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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3076
CALL
Alight
ALIT
$520M
| $544K | ﹤0.01% |
3,255
+2,365
| +266% | +$394K |
|
3077
PUT
Essent Group
ESNT
$6.12B
| $544K | ﹤0.01% |
14,000
+8,600
| +159% | +$327K |
|
|
BTWN
3078
CALL
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $542K | ﹤0.01% |
54,700
-42,300
| -44% | -$418K |
|
3079
Macerich
MAC
$7.41B
| $541K | ﹤0.01% |
48,100
-2,693
| -5% | -$30.4K |
|
3080
Transmedics
TMDX
$2.57B
| $540K | ﹤0.01% |
+8,757
| New | +$465K |
|
|
TWO
3081
PUT
Two Harbors Investment
TWO
$1.27B
| $540K | ﹤0.01% |
34,300
+27,450
| +401% | +$412K |
|
3082
PUT
Zions Bancorporation
ZION
$10B
| $540K | ﹤0.01% |
11,000
-11,900
| -52% | -$595K |
|
3083
Celldex Therapeutics
CLDX
$2.8B
| $539K | ﹤0.01% |
12,102
+3,186
| +36% | +$114K |
|
3084
PUT
Pentair
PNR
$10.2B
| $535K | ﹤0.01% |
11,900
-5,400
| -31% | -$235K |
|
|
GOL
3085
PUT
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $535K | ﹤0.01% |
200,400
+2,200
| +1% | +$7.17K |
|
3086
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.7M
| $534K | ﹤0.01% |
4,600
-3,300
| -42% | -$372K |
|
3087
Intel
INTC
$462B
| $534K | ﹤0.01% |
20,227
+14,827
| +275% | +$412K |
|
3088
PUT
PACCAR
PCAR
$70.2B
| $534K | ﹤0.01% |
8,100
+4,650
| +135% | +$304K |
|
3089
CALL
SSR Mining
SSRM
$5.45B
| $534K | ﹤0.01% |
34,100
+5,500
| +19% | +$80.6K |
|
|
MAXN
3090
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $533K | ﹤0.01% |
332
+95
| +40% | +$188K |
|
3091
PUT
Ollie's Bargain Outlet
OLLI
$4.04B
| $533K | ﹤0.01% |
11,400
-3,500
| -23% | -$189K |
|
3092
CALL
Amphenol
APH
$184B
| $532K | ﹤0.01% |
14,000
-51,800
| -79% | -$1.96M |
|
3093
CALL
Invesco CurrencyShares Australian Dollar Trust
FXA
$97M
| $532K | ﹤0.01% |
7,900
+200
| +3% | +$13K |
|
|
HAPN
3094
Happen Inc
HAPN
$2.16B
| $532K | ﹤0.01% |
60,468
+27,889
| +86% | +$287K |
|
3095
PUT
Xcel Energy
XEL
$50.4B
| $532K | ﹤0.01% |
7,600
-120,800
| -94% | -$8.04M |
|
3096
CALL
DoubleVerify
DV
$1.68B
| $531K | ﹤0.01% |
24,200
-68,400
| -74% | -$1.78M |
|
3097
PUT
Veru
VERU
$36.6M
| $531K | ﹤0.01% |
10,070
-180,180
| -95% | -$14.8M |
|
|
CEI
3098
CALL
DELISTED
Camber Energy, Inc
CEI
| $531K | ﹤0.01% |
262,900
+244,868
| +1,358% | +$1.54M |
|
3099
Black Stone Minerals
BSM
$3.17B
| $530K | ﹤0.01% |
31,445
+26,630
| +553% | +$471K |
|
3100
Neogen
NEOG
$2.03B
| $530K | ﹤0.01% |
34,860
-36,862
| -51% | -$525K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.