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 | |
|---|---|---|---|---|---|---|
2676
CALL
Applied Digital
APLD
$7.77B
| $1.27M | ﹤0.01% |
213,200
-140,100
| -40% | -$544K |
|
2677
CALL
Vaxcyte
PCVX
$7.89B
| $1.27M | ﹤0.01% |
16,800
+9,200
| +121% | +$626K |
|
2678
CALL
Badger Meter
BMI
$3.66B
| $1.27M | ﹤0.01% |
6,800
+5,900
| +656% | +$1.08M |
|
2679
Upstart Holdings
UPST
$2.58B
| $1.27M | ﹤0.01% |
+53,729
| New | +$1.3M |
|
2680
iShares 3-7 Year Treasury Bond ETF
IEI
$18.1B
| $1.26M | ﹤0.01% |
+10,957
| New | +$1.26M |
|
2681
CALL
Outfront Media
OUT
$5.64B
| $1.26M | ﹤0.01% |
89,609
+39,623
| +79% | +$581K |
|
2682
PUT
Sundial Growers
SNDL
$325M
| $1.26M | ﹤0.01% |
664,000
+41,200
| +7% | +$88.3K |
|
2683
CALL
Danaos Corp
DAC
$2.55B
| $1.26M | ﹤0.01% |
13,600
-3,600
| -21% | -$300K |
|
2684
CALL
Geron
GERN
$911M
| $1.25M | ﹤0.01% |
296,100
-605,400
| -67% | -$2.36M |
|
2685
CALL
Hycroft Mining Holding Corp
HYMC
$1.85B
| $1.25M | ﹤0.01% |
523,200
+17,700
| +4% | +$57.8K |
|
2686
STMicroelectronics
STM
$46B
| $1.25M | ﹤0.01% |
31,970
-42,657
| -57% | -$1.77M |
|
2687
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $1.25M | ﹤0.01% |
9,200
+3,400
| +59% | +$463K |
|
2688
CALL
Vista Energy
VIST
$7.75B
| $1.25M | ﹤0.01% |
27,500
-30,000
| -52% | -$1.33M |
|
2689
Evolv Technologies
EVLV
$943M
| $1.25M | ﹤0.01% |
489,158
+162,233
| +50% | +$537K |
|
2690
CALL
Globus Medical
GMED
$10.4B
| $1.25M | ﹤0.01% |
18,200
+1,400
| +8% | +$83.6K |
|
2691
Skywest
SKYW
$4.11B
| $1.25M | ﹤0.01% |
15,184
-11,394
| -43% | -$851K |
|
2692
CALL
US Foods
USFD
$21.4B
| $1.25M | ﹤0.01% |
23,500
+10,500
| +81% | +$552K |
|
2693
PUT
Sabre
SABR
$656M
| $1.24M | ﹤0.01% |
466,100
+83,900
| +22% | +$235K |
|
|
CRON
2694
PUT
Cronos Group
CRON
$1.05B
| $1.24M | ﹤0.01% |
533,900
-407,000
| -43% | -$1.05M |
|
2695
CALL
AvalonBay Communities
AVB
$27.1B
| $1.24M | ﹤0.01% |
6,000
-4,300
| -42% | -$831K |
|
|
LAZR
2696
CALL
DELISTED
Luminar Technologies
LAZR
| $1.24M | ﹤0.01% |
55,527
-10,653
| -16% | -$252K |
|
2697
CALL
Seadrill
SDRL
$2.81B
| $1.24M | ﹤0.01% |
24,100
+2,900
| +14% | +$147K |
|
2698
Stellantis
STLA
$16.5B
| $1.24M | ﹤0.01% |
62,375
+1,014
| +2% | +$23.5K |
|
2699
Polaris
PII
$4.15B
| $1.24M | ﹤0.01% |
+15,786
| New | +$1.34M |
|
|
HTGCR
2700
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.23M | ﹤0.01% |
60,300
+23,900
| +66% | +$489K |
|
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.