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 | |
|---|---|---|---|---|---|---|
751
PUT
Suncor Energy
SU
$78.6B
| $15.3M | 0.01% |
402,200
-194,600
| -33% | -$7.52M |
|
752
PUT
Planet Fitness
PLNT
$4.21B
| $15.3M | 0.01% |
208,200
-71,200
| -25% | -$4.62M |
|
753
CALL
KE Holdings
BEKE
$17.8B
| $15.3M | 0.01% |
1,082,500
-475,700
| -31% | -$7.45M |
|
754
Valero Energy
VLO
$91.8B
| $15.3M | 0.01% |
97,670
-61,754
| -39% | -$9.96M |
|
755
PUT
Cardinal Health
CAH
$52.2B
| $15.3M | 0.01% |
155,600
+15,000
| +11% | +$1.53M |
|
756
CALL
Cognizant
CTSH
$20.1B
| $15.3M | 0.01% |
224,900
+54,800
| +32% | +$3.72M |
|
757
CALL
Warner Bros
WBD
$65.3B
| $15.3M | 0.01% |
2,050,900
+98,000
| +5% | +$785K |
|
758
PUT
Boston Properties
BXP
$10.8B
| $15.2M | 0.01% |
246,400
+24,000
| +11% | +$1.47M |
|
759
PUT
Duolingo
DUOL
$5.6B
| $15.1M | 0.01% |
72,500
+33,400
| +85% | +$6.84M |
|
760
JD.com
JD
$40.6B
| $15.1M | 0.01% |
583,923
-1,072,091
| -65% | -$31.5M |
|
761
PUT
Pultegroup
PHM
$23.4B
| $15.1M | 0.01% |
136,800
-49,300
| -26% | -$5.6M |
|
762
PUT
Corebridge Financial
CRBG
$13.9B
| $15M | 0.01% |
516,500
+268,900
| +109% | +$7.74M |
|
|
GTM
763
PUT
ZoomInfo Technologies
GTM
$825M
| $15M | 0.01% |
1,176,300
+40,700
| +4% | +$569K |
|
764
PUT
Energy Transfer Partners
ET
$70.2B
| $15M | 0.01% |
925,600
+43,600
| +5% | +$685K |
|
765
CALL
Nutanix
NTNX
$14.3B
| $15M | 0.01% |
263,400
+5,200
| +2% | +$319K |
|
766
PUT
UiPath
PATH
$5.38B
| $14.9M | 0.01% |
1,175,400
+309,400
| +36% | +$5.35M |
|
|
TYNS
767
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $14.9M | 0.01% |
146,900
+3,300
| +2% | +$335K |
|
768
PUT
Saia
SAIA
$11.3B
| $14.9M | 0.01% |
31,400
+19,800
| +171% | +$9.22M |
|
769
PUT
SL Green Realty
SLG
$3.75B
| $14.8M | 0.01% |
262,000
+41,300
| +19% | +$2.18M |
|
770
CALL
Builders FirstSource
BLDR
$7.5B
| $14.8M | 0.01% |
107,200
+27,600
| +35% | +$4.69M |
|
771
PUT
GoDaddy
GDDY
$11.6B
| $14.8M | 0.01% |
106,200
+42,900
| +68% | +$5.66M |
|
|
CGC
772
CALL
Canopy Growth
CGC
$377M
| $14.8M | 0.01% |
2,299,000
-240,500
| -9% | -$2.07M |
|
773
CALL
AeroVironment
AVAV
$7.97B
| $14.8M | 0.01% |
81,200
+26,500
| +48% | +$4.76M |
|
774
Dell
DELL
$287B
| $14.7M | 0.01% |
106,560
-22,577
| -17% | -$3.03M |
|
775
CALL
Generac Holdings
GNRC
$12.4B
| $14.7M | 0.01% |
111,000
-56,800
| -34% | -$7.85M |
|
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.