
Cars.com
CARS
$662M
| $68K | ﹤0.01% |
3,500
+3,400
| +3,400% | +$62.1K |
|
5760
CALL
Dine Brands
DIN
$456M
| $68K | ﹤0.01% |
1,900
-2,400
| -56% | -$99.6K |
|
|
EFC
5761
PUT
Ellington Financial
EFC
$1.67B
| $68K | ﹤0.01% |
5,700
+2,000
| +54% | +$23.6K |
|
|
KYNB
5762
Kyntra Bio
KYNB
$27.2M
| $68K | ﹤0.01% |
3,090
-4,217
| -58% | -$130K |
|
5763
CALL
Global Partners
GLP
$1.68B
| $68K | ﹤0.01% |
1,500
+900
| +150% | +$41.5K |
|
|
CBIO
5764
CALL
Crescent Biopharma
CBIO
$535M
| $68K | ﹤0.01% |
2,417
+1,518
| +169% | +$158K |
|
5765
CALL
KULR Technology Group
KULR
$123M
| $68K | ﹤0.01% |
+21,725
| New | +$77.9K |
|
5766
CALL
MidCap Financial Investment
MFIC
$787M
| $68K | ﹤0.01% |
4,500
-10,600
| -70% | -$162K |
|
5767
PUT
OSI Systems
OSIS
$3.65B
| $68K | ﹤0.01% |
500
+300
| +150% | +$41.3K |
|
5768
CALL
PennantPark Floating Rate Capital
PFLT
$689M
| $68K | ﹤0.01% |
5,900
+4,900
| +490% | +$55.6K |
|
5769
CALL
Planet Labs
PL
$7.3B
| $68K | ﹤0.01% |
36,900
+300
| +0.8% | +$575 |
|
5770
CALL
Dr. Reddy's Laboratories
RDY
$9.87B
| $68K | ﹤0.01% |
4,500
| – | – |
|
5771
PUT
Titan Machinery
TITN
$396M
| $68K | ﹤0.01% |
4,300
-700
| -14% | -$14.6K |
|
|
TSVT
5772
CALL
DELISTED
2seventy bio
TSVT
| $68K | ﹤0.01% |
17,800
+10,200
| +134% | +$46K |
|
5773
CALL
Vera Therapeutics
VERA
$2.3B
| $68K | ﹤0.01% |
1,900
-13,800
| -88% | -$547K |
|
|
NAPA
5774
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $68K | ﹤0.01% |
9,612
+7,115
| +285% | +$57.3K |
|
|
CSR
5775
CALL
Centerspace
CSR
$921M
| $67K | ﹤0.01% |
+1,000
| New | +$65.9K |
|
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.