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 | |
|---|---|---|---|---|---|---|
5151
PUT
Elbit Systems
ESLT
$36.8B
| $123K | ﹤0.01% |
700
-42,800
| -98% | -$8.35M |
|
5152
CALL
Fortune Brands Innovations
FBIN
$5.88B
| $123K | ﹤0.01% |
1,900
-5,000
| -72% | -$361K |
|
5153
PUT
INmune Bio
INMB
$47.1M
| $123K | ﹤0.01% |
14,000
+13,700
| +4,567% | +$135K |
|
5154
CALL
Medpace
MEDP
$16.1B
| $123K | ﹤0.01% |
300
-2,100
| -88% | -$832K |
|
5155
Relmada Therapeutics
RLMD
$562M
| $123K | ﹤0.01% |
41,270
-5,443
| -12% | -$19.7K |
|
5156
Vulcan Materials
VMC
$35.2B
| $123K | ﹤0.01% |
+495
| New | +$128K |
|
5157
CALL
Wrap Technologies
WRAP
$98.1M
| $123K | ﹤0.01% |
61,500
+7,900
| +15% | +$13.7K |
|
|
NVEI
5158
CALL
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $123K | ﹤0.01% |
3,800
-98,000
| -96% | -$3.16M |
|
|
NVEI
5159
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $123K | ﹤0.01% |
3,824
-91,543
| -96% | -$2.95M |
|
|
ETRN
5160
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $123K | ﹤0.01% |
9,504
-184,641
| -95% | -$2.48M |
|
5161
PUT
AppFolio
APPF
$6.23B
| $122K | ﹤0.01% |
500
-9,200
| -95% | -$2.14M |
|
5162
Calix
CALX
$2.22B
| $122K | ﹤0.01% |
3,464
+396
| +13% | +$12.7K |
|
5163
PUT
Corbus Pharmaceuticals
CRBP
$168M
| $122K | ﹤0.01% |
2,700
-900
| -25% | -$37.9K |
|
|
JAMF
5164
PUT
DELISTED
Jamf
JAMF
| $122K | ﹤0.01% |
7,400
-1,700
| -19% | -$29.8K |
|
5165
CALL
Mercury Insurance
MCY
$5.91B
| $122K | ﹤0.01% |
2,300
-1,800
| -44% | -$97.5K |
|
|
MRUS
5166
DELISTED
Merus
MRUS
| $122K | ﹤0.01% |
2,073
+170
| +9% | +$8.23K |
|
5167
PUT
Nkarta
NKTX
$154M
| $122K | ﹤0.01% |
20,700
-5,800
| -22% | -$41K |
|
5168
Global X Russell 2000 Covered Call ETF
RYLD
$1.37B
| $122K | ﹤0.01% |
+7,668
| New | +$125K |
|
5169
CALL
Seanergy Maritime Holdings
SHIP
$386M
| $122K | ﹤0.01% |
12,400
-4,800
| -28% | -$49.9K |
|
|
AIV
5170
Aimco
AIV
$383M
| $121K | ﹤0.01% |
14,647
-24,920
| -63% | -$201K |
|
5171
Avantis US Small Cap Value ETF
AVUV
$30.3B
| $121K | ﹤0.01% |
1,351
+423
| +46% | +$38.3K |
|
5172
CALL
Columbia Banking Systems
COLB
$8.84B
| $121K | ﹤0.01% |
+6,100
| New | +$116K |
|
|
DHC
5173
CALL
Diversified Healthcare Trust
DHC
$2.17B
| $121K | ﹤0.01% |
39,900
-400
| -1% | -$1.01K |
|
5174
PUT
Fulgent Genetics
FLGT
$574M
| $121K | ﹤0.01% |
6,200
+1,900
| +44% | +$39.7K |
|
5175
Leggett & Platt
LEG
$1.37B
| $121K | ﹤0.01% |
10,621
-22,589
| -68% | -$319K |
|
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.