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 | |
|---|---|---|---|---|---|---|
2751
Ecopetrol
EC
$32.9B
| $751K | ﹤0.01% |
71,743
+64,436
| +882% | +$628K |
|
2752
CALL
Navient
NAVI
$774M
| $750K | ﹤0.01% |
45,600
+19,400
| +74% | +$307K |
|
|
PACW
2753
DELISTED
PacWest Bancorp
PACW
| $750K | ﹤0.01% |
32,698
+6,886
| +27% | +$167K |
|
2754
PUT
A.O. Smith
AOS
$8.38B
| $749K | ﹤0.01% |
13,100
-5,200
| -28% | -$291K |
|
2755
CALL
Eastman Chemical
EMN
$7.8B
| $749K | ﹤0.01% |
9,200
+4,600
| +100% | +$371K |
|
2756
CALL
SFL Corp
SFL
$1.59B
| $748K | ﹤0.01% |
81,200
-69,500
| -46% | -$675K |
|
|
LTC
2757
CALL
LTC Properties
LTC
$2.16B
| $746K | ﹤0.01% |
21,000
+7,200
| +52% | +$274K |
|
2758
CALL
Main Street Capital
MAIN
$4.97B
| $746K | ﹤0.01% |
20,200
-35,400
| -64% | -$1.29M |
|
2759
PUT
QuidelOrtho
QDEL
$1.09B
| $745K | ﹤0.01% |
8,700
-1,800
| -17% | -$152K |
|
2760
PUT
Sprout Social
SPT
$455M
| $745K | ﹤0.01% |
13,200
+400
| +3% | +$23.5K |
|
2761
CALL
Invesco
IVZ
$13.3B
| $744K | ﹤0.01% |
41,400
+22,900
| +124% | +$392K |
|
2762
TAL Education Group
TAL
$5.71B
| $744K | ﹤0.01% |
105,575
+42,582
| +68% | +$236K |
|
2763
CALL
Amylyx Pharmaceuticals
AMLX
$2.05B
| $742K | ﹤0.01% |
20,100
-241,700
| -92% | -$8.58M |
|
|
XIFR
2764
PUT
XPLR Infrastructure LP
XIFR
$1.18B
| $742K | ﹤0.01% |
10,600
-5,100
| -32% | -$382K |
|
2765
Sibanye-Stillwater
SBSW
$5.92B
| $741K | ﹤0.01% |
69,549
-195,673
| -74% | -$1.99M |
|
2766
CALL
Arcutis Biotherapeutics
ARQT
$3.42B
| $740K | ﹤0.01% |
+50,000
| New | +$874K |
|
2767
CALL
Emcor
EME
$33.1B
| $740K | ﹤0.01% |
5,000
-2,800
| -36% | -$397K |
|
2768
CALL
New York Times
NYT
$11.6B
| $740K | ﹤0.01% |
22,800
-56,300
| -71% | -$1.83M |
|
2769
CALL
Pembina Pipeline
PBA
$29.9B
| $740K | ﹤0.01% |
21,800
+500
| +2% | +$16.8K |
|
|
MACK
2770
PUT
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $740K | ﹤0.01% |
64,600
+58,700
| +995% | +$483K |
|
2771
PUT
JFrog
FROG
$9.71B
| $738K | ﹤0.01% |
34,600
-31,600
| -48% | -$718K |
|
2772
PUT
Ubiquiti
UI
$31.8B
| $738K | ﹤0.01% |
2,700
+1,100
| +69% | +$327K |
|
2773
PUT
Aehr Test Systems
AEHR
$2.48B
| $737K | ﹤0.01% |
36,700
+24,700
| +206% | +$528K |
|
2774
PUT
Hormel Foods
HRL
$13.9B
| $737K | ﹤0.01% |
16,200
-12,100
| -43% | -$563K |
|
2775
PUT
Lightspeed Commerce
LSPD
$1.3B
| $737K | ﹤0.01% |
51,600
-51,200
| -50% | -$834K |
|
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.