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 | |
|---|---|---|---|---|---|---|
7576
CALL
IPG Photonics
IPGP
$3.78B
| $8K | ﹤0.01% |
100
-2,400
| -96% | -$207K |
|
7577
Ituran Location and Control
ITRN
$1.09B
| $8K | ﹤0.01% |
+342
| New | +$9.07K |
|
7578
PUT
Jakks Pacific
JAKK
$298M
| $8K | ﹤0.01% |
500
-800
| -62% | -$15.8K |
|
7579
James Hardie Industries
JHX
$15.4B
| $8K | ﹤0.01% |
278
+271
| +3,871% | +$9.32K |
|
7580
Jones Lang LaSalle
JLL
$15.4B
| $8K | ﹤0.01% |
+40
| New | +$7.76K |
|
7581
CALL
Kaiser Aluminum
KALU
$2.59B
| $8K | ﹤0.01% |
+100
| New | +$9.31K |
|
7582
PUT
Kopin
KOPN
$663M
| $8K | ﹤0.01% |
10,300
-9,100
| -47% | -$8.86K |
|
7583
PUT
Kymera Therapeutics
KYMR
$9.15B
| $8K | ﹤0.01% |
+300
| New | +$10.4K |
|
7584
PUT
Ligand Pharmaceuticals
LGND
$5.92B
| $8K | ﹤0.01% |
100
-1,300
| -93% | -$103K |
|
7585
PUT
Lightbridge
LTBR
$260M
| $8K | ﹤0.01% |
+2,600
| New | +$6.96K |
|
|
LX
7586
PUT
LexinFintech Holdings
LX
$239M
| $8K | ﹤0.01% |
5,000
-2,200
| -31% | -$3.9K |
|
7587
CALL
908 Devices
MASS
$288M
| $8K | ﹤0.01% |
1,700
-1,300
| -43% | -$7.85K |
|
7588
CALL
Merchants Bancorp
MBIN
$2.21B
| $8K | ﹤0.01% |
200
-100
| -33% | -$4.1K |
|
7589
Marcus Corp
MCS
$753M
| $8K | ﹤0.01% |
764
+32
| +4% | +$380 |
|
7590
MediWound
MDWD
$188M
| $8K | ﹤0.01% |
566
+426
| +304% | +$7.04K |
|
|
RJET
7591
CALL
Republic Airways Holdings
RJET
$824M
| $8K | ﹤0.01% |
+327
| New | +$5.35K |
|
7592
PUT
Ingevity
NGVT
$2.56B
| $8K | ﹤0.01% |
+200
| New | +$9.66K |
|
7593
CALL
Nomad Foods
NOMD
$1.68B
| $8K | ﹤0.01% |
500
-2,400
| -83% | -$43.2K |
|
7594
OFS Capital
OFS
$45.6M
| $8K | ﹤0.01% |
929
+871
| +1,502% | +$8.4K |
|
7595
ProShares K-1 Free Crude Oil Strategy ETF
OILK
$206M
| $8K | ﹤0.01% |
178
-84
| -32% | -$3.98K |
|
7596
CALL
OPAL Fuels
OPAL
$67.1M
| $8K | ﹤0.01% |
2,100
+200
| +11% | +$940 |
|
7597
PUT
Ovid Therapeutics
OVID
$448M
| $8K | ﹤0.01% |
+11,000
| New | +$30.6K |
|
|
PBPB
7598
PUT
DELISTED
Potbelly
PBPB
| $8K | ﹤0.01% |
1,000
-4,300
| -81% | -$39.8K |
|
7599
VanEck Preferred Securities ex Financials ETF
PFXF
$2.39B
| $8K | ﹤0.01% |
519
-1,013
| -66% | -$17.6K |
|
7600
ePlus
PLUS
$2.35B
| $8K | ﹤0.01% |
+114
| New | +$8.71K |
|
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.