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 | |
|---|---|---|---|---|---|---|
2251
Ferguson
FERG
$44.7B
| $2.07M | ﹤0.01% |
+10,405
| New | +$2.11M |
|
2252
Aptiv
APTV
$12B
| $2.06M | ﹤0.01% |
28,659
+21,556
| +303% | +$1.51M |
|
|
UNIT
2253
CALL
Uniti Group
UNIT
$2.63B
| $2.06M | ﹤0.01% |
365,700
+337,600
| +1,201% | +$1.44M |
|
2254
PUT
Organon & Co
OGN
$3.55B
| $2.06M | ﹤0.01% |
107,700
-1,400
| -1% | -$29K |
|
2255
Western Digital
WDC
$179B
| $2.06M | ﹤0.01% |
39,878
+2,285
| +6% | +$115K |
|
2256
CALL
TAL Education Group
TAL
$5.71B
| $2.05M | ﹤0.01% |
173,500
-111,400
| -39% | -$1.03M |
|
|
EH
2257
CALL
EHang Holdings
EH
$372M
| $2.05M | ﹤0.01% |
144,900
+24,700
| +21% | +$323K |
|
2258
CALL
Altimmune
ALT
$539M
| $2.05M | ﹤0.01% |
333,500
+114,900
| +53% | +$778K |
|
2259
Annaly Capital Management
NLY
$16.9B
| $2.05M | ﹤0.01% |
102,034
+13,744
| +16% | +$275K |
|
|
SQSP
2260
PUT
DELISTED
Squarespace, Inc.
SQSP
| $2.05M | ﹤0.01% |
44,100
-19,200
| -30% | -$861K |
|
|
HTGCR
2261
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $2.05M | ﹤0.01% |
104,200
+43,900
| +73% | +$862K |
|
2262
PUT
IQVIA
IQV
$34.7B
| $2.04M | ﹤0.01% |
8,600
+700
| +9% | +$165K |
|
2263
PUT
WD-40
WDFC
$3.1B
| $2.04M | ﹤0.01% |
7,900
-700
| -8% | -$176K |
|
|
EH
2264
PUT
EHang Holdings
EH
$372M
| $2.03M | ﹤0.01% |
143,800
-129,400
| -47% | -$1.69M |
|
2265
AppFolio
APPF
$5.85B
| $2.03M | ﹤0.01% |
8,614
+6,797
| +374% | +$1.59M |
|
2266
CALL
Pilgrim's Pride
PPC
$6.82B
| $2.03M | ﹤0.01% |
44,000
+35,700
| +430% | +$1.51M |
|
2267
Hawaiian Electric Industries
HE
$2.33B
| $2.02M | ﹤0.01% |
+209,214
| New | +$2.59M |
|
2268
CALL
Gates Industrial Corporation Ltd.
GTES
$6.81B
| $2.02M | ﹤0.01% |
115,300
-1,700
| -1% | -$28.9K |
|
2269
Suncor Energy
SU
$77.7B
| $2.02M | ﹤0.01% |
+54,702
| New | +$2.11M |
|
2270
PUT
VICI Properties
VICI
$29.4B
| $2.01M | ﹤0.01% |
60,300
+14,800
| +33% | +$468K |
|
2271
PUT
Opendoor
OPEN
$3.69B
| $2.01M | ﹤0.01% |
1,037,053
+200,156
| +24% | +$406K |
|
2272
PUT
Equinor
EQNR
$95.9B
| $2.01M | ﹤0.01% |
79,200
-2,000
| -2% | -$52.8K |
|
2273
Costco
COST
$415B
| $2M | ﹤0.01% |
+2,260
| New | +$1.96M |
|
2274
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $2M | ﹤0.01% |
17,900
-25,400
| -59% | -$2.78M |
|
|
SA
2275
Seabridge Gold
SA
$2.8B
| $2M | ﹤0.01% |
119,276
+22,085
| +23% | +$359K |
|
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.