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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7076
PUT
Ovid Therapeutics
OVID
$440M
| $12K | ﹤0.01% |
10,900
-100
| -0.9% | -$104 |
|
7077
CALL
Precigen
PGEN
$1.97B
| $12K | ﹤0.01% |
13,700
+6,000
| +78% | +$7.57K |
|
7078
PRA Group
PRAA
$688M
| $12K | ﹤0.01% |
569
-4,512
| -89% | -$100K |
|
7079
CALL
Qualys
QLYS
$4.78B
| $12K | ﹤0.01% |
100
-700
| -88% | -$92.4K |
|
7080
PUT
Quanterix
QTRX
$164M
| $12K | ﹤0.01% |
+1,000
| New | +$13.4K |
|
7081
Reservoir Media
RSVR
$731M
| $12K | ﹤0.01% |
+1,544
| New | +$11.8K |
|
7082
PUT
Revvity
RVTY
$12.4B
| $12K | ﹤0.01% |
100
-5,900
| -98% | -$694K |
|
7083
Similarweb
SMWB
$630M
| $12K | ﹤0.01% |
+1,396
| New | +$11K |
|
7084
Invesco PHLX Semiconductor ETF
SOXQ
$2.22B
| $12K | ﹤0.01% |
+295
| New | +$11.9K |
|
|
SPNS
7085
DELISTED
Sapiens International
SPNS
| $12K | ﹤0.01% |
+327
| New | +$11.9K |
|
7086
CALL
Stoke Therapeutics
STOK
$1.83B
| $12K | ﹤0.01% |
1,000
-800
| -44% | -$11.3K |
|
|
TOUR
7087
Tuniu
TOUR
$56.9M
| $12K | ﹤0.01% |
905
-226
| -20% | -$1.97K |
|
7088
CALL
Turning Point Brands
TPB
$1.56B
| $12K | ﹤0.01% |
300
-2,000
| -87% | -$76.4K |
|
|
TUYA
7089
Tuya Inc
TUYA
$1.02B
| $12K | ﹤0.01% |
7,738
+5,640
| +269% | +$8.61K |
|
7090
CALL
Verastem
VSTM
$547M
| $12K | ﹤0.01% |
4,200
+3,100
| +282% | +$8.41K |
|
7091
PUT
Arq
ARQ
$83.7M
| $12K | ﹤0.01% |
2,100
+1,700
| +425% | +$10.4K |
|
|
TE
7092
PUT
T1 Energy
TE
$1.16B
| $12K | ﹤0.01% |
12,500
+5,800
| +87% | +$7.92K |
|
|
ARTY
7093
iShares Future AI & Tech ETF
ARTY
$3.35B
| $12K | ﹤0.01% |
365
+62
| +20% | +$2.06K |
|
|
TBNK
7094
CALL
DELISTED
Territorial Bancorp Inc.
TBNK
| $12K | ﹤0.01% |
1,200
+200
| +20% | +$1.88K |
|
|
NAPA
7095
CALL
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $12K | ﹤0.01% |
2,100
+100
| +5% | +$658 |
|
7096
CALL
American Battery Technology Co
ABAT
$297M
| $11K | ﹤0.01% |
11,000
+8,200
| +293% | +$8.53K |
|
7097
PUT
ADC Therapeutics
ADCT
$141M
| $11K | ﹤0.01% |
3,700
-800
| -18% | -$2.52K |
|
7098
PUT
Adtran
ADTN
$730M
| $11K | ﹤0.01% |
1,900
-1,500
| -44% | -$8.35K |
|
7099
CALL
Apogee Therapeutics
APGE
$10.1B
| $11K | ﹤0.01% |
+200
| New | +$9.58K |
|
|
7100
PUT
Apogee Therapeutics
APGE
$10.1B
| $11K | ﹤0.01% |
200
-200
| -50% | -$9.58K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.