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 | |
|---|---|---|---|---|---|---|
6151
iShares Global Tech ETF
IXN
$8.34B
| $47K | ﹤0.01% |
+579
| New | +$44.1K |
|
6152
PUT
LSB Industries
LXU
$794M
| $47K | ﹤0.01% |
5,800
+800
| +16% | +$6.99K |
|
6153
CALL
Marcus Corp
MCS
$912M
| $47K | ﹤0.01% |
4,200
-900
| -18% | -$10.7K |
|
6154
PUT
Mirum Pharmaceuticals
MIRM
$6.87B
| $47K | ﹤0.01% |
1,400
-900
| -39% | -$23.6K |
|
6155
NET Power
NPWR
$130M
| $47K | ﹤0.01% |
4,800
-3,787
| -44% | -$40.2K |
|
6156
CALL
Primerica
PRI
$10.1B
| $47K | ﹤0.01% |
+200
| New | +$45.4K |
|
6157
PUT
Rekor Systems
REKR
$84.6M
| $47K | ﹤0.01% |
30,700
+24,500
| +395% | +$42.9K |
|
|
SHOE
6158
PUT
Shoe Station Group
SHOE
$420M
| $47K | ﹤0.01% |
1,300
+100
| +8% | +$3.55K |
|
|
SNCR
6159
CALL
DELISTED
Synchronoss Technologies
SNCR
| $47K | ﹤0.01% |
5,100
-400
| -7% | -$3.25K |
|
6160
PUT
Sterling Infrastructure
STRL
$17.8B
| $47K | ﹤0.01% |
400
-12,700
| -97% | -$1.45M |
|
|
THS
6161
PUT
DELISTED
Treehouse Foods
THS
| $47K | ﹤0.01% |
1,300
+800
| +160% | +$29K |
|
6162
UFP Industries
UFPI
$4.87B
| $47K | ﹤0.01% |
+422
| New | +$49K |
|
6163
PUT
Valvoline
VVV
$4.9B
| $47K | ﹤0.01% |
1,100
+900
| +450% | +$37.8K |
|
6164
CALL
Artivion
AORT
$1.34B
| $46K | ﹤0.01% |
1,800
-4,200
| -70% | -$94.1K |
|
6165
PUT
Avnet
AVT
$7.12B
| $46K | ﹤0.01% |
900
-5,600
| -86% | -$287K |
|
6166
PUT
DMC Global
BOOM
$128M
| $46K | ﹤0.01% |
3,200
+2,600
| +433% | +$38.8K |
|
6167
Cabaletta Bio
CABA
$444M
| $46K | ﹤0.01% |
+6,204
| New | +$76K |
|
6168
PUT
Coursera
COUR
$1.51B
| $46K | ﹤0.01% |
6,500
-16,000
| -71% | -$152K |
|
6169
PUT
Cooper-Standard Automotive
CPS
$514M
| $46K | ﹤0.01% |
3,700
-3,000
| -45% | -$43K |
|
6170
CALL
The Honest Company
HNST
$409M
| $46K | ﹤0.01% |
16,000
+10,800
| +208% | +$32.1K |
|
|
OPLN
6171
CALL
Openlane
OPLN
$4.29B
| $46K | ﹤0.01% |
2,800
-600
| -18% | -$10.3K |
|
6172
Limbach Holdings
LMB
$833M
| $46K | ﹤0.01% |
813
-2,672
| -77% | -$132K |
|
6173
PUT
Larimar Therapeutics
LRMR
$398M
| $46K | ﹤0.01% |
6,400
-26,600
| -81% | -$204K |
|
6174
CALL
Mayville Engineering Co
MEC
$660M
| $46K | ﹤0.01% |
2,800
+100
| +4% | +$1.51K |
|
6175
PUT
Nordson
NDSN
$16.4B
| $46K | ﹤0.01% |
200
+100
| +100% | +$25.2K |
|
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.