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 | |
|---|---|---|---|---|---|---|
3851
XP
XP
$8.68B
| $414K | ﹤0.01% |
+23,561
| New | +$487K |
|
3852
CALL
NCR Atleos
NATL
$3.47B
| $413K | ﹤0.01% |
15,300
-47,900
| -76% | -$1.17M |
|
|
DVAX
3853
PUT
DELISTED
Dynavax Technologies
DVAX
| $412K | ﹤0.01% |
36,700
-196,400
| -84% | -$2.29M |
|
3854
CALL
NextNav
NN
$1.84B
| $412K | ﹤0.01% |
50,900
-325,100
| -86% | -$2.57M |
|
|
SRCL
3855
PUT
DELISTED
Stericycle Inc
SRCL
| $412K | ﹤0.01% |
7,100
+700
| +11% | +$35.9K |
|
3856
PUT
Sigma Lithium
SGML
$1.06B
| $411K | ﹤0.01% |
34,200
-137,000
| -80% | -$2.03M |
|
3857
CALL
Teradata
TDC
$2.75B
| $411K | ﹤0.01% |
11,900
-20,400
| -63% | -$712K |
|
3858
Wolverine World Wide
WWW
$1.71B
| $410K | ﹤0.01% |
30,367
-32,016
| -51% | -$385K |
|
3859
CALL
Alkermes
ALKS
$8.42B
| $409K | ﹤0.01% |
17,000
+6,500
| +62% | +$159K |
|
3860
3D Systems Corp
DDD
$412M
| $409K | ﹤0.01% |
133,350
-24,022
| -15% | -$88.1K |
|
3861
MKS Inc
MKSI
$19.3B
| $409K | ﹤0.01% |
3,137
+1,052
| +50% | +$133K |
|
3862
Navigator Holdings
NVGS
$1.34B
| $409K | ﹤0.01% |
23,452
+13,598
| +138% | +$219K |
|
3863
CALL
ACV Auctions
ACVA
$1.43B
| $408K | ﹤0.01% |
22,400
-39,500
| -64% | -$710K |
|
3864
CALL
Schrodinger
SDGR
$1.14B
| $408K | ﹤0.01% |
21,100
-7,900
| -27% | -$182K |
|
|
WW
3865
CALL
DELISTED
WW International
WW
| $408K | ﹤0.01% |
349,200
-3,800
| -1% | -$6.33K |
|
3866
CALL
Aquestive Therapeutics
AQST
$472M
| $407K | ﹤0.01% |
156,600
+60,300
| +63% | +$201K |
|
3867
Expeditors International
EXPD
$22.4B
| $407K | ﹤0.01% |
3,266
+2,005
| +159% | +$239K |
|
3868
Getty Images
GETY
$171M
| $407K | ﹤0.01% |
124,898
+1,059
| +0.9% | +$3.95K |
|
3869
CALL
Navient
NAVI
$822M
| $406K | ﹤0.01% |
27,900
+1,400
| +5% | +$21.6K |
|
|
SVM
3870
Silvercorp Metals
SVM
$2.08B
| $406K | ﹤0.01% |
120,910
+48,805
| +68% | +$177K |
|
3871
PUT
SSR Mining
SSRM
$5.27B
| $405K | ﹤0.01% |
89,900
+19,600
| +28% | +$101K |
|
|
PRMW
3872
CALL
DELISTED
Primo Water Corporation
PRMW
| $404K | ﹤0.01% |
18,500
+18,400
| +18,400% | +$378K |
|
3873
PUT
Cerence
CRNC
$368M
| $403K | ﹤0.01% |
142,500
+122,300
| +605% | +$872K |
|
3874
CALL
EnerSys
ENS
$6.69B
| $403K | ﹤0.01% |
3,900
+2,600
| +200% | +$255K |
|
|
EQC
3875
DELISTED
Equity Commonwealth
EQC
| $403K | ﹤0.01% |
20,794
-5,674
| -21% | -$108K |
|
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.