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 | |
|---|---|---|---|---|---|---|
|
EU
6701
PUT
enCore Energy
EU
$206M
| $19K | ﹤0.01% |
4,800
-3,900
| -45% | -$14.5K |
|
6702
PUT
FNB Corp
FNB
$6.76B
| $19K | ﹤0.01% |
1,400
+400
| +40% | +$5.71K |
|
|
HDSN
6703
CALL
Hudson Technologies
HDSN
$246M
| $19K | ﹤0.01% |
2,300
-26,000
| -92% | -$215K |
|
6704
CALL
Holley
HLLY
$335M
| $19K | ﹤0.01% |
6,500
-44,700
| -87% | -$150K |
|
6705
PUT
Heron Therapeutics
HRTX
$93.4M
| $19K | ﹤0.01% |
10,000
-12,700
| -56% | -$30.3K |
|
6706
Immunome
IMNM
$2.62B
| $19K | ﹤0.01% |
+1,326
| New | +$18.8K |
|
6707
CALL
Ispire Technology
ISPR
$86.1M
| $19K | ﹤0.01% |
3,100
-6,300
| -67% | -$45.5K |
|
6708
Ituran Location and Control
ITRN
$1.08B
| $19K | ﹤0.01% |
740
+398
| +116% | +$10.6K |
|
6709
PUT
Mama's Creations
MAMA
$846M
| $19K | ﹤0.01% |
2,700
+600
| +29% | +$4.61K |
|
6710
CALL
MediWound
MDWD
$184M
| $19K | ﹤0.01% |
1,100
+900
| +450% | +$16.4K |
|
6711
CALL
ePlus
PLUS
$2.43B
| $19K | ﹤0.01% |
+200
| New | +$17.6K |
|
6712
Prelude Therapeutics
PRLD
$375M
| $19K | ﹤0.01% |
+9,332
| New | +$43.2K |
|
6713
CALL
Rigetti Computing
RGTI
$4.39B
| $19K | ﹤0.01% |
25,000
+16,600
| +198% | +$15.1K |
|
6714
CALL
Star Group
SGU
$413M
| $19K | ﹤0.01% |
1,700
+700
| +70% | +$7.95K |
|
6715
PUT
SPS Commerce
SPSC
$2.55B
| $19K | ﹤0.01% |
+100
| New | +$19.6K |
|
6716
ProShares Ultra 7-10 Year Treasury
UST
$15.9M
| $19K | ﹤0.01% |
435
+269
| +162% | +$12.1K |
|
6717
CALL
Weave Communications
WEAV
$553M
| $19K | ﹤0.01% |
1,500
-700
| -32% | -$7.38K |
|
6718
West Fraser Timber
WFG
$5.21B
| $19K | ﹤0.01% |
+196
| New | +$16.8K |
|
6719
Cactus
WHD
$3.63B
| $19K | ﹤0.01% |
+325
| New | +$18.9K |
|
6720
CALL
WisdomTree
WT
$2.79B
| $19K | ﹤0.01% |
2,000
-500
| -20% | -$5.08K |
|
|
6721
PUT
WisdomTree
WT
$2.79B
| $19K | ﹤0.01% |
2,000
-800
| -29% | -$8.13K |
|
|
WW
6722
PUT
DELISTED
WW International
WW
| $19K | ﹤0.01% |
21,700
+5,900
| +37% | +$5.73K |
|
6723
Zymeworks
ZYME
$1.62B
| $19K | ﹤0.01% |
1,530
-10,581
| -87% | -$115K |
|
6724
PUT
Absci
ABSI
$1.17B
| $18K | ﹤0.01% |
4,900
+3,200
| +188% | +$12.7K |
|
6725
CALL
Angi Inc
ANGI
$247M
| $18K | ﹤0.01% |
720
+10
| +1% | +$241 |
|
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.