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 | |
|---|---|---|---|---|---|---|
5276
CALL
Pliant Therapeutics
PLRX
$64.4M
| $96K | ﹤0.01% |
8,600
+3,900
| +83% | +$48.8K |
|
5277
CALL
PROG Holdings
PRG
$1.75B
| $96K | ﹤0.01% |
2,000
+500
| +33% | +$21.2K |
|
|
ACCD
5278
CALL
DELISTED
Accolade Inc
ACCD
| $96K | ﹤0.01% |
25,000
+12,000
| +92% | +$47K |
|
|
OLK
5279
CALL
DELISTED
Olink Holding AB (publ) American Depositary Shares
OLK
| $96K | ﹤0.01% |
3,700
-11,600
| -76% | -$299K |
|
5280
ABM Industries
ABM
$2.81B
| $95K | ﹤0.01% |
+1,806
| New | +$95.5K |
|
5281
CALL
Artivion
AORT
$1.3B
| $95K | ﹤0.01% |
3,600
+1,800
| +100% | +$46.8K |
|
5282
CALL
Ashland
ASH
$3.33B
| $95K | ﹤0.01% |
1,100
+100
| +10% | +$8.96K |
|
5283
PUT
iHeartMedia
IHRT
$543M
| $95K | ﹤0.01% |
51,600
+100
| +0.2% | +$149 |
|
5284
CALL
Kaspi.kz JSC
KSPI
$16.9B
| $95K | ﹤0.01% |
900
-600
| -40% | -$74.5K |
|
5285
PUT
LivePerson
LPSN
$21.8M
| $95K | ﹤0.01% |
+4,953
| New | +$84K |
|
|
LTC
5286
PUT
LTC Properties
LTC
$2.06B
| $95K | ﹤0.01% |
2,600
-1,400
| -35% | -$50.7K |
|
5287
CALL
Global X MSCI Norway ETF
NORW
$88M
| $95K | ﹤0.01% |
4,900
-3,800
| -44% | -$96.9K |
|
5288
PUT
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.52B
| $95K | ﹤0.01% |
500
-3,400
| -87% | -$642K |
|
5289
Redwire
RDW
$2.06B
| $95K | ﹤0.01% |
+13,904
| New | +$91.8K |
|
5290
CALL
Advanced Energy
AEIS
$11.6B
| $94K | ﹤0.01% |
900
-4,200
| -82% | -$441K |
|
5291
AudioEye
AEYE
$72.3M
| $94K | ﹤0.01% |
4,120
-17,298
| -81% | -$381K |
|
5292
CALL
Bank of Hawaii
BOH
$3.15B
| $94K | ﹤0.01% |
1,500
-2,400
| -62% | -$154K |
|
5293
PUT
BlueLinx
BXC
$422M
| $94K | ﹤0.01% |
900
| – | – |
|
5294
CALL
Church & Dwight Co
CHD
$23.4B
| $94K | ﹤0.01% |
900
-1,600
| -64% | -$164K |
|
5295
CALL
Central Pacific Financial
CPF
$1.02B
| $94K | ﹤0.01% |
3,200
+2,400
| +300% | +$61.7K |
|
5296
PUT
Cousins Properties
CUZ
$5.19B
| $94K | ﹤0.01% |
3,200
+2,600
| +433% | +$70K |
|
5297
CALL
Navitas Semiconductor
NVTS
$2.84B
| $94K | ﹤0.01% |
38,700
+10,400
| +37% | +$33.8K |
|
|
SLRN
5298
DELISTED
ACELYRIN
SLRN
| $94K | ﹤0.01% |
+19,200
| New | +$99.1K |
|
5299
CALL
Spire
SR
$4.72B
| $94K | ﹤0.01% |
+1,400
| New | +$90.9K |
|
5300
Vermilion Energy
VET
$1.82B
| $94K | ﹤0.01% |
9,671
-9,341
| -49% | -$94.8K |
|
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.