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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
UCB
4176
CALL
United Community Banks
UCB
$4.24B
| $278K | ﹤0.01% |
8,400
+7,100
| +546% | +$236K |
|
|
LHCG
4177
CALL
DELISTED
LHC Group LLC
LHCG
| $278K | ﹤0.01% |
1,700
+700
| +70% | +$114K |
|
4178
PUT
Cellebrite
CLBT
$3.68B
| $277K | ﹤0.01% |
70,800
+1,100
| +2% | +$5.51K |
|
4179
PUT
Eastman Chemical
EMN
$8B
| $277K | ﹤0.01% |
3,900
-33,400
| -90% | -$3M |
|
|
HOLX
4180
DELISTED
Hologic
HOLX
| $277K | ﹤0.01% |
4,306
-12,614
| -75% | -$874K |
|
|
MAG
4181
PUT
DELISTED
MAG Silver
MAG
| $277K | ﹤0.01% |
22,200
-4,900
| -18% | -$60.7K |
|
4182
Open Text
OTEX
$6.15B
| $277K | ﹤0.01% |
10,477
+9,439
| +909% | +$333K |
|
4183
PUT
Opko Health
OPK
$985M
| $276K | ﹤0.01% |
146,100
-150,800
| -51% | -$357K |
|
4184
CALL
Power Integrations
POWI
$3.38B
| $276K | ﹤0.01% |
4,300
+600
| +16% | +$44.9K |
|
4185
Invesco Solar ETF
TAN
$1.42B
| $276K | ﹤0.01% |
3,750
+1,620
| +76% | +$131K |
|
4186
Comstock Resources
CRK
$3.89B
| $275K | ﹤0.01% |
+15,931
| New | +$264K |
|
4187
Cedar Fair
FUN
$1.77B
| $275K | ﹤0.01% |
6,683
-3,786
| -36% | -$161K |
|
4188
CALL
Howmet Aerospace
HWM
$113B
| $275K | ﹤0.01% |
8,900
+4,400
| +98% | +$154K |
|
|
4189
PUT
Howmet Aerospace
HWM
$113B
| $275K | ﹤0.01% |
8,900
-9,900
| -53% | -$347K |
|
4190
PUT
iRhythm Holdings
IRTC
$3.85B
| $275K | ﹤0.01% |
2,200
+700
| +47% | +$101K |
|
4191
PUT
Blue Owl Capital
OBDC
$5.34B
| $275K | ﹤0.01% |
26,600
-14,800
| -36% | -$188K |
|
4192
CALL
Brunswick
BC
$5.13B
| $274K | ﹤0.01% |
4,200
-3,000
| -42% | -$225K |
|
4193
ImmunityBio
IBRX
$7.51B
| $274K | ﹤0.01% |
55,252
+14,400
| +35% | +$65.6K |
|
4194
PUT
Veeco
VECO
$3.05B
| $274K | ﹤0.01% |
15,000
+14,500
| +2,900% | +$297K |
|
4195
VanEck Brazil Small-Cap ETF
BRF
$21.9M
| $273K | ﹤0.01% |
17,885
+15,820
| +766% | +$243K |
|
4196
CALL
Sprinklr
CXM
$1.49B
| $273K | ﹤0.01% |
29,700
+4,900
| +20% | +$55.2K |
|
4197
PUT
Madison Square Garden
MSGS
$9.48B
| $273K | ﹤0.01% |
2,000
-2,400
| -55% | -$372K |
|
|
OBE
4198
CALL
Obsidian Energy
OBE
$716M
| $273K | ﹤0.01% |
38,200
+32,200
| +537% | +$261K |
|
4199
PUT
Sinclair Inc
SBGI
$992M
| $273K | ﹤0.01% |
15,100
+13,700
| +979% | +$304K |
|
4200
PUT
Tronox
TROX
$932M
| $273K | ﹤0.01% |
22,300
+2,000
| +10% | +$29.7K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.